Terminal and communication method

Abstract

This terminal comprises: a reception unit that receives, from a base station, information including a parameter of an additional physical random access channel (PRACH) resource; and a control unit that sets the received parameter of the additional PRACH resource in the terminal.

Description

Terminal and Communication Method

[0004]

[0001] The present invention relates to a terminal and a communication method in a wireless communication system.

[0002] In NR (New Radio), which is a successor system to LTE (Long Term Evolution) (also referred to as "5G"), technologies that meet requirements such as a large-capacity system, high data transmission speed, low latency, simultaneous connection of a large number of terminals, low cost, and power saving are being studied (for example, Non-Patent Document 1).

[0003] Also, in Release 18 of 3GPP (registered trademark), in order to achieve environmental sustainability, carbon neutrality, SDGs (Sustainable Development Goals), reduction of operating costs, etc., network energy savings (NES) in the network has become more important, and methods for energy savings are being studied (for example, Non-Patent Document 2). To realize NES, additional PRACH (Physical random access channel) settings that are dynamically adapted are required.

[0004] 3GPP TS 38.300 V18.4.0 (2024-12) "New WID: Network energy savings for NR", RP-Prop 223540, 3GPP TSG RAN Meeting #98-e, December 2022 3GPP TS 38.211 V18.5.0 (2024-12) 3GPP TS 38.331 V18.4.0 (2024-12)

[0005] However, a method for setting additional PRACH resources of BWP (Bandwidth Part) for a terminal or controlling the activation (activation) or deactivation (deactivation) of the additional PRACH resources of BWP has not been clarified. Therefore, there is a possibility that the terminal cannot execute communication using the additional PRACH resources of BWP.

[0006] The terminal in this embodiment includes a receiving unit that receives information including parameters for additional PRACH resources from a base station, and a control unit that sets the received parameters for additional PRACH resources on the terminal.

[0007] According to this embodiment, the terminal can perform communication using additional PRACH resources in the BWP.

[0008] This is a diagram illustrating the wireless communication system in this embodiment. This is a diagram illustrating an example of BWP switching operation in this embodiment. This is a sequence diagram showing an example of the operation of the wireless communication system in Example 1-1. This is a sequence diagram showing an example of the operation of the wireless communication system in Example 1-2. This is a flowchart showing an example of the operation of a terminal in Example 1-3. This is a flowchart showing an example of the operation of a terminal in Example 1-4. This is a sequence diagram showing an example of the operation of the wireless communication system in Example 2. This is a diagram showing an example of the functional configuration of a base station according to an embodiment of the present invention. This is a diagram showing an example of the functional configuration of a terminal according to an embodiment of the present invention. This is a diagram showing an example of the hardware configuration of a base station or terminal according to an embodiment of the present invention. This is a diagram showing an example of the configuration of a vehicle according to an embodiment of the present invention.

[0009] Embodiments of the present invention will be described below with reference to the drawings. Note that the embodiments described below are examples, and the embodiments to which the present invention is applied are not limited to those described below.

[0010] In the operation of the wireless communication system according to the embodiments of the present invention, existing technologies may be used as appropriate. Such existing technologies include, for example, existing NR or LTE, but are not limited to existing NR or LTE. Furthermore, the term "LTE" as used herein has a broad meaning that includes LTE-Advanced and LTE-Advanced and later technologies (e.g., NR), unless otherwise specified.

[0011] Furthermore, in the embodiments of the present invention described below, terms such as SS (Synchronization signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical broadcast channel), PRACH (Physical random access channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUCCH (Physical Uplink Control Channel), and PUSCH (Physical Uplink Shared Channel), which are used in existing LTE systems, will be used. This is for convenience of description, and similar signals, functions, etc., may be called by other names. Also, the above terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc. However, even if a signal is used in NR, it is not necessarily explicitly stated as "NR-".

[0012] Furthermore, in the embodiments of the present invention, the duplex system may be a TDD (Time Division Duplex) system, an FDD (Frequency Division Duplex) system, or any other system (for example, a Flexible Duplex).

[0013] Furthermore, in the embodiments of the present invention, "configuring" wireless parameters, etc., may mean that predetermined values ​​are pre-configured, or that wireless parameters notified from a base station or terminal are configured.

[0014] (System Configuration) Figure 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention. The wireless communication system according to an embodiment of the present invention includes a base station 10 and a terminal 20, as shown in Figure 1. Figure 1 shows one base station 10 and one terminal 20, but this is an example, and there may be multiple base stations 10 and terminals 20.

[0015] The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of the wireless signal are defined in the time domain and the frequency domain. The time domain may be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain may be defined by the number of subcarriers or resource blocks. In addition, the TTI (Transmission Time Interval) in the time domain may be a slot, or the TTI may be a subframe.

[0016] The base station 10 transmits synchronization signals and system information to the terminal 20. The synchronization signals are, for example, NR-PSS and NR-SSS. The system information is transmitted, for example, in NR-PBCH and is also called broadcast information. The synchronization signals and system information may also be called SSB (SS / PBCH block). As shown in Figure 1, the base station 10 transmits control signals or data to the terminal 20 via DL (Downlink) and receives control signals or data from the terminal 20 via UL (Uplink). Both the base station 10 and the terminal 20 are capable of transmitting and receiving signals using beamforming. Furthermore, both the base station 10 and the terminal 20 are capable of applying MIMO (Multiple Input Multiple Output) communication to DL or UL. In addition, both the base station 10 and the terminal 20 may communicate via secondary cells (SCell) and primary cells (PCell) using CA (Carrier Aggregation). Furthermore, terminal 20 may communicate via the primary cell of base station 10 and the primary secondary cell group cell (PSCell: Primary SCG Cell) of other base stations 10 using DC (Dual Connectivity).

