Terminals, communication methods, and integrated circuits

Abstract

This terminal comprises: a control circuit that determines first information related to a surplus power relative to a first transmission setting made to the terminal and second information related to a surplus power related to a second transmission setting not made to the terminal; and a transmission circuit that transmits the first information and the second information.

Description

Terminal, base station and communication method

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

[0002] In recent years, the expansion and diversification of wireless services has led to the expectation of rapid development of the Internet of Things (IoT). Mobile communications are now being used in a wide range of applications, from smartphones and other information terminals to automobiles, homes, home appliances, and industrial equipment. To support this diversification, significant improvements in the performance and functionality of mobile communication systems are required, addressing various requirements, such as increased system capacity, an increased number of connected devices, and low latency. Fifth-generation mobile communication systems (5G) boast high-capacity and ultra-high-speed data transfer (eMBB: enhanced Mobile Broadband), massive machine-type communication (mMTC: massive machine-type communication), and ultra-reliable and low-latency communication (URLLC), enabling them to flexibly provide wireless communications tailored to diverse needs.

[0003] The 3rd Generation Partnership Project (3GPP), an international standardization organization, is working on the specification of New Radio (NR) as one of the 5G wireless interfaces.

[0004] 3GPP TS38.104 V15.18.0、 “NR Base Station (BS) radio transmission and reception (Release 15)、” September 2022.RP-202928, “New WID on NR coverage enhancements,” China Telecom, December 2020.RP-220937, “Revised WID on Further NR coverage enhancements,” China Telecom, March 2022.3GPP TS38.211 V17.3.0、 “NR Physical channels and modulation (Release 17)、” September 2022.3GPP TS38.212 V17.3.0、 “NR Multiplexing and channel coding (Release 17)、” September 2022.3GPP TS38.213 V17.3.0、 “NR Physical layer procedures for control (Release 17)、” September 2022.3GPP TS38.214 V17.3.0、 “NR Physical layer procedures for data (Release 17)、” September 2022.3GPP TS38.321 V17.2.0, “NR; Medium Access Control (MAC) protocol specification (Release 17),” September 2022.3GPP TS38.133 V17.7.0, “NR; Requirements for support of radio resource management (Release 17),” September 2022.3GPPP TS38.101-1 V17.7.0, “NR; User Equipment (UE) radio transmission and reception; Part 1: Range 1 Standalone (Release 17),”September 2022.

[0005] However, there is room for further consideration regarding the method of transmitting signals in the uplink.

[0006] Non-limiting examples of the present disclosure contribute to providing a terminal, a base station, and a communication method that can improve the reception performance of signals in the uplink.

[0007] A terminal according to one embodiment of the present disclosure includes a control circuit that determines first information regarding surplus power for a first transmission setting set in the terminal and second information regarding surplus power for a second transmission setting that is not set in the terminal, and a transmission circuit that transmits the first information and the second information.

[0008] These comprehensive or specific aspects may be realized as a system, an apparatus, a method, an integrated circuit, a computer program, or a recording medium, or may be realized as any combination of a system, an apparatus, a method, an integrated circuit, a computer program, and a recording medium.

[0009] According to one embodiment of the present disclosure, signals can be transmitted appropriately in the uplink.

[0010] Further advantages and benefits of one embodiment of the present disclosure will become apparent from the specification and drawings. Such advantages and / or benefits may be provided by some embodiments and features described in the specification and drawings, respectively, but not necessarily all of them may be provided to obtain one or more identical features.

[0011] Figure showing an example of a Power Headroom Report (PHR) Medium Access Control-Control Element (MAC-CE) Figure showing an example of the relationship between the Power Headroom (PH) value and the PH level Figure showing an example of the relationship between the PH level and the actual value in dB P CMAX,f,cand transmission power level. A diagram showing an example of the relationship between the value of and the transmission power level. A diagram showing an example of the relationship between the transmission power level and the actual value in dB. A block diagram showing an example of the configuration of a part of a base station. A block diagram showing an example of the configuration of a part of a terminal. A diagram showing an example of the configuration of a PHR MAC CE. A diagram showing an example of the configuration of a PHR MAC CE. A diagram showing an example of the relationship between the transmission setting set in the terminal and the reference transmission setting. A flowchart showing an example of the operation of a terminal. A block diagram showing an example of the configuration of a base station. A block diagram showing an example of the configuration of a terminal. A diagram of an exemplary architecture of a 3GPP NR system. A schematic diagram showing the functional separation between NG-RAN and 5GC. A sequence diagram of the procedure for setting up / resetting an RRC (Radio Resource Control) connection. A schematic diagram showing usage scenarios of enhanced Mobile BroadBand (eMBB), massive Machine Type Communications (mMTC), and Ultra Reliable and Low Latency Communications (URLLC). A block diagram showing an exemplary 5G system architecture for a non-roaming scenario.

[0012] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings.

[0013] In NR, for example, in addition to frequency bands below 6 GHz, such as the 700 MHz to 3.5 GHz band (also referred to as Frequency Range 1 (FR1)), which have been used for cellular communications, millimeter wave bands such as the 28 GHz or 39 GHz band (also referred to as Frequency Range 2 (FR2)), which can ensure wide bandwidth, can be utilized (see, for example, Non-Patent Document 1). Furthermore, for example, in FR1, there is a possibility that a frequency band such as the 3.5 GHz band, which is higher than the frequency bands used in Long Term Evolution (LTE) or 3G (3rd Generation mobile communication systems), will be used.

[0014] The higher the frequency band, the greater the radio wave propagation loss and the more likely it is that radio wave reception quality will deteriorate. Therefore, when NR uses a frequency band higher than that of LTE or 3G, it is expected to ensure a communication area (or coverage) equivalent to that of radio access technologies (RATs) such as LTE or 3G, in other words, to ensure appropriate communication quality. For example, 3GPP Release 17 (e.g., referred to as "Rel. 17") and Release 18 (e.g., referred to as "Rel. 18") have considered methods for improving coverage in NR (see, for example, Non-Patent Document 2 and Non-Patent Document 3).

