Terminal and communication method

Abstract

A terminal is provided with: a control unit that determines a maximum transmission power to be applied to a certain frequency range including a plurality of frequency bands, and determines a transmission power on the basis of the maximum transmission power; and a communication unit that performs transmission in which the transmission power is applied in the certain frequency range, and the control unit determines the maximum transmission power to be applied in the certain frequency range on the basis of the other frequency ranges that are used simultaneously.

Description

TECHNICAL FIELD

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

[0002] In the 3GPP (registered trademark) (3rd Generation Partnership Project), in order to achieve further large capacity of system capacity, further high speed of data transmission speed, further low delay in a wireless interval, and the like, research on a wireless communication system (hereinafter, referred to as "NR") called 5G or NR (New Radio) is being conducted. In 5G, in order to meet the requirement conditions of achieving a throughput of 10 Gbps or more and making the delay in the wireless interval 1 ms or less, research on various wireless technologies and network architectures is being conducted (for example, Non-Patent Literature 1 and Non-Patent Literature 2).

[0003] In addition, various requirements for the next generation of 6G are further being researched. For example, the requirements are ultra broadband communication, mission critical communication, ultra massive connection, universal coverage, intelligent connection, ubiquitous sensing, and the like.

[0004] In order to achieve the requirements, as a new concept, extensibility (for example, more efficient use in the future), customizability (for example, easier to use), and sustainability (for example, cost reduction and more robust structure) are targeted.

[0005] Prior Art Documents

[0006] Non-Patent Literature

[0007] Non-Patent Literature 1: 3GPP TS 38.300 V17.5.0 (2023-06)

[0008] Non-Patent Literature 2: 3GPP TS 38.401 V17.5.0 (2023-06)

[0009] Non-Patent Literature 3: 3GPP TS 38.331 V17.5.0 (2023-06) SUMMARY

[0010] Problem to be solved by the Invention

[0011] In 5G, as a frequency band (Frequency Range: FR), FR1 and FR2 are defined. FR1 and FR2 are separate frequency bands, and it is assumed that the RF device of the UE is implemented independently. In FR1 and FR2, the transmission power control of the UE is performed independently. On the other hand, in the next generation of 6G, it is assumed that FR3, which is a frequency band between FR1 and FR2, is used. Therefore, since FR1, FR3, and FR2 are configured as continuous frequency bands, the implementation of the RF device can change. Therefore, it is necessary to specify how to perform the transmission power control.

[0012] The present invention was made in view of the above-described problems, and aims to perform transmission power control corresponding to a frequency band in a wireless communication system.

[0013] Means for Solving the Problem

[0014] According to the disclosed technology, a terminal is provided, which has a control section that decides a maximum transmission power applied to a certain frequency range including a plurality of frequency bands, and decides a transmission power based on the maximum transmission power, and a communication section that performs transmission applying the transmission power in the certain frequency range, the control section deciding the maximum transmission power applied to the certain frequency range based on other frequency ranges used at the same time.

[0015] Effects of the Invention

[0016] According to the disclosed technology, in a wireless communication system, it is possible to perform transmission power control corresponding to a frequency band. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a diagram showing an example of the structure of a wireless communication system in an embodiment of the present invention.

[0018] Figure 2 is a diagram for explaining an example (1) of a frequency band in an embodiment of the present invention.

[0019] Figure 3 is a flowchart for explaining an example of transmission power control in an embodiment of the present invention.

[0020] Figure 4 is a diagram for explaining an example (2) of a frequency band in an embodiment of the present invention.

[0021] Figure 5 is a diagram showing an example of the functional structure of a base station 10 in an embodiment of the present invention.

[0022] Figure 6 is a diagram showing an example of a functional configuration of the terminal 20 in the embodiment of the present application.

[0023] Figure 7 is a diagram showing an example of a hardware configuration of the base station 10 or the terminal 20 in the embodiment of the present application.

[0024] Figure 8 is a diagram showing an example of a configuration of the vehicle 2001 in the embodiment of the present application. DETAILED DESCRIPTION

[0025] Hereinafter, an embodiment of the present application will be described with reference to the drawings. Note that the embodiment described below is merely an example, and the embodiment to which the present application is applied is not limited to the embodiment described below.

[0026] In the operation of the wireless communication system in the embodiment of the present application, a related art is appropriately used. The related art is, for example, the existing LTE, but is not limited to the existing LTE. Further, unless otherwise specified, the term "LTE" used in this specification has a broad meaning including LTE-Advanced and a manner (for example, NR) later than LTE-Advanced.

[0027] Further, in the embodiment of the present application described below, the terms 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), PUSCH (Physical Uplink Shared Channel), and the like used in the existing LTE are used. These are for the sake of easy description, and the same signals, functions, and the like can be called by other names. Further, the above terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, and the like. However, even for the signals for NR, "NR-" is not necessarily explicitly described.

[0028] Moreover, in the embodiment of the present application, a duplexing method can be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or another method (e.g., a flexible duplexing method).

[0029] Moreover, in the embodiment of the present application, the "configure" wireless parameters and the like can be pre-configured with predetermined values, or can be configured with wireless parameters notified from the base station 10 or the terminal 20.

[0030] Figure 1 is a diagram illustrating an example of a structure of a wireless communication system in the embodiment of the present application. As Figure 1 indicated, the wireless communication system in the embodiment of the present application includes the base station 10 and the terminal 20. In Figure 1 , one base station 10 and one terminal 20 are each illustrated, but this is merely an example, and there can be a plurality of each.

[0031] The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. A physical resource of a wireless signal is defined in a time domain and a frequency domain, the time domain can be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain can be defined by the number of subcarriers or the number of resource blocks. The base station 10 transmits a synchronization signal and system information to the terminal 20. The synchronization signal is, for example, an NR-PSS and an NR-SSS. The system information is transmitted by, for example, an NR-PBCH, and is also referred to as broadcast information. The synchronization signal and the system information can also be referred to as an SSB (SS / PBCH block). As Figure 1As shown, base station 10 sends control signals or data to terminal 20 via DL (Downlink) and receives control signals or data from terminal 20 via UL (Uplink). Both base station 10 and terminal 20 are capable of beamforming for signal transmission and reception. Furthermore, both base station 10 and terminal 20 can apply MIMO (Multiple Input Multiple Output) based communication to DL or UL. Additionally, base station 10 and terminal 20 can also communicate via CA (Carrier Aggregation) based secondary cells (SCell) and primary cells (PCell). Moreover, terminal 20 can also communicate via DC (Dual Connectivity) based primary cells of base station 10 and primary / secondary cells of other base stations 10 (PSCell).

[0032] Terminal 20 is a communication device with wireless communication capabilities, such as a smartphone, mobile phone, tablet computer, wearable terminal, or M2M (Machine-to-Machine) communication module. Figure 1 As shown, terminal 20 receives control signals or data from base station 10 via DL and transmits control signals or data to base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. Furthermore, terminal 20 receives various reference signals transmitted from base station 10 and performs propagation path quality measurements based on the reception results of these reference signals. Additionally, while this embodiment describes communication between base station 10 and terminal 20, it is not limited to this; for example, it can also be applied to communication between multiple terminals 20.