[0017] Terminal 20 is a communication device equipped with wireless communication capabilities, such as a smartphone, mobile phone, tablet, wearable device, or M2M (Machine-to-Machine) communication module. As shown in Figure 1, Terminal 20 receives control signals or data from the base station 10 via DL and transmits control signals or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. Terminal 20 also receives various reference signals transmitted from the base station 10 and performs propagation path quality measurement based on the reception results of said reference signals. Terminal 20 may be referred to as UE and base station 10 as gNB.

[0018] A UE with RRC connectivity may monitor one paging opportunity per modification period. For example, it may monitor notifications of system information changes. If the active BWP has a Paging Search Space (PSS), the UE monitors the PDCCH scrambled with P-RNTI based on the configured PSS. If the active BWP does not have a PSS, the UE does not monitor paging. If the active BWP does not have a PSS, the UE may obtain system information via UL-DCCH.

[0019] Each UL-BWP can configure RACH resources for use with both contention-based and contention-free random access (see Non-Patent Document 3). For example, RACH configuration for BWPs may be notified by the information elements BWP-Uplink / BWP-UplinkCommon / RACH-ConfigCommon.

[0020] Figure 2 is a diagram illustrating an example of the operation related to BWP switching in this embodiment. As shown in Figure 2, a BWP switching delay occurs when switching from a 15 kHz SCS BWP1 to a 30 kHz SCS BWP2. For example, BWP switching may be supported as shown in the following case. Note that "switching" and "switching" may be interchangeable.

[0021] Case 1) BWP switching may be performed by RRC reconfiguration using firstActiveDownlinkBWP-Id and / or firstActiveUplinkBWP-Id.

[0022] Case 2) BWP switching may be performed upon the expiration of the BWP inactivity timer (bwp-Inactivity timer). When the UE receives DCI, it starts or resets the timer and performs DL and / or UL scheduling, or transmits and receives by CG grant scheduling. The timer is decremented by 1 at the end of a subframe (FR1) or a half-subframe (FR2). When the timer expires, the BWP is switched to "defaultDownlinkBWP-Id".

[0023] Case 3) A BWP switch may be performed by a DCI notifying the BWP switch. The BWP switch may be notified by a DCI, for example, DCI format 0_1 ​​or DCI format 1_1 having a field for "Bandwidth part indicator". The UE does not transmit or receive for a time of "slot offset" from the end of the third symbol after receiving the DCI indicating the BWP switch. The "slot offset" should be greater than or equal to the delay required for the BWP switch. The "slot offset" is the offset between the PDCCH carrying the DCI and the PDSCH or PUSCH scheduled by the DCI.

[0024] Case 4) If there are no PRACH resources configured for active UL-BWP, BWP switching for RACH may be performed.

[0025] In the above operation, a method is required to configure additional PRACH resources for BWP on the terminal, and to control the activation or deactivation of these additional PRACH resources. However, conventional methods for achieving these have not been clearly defined.

[0026] According to this embodiment, the configuration of parameters and control information (e.g., DCI) that support the adaptation of additional PRACH resources in BWP is defined.

[0027] In this embodiment, the additional PRACH resource for BWP may mean either an additional PRACH resource based on BWP or an additional PRACH resource for BWP.

[0028] The following describes examples of this embodiment. Each embodiment may be performed independently, or multiple arbitrary embodiments may be combined and performed.

[0029] (Example 1) According to Example 1, the parameters for the additional PRACH resource of BWP are defined.

[0030] According to Example 1-1, in the RRC_IDLE / RRC_INACTIVE state, additional PRACH resource parameters may be instructed to terminal 20.

[0031] As shown in Figure 3, in step S101, terminal 20 is in the RRC_IDLE / RRC_INACTIVE state. In step S102, base station 10 sends an SIB (System Information Block) or RRC signaling containing the parameters of an additional PRACH resource to terminal 20. The SIB may be, for example, SIB1, another existing SIB type, or a new SIB type. The RRC signaling may be signaling in an RRC release. In step S103, terminal 20 sets the parameters of the received additional PRACH resource on the terminal.

[0032] According to Example 1-2, as shown in Figure 4, in step S201, terminal 20 is in the RRC_CONNECTED state, and then in step S202, base station 10 transmits parameters for an additional PRACH resource, which are set based on one of the following Alt.1-1 to Alt.1-4, to terminal 20. In step S203, terminal 20 sets the received parameters for the additional PRACH resource on the terminal.

[0033] Alt.1-1: The parameters of the additional PRACH resource may be separate parameters for each BWP and / or active BWP. That is, the parameters of the additional PRACH resource may be parameters that are set independently for each BWP and / or active BWP. For example, different parameters for the additional PRACH resource may be set for different BWPs.

[0034] Alt.1-2: The parameters for additional PRACH resources may be common to all BWPs and / or configured BWPs. For example, all BWPs may have the same additional PRACH resource parameters. The frequency position and / or start frequency of the additional PRACH resource for each BWP may be specified by the parameter msg1-FrequencyStartOffset-r19, based on an offset to PRB0 or ​​an offset to the start / middle / last PRB of the BWP. msg1-FrequencyStartOffset-r19 may be used to determine the start RB of the additional PRACH resource for each BWP.

[0035] Alt.1-3: Some parameters of the additional PRACH resource may be individual parameters for each BWP and / or active BWP, while other parameters may be common to all BWPs and / or configured BWPs. For example, the PRACH time setting (prach-ConfigurationIndex) may be common to all BWPs, while the starting frequency (msg1-FrequencyStart) may be different for each BWP.