[0015] In NR, a terminal (e.g., also referred to as user equipment (UE)) transmits and receives data in accordance with, for example, a layer 1 control signal (e.g., DCI: Downlink Control Information) on a downlink control channel (e.g., PDCCH: Physical Downlink Control Channel) from a base station (e.g., also referred to as gNB) or a resource allocation indicated by layer 3 Radio Resource Control (RRC) (see, for example, Non-Patent Documents 4 to 7).

[0016] In the uplink (UL), for example, a terminal transmits an uplink data channel (for example, a Physical Uplink Shared Channel (PUSCH)) in accordance with resource allocation (for example, a Grant or UL grant) from a base station.

[0017] [Regarding PUSCH Transmission Waveform] In NR, Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) and Cyclic Prefix-OFDM (CP-OFDM) are supported as PUSCH transmission waveforms.

[0018] Compared with CP-OFDM, DFT-s-OFDM has a lower peak-to-average power ratio (PAPR) of the transmitted signal and higher power utilization efficiency, making it a transmission waveform that can ensure wide uplink coverage. CP-OFDM also has high compatibility with Multiple-Input Multiple-Output (MIMO), making it an effective transmission waveform for high-efficiency transmission (e.g., multi-rank or multi-layer transmission in spatial multiplexing transmission) in a high-reception quality (e.g., signal-to-interference and noise power ratio (SNR)) environment.

[0019] In NR up to Rel. 17, the transmission waveform of the PUSCH is semi-statically configured by RRC (see, for example, Non-Patent Document 7).

[0020] For example, the transmission waveform of Message 3 (Msg.3) PUSCH in the 4-step random access procedure is determined based on the parameter "msg3-transformPrecoder" set by RRC.

[0021] Also, for example, the transmission waveform of Message A (Msg.A) PUSCH in the 2-step random access procedure is determined based on the parameter "msgA-transformPrecoder" set by RRC. Note that if msgA-transformPrecoder is not set by RRC, the transmission waveform of Msg.A PUSCH may be determined based on msg3-transformPrecoder.

[0022] Furthermore, for example, the transmission waveform of a PUSCH (for example, Dynamic Grant-PUSCH (DG-PUSCH)) that is dynamically scheduled by DCI format 0-0 is determined based on the parameter "msg3-transformPrecoder" set by RRC.

[0023] Furthermore, for example, the transmission waveform of a PUSCH (for example, DG-PUSCH) dynamically scheduled by DCI format 0-1 or DCI format 0-2 is determined based on a parameter "transformPrecoder" included in a pusch-Config information element (IE) configured by RRC. Note that if transformPrecoder is not configured by RRC, the transmission waveform of a PUSCH dynamically scheduled by DCI format 0-1 or DCI format 0-2 may be determined based on msg3-transformPrecoder.

[0024] Furthermore, for example, the transmission waveform of a PUSCH (for example, Configured grant-PUSCH (CG-PUSCH)) transmitted based on resource allocation instructed by RRC, which is layer 3, or semi-static resource allocation by Activation DCI, is determined based on a parameter "transformPrecoder" included in configuredGrantConfig IE, which is configured by RRC. Note that when transformPrecoder is not configured by RRC, the transmission waveform of the CG-PUSCH may be determined based on msg3-transformPrecoder.

[0025] [Uplink Transmission Power Control] In NR, a terminal feeds back a Power Headroom Report (PHR) including information about uplink power headroom (PH) to a base station. The base station may dynamically control the uplink transmission power of the terminal based on the PHR, for example.

[0026] The PHR in NR up to Rel. 17 is configured, for example, by a Medium Access Control-Control Element (MAC-CE) shown in Figure 1 (see, for example, Non-Patent Document 8).

[0027] In FIG. 1, "R" indicates a reserved bit (for example, 1 bit).

[0028] In addition, in Fig. 1, "PH" indicates uplink surplus power, and the field size is 6 bits. The relationship between the PH values ​​shown in Fig. 1 and the PH levels corresponding to the PH values ​​is given, for example, in Fig. 2 (see, for example, Non-Patent Document 8). The relationship between each PH level shown in Fig. 2 and the actual value in dB is given, for example, in Fig. 3 (see, for example, Non-Patent Document 9).

[0029] Also, in FIG. 1, "P" indicates a field (e.g., 1 bit) in FR1 indicating whether or not power backoff is applied for power control, and in FR2 indicates a field (e.g., 1 bit) indicating whether or not the applied Power management-Maximum Power Reduction (P-MPR) value is smaller than a threshold value (e.g., "P-MPR_00").

[0030] Also, in Figure 1, "P CMAX,f,c " is the maximum transmission power P of the terminal used to calculate the value of PH included in the PHR. CMAX,f,c The field size is 6 bits. CMAX,f,c The relationship between the value of and the corresponding transmission power level is given, for example, in Figure 4 (see, for example, Non-Patent Document 8). The relationship between each transmission power level shown in Figure 4 and the actual value in dB is given, for example, in Figure 5 (see, for example, Non-Patent Document 9).

[0031] In FIG. 1, "MPE" indicates a field (for example, 2 bits) indicating a transmission power backoff value to satisfy the Maximum Permissible Exposure (MPE) requirement in FR2.

[0032] Uplink transmission control (e.g., PHR) has been described above.

[0033] In a typical cellular system, it is expected that DFT-s-OFDM will be configured to ensure coverage for terminals at the cell edge, where improved uplink coverage is expected.

[0034] However, even in a cell edge terminal, there may be a situation where a high reception quality (e.g., SINR: Signal-to-Interference Noise Ratio) is ensured to transmit a PUSCH due to instantaneous fluctuations in a channel or an interference environment. In such a case, if the transmission waveform is set quasi-statically (e.g., when there are setting constraints), it is difficult for a cell edge terminal with the transmission waveform set to DFT-s-OFDM to switch the transmission waveform to CP-OFDM in accordance with instantaneous fluctuations in the channel or interference environment and perform highly efficient transmission (e.g., multiple layer transmission using MIMO spatial multiplexing), and the transmission efficiency of the cell edge terminal cannot be improved.