[0033] Furthermore, various requirements for next-generation 6G were further investigated. These requirements include ultra-broadband communication, mission-critical communication, ultra-massive connection, universal coverage, intelligent connection, and ubiquitous sensing.

[0034] To achieve this demand, as a new concept, extensibility (Extensible, for example, to be able to use more efficiently in the future), customizability (Customizable, for example, to be able to be easily applied), and sustainability (Sustainable, for example, cost reduction and more robust structure) are targeted.

[0035] Figure 2 is a diagram for explaining example (1) of a frequency band in the embodiment of the present application. As a frequency band (Frequency Range (FR)) that can be used in 5G, FR1 from 410 MHz to 7.125 GHz and FR2 from 2.425 GHz to 71 GHz are defined. In order to distinguish the FR from the frequency band (Frequency band), the FR can also be expressed as a frequency range. The FR can also include a plurality of frequency bands (Frequency band).

[0036] Also, as shown in Figure 2 In 6G, it is assumed that a frequency band between FR1 and FR2, that is, FR3 of 7.125 GHz to 24 GHz is used. By using a wider bandwidth than FR1, further high speed and large capacity are expected in FR3. In addition, the characteristics of the radio wave are close to FR1 compared to FR2, and thus improvement of the stability of communication and securing of the coverage range are expected. Furthermore, the frequency band of 7.125 GHz to 24 GHz can also be defined with a different name from FR3.

[0037] In 5G, as a frequency band (Frequency Range (FR)), FR1 and FR2 are defined. FR1 and FR2 are separate frequency bands, and it is assumed that the RF device of the UE is independently implemented. In FR1 and FR2, the transmission power control of the UE is independently performed. On the other hand, in the next generation 6G, it is assumed that FR3 as a frequency band between FR1 and FR2 is used. Therefore, since FR1, FR3, and FR2 are configured as continuous frequency bands, the implementation of the RF device can change. Therefore, it is necessary to specify how to perform the transmission power control.

[0038] For example, it is necessary to specify in which unit the transmission power control of the UE is performed. In addition, for example, it is necessary to specify how to define the maximum transmission power (p-Max, p-NR-FR1, p-NR-FR2, p-UE-FR1, p-UE-FR2 (refer to Non-Patent Literature 3) and parameters similar thereto).

[0039] Figure 3 is a flowchart for explaining an example of the transmission power control in the case where a frequency band included in FR3 is used in the embodiment of the present application. In step S1, the terminal 20 decides the maximum transmission power applied in FR3.

[0040] For example, the maximum transmission power can also be specified or decided for each frequency band. Thereby, the specification can be simplified, and the structure of the terminal 20 can be simplified without using FR3 and adjacent frequencies.

[0041] Further, for example, the maximum transmission power can also be specified or decided based on the frequency bands used at the same time. Thereby, with respect to frequency band utilization, various combinations of frequency bands can be dealt with.

[0042] Further, for example, the maximum transmission power can also be decided based on the UE capability.

[0043] In step S2, the terminal 20 decides the transmission power based on the decided maximum transmission power, and performs transmission in FR3.

[0044] Further, a plurality of the method of specifying or deciding the maximum transmission power for each frequency band, the method of specifying or deciding the maximum transmission power based on the frequency bands used at the same time, and the method of deciding the maximum transmission power based on the UE capability can also be combined and applied.

[0045] Further, the frequency bands used at the same time can refer to CA, DC, or the like, and is not limited thereto.

[0046] Further, "decide" can also refer to the network setting the corresponding parameters and the UE following the setting.

[0047] Further, "maximum transmission power" can also refer to any one of the following definitions 1) to 3).

[0048] Definition 1) The maximum total transmission power used by the UE in all serving cells of a certain NR cell group.

[0049] Definition 2) The maximum total transmission power used by the UE in all serving cells of all cell groups.

[0050] Definition 3) The maximum transmission power allowed in a certain serving cell.

[0051] Action 1) The terminal 20 can also independently decide the maximum transmission power for FR1, FR2, and FR3, respectively.

[0052] The maximum transmission power of the above definition 1), the above definition 2), and / or the above definition 3) can be set for each FR.

[0053] Figure 4 is a diagram for explaining example (2) of the frequency band in the embodiment of the present application. As shown in Figure 4 The maximum transmission power of the above definition 1), the above definition 2), and / or the above definition 3) can be set for each of the divided frequency bands.Figure 5 In the example, the low-frequency band in FR3 can be designated as FR3-a, and the high-frequency band as FR3-b, with the terminal 20 setting the maximum transmission power for each. Furthermore, FR3-a and FR3a can mean the same thing, as can FR3-b and FR3b.

[0054] The location of the frequency domain segmentation for FR3 can be defined in the specification or set. If the location of the frequency domain segmentation for FR3 is set, it can be implicitly set to terminal 20 based on the synchronization signal, or it can be notified to terminal 20 via MIB or SIB.

[0055] Terminal 20 can also determine the transmission power of each FR based on the set maximum transmission power.

[0056] Terminal 20 could also be designed with different maximum transmit power settings based on the frequency bands used simultaneously. Different maximum transmit power settings could also mean that the maximum transmit power is limited.

[0057] For example, when using FR3-a and FR3-b simultaneously, it is conceivable that for each frequency band, a value less than the transmit power related to the UE power level is the upper limit of the maximum transmit power that can be set.

[0058] For example, when using FR1 and FR3 simultaneously, it is conceivable that for each frequency band, a value less than the transmit power related to the UE power level is the upper limit of the maximum transmit power that can be set.

[0059] The constraints related to the setting of the maximum transmission power can also be determined based on the frequency domain distance between the simultaneously used frequency bands. For example, constraints can be applied if the frequency domain distance between the simultaneously used frequency bands is less than a predetermined value, and not applied if it is greater than the predetermined value.

[0060] Through the aforementioned action 1), the specifications can be simplified, and the structure of terminal 20 can be simplified without using FR3 and adjacent frequencies. By determining the maximum transmit power for each frequency band, the maximum transmit power corresponding to the frequency band can be applied.

[0061] Action 2) Terminal 20 can also determine the maximum transmission power based on the frequency bands used simultaneously.

[0062] For example, in the case of CA for FR1 and FR3, terminal 20 can also uniformly determine the maximum transmission power for FR1 and FR3. Similarly, in the case of CA for FR2 and FR3, terminal 20 can also uniformly determine the maximum transmission power for FR2 and FR3.