[0036] Alt.1-4: The parameters of additional PRACH resources may be set based on at least one of Alt.1-1, Alt.1-2, or Alt.1-3.

[0037] In the above embodiments 1-1 and 1-2, the parameters of the additional PRACH resource in the RRC_IDLE state may be reused for the initial UL BWP and / or UL BWP0.

[0038] In the above embodiments 1-1 and 1-2, if no additional PRACH resource parameters are provided for the initial UL BWP and / or UL BWP0 in the RRC_CONNECTED state, terminal 20 may use the additional PRACH resource parameters provided in the RRC_IDLE / RRC_INACTIVE state for the initial UL BWP and / or UL BWP0 in the RRC_CONNECTED state.

[0039] In the above embodiments 1-1 and 1-2, if additional PRACH resource parameters are provided for the initial UL BWP and / or UL BWP0 in the RRC_CONNECTED state, terminal 20 may use these parameters for the initial UL BWP and / or UL BWP0 in the RRC_CONNECTED state.

[0040] Example 1-3 clarifies the behavior of terminal 20 when the BWP legacy PRACH resource is not configured for terminal 20 while it is in the RRC_CONNECTED state. As shown in Figure 5, in step S301, terminal 20 is in the RRC_CONNECTED state. In step S302, if the BWP legacy PRACH resource is not configured for terminal 20, the following actions based on Alt.2-1 or Alt.2-2 may be performed.

[0041] Alt.2-1: Terminal 20 may be assumed to have no additional PRACH resources configured for BWP.

[0042] Alt.2-2: If additional PRACH resources are configured based on any of Alt.1-1 to Alt.1-4 in Example 1-2, terminal 20 may assume the following Alt.2-2-1 or Alt.2-2-2.

[0043] Alt.2-2-1: Terminal 20 may be assumed to lack the BWP PRACH resource.

[0044] Alt.2-2-2: Terminal 20 may assume that an additional PRACH resource is configured in BWP.

[0045] As an example of Alt.2-2-2, the terminal 20 may assume that the additional PRACH resource is always enabled. That is, the terminal 20 can always use the additional PRACH resource of the BWP.

[0046] As an example of Alt.2-2-2, the terminal 20 may assume that the additional PRACH resource can be enabled or disabled. For example, when the additional PRACH resource is invalid, it means that there is no PRACH resource for the BWP.

[0047] In Embodiment 1-4, in the RRC_CONNECTED state, the operation of the terminal 20 when no additional PRACH resource is set for the BWP is clarified. As shown in FIG. 6, in step S401, the terminal 20 is in the RRC_CONNECTED state. In step S402, when no legacy PRACH resource of the BWP is set for the terminal 20, the operation based on the following Alt.3-1 or Alt.3-2 may be executed.

[0048] Alt.3-1: The terminal 20 may assume that no additional PRACH resource is supported for the BWP. For example, the terminal 20 may assume that no DCI or signaling for instructing the enabling or disabling of the additional PRACH resource for the BWP is transmitted. For example, the terminal 20 may not even attempt to detect the signaling for instructing the enabling or disabling of the additional PRACH resource for the BWP.

[0049] Alt.3-2: The terminal 20 may determine the additional PRACH resource for the BWP using the parameters of the additional PRACH setting for [initial BWP / initial UL BWP / specific BWP].

[0050] (Embodiment 2) According to Embodiment 2, a DCI for supporting the adaptation of the additional PRACH resource of the BWP may be defined.

[0051] As shown in Figure 7, in step S501, terminal 20 is in the RRC_CONNECTED state. In step S502, base station 10 sends a DCI to terminal 20 instructing it to enable or disable an additional PRACH resource. The DCI that instructs the enabling or disabling of an additional PRACH resource in the RRC_CONNECTED state may be a DCI other than the paging DCI. In the following description of the embodiment, a DCI other than the paging DCI that instructs the enabling or disabling of an additional PRACH resource in the RRC_CONNECTED state will be referred to as "other DCI".

[0052] In step S503, in controlling the activation or deactivation of additional PRACH resources in the RRC_CONNECTED state, terminal 20 may perform an action based on any of the following Alt.1 to Alt.4. Then, in step S504, terminal 20 activates or deactivates the additional PRACH resources based on the received DCI (other DCI) through monitoring.

[0053] Alt.1: Terminal 20 may monitor only the paging DCI when in the RRC_CONNECTED state.

[0054] Alt.2: Terminal 20 may monitor only other DCIs while in the RRC_CONNECTED state.

[0055] Alt.3: Terminal 20 may monitor both the paging DCI and other DCIs in the RRC_CONNECTED state.

[0056] Alt.3-1: Terminal 20 does not need to monitor both the paging DCI and other DCIs in a single BWP. For example, terminal 20 may monitor either the paging DCI or only one of the other DCIs in a single BWP. For example, terminal 20 may monitor the paging DCI in the initial BWP and other DCIs in other BWPs.

[0057] Alt.3-2: Terminal 20 may monitor both the paging DCI and other DCIs in one BWP. For example, terminal 20 may monitor both the paging DCI and other DCIs in the initial BWP, and monitor other DCIs in other BWPs.

[0058] Alt.4: Terminal 20 may monitor DCI based on one or more combinations of Alt.1 to Alt.3 (including Alt.3-1 and 3-2) in accordance with the settings of base station 10.

[0059] For example, terminal 20 may be configured to monitor only other DCIs in all BWPs.