[0035] Furthermore, in a terminal with a transmission waveform set to CP-OFDM, there may be a situation where the terminal transmits a PUSCH with improved power efficiency when coverage is significantly reduced due to instantaneous fluctuations in the channel or interference environment. In such a case, if the transmission waveform is set quasi-statically, it becomes difficult for the terminal with a transmission waveform set to CP-OFDM to switch the transmission waveform to DFT-s-OFDM in accordance with the instantaneous fluctuations in the channel or interference environment and improve power efficiency.

[0036] Therefore, in Rel. 18 NR, dynamic switching of the PUSCH transmission waveform based on DCI notification (dynamic waveform switching of transmission waveform) is being considered (see, for example, Non-Patent Document 3).

[0037] Since DFT-s-OFDM and CP-OFDM have different power utilization efficiencies, it is desirable to appropriately control the uplink transmission power in addition to the transmission waveform of the terminal in order to appropriately switch the transmission waveform of the terminal. In dynamic switching of transmission waveforms, in order for the base station to appropriately control the transmission waveform and the uplink transmission power of the terminal, for example, it may be possible to use information on the uplink excess power of the transmission waveform that is a candidate for dynamic switching in addition to information on the uplink excess power of the transmission waveform currently set in the terminal.

[0038] For example, in existing PHR, a terminal feeds back information about the uplink excess power of a transmission waveform currently set in the terminal, but does not feed back information about the uplink excess power of a transmission waveform that is a candidate for dynamic switching.

[0039] In one non-limiting embodiment of the present disclosure, a method for transmitting (or feedback) information about excess uplink power in dynamic switching of uplink transmission waveforms will be described.

[0040] In one non-limiting example of the present disclosure, the terminal feeds back information about the surplus power of a transmit waveform that is not currently set to the terminal in addition to feedback of an existing PHR, for example, feedback of information about the surplus power of a transmit waveform that is not currently set to the terminal. According to one non-limiting example of the present disclosure, the base station can appropriately perform dynamic control of the transmit waveform for the terminal based on the information about the uplink surplus power of a transmit waveform that is a candidate for dynamic switching from the terminal.

[0041] Non-limiting embodiments of the present disclosure will be described below.

[0042] [Overview of Communication System] A communication system according to each embodiment of the present disclosure includes, for example, at least one base station and at least one terminal.

[0043] FIG. 6 is a block diagram showing a configuration example of a portion of a base station 100 according to an embodiment of the present disclosure, and FIG. 7 is a block diagram showing a configuration example of a portion of a terminal 200 according to an embodiment of the present disclosure.

[0044] 6 , a transmitter (e.g., corresponding to a transmitter circuit) determines information related to reception of first information related to surplus power for a first transmission setting set in the terminal 200 and second information related to surplus power for a second transmission setting not set in the terminal 200. A receiver (e.g., corresponding to a receiver circuit) receives the first information and the second information based on the information related to reception.

[0045] 7 , a control unit (e.g., corresponding to a control circuit) determines first information regarding surplus power for a first transmission setting set in the terminal 200 and second information regarding surplus power for a second transmission setting not set in the terminal 200. A transmission unit (e.g., a transmission circuit) transmits the first information and the second information.

[0046] (Embodiment 1) In this embodiment, in addition to feeding back an existing PHR (e.g., a PHR related to a transmission waveform currently set in the terminal 200), the terminal 200 may feed back a PHR related to a transmission waveform that is not currently set in the terminal 200. For example, the PHR related to a transmission waveform that is not currently set in the terminal 200 includes the maximum transmission power P CMAX,f,c (For example, "P CMAX,f,c,other ") may be included.

[0047] The base station 100 uses, for example, information included in the existing PHR and the maximum transmission power P CMAX,f,c The surplus transmit power of the transmit waveform that is a candidate for dynamic switching may be calculated using (an example will be described later).

[0048] Note that the following method of calculating surplus transmission power is one example, and the method of calculating surplus transmission power during dynamic switching of transmission waveforms in base station 100, or how information regarding surplus transmission power is used for dynamic switching of transmission waveforms, may depend on the implementation of base station 100.

[0049] For example, the base station 100 calculates the surplus transmission power of the transmission waveform currently set in the terminal 200 based on the value of PH included in the existing PHR. current may be calculated according to the following formula (1):

[0050] where P CMAX,H,f,c indicates the maximum transmission power value of the terminal 200 that the base station 100 can know (see, for example, Non-Patent Document 10). CMAX,f,c,currentFor example, the PHR (e.g., an existing PHR) shown in FIG. CMAX,f,c PH indicates the maximum transmission power applied by terminal 200 for the transmission waveform currently set in terminal 200, given by the PH field. Also, PH indicates the value of PH given by the PH field of the PHR (e.g., existing PHR) shown in FIG.

[0051] For example, the actual terminal transmission power ActualCurrentTxPower that can be known by the base station 100 may be calculated according to the following equation (2).

[0052] Here, if the maximum transmission power that terminal 200 can apply to a transmission waveform that is not currently set in terminal 200 is "PCMAX,f,c,other", the excess transmission power of a transmission waveform that is not currently set in terminal 200 may be calculated according to the following equation (3).

[0053] From the above, the terminal 200, in addition to the existing PHR, sets the maximum transmission power P CMAX,f,c,other By feeding back the above, the base station 100 can notify the terminal 200 of the excess transmission power (for example, PH or TotalPowerReduction current ), and the surplus transmission power of the transmission waveform that is not currently set in the terminal 200 (for example, PossiblePowerMargin other The base station 100 can set an appropriate transmission waveform for the terminal 200 based on, for example, a comparison of the excess transmission power of the transmission waveforms.

[0054] [Method of Feedback of Maximum Transmission Power of Transmission Waveform Not Currently Set in Terminal 200] Hereinafter, an example of a method of feedback of maximum transmission power for a transmission waveform not currently set in terminal 200 will be described.

[0055] <Feedback Method 1> The maximum transmission power P of a transmission waveform not currently set in the terminal 200 CMAX,f,c (For example, P CMAX,f,c,other ) may be fed back from terminal 200 to base station 100 by, for example, MAC CE.