[0063] In such Figure 4In the case where FR3 is divided into a plurality of cases as shown in FIG. 6, the maximum transmission power can be determined uniformly for FR1 and FR3a in the case of CA of FR1 and FR3a, and for FR2 and FR3b in the case of CA of FR2 and FR3b. In addition, in the case where FR3 is divided into a plurality of cases as shown in FIG. 6, the maximum transmission power can be determined independently for each FR as in Action 1) above for FR1 and FR3b in the case of CA of FR1 and FR3b, and for FR2 and FR3a in the case of CA of FR2 and FR3a. Figure 4 In the case where FR3 is divided into a plurality of cases as shown in FIG. 6, the maximum transmission power can be determined independently for each FR as in Action 1) above for FR1 and FR3b in the case of CA of FR1 and FR3b, and for FR2 and FR3a in the case of CA of FR2 and FR3a.

[0064] As described above, in the case of CA of adjacent frequency bands, the maximum transmission power can be determined collectively by aggregating a plurality of frequency bands, and in the case of CA of non-adjacent frequency bands, the maximum transmission power can be determined independently for each frequency band.

[0065] In Action 2), the maximum transmission power is determined collectively by aggregating a plurality of FRs, and in the case where the sum of the transmission powers exceeds the maximum value, the transmission power of a specific FR can be defined to be reduced, which FR can be set or instructed to be reduced, and the reduction of the transmission power can be performed regardless of the FR, for example, based on the transmission priority, the channel type, the signal type, the timing of being scheduled (receiving scheduling information), the transmission timing, the transmission period, and the like.

[0066] For example, the terminal 20 can reduce the transmission power of an FR having a low transmission priority. For example, the terminal 20 can reduce the transmission power of an FR that transmits a specific channel type or a specific signal type.

[0067] In the case of CA of three or more FRs including FR1, FR2, and FR3, or FR1, FR2, FR3a, and FR3b, the method of determining the maximum transmission power independently for each frequency band and the method of determining the maximum transmission power collectively by aggregating a plurality of frequency bands can be combined.

[0068] For example, in the case of CA of FR1, FR2, and FR3a, the terminal 20 can determine the maximum transmission power collectively by aggregating FR1 and FR3a, and the maximum transmission power independently for FR1 and FR3a and FR2.

[0069] For example, in the case of CA of FR1, FR2, FR3a, and FR3b, the terminal 20 can collectively decide the maximum transmission power for the FR1 and FR3a aggregate, collectively decide the maximum transmission power for the FR2 and FR3b aggregate, and independently decide the maximum transmission power for the FR1 and FR3a and the FR2 and FR3b.

[0070] Which of the method of independently deciding the maximum transmission power for each frequency band and the method of collectively deciding the maximum transmission power for the aggregate of multiple frequency bands can be decided based on the distance in the frequency domain between the simultaneously used frequency bands, and the method of combining the methods can be decided.

[0071] In the case of DC including three or more of FR1, FR2, and FR3, or FR1, FR2, FR3a, and FR3b, the method of independently deciding the maximum transmission power for each frequency band and the method of collectively deciding the maximum transmission power for the aggregate of multiple frequency bands can be combined.

[0072] For example, in the case of DC of FR1, FR2, and FR3a, the terminal 20 can collectively decide the maximum transmission power for the FR1 and FR3a aggregate, and independently decide the maximum transmission power for the FR1 and FR3a and the FR2.

[0073] For example, in the case of DC of FR1, FR2, FR3a, and FR3b, the terminal 20 can collectively decide the maximum transmission power for the FR1 and FR3a aggregate, collectively decide the maximum transmission power for the FR2 and FR3b aggregate, and independently decide the maximum transmission power for the FR1 and FR3a and the FR2 and FR3b.

[0074] Which of the method of independently deciding the maximum transmission power for each frequency band and the method of collectively deciding the maximum transmission power for the aggregate of multiple frequency bands can be decided based on the distance in the frequency domain between the simultaneously used frequency bands, and the method of combining the methods can be decided.

[0075] Furthermore, the maximum transmission power can also be decided for each cell group or PUCCH group. That is, the maximum transmission power can be collectively decided for the aggregate of the frequency bands included in the same cell group or PUCCH group as FR3. For example, in the case of MCG being FR1 and FR3 and SCG being FR2, the maximum transmission power can be collectively decided for the MCG aggregate, and the MCG and SCG can be set to independent maximum transmission powers.

[0076] For example, in a case where the MCG is FR1, the SCG is FR2, and FR3, the maximum transmission power can be decided in common for the SCG aggregation, and the MCG and the SCG can be set to independent maximum transmission powers.

[0077] The terminal 20 can also decide the transmission power in each FR based on the set maximum transmission power.

[0078] Further, a frequency group for deciding the maximum transmission power can also be defined, and the maximum transmission power can be decided for each of the frequency groups. The frequency group can be different from the cell group or the PUCCH group, and can be set or notified by different parameters.

[0079] By the above-described action 2), regarding the frequency band utilization, various combinations of frequency bands can be dealt with. The maximum transmission power can be decided in accordance with the frequency bands used, and the maximum transmission power appropriate for the communication environment can be applied.

[0080] The terminal 20 can decide the maximum transmission power based on the UE capability in action 3). The terminal 20 can also make a report associated with the maximum transmission power to the network for the support of FR3.

[0081] The terminal 20 can report which maximum transmission power is supported in a case where FR3 is used alone. For example, which one of the above-described definition 1), the above-described definition 2), and the above-described definition 3) is supported in FR3 can be reported to the network.

[0082] In a case where FR3 is used while FR1 and / or FR2 are used, which FR is aggregated in common and / or which FR is decided independently for the maximum transmission power can also be reported.

[0083] For example, in a case where FR1 and FR3 are used simultaneously, which maximum transmission power value is supported in FR1 and FR3 respectively can be reported, and whether the maximum transmission power is decided independently for FR1 and FR3, or in common for the aggregation can also be reported. For example, in a case where the RF devices are coupled (joint), the maximum transmission power can be decided in common for the aggregation, and in a case where the RF devices are separated (separate), the maximum transmission power can be decided independently.

[0084] Whether the maximum transmission power is decided independently for each frequency band or in common for the aggregation can also be reported for each frequency band or each combination of frequency bands.

[0085] The support of the simultaneous use of FR3 and FR1 or FR2 can also mean the ability to determine the transmission power of FR3 independently of FR1 or FR2, respectively. That is, the support of the simultaneous use of FR3 and FR1 or FR2 can also mean the ability to determine the maximum transmission power per frequency band. That is, it can also be reported whether or not the above-described Action 1) can be applied.

[0086] The report of the supported cell group or PUCCH group can mean a report of whether or not the maximum transmission power is determined independently or collectively by being aggregated. For example, the maximum transmission power can be determined independently for each cell group or PUCCH group, or the maximum transmission power can be determined collectively by being aggregated within the cell group or PUCCH group.

[0087] The definition of the frequency group for determining the maximum transmission power enables the terminal 20 to report to the network what kind of frequency group is supported. The frequency group can be different from the cell group or the PUCCH group, or can be reported by a parameter different from the parameter for the report related to the cell group or the PUCCH group.

[0088] By the above-described Action 3), the maximum transmission power to be applied in FR3 can be determined independently or collectively by being aggregated with other FRs, based on the UE capability.

[0089] By the above-described embodiments, the terminal 20 can apply appropriate transmission power control for communication in FR3.