[0060] For example, terminal 20 may be configured to monitor both the paging DCI and other DCIs in all BWPs.

[0061] For example, terminal 20 may be configured to monitor the paging DCI in the initial BWP and monitor other DCIs in other BWPs.

[0062] For example, terminal 20 may be configured to monitor the paging DCI in the initial BWP and to monitor both the paging DCI and other DCIs in other BWPs.

[0063] According to Example 3, the terminal 20 may have the capabilities related to Examples 1 and 2 as terminal capabilities and report these terminal capabilities to the base station 10.

[0064] The terminal capabilities reported by terminal 20 may include at least one of the following: whether the operations shown in Examples 1 and 2 (including each Alt. X) are executable (supported), or whether combinations of the operations shown in Examples 1 and 2 are possible.

[0065] Terminal 20 may report the above terminal capabilities for each frequency. Terminal capabilities may be reported, for example, for each terminal (UE), for each FR1, FR2, FR2-1, FR2-2, FR3 or SCS, for each band, for each BC (Band Combination), for each FC or FSPC, or at least one of these.

[0066] Terminal 20 may report the above terminal capabilities for each cell. Terminal capabilities may be reported, for example, for each terminal (UE), for each cell, or for each TDD and FDD, or for at least one of these.

[0067] According to a modified version of this embodiment, the terminal 20 may receive at least one of the following from the network (e.g., base station 10): information via upper-layer signaling (e.g., RRC messages or LPP messages), MAC CE, or DCI.

[0068] A MAC CE may be a MAC CE that includes a new LCID in its subheader, or it may be a new MAC CE that is an extension of an existing MAC CE (for example, a MAC CE that introduces a new octet).

[0069] The DCI fields in DCI may be existing DCI fields or newly introduced DCI fields. The DCI may be a DCI with CRC scrambled by an existing RNTI or a newly introduced RNTI. The DCI format may be an existing DCI format or a newly introduced DCI format.

[0070] According to a modified version of this embodiment, the terminal 20 may receive information from the network periodically, semi-permanently, or aperiodically. The trigger for receiving information semi-permanently or aperiodically may be based on instructions from the terminal 20 or the base station 10.

[0071] According to the embodiment described above, additional PRACH resources for BWP can be configured on the terminal, and the enabling or disabling of these additional PRACH resources can be controlled. This allows the terminal to properly perform communication using the additional PRACH resources for BWP.

[0072] (Device Configuration) Next, an example of the functional configuration of the base station 10 and terminal 20 that perform the processes and operations described above will be explained. The base station 10 and terminal 20 include functions to perform the embodiments described above. However, the base station 10 and terminal 20 may each be equipped with only one of the proposed functions from the embodiments.

[0073] <Base Station 10> Figure 8 is a diagram showing an example of the functional configuration of a base station. As shown in Figure 8, the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in Figure 8 is merely an example. Any functional classification and name of the functional unit may be used as long as it can perform the operations according to the embodiment of the present invention. The transmitting unit 110 and the receiving unit 120 may be called the communication unit.

[0074] The transmitting unit 110 includes the function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly. The receiving unit 120 includes the function of receiving various signals transmitted from the terminal 20 and obtaining information from the received signals, for example, information of a higher layer. The transmitting unit 110 also has the function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, DL data, etc. to the terminal 20. The transmitting unit 110 also transmits setting information, etc., as described in the embodiment.

[0075] The setting unit 130 stores pre-configured setting information and various setting information to be transmitted to the terminal 20 in a storage device and reads it from the storage device as needed. The control unit 140 performs control of the entire base station 10, including control related to signal transmission and reception. The signal transmission function unit of the control unit 140 may be included in the transmission unit 110, and the signal reception function unit of the control unit 140 may be included in the reception unit 120. The transmission unit 110 and the reception unit 120 may also be called the transmitter and receiver, respectively.

[0076] <Terminal 20> Figure 9 is a diagram showing an example of the functional configuration of a terminal. As shown in Figure 9, terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in Figure 9 is merely an example. Any functional classification and name of functional unit is acceptable as long as it can perform the operations according to the embodiment of the present invention. The transmitting unit 210 and the receiving unit 220 may be called the communication unit.

[0077] The transmitting unit 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly. The receiving unit 220 wirelessly receives various signals and obtains signals from higher layers from the received physical layer signals. The transmitting unit 210 also transmits HARQ-ACK, and the receiving unit 220 receives the setting information and the like as described in the embodiment.

[0078] The setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220 in a storage device and reads it from the storage device as needed. The setting unit 230 also stores pre-set setting information. The control unit 240 controls the entire terminal 20, including control related to signal transmission and reception. The signal transmission function in the control unit 240 may be included in the transmission unit 210, and the signal reception function in the control unit 240 may be included in the reception unit 220. The transmission unit 210 and the reception unit 220 may also be called the transmitter and receiver, respectively.

[0079] The terminal or base station of this embodiment may be configured as one of the terminals or base stations described in the following sections. Furthermore, the following communication methods may be implemented.