[0056] For example, when dynamic waveform switching of uplink transmission waveforms is enabled, terminal 200 may feed back PHR MAC CE for transmission waveforms that are not currently configured in terminal 200 in addition to the existing PHR MAC CE.

[0057] For example, when dynamic switching of the uplink transmission waveform is enabled, the terminal 200 uses the existing PHR MAC CE to set the maximum transmission power P CMAX,f,c (For example, P CMAX,f,c,current ) and transmits the maximum transmission power P CMAX,f,c (For example, P CMAX,f,c,other ) may be sent.

[0058] The PHR MAC CE for a transmission waveform that is not currently set in terminal 200 may be constructed, for example, by replacing each field value of the existing PHR MAC CE shown in Figure 1 with a value calculated based on the transmission waveform that is not currently set in terminal 200.

[0059] By using feedback method 1, the terminal 200 can set the maximum transmission power P CMAX,f,c (For example, P CMAX,f,c,other ) can be provided as feedback.

[0060] <Feedback Method 2> For example, when dynamic switching of uplink transmission waveforms is enabled, the terminal 200 may use the existing PHR MAC CE (for example, the maximum transmission power P CMAX,f,c (For example, P CMAX,f,c,current )) by adding an n-byte (n is a positive integer) field to the PHR MAC CE for transmitting the maximum transmission power P CMAX,f,c (For example, P CMAX,f,c,other ) may be sent.

[0061] For example, when dynamic switching of the uplink transmission waveform is enabled, the terminal 200 adds one byte (n=1, 8 bits) to the existing PHR MAC CE as shown in FIG. 8 to set the maximum transmission power P CMAX,f,c (For example, P CMAX,f,c,other ) may be fed back.

[0062] Here, the maximum transmission power P CMAX,f,c (For example, P CMAX,f,c,other The number of bits in the field of PHR is CMAX,f,c (For example, P CMAX,f,c,current ) field, or may be a number of bits different from 6 (for example, 1 bit or more, or 8 bits or less). For example, of the 8 bits added, P CMAX,f,c (For example, P CMAX,f,c,other ) field may be set to a reserved bit, or may be set to a field that feeds back other parameters (e.g., P or MPE for a transmission waveform that is not currently set in the terminal 200).

[0063] In addition, the PHR MAC CE for the transmission waveform that is not currently set in the terminal 200 includes the maximum transmission power P CMAX,f,c (For example, P CMAX,f,c,other ) feedback is included in the MAC CE.

[0064] Feedback method 2 can reduce feedback overhead compared to, for example, a case where PHR MAC CE is added to feedback of an existing PHR MAC CE and PHR MAC CE for a transmission waveform that is not currently set in terminal 200 is fed back (for example, a case where PHR MAC CE is fed back for each candidate transmission waveform).

[0065] <Feedback Method 3> For example, when dynamic switching of uplink transmission waveforms is enabled, the terminal 200 may use the existing PHR MAC CE (for example, the maximum transmission power P CMAX,f,c (For example, P CMAX,f,c,current ) for transmitting the maximum transmission power P CMAX,f,c (For example, P CMAX,f,c,other ) may be sent.

[0066] For example, when dynamic switching of the uplink transmission waveform is enabled, the terminal 200 may change the P of the existing PHR MAC CE as shown in FIG. CMAX,f,c (For example, P CMAX,f,c,current ) field is used to set the maximum transmission power P CMAX,f,c (For example, P CMAX,f,c,other ) may be fed back.

[0067] For example, as shown in FIG. 9, the PHR MAC CE of the existing PHR MAC CE shown in FIG. CMAX,f,c The maximum transmission power P CMAX,f,c (For example, P CMAX,f,c,current ) and the maximum transmission power P of the transmission waveform not currently set in the terminal 200. CMAX,f,c (For example, P CMAX,f,c,other ) and 6-X bits for signaling

[0068] According to feedback method 3, the terminal 200 adjusts the maximum transmission power P CMAX,f,c (For example, P CMAX,f,c,other ) can be provided as feedback.

[0069] Although FIG. 9 shows an example in which X=3 bits and Y=3 bits, the values ​​of X and Y are not limited to this and may be other values.

[0070] In addition, in the existing PHR MAC CE, the maximum transmission power PCMAX,f,c (For example, P CMAX,f,c,other The fields used for sending the P CMAX,f,c It is not limited to some of the fields of P, but may be other fields (e.g., PH, MPE or Reserved fields). CMAX,f,c It may be a field that combines part of one of the fields and part of another field.

[0071] <Feedback Method 4> For example, the maximum transmission power P CMAX,f,c (For example, P CMAX,f,c,other ) may be fed back using uplink control information (UCI).

[0072] The maximum transmission power P of the transmission waveform not currently set in the terminal 200 CMAX,f,c (For example, P CMAX,f,c,other ) may be multiplexed onto the PUSCH and transmitted from terminal 200 to base station 100, or may be transmitted from terminal 200 to base station 100 on the PUCCH.

[0073] According to the feedback method 4, the terminal 200 can obtain the maximum transmission power P CMAX,f,c (For example, P CMAX,f,c,other ) can be provided as feedback.

[0074] As described above, the maximum transmission power P CMAX,f,c (For example, P CMAX,f,c,other ) We explained examples of feedback methods.

[0075] For example, at least two of the feedback methods 1 to 4 may be switched and applied depending on the notification from the base station 100 or the settings of the terminal 200.

[0076] [Method for Triggering Feedback of Maximum Transmission Power of Transmission Waveform Not Currently Set in Terminal 200] Hereinafter, an example of a method for triggering feedback of maximum transmission power of a transmission waveform not currently set in terminal 200 will be described.

[0077] <Trigger Method 1> For example, the maximum transmission power P CMAX,f,c (For example, P CMAX,f,c,other The conditions that trigger the feedback of the PHR MAC CE may be the same as the conditions that trigger the feedback of the existing PHR MAC CE.

[0078] For example, when dynamic switching of the uplink transmission waveform is enabled, the terminal 200 may, simultaneously with (for example, in the same time unit as) the feedback of the existing PHR MAC CE, change the maximum transmission power P CMAX,f,c (For example, P CMAX,f,c,other ) may also be given feedback.