[0090] That is, in the wireless communication system, transmission power control corresponding to the frequency band can be performed.

[0091] (Structure of Apparatus)

[0092] Next, an example of the functional structure of the base station 10 and the terminal 20 that perform the above-described processes and actions will be described. The base station 10 and the terminal 20 include the functions of the above-described embodiments. However, the base station 10 and the terminal 20 can each have only a part of the functions of the embodiments.

[0093] <Base Station 10>

[0094] Figure 5 is a diagram showing an example of the functional structure of the base station 10 in the embodiment of the present application. As shown in Figure 5 , the base station 10 has a transmission section 110, a reception section 120, a setting section 130, and a control section 140. Figure 5 The functional structure shown in the drawing is merely an example. The functional division and the names of the functional sections can be arbitrary as long as the actions related to the embodiment of the present application can be performed.

[0095] The transmission section 110 includes a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal in a wireless manner. Further, the transmission section 110 transmits an inter-network node message to other network nodes. The reception section 120 includes a function of receiving various signals transmitted from the terminal 20 and extracting, for example, higher layer information from the received signals. Further, the transmission section 110 has a function of transmitting an NR-PSS, an NR-SSS, an NR-PBCH, a DL / UL control signal, and the like to the terminal 20. Further, the reception section 120 receives an inter-network node message from other network nodes.

[0096] The setting section 130 stores setting information set in advance and various setting information transmitted to the terminal 20. The content of the setting information is, for example, information related to the setting of transmission power control and the like.

[0097] The control section 140 performs the setting of the transmission power control as explained in the embodiment. In addition, the control section 140 performs scheduling. It is also possible to include the functional section related to the signal transmission in the control section 140 in the transmission section 110 and to include the functional section related to the signal reception in the control section 140 in the reception section 120.

[0098] <terminal 20>

[0099] Figure 6 is a diagram showing an example of a functional structure of the terminal 20 in the embodiment. As shown in Figure 6 the terminal 20 has a transmission section 210, a reception section 220, a setting section 230, and a control section 240. Figure 6 The functional structure shown in the drawing is merely an example. The functional division and the names of the functional sections can be arbitrary as long as the actions related to the embodiment of the present application can be performed.

[0100] The transmission section 210 generates a transmission signal from transmission data and transmits the transmission signal in a wireless manner. The reception section 220 receives various signals in a wireless manner and acquires higher layer signals from the received physical layer signals. Further, the reception section 220 has a function of receiving an NR-PSS, an NR-SSS, an NR-PBCH, a DL / UL / SL control signal, and the like transmitted from the base station 10. Also, for example, as D2D communication, the transmission section 210 transmits a PSCCH (Physical Sidelink Control Channel), a PSSCH (Physical Sidelink Shared Channel), a PSDCH (Physical Sidelink Discovery Channel), a PSBCH (Physical Sidelink Broadcast Channel), and the like to other terminals 20, and the reception section 220 receives a PSCCH, a PSSCH, a PSDCH, or a PSBCH, and the like from other terminals 20.

[0101] The setting section 230 stores various setting information received by the reception section 220 from the base station 10. Further, the setting section 230 also stores setting information set in advance. The content of the setting information is, for example, information related to the setting of transmission power control and the like.

[0102] The control section 240 performs transmission power control as explained in the embodiment. It is also possible to include a functional section related to signal transmission in the control section 240 in the transmission section 210 and a functional section related to signal reception in the control section 240 in the reception section 220.

[0103] (Hardware structure)

[0104] The block diagrams used in the explanation of the above-described embodiment Figure 5 and Figure 6 illustrate blocks in units of functions. These functional blocks (constituent sections) are realized by any combination of at least one of hardware and software. Further, the method of realizing each functional block is not particularly limited. That is, each functional block can be realized using one device which is physically or logically integrated, or can be realized using a plurality of devices which are physically or logically separated and connected directly or indirectly (for example, using wires, wireless, or the like). The functional blocks can also be realized in combination with software in the above-described one device or the above-described plurality of devices.

[0105] The functions include judgment, decision, determination, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, and the like, but are not limited to these. For example, a functional block (a constituent unit) that functions to transmit is referred to as a transmitting unit or a transmitter. In any case, as described above, the implementation method is not particularly limited.

[0106] For example, the base station 10, the terminal 20, and the like in one embodiment of the present disclosure can function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 7 FIG. 1 is a diagram illustrating an example of a hardware structure of the base station 10 and the terminal 20 according to one embodiment of the present disclosure. The base station 10 and the terminal 20 can be configured as a computer device including a processor 1001, a storage 1002, an auxiliary storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

[0107] In the following description, the term "device" can be replaced with "circuit", "apparatus", "unit", or the like. The hardware structure of the base station 10 and the terminal 20 can be configured to include one or more of the illustrated devices, or can be configured not to include a part of the devices.

[0108] Each function of the base station 10 and the terminal 20 is implemented by reading predetermined software (a program) into the hardware such as the processor 1001, the storage 1002, and causing the processor 1001 to perform arithmetic operation and at least one of controlling communication of the communication device 1004 or controlling reading and writing of data in the storage 1002 and the auxiliary storage 1003.

[0109] The processor 1001 controls the entire computer by causing an operating system to operate, for example. The processor 1001 can be configured by a central processing device (CPU) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like. For example, the control unit 140, the control unit 240, and the like can be implemented by the processor 1001.

[0110] Further, the processor 1001 reads out programs (program codes), software modules, or data, etc., from the storage device 1003 and the communication device 1004 at least one of them to the storage device 1002, and executes various processes according to the programs. As the program, a program that causes the computer to execute at least a part of the operations described in the above-described embodiments is used. For example, Figure 5 The control section 140 of the base station 10 illustrated can also be realized by a control program stored in the storage device 1002 and operated in the processor 1001. Also, for example, Figure 6 The control section 240 of the terminal 20 illustrated can also be realized by a control program stored in the storage device 1002 and operated in the processor 1001. Although it is described that the above-described various processes are executed by one processor 1001, the above-described various processes can also be executed by two or more processors 1001 simultaneously or sequentially. The processor 1001 can also be realized by one or more chips. In addition, the program can also be transmitted from a network via a telecommunication line.

[0111] The storage device 1002 is a computer-readable recording medium, and can be constituted by at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), a RAM (Random Access Memory), and the like, for example. The storage device 1002 can also be referred to as a register, a cache, a main memory (main storage device), and the like. The storage device 1002 can hold programs (program codes), software modules, and the like that can be executed in order to implement the communication method related to one embodiment of the present disclosure.

[0112] The auxiliary storage device 1003 is a computer-readable recording medium, and can be constituted by at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (for example, a compact disk, a digital versatile disk, a Blu-ray (registered trademark) disk, a smart card, a flash memory (for example, a card, a stick, a Key drive), a Floppy (registered trademark) disk, a magnetic stripe, and the like. The above-described storage medium can be, for example, a database, a server, and other appropriate medium that includes at least one of the storage device 1002 and the auxiliary storage device 1003.