[0080] <Configuration relating to this embodiment> (Note 1) A terminal comprising: a receiving unit that receives information including parameters of an additional PRACH (Physical random access channel) resource from a base station; and a control unit that sets the received parameters of the additional PRACH resource to the terminal. (Note 2) The terminal according to Note 1, wherein the terminal is in the RRC (Radio Resource Control)_IDLE state or the RRC_INACTIVE state, and the information is a signaling in a system information block or RRC release. (Note 3) The terminal according to Note 1, wherein the terminal is in the RRC_CONNECTED state, and the parameters of the additional PRACH resource are parameters set individually for each BWP or parameters set commonly for all BWPs. (Note 4) The terminal as described in Note 1, wherein if the terminal is in the RRC_CONNECTED state and no parameters for additional PRACH resources for the initial UL (Uplink) BWP have been provided to the terminal, the control unit uses the parameters for additional PRACH resources provided in the RRC_IDLE or RRC_INACTIVE state for the initial UL BWP in the RRC_CONNECTED state. (Note 5) The terminal as described in Note 1, wherein the terminal is in the RRC_CONNECTED state, the receiving unit receives predetermined downlink control information from the base station instructing the activation or deactivation of additional PRACH resources, the control unit controls the activation or deactivation of the additional PRACH resources based on the predetermined downlink control information, and the predetermined downlink control information is different from paging downlink control information. (Appendix 6) A communication method performed by a terminal, comprising the steps of: receiving information from a base station that includes parameters for an additional PRACH (Physical random access channel) resource; and setting the parameters for the received additional PRACH resource on the terminal.

[0081] In any of the above configurations, additional PRACH resources for BWP can be configured on the terminal, and the enabling or disabling of these additional PRACH resources can be controlled. This allows the terminal to properly perform communication using the additional PRACH resources of BWP.

[0082] (Hardware Configuration) The block diagrams (Figures 8 and 9) used in the description of the above embodiments show functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one device that is physically or logically coupled, or it may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wired or wireless connections). A functional block may be realized by combining the above one device or the above multiple devices with software.

[0083] Functions include, but are not limited to, judgment, decision, determination, calculation, calculation, processing, derivation, investigation, exploration, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, assumption, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating (mapping), and assigning. For example, a functional block (configuration part) that enables transmission is called a transmitting unit or transmitter. In all cases, as mentioned above, the method of implementation is not particularly limited.

[0084] For example, the base station 10, terminal 20, etc. in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure. Figure 10 is a diagram showing an example of the hardware configuration of the base station 10 and terminal 20 according to one embodiment of the present disclosure. The above-mentioned base station 10 and terminal 20 may be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0085] In the following explanation, the term "device" can be read as "circuit," "device," "unit," etc. The hardware configuration of the base station 10 and terminal 20 may include one or more of the devices shown in the figure, or it may be configured without some of the devices.

[0086] Each function in the base station 10 and terminal 20 is realized by loading predetermined software (programs) onto hardware such as the processor 1001 and storage device 1002, which allows the processor 1001 to perform calculations, control communication by the communication device 1004, and control at least one of data reading and writing in the storage device 1002 and auxiliary storage device 1003.

[0087] The processor 1001 controls the entire computer, for example, by running an operating system. The processor 1001 may consist of a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic units, registers, etc. For example, the control unit 140, control unit 240, etc., described above may be implemented by the processor 1001.

[0088] Furthermore, the processor 1001 reads programs (program code), software modules, or data from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes accordingly. The program used is one that causes the computer to execute at least a part of the operations described in the above embodiment. For example, the control unit 140 of the base station 10 shown in Figure 8 may be implemented by a control program stored in the storage device 1002 and operated by the processor 1001. Also, for example, the control unit 240 of the terminal 20 shown in Figure 9 may be implemented by a control program stored in the storage device 1002 and operated by the processor 1001. Although the above-described processes have been explained 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 program may also be transmitted from the network via a telecommunications line.

[0089] The storage device 1002 is a computer-readable recording medium and may consist of at least one of the following: ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. The storage device 1002 may also be called a register, cache, main memory, etc. The storage device 1002 can store executable programs (program code), software modules, etc., for implementing a communication method according to one embodiment of the present disclosure.

[0090] The auxiliary storage device 1003 is a computer-readable recording medium and may consist of at least one of the following: an optical disc 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 multipurpose disk, a Blu-ray® disk), a smart card, flash memory (e.g., a card, a stick, a key drive), a floppy® disk, a magnetic strip, etc. The above-mentioned storage medium may also be a database, server, or other suitable medium that includes at least one of the storage device 1002 and the auxiliary storage device 1003.

[0091] The communication device 1004 is hardware (transmitting / receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, network controller, network card, communication module, etc. The communication device 1004 may be configured to include, for example, a high-frequency switch, duplexer, filter, frequency synthesizer, etc., in order to implement at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the transmitting and receiving antenna, amplifier section, transmitting and receiving section, transmission path interface, etc., may be implemented by the communication device 1004. The transmitting and receiving section may be implemented in a physically or logically separated manner, with a transmitting section and a receiving section.

[0092] The input device 1005 is an input device that accepts input from an external source (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to an external source (e.g., a display, speaker, LED lamp, etc.). The input device 1005 and the output device 1006 may be configured as an integrated unit (e.g., a touch panel).

[0093] Furthermore, each device, such as the processor 1001 and the storage device 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or different buses may be configured for each device.

[0094] Furthermore, the base station 10 and terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array), and some or all of each functional block may be realized by such hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0095] Figure 11 shows an example of the configuration of vehicle 2001. As shown in Figure 11, 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 this disclosure may be applied to a communication device mounted on vehicle 2001, for example, to the communication module 2013.

[0096] The drive unit 2002 consists of, for example, 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, which is operated by the user.