[0079] The condition for triggering the existing PHR MAC CE may be, for example, when the phy-PeriodicTimer expires, or when the measured path loss changes by a value greater than a threshold (for example, phr-Tx-PowerFactorChange) (see, for example, Non-Patent Document 8). Note that the condition for triggering the PHR MAC CE is not limited to these, and other conditions may also be used.

[0080] <Trigger Method 2> For example, the maximum transmission power P CMAX,f,c (For example, P CMAX,f,c,other The conditions that trigger the feedback of the PHR MAC CE may be different from the conditions that trigger the feedback of the existing PHR MAC CE.

[0081] For example, the maximum transmission power P CMAX,f,c (For example, P CMAX,f,c,other As a condition for triggering the feedback of the PHR MAC CE, a condition based on a timer relating to a period different from that of the existing PHR MAC CE (for example, the timer "phy-PeriodicTimer") may be set. CMAX,f,c (For example, P CMAX,f,c,otherAs a condition for triggering the feedback of the PHR MAC CE, a condition based on a path loss different from that of the existing PHR MAC CE (for example, a threshold "phr-Tx-PowerFactorChange") may be set.

[0082] Furthermore, a condition (for example, a threshold value for the difference) based on the difference between the excess transmission power of the transmission waveform currently set in the terminal 200 and the excess transmission power of the transmission waveform not currently set in the terminal 200 may be newly set. For example, when the difference in excess transmission power exceeds the threshold value, the maximum transmission power P CMAX,f,c (For example, P CMAX,f,c,other ) feedback may be triggered.

[0083] <Triggering Method 3> For example, the maximum transmission power P CMAX,f,c (For example, P CMAX,f,c,other ) may be dynamically notified to terminal 200 by DCI.

[0084] An example of a method for triggering feedback of the maximum transmission power of a transmission waveform that is not currently set in terminal 200 has been described above.

[0085] Note that, for example, at least two of the trigger methods 1 to 3 may be switched and applied depending on the notification from the base station 100 or the setting of the terminal 200.

[0086] As described above, in this embodiment, terminal 200 determines information (e.g., including maximum transmission power) regarding excess transmission power for a transmission waveform (e.g., an example of a transmission setting) currently set in terminal 200, and information (e.g., including maximum transmission power) regarding excess transmission power for a transmission waveform not currently set in terminal 200, and feeds this information back to base station 100.

[0087] As a result, even when dynamic switching of uplink transmission waveforms is applied, for example, the base station 100 can use information on the uplink excess power of transmission waveforms that are candidates for dynamic switching (e.g., transmission waveforms that are not currently set in the terminal 200) in addition to information on the uplink excess power of the transmission waveform currently set in the terminal 200. Thus, the base station 100 can appropriately control switching of transmission waveforms and the uplink transmission power of the terminal 200 based on the information on the uplink excess power for each transmission waveform.

[0088] Therefore, according to this embodiment, terminal 200 can appropriately transmit signals in the uplink.

[0089] (Modification of the First Embodiment) In this embodiment, the maximum transmission power P of a transmission waveform that is not currently set in the terminal 200 is CMAX,f,c (For example, P CMAX,f,c,other ), the maximum transmission power P CMAX,f,c (For example, P CMAX,f,c,current ) and the difference, for example, P CMAX,f,c,current -P CMAX,f,c,other According to a variant, the maximum transmission power P CMAX,f,c (For example, P CMAX,f,c,other ) is fed back, the overhead can be reduced. CMAX,f,c (For example, P CMAX,f,c,other ) is fed back, more information can be fed back for the same size, so the granularity of the power level can be increased.

[0090] (Embodiment 2) The existing PHR can be set based on other transmission configurations (e.g., modulation scheme, frequency domain resource allocation) in addition to the transmission waveform. For example, terminal 200 may set the values ​​of each field of the PHR (e.g., PH and maximum transmission power P) using the transmission configuration of the PUSCH that feeds back the PHR MAC CE. CMAX,f,c ) is determined.

[0091] If the base station 100 applies the same transmission settings (e.g., modulation scheme or frequency domain resource allocation) for a certain PUSCH allocation to a subsequent PUSCH allocation, the existing PHR is sufficient, but in this case, flexible allocation of PUSCHs may not be possible.

[0092] For example, the power reduction value of terminal 200 may differ depending on the modulation scheme or frequency resource allocation in addition to the transmission waveform. For this reason, in the existing PHR, base station 100 may not be able to accurately calculate the surplus transmission power when allocating the PUSCH using a transmission setting different from the currently set PUSCH transmission setting.

[0093] Therefore, in this embodiment, in addition to feedback of the existing PHR (including, for example, the maximum transmission power of the transmission setting currently set in the terminal 200), the terminal 200 also receives feedback of the maximum transmission power P CMAX,f,c Provide feedback.

[0094] Here, the transmission configuration may include, for example, at least one of a transmission waveform, a modulation scheme, the number of allocated resource blocks (RBs), or an allocated RB position (for example, Edge BR allocation, Outer RB allocation, Inner RB allocation).

[0095] According to this embodiment, in addition to the existing PHR, the terminal 200 receives the maximum transmission power P CMAX,f,c This allows base station 100 to use (e.g., compare) the excess transmission power of the transmission configuration currently set in terminal 200 with the excess transmission power of the transmission configuration not currently set in terminal 200. For example, base station 100 can appropriately allocate a PUSCH to which a transmission configuration is applied to terminal 200 based on a comparison of the excess transmission power of each transmission configuration.

[0096] For example, P CMAX,f,c The transmission setting for feeding back P may be predetermined in the standard. CMAX,f,cIn this case, the terminal 200 may feed back the PHR of the existing PHR (for example, the PHR of the transmission setting currently set in the terminal 200). CMAX,f,c ) plus the maximum transmit power P CMAX,f,c,reference For example, if the transmission configuration currently set in the terminal 200 is the same as the reference transmission configuration, the terminal 200 may feed back the maximum transmission power P CMAX,f,c,reference feedback may be disabled.