[0113] The communication device 1004 is hardware (transceiver) used for communication between computers via at least one of a wired network and a wireless network. It may also be referred to as a network device, network controller, network interface card (NIC), communication module, etc. The communication device 1004 may, for example, be configured to include a high-frequency switch, duplexer, filter, frequency synthesizer, etc., to implement at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, transceiver antennas, amplifiers, transceiver units, transmission path interfaces, etc., can also be implemented using the communication device 1004. The transceiver unit may also be physically or logically separated into a transmitting unit and a receiving unit.

[0114] Input device 1005 is an input device that accepts input from external sources (e.g., keyboard, mouse, microphone, switch, button, sensor, etc.). Output device 1006 is an output device that performs output to external sources (e.g., display, speaker, LED, etc.). Alternatively, input device 1005 and output device 1006 can also be integrated (e.g., a touch panel).

[0115] Furthermore, the processor 1001 and storage device 1002, among other devices, are connected via a bus 1007 for communicating information. The bus 1007 can be a single bus or can be composed of different buses between devices.

[0116] Furthermore, the base station 10 and the terminal 20 can 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), or a FPGA (Field Programmable Gate Array), and can also use this hardware to implement part or all of the functional blocks. For example, the processor 1001 can also be implemented using at least one of these hardware components.

[0117] Figure 8 An example of the structure of vehicle 2001 is shown. For example... Figure 8As shown, the vehicle 2001 has a drive section 2002, a steering section 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, an electronic control section 2010, various sensors 2021 to 2029, an information service section 2012, and a communication module 2013. The forms / embodiments explained in the present disclosure can also be applied to the communication device mounted on the vehicle 2001, for example, to the communication module 2013.

[0118] The drive section 2002 is constituted by, for example, an engine, a motor, or a hybrid of an engine and a motor. The steering section 2003 at least includes a steering wheel (also referred to as a steering handle), and is configured to steer at least one of the front wheels and the rear wheels based on an operation of the steering wheel operated by a user.

[0119] The electronic control section 2010 is constituted by a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (I / O port) 2033. Signals from the various sensors 2021 to 2029 possessed by the vehicle 2001 are input to the electronic control section 2010. The electronic control section 2010 can also be referred to as an ECU (Electronic Control Unit).

[0120] As the signals from the various sensors 2021 to 2029, there are a current signal from a current sensor 2021 that monitors a current of a motor, a rotational speed signal of the front wheels or the rear wheels acquired by a rotational speed sensor 2022, an air pressure signal of the front wheels or the rear wheels acquired by an air pressure sensor 2023, a vehicle speed signal acquired by a vehicle speed sensor 2024, an acceleration signal acquired by an acceleration sensor 2025, a depression amount signal of the accelerator pedal acquired by an accelerator pedal sensor 2029, a depression amount signal of the brake pedal acquired by a brake pedal sensor 2026, an operation signal of the shift lever acquired by a shift lever sensor 2027, a detection signal for detecting an obstacle, a vehicle, a pedestrian, or the like acquired by an object detection sensor 2028, and the like.

[0121] The information service section 2012 is constituted by various devices for providing (outputting) various information such as driving information, traffic information, entertainment information, and the like, and one or more ECUs that control these devices, such as a car navigation system, an audio system, a speaker, a television, a radio, and the like. The information service section 2012 provides various multimedia information and multimedia services to the occupants of the vehicle 2001 using information acquired from external devices via the communication module 2013 or the like. The information service section 2012 can include an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, or the like) that accepts input from the outside, and can also include an output device (for example, a display, a speaker, an LED lamp, a touch panel, or the like) that performs output to the outside.

[0122] The drive assist system section 2030 is constituted by one or more ECUs for providing various devices and controlling the devices for preventing accidents or reducing the driving load of the driver, such as a millimeter wave radar, a LiDAR (Light Detection and Ranging), a camera, a positioner for positioning (e.g., GNSS, etc.), map information (e.g., a high-definition (HD) map, an autonomous vehicle (AV) map, etc.), a gyro system (e.g., an IMU (Inertial Measurement Unit), an INS (Inertial Navigation System), etc.), an AI (Artificial Intelligence) chip, an AI processor. In addition, the drive assist system section 2030 transmits and receives various information via the communication module 2013, and realizes a drive assist function or an autonomous driving function.

[0123] The communication module 2013 can communicate with the microprocessor 2031 and the constituent elements of the vehicle 2001 via a communication port. For example, the communication module 2013 transmits and receives data between the drive section 2002, the steering section 2003, the accelerator pedal 2004, the brake pedal 2005, the shift lever 2006, the front wheels 2007, the rear wheels 2008, the axles 2009, the microprocessor 2031, and the memory (ROM, RAM) 2032 in the electronic control section 2010, and the sensors 2021 to 2029 possessed by the vehicle 2001 via the communication port 2033.

[0124] The communication module 2013 can be controlled by the microprocessor 2031 of the electronic control section 2010, and is a communication device that can communicate with an external device. For example, various information is transmitted and received between the external device via wireless communication. The communication module 2013 can be located inside or outside the electronic control section 2010. The external device can also be a base station, a mobile station, or the like.

[0125] The communication module 2013 can also transmit at least one of the signals input to the electronic control section 2010 from the various sensors 2021 to 2028 described above, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service section 2012 to the external device via wireless communication. The electronic control section 2010, the various sensors 2021 to 2028, the information service section 2012, and the like can also be referred to as input sections that accept input. For example, the PUSCH transmitted by the communication module 2013 can include information based on the above input.

[0126] The communication module 2013 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from an external device, and displays it on the information service section 2012 possessed by the vehicle 2001. The information service section 2012 can also be referred to as an output section that outputs information (e.g., outputs information to a display, a speaker, or the like based on a PDSCH (or data / information decoded from the PDSCH) received by the communication module 2013). In addition, the communication module 2013 stores various information received from an external device in the memory 2032 that is available to the microprocessor 2031. The microprocessor 2031 can also perform control of the drive section 2002, the steering section 2003, the accelerator pedal 2004, the brake pedal 2005, the gear lever 2006, the front wheels 2007, the rear wheels 2008, the axles 2009, the sensors 2021 to 2029, and the like possessed by the vehicle 2001, based on information stored in the memory 2032.

[0127] (SUMMARY OF EMBODIMENTS)

[0128] As described above, according to the embodiment of the present application, there is provided a terminal having: a control section that decides a maximum transmission power applied to a certain frequency range including a plurality of frequency bands, and decides a transmission power based on the maximum transmission power; and a communication section that performs transmission applying the transmission power in the certain frequency range, the control section deciding the maximum transmission power applied to the certain frequency range based on other frequency ranges used at the same time.

[0129] With the above-described structure, the terminal 20 is able to apply appropriate transmission power control to communication in FR3. That is, in a wireless communication system, transmission power control corresponding to a frequency band can be performed.

[0130] The control section can also divide the certain frequency range into a plurality of ranges, and decide a maximum transmission power in each of the divided frequency ranges. With this structure, the terminal 20 is able to apply appropriate transmission power control to communication in FR3.