[0097] The electronic control unit 2010 consists of a microprocessor 2031, memory (ROM, RAM) 2032, and communication ports (IO ports) 2033. Signals from various sensors 2021 to 2029 installed in the vehicle 2001 are input to the electronic control unit 2010. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0098] Signals from various sensors 2021 to 2029 include current signals from current sensor 2021 for sensing motor current, front and rear wheel rotation speed signals acquired by rotation speed sensor 2022, front and rear wheel air pressure signals acquired by air pressure sensor 2023, vehicle speed signals acquired by vehicle speed sensor 2024, acceleration signals acquired by acceleration sensor 2025, accelerator pedal depression signals acquired by accelerator pedal sensor 2029, brake pedal depression signals acquired by brake pedal sensor 2026, shift lever operation signals acquired by shift lever sensor 2027, and detection signals acquired by object detection sensor 2028 for detecting obstacles, vehicles, pedestrians, etc.

[0099] The Information Services Unit 2012 consists of various devices for providing various types of information, such as driving information, traffic information, and entertainment information, including a car navigation system, audio system, speakers, television, and radio, and one or more ECUs that control these devices. The Information Services Unit 2012 uses information acquired from external devices via a communication module 2013, etc., to provide various multimedia information and multimedia services to the occupants of the vehicle 2001.

[0100] The driver assistance system unit 2030 consists of various devices that provide functions to prevent accidents or reduce the driver's workload, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning locators (e.g., GNSS), map information (e.g., high-definition (HD) maps, autonomous vehicle (AV) maps), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System)), AI (Artificial Intelligence) chips, and AI processors, as well as one or more ECUs that control these devices. The driver assistance system unit 2030 also transmits and receives various information via the communication module 2013 to realize driver assistance functions or autonomous driving functions.

[0101] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via its communication port. For example, the communication module 2013 sends and receives data via the communication port 2033 between the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, the microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021-29 provided in the vehicle 2001.

[0102] 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 external devices. For example, it can send and receive various types of information with external devices 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 or a mobile station.

[0103] The communication module 2013 transmits current signals from current sensors input to the electronic control unit 2010 to an external device via wireless communication. The communication module 2013 also transmits, via wireless communication, the following signals input to the electronic control unit 2010: front and rear wheel rotation speed signals acquired by the rotation speed sensor 2022, front and rear wheel air pressure signals acquired by the air pressure sensor 2023, vehicle speed signals acquired by the vehicle speed sensor 2024, acceleration signals acquired by the acceleration sensor 2025, accelerator pedal depression amount signals acquired by the accelerator pedal sensor 2029, brake pedal depression amount signals acquired by the brake pedal sensor 2026, shift lever operation signals acquired by the shift lever sensor 2027, and detection signals for detecting obstacles, vehicles, pedestrians, etc., acquired by the object detection sensor 2028.

[0104] The communication module 2013 receives various information (traffic information, signal information, vehicle-to-vehicle information, etc.) transmitted from an external device and displays it on the information service unit 2012 provided in the vehicle 2001. The communication module 2013 also stores the various information received from the external device 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, axles 2009, sensors 2021-2029, etc., provided in the vehicle 2001.

[0105] (Supplement to Embodiments) Embodiments of the present invention have been described above, but the disclosed invention is not limited to such embodiments, and those skilled in the art will understand various modifications, alterations, alternatives, substitutions, etc. Specific numerical examples have been used to facilitate understanding of the invention, but unless otherwise specified, these numerical values ​​are merely examples, and any appropriate values ​​may be used. The division of items in the above description is not essential to the present invention, and matters described in two or more items may be combined as needed, and matters described in one item may be applied to matters described in another item (as long as they do not contradict each other). The boundaries of functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical parts. The operation of multiple functional units may be physically performed by one part, or the operation of one functional unit may be physically performed by multiple parts. The processing procedures described in the embodiments may be rearranged as long as they do not contradict each other. For the convenience of explaining the processing, the base station 10 and terminal 20 have been described using functional block diagrams, but such devices may be realized in hardware, software, or a combination thereof. The software operated by the processor of the base station 10 according to an embodiment of the present invention and the software operated by the processor of the terminal 20 according to an embodiment of the present invention may be stored in any suitable storage medium such as random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server, etc.

[0106] Furthermore, notification of information is not limited to the embodiments described herein and may be carried out by other means. For example, notification of information may be carried out by physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or combinations thereof. Also, RRC signaling may be called RRC messages, and may be, for example, RRC Connection Setup messages, RRC Connection Reconfiguration messages, etc.

[0107] Each aspect / embodiment described in this disclosure refers to LTE (Long Term Evolution), LTE-A (LTE-Advanced), 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 (where x is, for example, an integer or 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 802.20 may apply to at least one system utilizing UWB (Ultra-WideBand), Bluetooth®, or other appropriate systems, and to next-generation systems extended, modified, created, or defined based thereon. Alternatively, multiple systems may be applied in combination (e.g., a combination of at least one of LTE and LTE-A with 5G).

[0108] The processing procedures, sequences, flowcharts, etc., of each aspect / embodiment described herein may be reordered, provided they are consistent with each other. For example, the methods described herein present various step elements in an exemplary order and are not limited to that specific order.

[0109] In this specification, specific operations performed by the base station 10 may, in some cases, be performed by its upper node. In a network consisting of one or more network nodes having a base station 10, it is clear that various operations performed for communication with the terminal 20 can be performed by the base station 10 and at least one of the other network nodes (for example, an MME or S-GW, but not limited to these). Although the above example illustrates the case where there is one other network node besides the base station 10, the other network node may be a combination of multiple other network nodes (for example, an MME and an S-GW).

[0110] The information or signals described in this disclosure may be output from a higher layer (or lower layer) to a lower layer (or higher layer). They may also be input and output via multiple network nodes.

[0111] Input and output information may be stored in a specific location (e.g., memory) or managed using a management table. Input and output information may be overwritten, updated, or appended to. Output information may be deleted. Input information may be transmitted to other devices.