[0097] Also, for example, P CMAX,f,c The transmission configuration for feeding back the PHR may be configured in terminal 200 by RRC. For example, a reference transmission configuration may be configured in terminal 200 by RRC. In this case, terminal 200 may use an existing PHR (for example, the PHR of the transmission configuration currently configured in terminal 200) to feed back the PHR. CMAX,f,c ) plus the maximum transmit power P CMAX,f,c,reference If the transmission configuration currently set in the terminal 200 is the same as the reference transmission configuration, the terminal 200 may feed back the maximum transmission power P CMAX,f,c,reference feedback may be disabled.

[0098] Furthermore, for example, the reference transmission setting may be varied depending on the transmission setting currently set in terminal 200. For example, Fig. 10 is a diagram showing an example of the relationship between the transmission setting currently set in terminal 200 and the reference transmission setting. The relationship between the transmission setting currently set in terminal 200 and the reference transmission setting may be predetermined according to the standard, or may be set in terminal 200 by RRC.

[0099] Furthermore, there may be multiple reference transmission configurations. For example, the terminal 200 determines the maximum transmission power P CMAX,f,c,reference may be fed back, and the maximum transmission power P CMAX,f,c,reference The P for any of the reference transmission configurations may be fed back. CMAX,f,c,reference Whether to feed back the information may be notified from base station 100 to terminal 200, or may be determined by terminal 200 itself.

[0100] The maximum transmission power P of the transmission setting that is not currently set in the terminal 200 CMAX,f,c (For example, P CMAX,f,c,reference The method of feeding back the feedback signal ) and the method of triggering the feedback may be the same as those in the first embodiment.

[0101] As described above, in this embodiment, terminal 200 determines information regarding excess transmission power for the transmission setting currently set in terminal 200 (e.g., including maximum transmission power), and information regarding excess transmission power for the transmission setting not currently set in terminal 200 (e.g., including maximum transmission power), and feeds this information back to base station 100.

[0102] As a result, even when dynamic switching of uplink transmission waveforms is applied, for example, the base station 100 can use information on uplink excess power that depends on transmission waveforms that are candidates for dynamic switching and other transmission settings (e.g., modulation schemes or frequency resource allocation), in addition to information on uplink excess power of the transmission settings currently set in the terminal 200. Thus, even when a PUSCH is assigned using a transmission setting that is different from the transmission setting of the PUSCH currently set, for example, the base station 100 can accurately calculate the excess transmission power, and therefore can appropriately control switching of the transmission waveform and the uplink transmission power of the terminal 200.

[0103] Therefore, according to this embodiment, terminal 200 can appropriately transmit signals in the uplink.

[0104] The above describes the embodiments according to non-limiting examples of the present disclosure.

[0105] [Example of Operation of Terminal 200] FIG. 11 is a flowchart showing an example of operation of terminal 200.

[0106] 11 , the terminal 200 acquires information related to PHR transmission (S101). The information related to PHR transmission may include, for example, information related to a trigger for PHR transmission (e.g., a timer, a threshold for path loss, etc.) and information related to the content of the PHR (e.g., a threshold for P-MPR, a reference transmission setting, etc.).

[0107] The terminal 200 determines whether or not dynamic waveform switching of the uplink transmission waveform is enabled (enabled or disabled) (S102). Whether or not dynamic waveform switching of the uplink transmission waveform is enabled may be configured (or notified) by the base station 100 to the terminal 200, or may be set based on the capability of the terminal 200.

[0108] If dynamic switching of the uplink transmission waveform is enabled (S102: Yes), the terminal 200 selects a maximum transmission power P corresponding to a transmission setting (for example, a transmission waveform, or a transmission waveform and other parameters) that is not currently set in the terminal 200 in addition to the existing PHR (legacy PHR). CMAX,f,c (For example, P CMAX,f,c,other , or P CMAX,f,c,reference ) to the base station 100 (S103).

[0109] On the other hand, if the dynamic switching of the uplink transmission waveform is disabled (S102: No), the terminal 200 reports the existing PHR (legacy PHR) to the base station 100 (S104).

[0110] [Configuration of Base Station] Fig. 12 is a block diagram showing an example configuration of a base station 100 according to embodiment 1. In Fig. 12, the base station 100 includes a control unit 101, a higher-level control signal generation unit 102, a downlink control information generation unit 103, an encoding unit 104, a modulation unit 105, a signal allocation unit 106, a transmission unit 107, a reception unit 108, an extraction unit 109, a demodulation unit 110, and a decoding unit 111.

[0111] At least one of the control unit 101, higher control signal generation unit 102, downlink control information generation unit 103, coding unit 104, modulation unit 105, signal allocation unit 106, extraction unit 109, demodulation unit 110, and decoding unit 111 shown in Fig. 12 may be included in the control unit shown in Fig. 6. Also, the receiving unit 108 shown in Fig. 12 may be included in the receiving unit shown in Fig. 6.

[0112] The control unit 101 determines information related to PUSCH transmission and information related to PHR transmission (or information related to PHR reception) based on, for example, information input from the decoding unit 111, and outputs the determined information to at least one of the higher control signal generation unit 102 and the downlink control information generation unit 103. The information related to PUSCH transmission may include, for example, information related to a transmission waveform, resource allocation information, or information related to a Modulation and Coding Scheme (MCS). Furthermore, the control unit 101 outputs the determined information to the extraction unit 109, the demodulation unit 110, and the decoding unit 111.

[0113] Furthermore, the control unit 101 determines, for example, information related to a downlink signal for transmitting a higher control signal or downlink control information (for example, MCS and radio resource allocation), and outputs the determined information to the coding unit 104, the modulation unit 105, and the signal allocation unit 106. Furthermore, the control unit 101 outputs, for example, information related to a downlink signal (for example, a data signal or a higher control signal) to the downlink control information generation unit 103.

[0114] The higher-level control signal generating section 102 generates a higher-level layer control signal bit string based on information input from the control section 101 , for example, and outputs the higher-level layer control signal bit string to the encoding section 104 .