[0131] The control section can also set, for each frequency range, a value smaller than a transmission power related to a UE power class as an upper limit of the maximum transmission power, in a case where the certain frequency range and other frequency ranges are used at the same time. With this structure, the terminal 20 is able to apply appropriate transmission power control to communication in FR3.

[0132] The control section can also collectively determine the maximum transmission power applied to the certain frequency range and other frequency ranges close to the certain frequency range in the frequency domain, and uniformly determine the maximum transmission power applied to the certain frequency range and the close other frequency ranges when the certain frequency range and the close other frequency ranges are used at the same time, and independently determine the maximum transmission power applied to the certain frequency range separately from the distant other frequency ranges when the certain frequency range and the distant other frequency ranges are used at the same time. With this configuration, the terminal 20 can apply appropriate transmission power control to communication in FR3.

[0133] The control section can also collectively determine the maximum transmission power applied to the certain frequency range and other frequency ranges close to the certain frequency range in the frequency domain, and uniformly determine the maximum transmission power applied to the certain frequency range and the close other frequency ranges when the certain frequency range and the close other frequency ranges are used at the same time, and independently determine the maximum transmission power applied to the certain frequency range separately from the distant other frequency ranges when the certain frequency range and the distant other frequency ranges are used at the same time. With this configuration, the terminal 20 can apply appropriate transmission power control to communication in FR3.

[0134] Further, according to an embodiment of the present application, there is provided a communication method in which a terminal performs the steps of determining a maximum transmission power applied to a certain frequency range including a plurality of frequency bands, and determining a transmission power based on the maximum transmission power, performing transmission applying the transmission power in the certain frequency range, and determining the maximum transmission power applied to the certain frequency range based on other frequency ranges used at the same time.

[0135] With the above-described configuration, the terminal 20 can apply appropriate transmission power control to communication in FR3. That is, in a wireless communication system, transmission power control corresponding to a frequency band can be performed.

[0136] (Supplement to Embodiments)

[0137] The above describes embodiments of the present application, but the disclosed application is not limited to such embodiments, and those skilled in the art will understand various modifications, changes, alternatives, substitutions, and the like. Specific numerical examples are used to facilitate understanding of the application, but these numerical examples are merely examples, and appropriate arbitrary values can be used unless otherwise specified. The items in the above description are not essential to the present application, and two or more of the items described in the items can be combined as needed, or the item can be applied to the item described in another item (as long as there is no contradiction). The boundaries of the functional blocks or processing blocks in the functional block diagram do not necessarily correspond to the boundaries of physical components. The actions of multiple functional blocks can be performed by one physical component, or the actions of one functional block can be performed by multiple physical components. The order of the processes described in the embodiments can be changed as long as there is no contradiction. The base station 10 and the terminal 20 are described using a functional block diagram for convenience of explanation of the processes, but such devices can also be implemented by hardware, software, or a combination thereof. Software that acts according to the embodiments of the present application by the processor of the base station 10 and software that acts according to the embodiments of the present application by the processor of the terminal 20 can each be stored in a random access memory (RAM), a flash memory, a read only memory (ROM), an EPROM, an EEPROM, a register, a hard disk (HDD), a removable disk, a CD-ROM, a database, a server, and other appropriate arbitrary storage media.

[0138] Further, the notification of the information is not limited to the forms / embodiments described in the present disclosure, and other methods can be used. For example, the notification of the information can be implemented by physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), higher 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 a combination thereof. Further, the RRC signaling can also be referred to as an RRC message, and for example, can be an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0139] The forms / embodiments described in this specification can also be applied to at least one of systems utilizing LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), NR (New Radio), 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, UWB (Ultra-WideBand), Bluetooth (registered trademark), other appropriate systems, and next-generation systems extended from them. Furthermore, a plurality of systems (for example, at least one of LTE and LTE-A and 5G, and the like) can be applied in combination.

[0140] For the processes, sequences, flowcharts, and the like, of the forms / embodiments described in this specification, the order of the steps can be changed unless the change results in a contradiction. For example, for the methods described in this disclosure, the elements of the various steps are prompted using the order of the examples, but are not limited to the specific order prompted.

[0141] In this specification, a specific action performed by the base station 10 is sometimes also performed by an upper node thereof according to the situation. In a network constituted by one or a plurality of network nodes having the base station 10, it is obvious that various actions performed for communication with the terminal 20 can be performed by at least one of the base station 10 and other network nodes (for example, consider MME or S-GW, or the like, but not limited to these) other than the base station 10. In the above, a case where the other network node other than the base station 10 is one is exemplified, but the other network node can also be a combination of a plurality of other network nodes (for example, MME and S-GW).

[0142] The information or signals described in this disclosure can be outputted from a higher layer (or lower layer) to a lower layer (or higher layer). It can also be inputted or outputted via a plurality of network nodes.

[0143] The input or output information and the like can be stored in a specific location (for example, a memory) or managed using a management table. The input or output information and the like can be rewritten, updated, or appended. The output information and the like can also be deleted. The input information and the like can also be transmitted to another device.

[0144] The determination in the present disclosure can be made by a value (0 or 1) represented by 1 bit, by a Boolean value (true or false), or by comparison of numerical values (for example, comparison with a predetermined value).

[0145] As for software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by another name, it should be broadly interpreted as meaning commands, command 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 the like.

[0146] In addition, software, commands, information, and the like can also be transmitted and received via a transmission medium. For example, in a case where software is transmitted from a web page, a server, or another remote source using at least one of wired technology (coaxial cable, optical fiber cable, twisted pair cable, digital subscriber line (DSL), and the like) and wireless technology (infrared rays, microwaves, and the like), at least one of these wired technology and wireless technology is included in the definition of the transmission medium.

[0147] The information, signals, and the like described in the present disclosure can also be represented using any of various different technologies. For example, data, commands, instructions, information, signals, bits, symbols, chips, and the like that can be involved in the overall description of the present disclosure can be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination of these.

[0148] In addition, the terms described in the present disclosure and terms necessary for understanding the present disclosure can also be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol can also be a signal (signaling). Furthermore, the signal can also be a message. Furthermore, a component carrier (CC) can also be referred to as a carrier frequency, a cell, a frequency carrier, and the like.

[0149] The terms "system" and "network" used in the present disclosure can be used interchangeably.

[0150] Moreover, information, parameters, and the like described in the present disclosure can be expressed using absolute values, relative values to predetermined values, or other information corresponding thereto. For example, wireless resources can be indicated using indices.

[0151] The names used for the above-described parameters are non-limiting names in any respect. Furthermore, the formulas and the like using these parameters are sometimes different from those explicitly disclosed in the present disclosure. Various channels (e.g., PUCCH, PDCCH, and the like) and information elements can be identified by all appropriate names, and thus various names assigned to the various channels and information elements are non-limiting names in any respect.