[0112] The determination in this disclosure may be made by a value represented by one bit (0 or 1), by a Boolean value (true or false), or by a numerical comparison (for example, a comparison with a predetermined value).

[0113] Software should be broadly interpreted to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, and so on, whether they are called software, firmware, middleware, microcode, hardware description languages, or by any other name.

[0114] Furthermore, software, instructions, information, etc., may be transmitted and received via a transmission medium. For example, if software is transmitted from a website, server, or other remote source using at least one of wired technology (such as coaxial cable, fiber optic cable, twisted pair, or digital subscriber line (DSL)) and wireless technology (such as infrared or microwave), then at least one of these wired and wireless technologies is included in the definition of a transmission medium.

[0115] The information, signals, etc. described in this disclosure may be represented using any of the various different techniques. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0116] In addition, terms used 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 the channel and symbol may be a signal (signaling). Also, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, cell, frequency carrier, etc.

[0117] The terms “system” and “network” as used in this disclosure are interchangeable.

[0118] Furthermore, the information, parameters, etc., described in this disclosure may be expressed using absolute values, relative values ​​from a given value, or other corresponding information. For example, wireless resources may be indicated by an index.

[0119] The names used for the parameters described above are not restrictive in any way. Furthermore, the formulas and other expressions using these parameters may differ from those expressly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, and therefore, the various names assigned to these various channels and information elements are not restrictive in any way.

[0120] In this disclosure, terms such as "Base Station (BS)", "wireless base station", "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.

[0121] A base station can accommodate one or more (e.g., three) cells. If a base station accommodates multiple cells, the entire coverage area of ​​the base station can be divided into multiple smaller areas, each of which may 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 all of the coverage area of ​​at least one of the base station and / or base station subsystems that provide communication services in that coverage.

[0122] In this disclosure, terms such as "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" may be used interchangeably.

[0123] 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 several other appropriate terms.

[0124] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile body, the mobile body itself, etc. The mobile body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile body (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 operation. 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.

[0125] Furthermore, the term "base station" in this disclosure may be interpreted as "user terminal." For example, the various aspects / embodiments of this disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple terminals 20 (which may be called, for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.). In this case, the terminals 20 may have the functions that the base station 10 has. Also, terms such as "uplink" and "downlink" may be interpreted as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, uplink channel, downlink channel, etc., may be interpreted as side channel.

[0126] Similarly, the term "user terminal" in this disclosure may be replaced with "base station." In this case, the base station may be configured to have the same functions as the user terminal described above.

[0127] As used in this disclosure, the terms “determining” and “determining” may encompass a wide variety of actions. “Determining” may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, or inquiring (e.g., searching in a table, database, or other data structure), or ascertaining. “Determining” may also include receiving (e.g., receiving information), transmitting (e.g., sending information), inputting, outputting, or accessing (e.g., accessing data in memory). Furthermore, "judgment" and "decision" can include considering something as having been "judged" or "decided" after resolving, selecting, choosing, establishing, comparing, etc. In other words, "judgment" and "decision" can include considering something as having been "judged" or "decided" after some action. Also, "judgment (decision)" can be reinterpreted as "assuming," "expecting," or "considering."

[0128] The terms “connected,” “coupled,” or any variation thereof, mean 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” with each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, “connection” may be reinterpreted as “access.” As used in this disclosure, two elements may be considered to be “connected” or “coupled” with each other using at least one of one or more wires, cables, and printed electrical connections, and, in some non-limiting and non-exclusive examples, electromagnetic energy having wavelengths in the radio frequency domain, microwave domain, and optical (both visible and invisible) domain.

[0129] The reference signal can also be abbreviated as RS (Reference Signal), and may be called a pilot depending on the applicable standard.

[0130] In this disclosure, the phrase "based on" does not mean "based solely on" unless otherwise specified. In other words, the phrase "based on" means both "based solely on" and "based at least on."

[0131] Any reference to elements using the designations “first,” “second,” etc., as 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 way to distinguish between two or more elements. Accordingly, references to the first and second elements do not imply that only two elements may be employed, or that the first element must precede the second element in any way.

[0132] In the configuration of each of the above devices, "means" may be replaced with "part," "circuit," "device," etc.

[0133] Where the terms “include,” “including,” and variations thereof are used in this disclosure, these terms are intended to be inclusive, as is the term “comprising.” Furthermore, the term “or” as used in this disclosure is not intended to mean exclusive OR.

[0134] A wireless frame may consist of one or more frames in the time domain. Each of these frames in the time domain may be called a subframe. A subframe may further consist 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.

[0135] Numerical logic may be communication parameters applied to at least one of the transmission and reception of a signal or channel. Numerical logic may include, for example, at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, specific filtering processes performed by the transceiver in the frequency domain, and specific windowing processes performed by the transceiver in the time domain.

[0136] A slot may consist of one or more symbols in the time domain (such as OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.). A slot may also be a time unit based on neurologic.

[0137] A slot may include multiple minislots. Each minislot may consist of one or more symbols in the time domain. Minislots may also be called subslots. Minislots may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called a PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called a PDSCH (or PUSCH) mapping type B.

[0138] Wireless frames, subframes, slots, minislots, and symbols all represent units of time when transmitting a signal. Different names may be used for each of these terms.

[0139] 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. In other words, at least one of a subframe and a TTI may be a subframe in existing LTE (1 ms), a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.

[0140] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, the base station schedules each terminal 20 to allocate wireless resources (such as the frequency bandwidth and transmission power available to each terminal 20) in TTI units. However, the definition of TTI is not limited to this.