[0115] The downlink control information generating unit 103 generates a downlink control information (e.g., DCI) bit string based on, for example, information input from the control unit 101, and outputs the generated DCI bit string to the encoding unit 104. Note that the control information may be transmitted to multiple terminals.

[0116] For example, based on information input from the control unit 101, the coding unit 104 codes the downlink data signal, the bit string input from the higher control signal generation unit 102, or the DCI bit string input from the downlink control information generation unit 103. The coding unit 104 outputs the coded bit string to the modulation unit 105.

[0117] The modulation unit 105 modulates the coded bit sequence input from the coding unit 104, for example, based on information input from the control unit 101, and outputs the modulated signal (for example, a symbol sequence) to the signal allocation unit 106.

[0118] The signal allocation unit 106 maps the symbol sequence (including, for example, a downlink data signal or a control signal) input from the modulation unit 105 to the radio resource, for example, based on information indicating the radio resource input from the control unit 101. The signal allocation unit 106 outputs the downlink signal onto which the signal has been mapped to the transmission unit 107.

[0119] The transmitting unit 107 performs, for example, orthogonal frequency division multiplexing (OFDM) transmission waveform generation processing on the signal input from the signal allocating unit 106. Furthermore, in the case of OFDM transmission that adds a cyclic prefix (CP), the transmitting unit 107 performs inverse fast Fourier transform (IFFT) processing on the signal and adds the CP to the signal after the IFFT. Furthermore, the transmitting unit 107 performs RF processing, such as D / A conversion or up-conversion, on the signal and transmits the radio signal to the terminal 200 via an antenna.

[0120] The receiving unit 108 performs RF processing such as downconvert or A / D conversion on an uplink signal received from the terminal 200 via an antenna. In addition, in the case of OFDM transmission, the receiving unit 108 performs Fast Fourier Transform (FFT) processing on the received signal, for example, and outputs the resulting frequency domain signal to the extracting unit 109.

[0121] The extraction unit 109 extracts, for example, based on information input from the control unit 101, a radio resource portion from which an uplink signal (for example, a PUSCH or a PUCCH) is transmitted, from the received signal input from the receiving unit 108, and outputs the extracted radio resource portion to the demodulation unit 110.

[0122] The demodulation unit 110 demodulates the uplink signal (for example, PUSCH or PUCCH) input from the extraction unit 109, for example, based on information input from the control unit 101. The demodulation unit 110 outputs the demodulation result to the decoding unit 111, for example.

[0123] The decoding unit 111 performs error correction decoding on the uplink signal (for example, PUSCH or PUCCH) based on, for example, information input from the control unit 101 and the demodulation result input from the demodulation unit 110, and obtains a decoded received bit sequence. For example, when a PHR is included in the decoded received bit sequence, the decoding unit 111 outputs information about the PHR to the control unit 101.

[0124] [Terminal Configuration] Fig. 13 is a block diagram showing an exemplary configuration of a terminal 200 according to an embodiment of the present disclosure. For example, in Fig. 13, the terminal 200 includes a receiving unit 201, an extracting unit 202, a demodulating unit 203, a decoding unit 204, a control unit 205, an encoding unit 206, a modulating unit 207, a signal allocating unit 208, and a transmitting unit 209.

[0125] At least one of extraction section 202, demodulation section 203, decoding section 204, control section 205, encoding section 206, modulation section 207, and signal allocation section 208 shown in Fig. 13 may be included in the control section shown in Fig. 7. Furthermore, transmission section 209 shown in Fig. 13 may be included in the transmission section shown in Fig. 7.

[0126] The receiving unit 201 receives, for example, a downlink signal (e.g., a downlink data signal or downlink control information) from the base station 100 via an antenna, and performs RF processing such as downconverting or A / D conversion on the radio received signal to obtain a received signal (baseband signal). Furthermore, when receiving an OFDM signal, the receiving unit 201 performs FFT processing on the received signal to convert it into the frequency domain. The receiving unit 201 outputs the received signal to the extracting unit 202.

[0127] For example, based on information relating to the radio resource of the downlink control information input from the control unit 205, the extraction unit 202 extracts a radio resource portion that may include the downlink control information from the received signal input from the receiving unit 201, and outputs the extracted radio resource portion to the demodulation unit 203. Furthermore, based on information relating to the radio resource of the data signal input from the control unit 205, the extraction unit 202 extracts a radio resource portion that includes the downlink data signal, and outputs the extracted radio resource portion to the demodulation unit 203.

[0128] The demodulation unit 203 demodulates the signal (for example, PDCCH or PDSCH) input from the extraction unit 202 based on information input from the control unit 205 , for example, and outputs the demodulation result to the decoding unit 204 .

[0129] The decoding unit 204 performs error correction decoding of the PDCCH or PDSCH using, for example, the demodulation result input from the demodulation unit 203, and obtains, for example, an upper layer control signal or downlink control information. The decoding unit 204 outputs the upper layer control signal and the downlink control information to the control unit 205. Furthermore, the decoding unit 204 may generate a response signal (for example, ACK / NACK) based on the decoding result of the PDSCH.

[0130] The control unit 205 performs uplink transmission control (e.g., determining a transmission waveform for PUSCH transmission, whether to transmit PHR, and information included in PHR) based on, for example, information on PUSCH transmission or information on PHR transmission obtained from a signal (e.g., an upper layer control signal or downlink control information) input from the decoding unit 204. The control unit 205 outputs the determined information to, for example, the encoding unit 206 and the signal allocation unit 208.

[0131] The encoding unit 206 encodes an uplink data signal (UL data signal) or an uplink control signal, for example, based on information input from the control unit 205. The encoding unit 206 outputs the encoded bit string to the modulation unit 207.

[0132] The modulation unit 207 modulates, for example, the coded bit sequence input from the coding unit 206 and outputs the modulated signal (symbol sequence) to the signal allocation unit 208 .

[0133] The signal allocation unit 208 maps the signal (e.g., a sequence) input from the modulation unit 207 to a radio resource, for example, based on information input from the control unit 205. The signal allocation unit 208 outputs the uplink signal onto which the signal is mapped to the transmission unit 209, for example.