[0152] In the present disclosure, the terms "base station (BS)", "wireless base station", "base station device", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", "component carrier", and the like can be used interchangeably. The base station is sometimes referred to as a macro cell, a small cell, a femto cell, a pico cell, and the like.

[0153] A base station can accommodate one or a plurality of (e.g., 3) cells. In a case where a base station accommodates a plurality of cells, the coverage area of the base station as a whole can be divided into a plurality of smaller areas, and each of the smaller areas can also be provided with a communication service by a base station subsystem (e.g., a small base station RRH: Remote Radio Head for indoor use). The term "cell" or "sector" refers to a part or the whole of the coverage area of at least one of the base station and the base station subsystem that provides a communication service in the coverage range.

[0154] In the present disclosure, the base station transmitting information to the terminal can be replaced with the base station instructing the terminal to perform control / action based on the information.

[0155] In the present disclosure, the terms "mobile station (MS)", "user terminal", "user equipment (UE)", "terminal", and the like can be used interchangeably.

[0156] For a mobile station, the following terms are also used by those skilled in the art to refer to a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology.

[0157] At least one of the base station and the mobile station can also be referred to as a transmission device, a reception device, a communication device, or the like. In addition, at least one of the base station and the mobile station can be a device mounted on a moving body, the moving body itself, or the like. The moving body refers to an object that can move, and the moving speed is arbitrary. In addition, of course, a case where the moving body is stopped is also included. The moving body includes, for example, a vehicle, a transport vehicle, an automobile, a motorcycle, a bicycle, a connected car, a shovel car, a bulldozer, a wheel loader, a dump truck, a forklift, a train, a bus, a rear car, a rickshaw, a ship and other watercraft, an airplane, a rocket, an artificial satellite, a drone (registered trademark), a multicopter, a quadcopter, a balloon, and an object mounted thereon, and is not limited thereto. In addition, the moving body can also be a moving body that autonomously travels based on a travel instruction. It can be a vehicle (for example, a car, an airplane, or the like), a moving body that moves in a unmanned manner (for example, a drone, a self-driving car, or the like), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move when communicating. For example, at least one of the base station and the mobile station can be an IoT (Internet of Things) device such as a sensor.

[0158] In addition, the base station in the present disclosure can also be replaced with a user terminal. For example, a structure in which communication between the base station and the user terminal is replaced with communication between a plurality of terminals 20 (for example, can also be referred to as D2D (Device-to-Device), V2X (Vehicle-to-Everything), or the like) can also apply the forms / embodiments of the present disclosure. In this case, it can also be configured as a structure in which the terminal 20 has the functions of the base station 10 described above. In addition, the expressions such as "uplink" and "downlink" can also be replaced with expressions corresponding to communication between terminals (for example, "side"). For example, the uplink channel, the downlink channel, and the like can also be replaced with a side channel.

[0159] Similarly, the user terminal in the present disclosure can also be replaced with a base station. In this case, it can also be formed as a structure in which the base station has the functions of the user terminal described above.

[0160] The terms "determining" and "deciding" used in the present disclosure sometimes also include a variety of actions. The "determining" and "deciding" can include, for example, a matter in which a matter that has been judged, calculated, computed, processed, derived, investigated, searched (for example, a search in a table, a database, or other data structure), ascertained, and the like is considered as a matter in which "determining" and "deciding" have been performed. In addition, the "determining" and "deciding" can include a matter in which a matter that has been received (for example, received information), transmitted (for example, transmitted information), input, output, accessed (for example, accessed data in a memory), and the like is considered as a matter in which "determining" and "deciding" have been performed. In addition, the "determining" and "deciding" can include a matter in which a matter that has been resolved, selected, chosen, established, compared, and the like is considered as a matter in which "determining" and "deciding" have been performed. That is, the "determining" and "deciding" can include a matter in which certain actions are considered as a matter in which "determining" and "deciding" have been performed. In addition, the "determining" and "deciding" can also be replaced with "assuming", "expecting", "considering", and the like.

[0161] The terms "connected," "coupled," and "coupling," or any variant thereof, are intended to mean any connection or coupling, either direct or indirect, between two or more elements. Such connections can be physical, logical, or a combination thereof. For example, "connected" can be replaced with "accessed" in some contexts. As used in this disclosure, two elements are considered to be "connected" or "coupled" to each other using at least one of electrical wire, cable, and printed electric connections, and as some non-limiting and non-inclusive examples, electromagnetic energy having wavelengths in the radio frequency, microwave, and light (including both visible and non-visible) regions.

[0162] A reference signal can be referred to simply as RS (Reference Signal), and can also be referred to as a pilot depending on the standard being applied.

[0163] As used in this disclosure, the recitation "based on" is not meant to "based only on" unless specifically recited otherwise. In other words, the recitation "based on" means both "based only on" and "based at least on."

[0164] Any reference to elements using the designations "first," "second," and so on used in this disclosure is not intended to limit the number or order of such elements. Such designations can be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to first and second elements does not mean that only two elements can be employed or that the first element must precede the second element in any manner.

[0165] The term "unit" in the structure of each of the above-described apparatuses can be replaced with the term "section," "circuit," "device," or the like.

[0166] As used in this disclosure, the terms "include," "including," and variations thereof, mean that the items listed after the term are included, identical to the term "comprising." Also, as used in this disclosure, the term "or" does not mean exclusive or.

[0167] A radio frame can be composed of one or more slots in the time domain. In the time domain, one or more slots can be referred to as a subframe. A subframe can be composed of one or more slots in the time domain. A subframe can be a fixed length of time regardless of numerology (e.g., 1 ms).

[0168] A numerology can be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. The numerology can indicate at least one of, for example, a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), a number of symbols per TTI, a radio frame structure, a specific filtering processing by a transceiver in a frequency domain, a specific windowing processing by a transceiver in a time domain, and the like.

[0169] A slot can be constituted by one or a plurality of symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, and the like) in a time domain. The slot can be a time unit based on a numerology.

[0170] A slot can include a plurality of mini-slots. Each mini-slot can be constituted by one or a plurality of symbols in a time domain. Further, the mini-slot can also be referred to as a sub-slot. The mini-slot can be constituted by a smaller number of symbols than the slot. A PDSCH (or PUSCH) transmitted in a time unit larger than the mini-slot can be referred to as PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using the mini-slot can be referred to as PDSCH (or PUSCH) mapping type B.

[0171] A radio frame, a subframe, a slot, a mini-slot, and a symbol each indicate a time unit in transmission of a signal. The radio frame, the subframe, the slot, the mini-slot, and the symbol can each use a corresponding other name.

[0172] For example, 1 subframe can be referred to as a transmission time interval (TTI), a plurality of consecutive subframes can also be referred to as a TTI, 1 slot or 1 mini-slot can also be referred to as a TTI. That is, at least one of a subframe and a TTI can be a subframe (1 ms) in the existing LTE, can be a period shorter than 1 ms (for example, 1-13 symbols), or can be a period longer than 1 ms. In addition, a unit indicating a TTI can not be referred to as a subframe, but can be referred to as a slot, a mini-slot, or the like.