[0141] TTI may be a transmission time unit for channel-encoded data packets (transport blocks), code blocks, code words, etc., or it may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the actual time interval (e.g., number of symbols) in which the transport block, code block, code word, etc. are mapped may be shorter than the TTI.

[0142] Furthermore, if one slot or one mini-slot is referred to as a TTI, then one or more TTIs (i.e., one or more slots or one or more mini-slots) may constitute the minimum time unit for scheduling. In addition, the number of slots (number of mini-slots) that constitute this minimum time unit for scheduling may be controlled.

[0143] A TTI with a time length of 1 ms may be called a normal TTI, a long TTI, a normal subframe, a long subframe, a slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini slot, a sub slot, a slot, etc.

[0144] Furthermore, long TTIs (e.g., normal TTIs, subframes, etc.) may be interpreted as TTIs with a time length exceeding 1 ms, and short TTIs (e.g., shortened TTIs, etc.) may be interpreted as TTIs with a TTI length less than that of a long TTI but 1 ms or more.

[0145] A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and in the frequency domain, it may contain one or more consecutive subcarriers. The number of subcarriers in an RB may be the same regardless of the neurology, for example, 12. The number of subcarriers in an RB may be determined based on the neurology.

[0146] Furthermore, the time domain of the RB may contain one or more symbols and may be the length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc., may each consist of one or more resource blocks.

[0147] One or more RBs may also be called a Physical RB (PRB), Sub-Carrier Group (SCG), Resource Element Group (REG), PRB pair, RB pair, etc.

[0148] Furthermore, a resource block may consist of one or more resource elements (REs). For example, one RE may be a radio resource area comprising one subcarrier and one symbol.

[0149] A Bandwidth Part (BWP), also known as a partial bandwidth, may represent a subset of consecutive common resource blocks (RBs) for a particular neurology in a given carrier. These common RBs may be identified by an index of the RBs relative to a common reference point of the carrier. The PRBs may be defined and numbered within a BWP.

[0150] A 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 terminal 20 within a single carrier.

[0151] At least one of the configured BWPs may be active, and terminal 20 does not need to be expected to send or receive a predetermined signal / channel outside of the active BWP. In this disclosure, terms such as "cell" and "carrier" may be read as "BWP".

[0152] The structures described above, such as wireless frames, subframes, slots, minislots, and symbols, are merely illustrative. For example, the number of subframes included in a wireless frame, the number of slots per subframe or wireless 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, and the number of symbols, symbol length, and cyclic prefix (CP) length within a TTI can be varied in various ways.

[0153] In this disclosure, if articles are added through translation, such as a, an, and the in English, this disclosure may include the fact that the noun following these articles is plural.

[0154] In this 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 "combine" may be interpreted similarly to "different."

[0155] Each aspect / embodiment described herein may be used individually, in combination, or switched between as needed during implementation. Furthermore, notification of specific information (e.g., notification that "X is X") is not limited to explicit notification, but may also be implicit (e.g., by not providing such notification).

[0156] Although the present disclosure has been described in detail above, it will be 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 intent and scope of the present disclosure as defined by the claims. Therefore, the descriptions in the present disclosure are illustrative and not intended to be restrictive in any way.

[0157] This patent application claims priority based on Japanese Patent Application No. 2025-025273, filed on 19 February 2025, and the entire contents of Japanese Patent Application No. 2025-025273 are incorporated herein by reference.

[0158] 10 Base station 110 Transmitting unit 120 Receiving unit 130 Setting unit 140 Control unit 20 Terminal 210 Transmitting unit 220 Receiving unit 230 Setting unit 240 Control unit 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device 2001 Vehicle 2002 Drive unit 2003 Steering unit 2004 Accelerator pedal 2005 Brake pedal 2006 Shift lever 2007 Front wheel 2008 Rear wheel 2009 Axle 2010 Electronic control unit 2012 Information service unit 2013 Communication module 2021 Current sensor 2022 Rotation speed 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 Driver assistance system unit 2031 Microprocessor 2032 Memory (ROM, RAM) 2033 Communication port (I / O port)

Claims

1. A terminal comprising: a receiving unit that receives information including parameters for an additional PRACH (Physical Random Access Channel) resource from a base station; and a control unit that sets the parameters of the received additional PRACH resource in the terminal.

2. The terminal according to claim 1, wherein the terminal is in the RRC (Radio Resource Control)_IDLE state or the RRC_INACTIVE state, and the information is a system information block or signaling in an RRC release.

3. The terminal according to claim 1, wherein the terminal is in the RRC_CONNECTED state, and the parameters of the additional PRACH resource are parameters set individually for each BWP or parameters set in common for all BWPs.

4. The terminal according to claim 1, wherein if the terminal is in the RRC_CONNECTED state and no additional PRACH resource parameters for the initial UL (Uplink) BWP have been provided to the terminal, the control unit uses the additional PRACH resource parameters provided in the RRC_IDLE or RRC_INACTIVE state for the initial UL BWP in the RRC_CONNECTED state.

5. The terminal according to claim 1, wherein the terminal is in the RRC_CONNECTED state, the receiving unit receives predetermined downlink control information from the base station instructing the activation or deactivation of additional PRACH resources, the control unit controls the activation or deactivation of the additional PRACH resources based on the predetermined downlink control information, and the predetermined downlink control information is different from paging downlink control information.

6. A communication method performed by a terminal, comprising the steps of: receiving information from a base station that includes parameters for an additional PRACH (Physical Random Access Channel) resource; and setting the parameters for the received additional PRACH resource on the terminal.

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