[0173] Here, the TTI refers to, for example, a minimum time unit of scheduling in wireless communication. For example, in the LTE system, the base station performs scheduling of allocating a radio resource (a frequency bandwidth, a transmission power, and the like that can be used in each terminal 20) to each terminal 20 in units of TTI. Note that the definition of TTI is not limited to this.

[0174] The TTI can be a transmission time unit of a channel-encoded data packet (transport block), a code block, a codeword, or the like, and can also be a processing unit of scheduling, link adaptation, or the like. Note that when the TTI is given, the time interval (for example, the number of symbols) in which a transport block, a code block, a codeword, or the like is actually mapped can also be shorter than the TTI.

[0175] Note that in a case where one slot or one mini-slot is referred to as TTI, one or more TTIs (that is, one or more slots or one or more mini-slots) can also be a minimum time unit of scheduling. Furthermore, the number of slots (the number of mini-slots) that constitute the minimum time unit of scheduling can also be controlled.

[0176] A TTI having a time length of 1 ms can also be referred to as a normal TTI (TTI in LTE Rel. 8-12), a normal TTI (normal TTI), a long TTI (long TTI), a normal subframe, a normal subframe (normal subframe), a long (long) subframe, a slot, or the like. A TTI shorter than the normal TTI can also be referred to as a shortened TTI, a short TTI (short TTI), a partial TTI (partial or fractional TTI), a shortened subframe, a short (short) subframe, a mini-slot, a sub-slot, a slot, or the like.

[0177] Note that for a long TTI (long TTI) (for example, a normal TTI, a subframe, or the like), it can be understood as a TTI having a time length exceeding 1 ms, and for a short TTI (short TTI) (for example, a shortened TTI, or the like), it can be understood as a TTI having a TTI length shorter than the long TTI (long TTI) and a TTI length of 1 ms or more.

[0178] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and in the frequency domain, can include one or a plurality of contiguous subcarriers. The number of subcarriers included in the RB can be the same regardless of the numerology, and for example, can be 12. The number of subcarriers included in the RB can be determined based on the numerology.

[0179] In addition, the time domain of the RB can include one or a plurality of symbols, and can be 1 slot, 1 mini-slot, 1 subframe, or 1 TTI in length. 1 TTI, 1 subframe, or the like can each be composed of one or a plurality of resource blocks.

[0180] In addition, one or a plurality of RBs can also be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, or the like.

[0181] In addition, a resource block can be composed of one or a plurality of resource elements (REs). For example, 1 RE can be a wireless resource area of 1 sub-carrier and 1 symbol.

[0182] A bandwidth part (BWP) (may also be referred to as a partial bandwidth, or the like) can also indicate a subset of contiguous common resource blocks (RBs) for a certain numerology in a certain carrier. Here, the common RBs can be determined by the index of the RBs with reference to a common reference point of the carrier. A PRB can be defined in a certain BWP and numbered within the BWP.

[0183] A BWP can include a BWP for UL (UL BWP) and a BWP for DL (DL BWP). One or a plurality of BWP can be configured for a UE within 1 carrier.

[0184] At least one of the configured BWP can be active, and it can not be assumed that the UE transmits / receives a predetermined signal / channel outside the active BWP. In addition, "cell", "carrier", and the like in the present disclosure can be replaced with "BWP".

[0185] The structures of the wireless frame, the subframe, the slot, the mini-slot, and the symbol described above, and the like are merely examples. For example, the number of subframes included in the wireless frame, the number of slots per subframe or per wireless frame, the number of mini-slots included in the slot, the number of symbols and RBs included in the slot or the mini-slot, the number of subcarriers included in the RB, and the number of symbols, the symbol length, the cyclic prefix (CP) length, and the like within the TTI can be variously changed.

[0186] In the present disclosure, for example, in a case where an article is added by a translation of an article such as a, an, and the in English, the present disclosure also includes a case where the article following the article is plural.

[0187] In the present disclosure, the expression "A and B are different" can mean "A and B are mutually different". In addition, the expression can also mean "A and B are each different from C". The expressions "separation", "combination", and the like can also be interpreted in the same manner as "different".

[0188] The forms / embodiments described in the present disclosure can be used alone or in combination, and can also be used in switching along with execution. In addition, notification of predetermined information (for example, notification of "X is") is not limited to being performed explicitly, and can also be performed implicitly (for example, without performing notification of the predetermined information).

[0189] The above has been described in detail in the present disclosure, but it should be clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented as modifications and changes without departing from the spirit and scope of the present disclosure determined by the claims. Therefore, the purpose of the description of the present disclosure is to illustrate, and the present disclosure does not have any limiting meaning.

[0190] Label Explanation

[0191] 10 base station

[0192] 110 transmission unit

[0193] 120 reception unit

[0194] 130 setting unit

[0195] 140 control unit

[0196] 20 terminal

[0197] 210 transmission unit

[0198] 220 reception unit

[0199] 230 setting unit

[0200] 240 control unit

[0201] 1001 processor

[0202] 1002 storage device

[0203] 1003 auxiliary storage device

[0204] 1004 communication device

[0205] 1005 input device

[0206] 1006 output device

Claims

1. A terminal having: a control section that decides a maximum transmission power applied to a certain frequency range including a plurality of frequency bands, and decides a transmission power based on the maximum transmission power; and a communication section that performs transmission applying the transmission power in the certain frequency range, the control section deciding the maximum transmission power applied to the certain frequency range based on other frequency ranges used at the same time.

2. The terminal according to claim 1, wherein the control section divides the certain frequency range into a plurality, and decides a maximum transmission power in each of the divided frequency ranges.

3. The terminal according to claim 1, wherein the control section, in a case where the certain frequency range and other frequency ranges are used at the same time, sets a value smaller than a transmission power related to a UE power class as an upper limit of the maximum transmission power for each of the frequency ranges.

4. The terminal according to claim 1, wherein the control section, in a case where the certain frequency range and other frequency ranges close to the certain frequency range in a frequency domain are used at the same time, collectively decides the maximum transmission power applied to the certain frequency range and the other frequency ranges close to the certain frequency range by aggregating the certain frequency range and the other frequency ranges close to the certain frequency range, and in a case where the certain frequency range and other frequency ranges not close to the certain frequency range in the frequency domain are used at the same time, decides the maximum transmission power applied to the certain frequency range independently of the other frequency ranges not close to the certain frequency range.

5. The terminal according to claim 1, wherein the control section collectively decides the maximum transmission power applied to the certain frequency range and other frequency ranges included in the same group as the certain frequency range by aggregating the certain frequency range and the other frequency ranges. The terminal performs the following steps: deciding a maximum transmission power applied to a certain frequency range including a plurality of frequency bands, and deciding a transmission power based on the maximum transmission power; performing transmission applying the transmission power in the certain frequency range; and deciding the maximum transmission power applied to the certain frequency range based on other frequency ranges used at the same time. ​ ​ ​ ​ ​ ​ 6. A communication method, wherein, ​ ​ ​ ​

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