[0134] The transmitter 209 generates a transmission signal waveform, such as OFDM, for the signal input from the signal allocation unit 208. Furthermore, in the case of OFDM transmission using a CP, for example, the transmitter 209 performs IFFT processing on the signal and adds a CP to the signal after the IFFT. Alternatively, when the transmitter 209 generates a single-carrier waveform, a DFT unit (not shown) may be added after the modulator 207 or before the signal allocation unit 208. Furthermore, the transmitter 209 performs RF processing, such as D / A conversion and up-conversion, on the transmission signal, and transmits the radio signal to the base station 100 via an antenna.

[0135] (Other Embodiments) In the above-described embodiments, the transmission waveforms are not limited to the two types of DFT-s-OFDM and CP-OFDM, but may be other transmission waveforms, and the number of applicable transmission waveforms may be three or more. When the number of applicable transmission waveforms is three or more, the feedback method described in the above-described embodiments may be extended. For example, when there are three types of transmission waveform candidates, two bytes (e.g., 8 bits + 8 bits) may be added to the existing PHR MAC CE in FIG. 8.

[0136] Furthermore, the units used to calculate the power values ​​in the above-described embodiments may be true values ​​(linear domain) or dB units (log domain).

[0137] Furthermore, in each of the above-described embodiments, the channel used for uplink transmission is not limited to PUSCH and PUCCH, and may be other channels. Furthermore, the type of information to be transmitted is not limited to data, and may be other types of information (e.g., uplink control signals). Furthermore, an embodiment of the present disclosure is not limited to uplink transmission, and may be applied to downlink transmission or sidelink transmission.

[0138] Furthermore, in the above-described first embodiment, terminal 200 may calculate information regarding surplus transmission power for a transmission waveform that is not currently set in terminal 200 by setting the transmission settings (e.g., modulation scheme, number of allocated resource blocks (RBs), number of transmission layers, etc.) of the transmission waveform that is currently set in terminal 200 excluding the transmission waveform to be the same as the transmission settings. Furthermore, if a transmission waveform that is not currently set does not support the transmission settings of the currently set transmission waveform, terminal 200 may not calculate or feed back information regarding surplus transmission power for a transmission waveform that is not currently set.

[0139] Furthermore, the power values, the number of bits in the fields, the arrangement of the fields, and the like exemplified in this disclosure are merely examples, and other values ​​or configurations may be used.

[0140] The present disclosure may be applied to communication between terminals, such as sidelink communication, for example.

[0141] Furthermore, in the present disclosure, the downlink control channel, downlink data channel, uplink control channel, and uplink data channel are not limited to PDCCH, PDSCH, PUCCH, and PUSCH, respectively, and may be control channels with other names.

[0142] Furthermore, in the present disclosure, RRC signaling is assumed as higher layer signaling, but it may be replaced with Medium Access Control (MAC) signaling and notification by DCI, which is physical layer signaling.

[0143] Furthermore, the present disclosure may be applied only to a PUSCH scheduled by DCI (Dynamic grant-PUSCH) and not to a Configured grant PUSCH, whereas the present disclosure may be applied to both the Dynamic grant-PUSCH and the Configured grant PUSCH.

[0144] (Supplementary Note) Information indicating whether the terminal 200 supports the functions, operations, or processes described in each of the above-described embodiments and each supplementary note may be transmitted (or notified) from the terminal 200 to the base station 100, for example, as capability information or capability parameters of the terminal 200.

[0145] The capability information may include an information element (IE) that individually indicates whether or not the terminal 200 supports at least one of the functions, operations, or processes described in the above-described embodiments, modifications, and supplements. Alternatively, the capability information may include an information element that indicates whether or not the terminal 200 supports a combination of any two or more of the functions, operations, or processes described in the above-described embodiments, modifications, and supplements.

[0146] For example, the base station 100 may determine (or decide or assume) the functions, operations, or processes that the terminal 200 that transmitted the capability information supports (or does not support) based on the capability information received from the terminal 200. The base station 100 may perform operations, processes, or controls according to the determination result based on the capability information. For example, the base station 100 may control uplink-related processing based on the capability information received from the terminal 200.

[0147] Note that the fact that terminal 200 does not support some of the functions, operations, or processes described in the above-described embodiments, modifications, and supplementary notes may be interpreted as meaning that such some of the functions, operations, or processes are restricted in terminal 200. For example, information or a request regarding such restrictions may be notified to base station 100.

[0148] Information regarding the capabilities or limitations of terminal 200 may, for example, be defined in a standard, or may be implicitly notified to base station 100 in association with information known at base station 100 or information transmitted to base station 100.

[0149] The above has described the embodiments, modifications, and supplementary notes according to a non-limiting example of the present disclosure.

[0150] (Control Signal) In the present disclosure, a downlink control signal (information) related to the present disclosure may be a signal (information) transmitted by a PDCCH of a physical layer, or may be a signal (information) transmitted by a MAC CE (Control Element) or RRC of a higher layer. Also, the downlink control signal may be a signal (information) that is specified in advance.

[0151] The uplink control signal (information) related to the present disclosure may be a signal (information) transmitted on a PUCCH in the physical layer, or a signal (information) transmitted on a MAC CE or RRC in a higher layer. The uplink control signal may also be a predefined signal (information). The uplink control signal may also be replaced with uplink control information (UCI), 1st stage sidelink control information (SCI), or 2nd stage SCI.

[0152] (Base Station) In the present disclosure, a base station may be a TRP (Transmission Reception Point), a cluster head, an access point, an RRH (Remote Radio Head), an eNodeB (eNB), a gNodeB (gNB), a BS (Base Station), a BTS (Base Transceiver Station), a parent device, a gateway, or the like. In sidelink communication, the base station may be replaced with a terminal. The base station may be a relay device that relays communication between an upper node and a terminal. The base station may be a roadside unit.

[0153] (Uplink / Downlink / Sidelink) The present disclosure may be applied to any of the uplink, downlink, and sidelink. For example, the present disclosure may be applied to the uplink PUSCH, PUCCH, and PRACH, the downlink PDSCH, PDCCH, and PBCH, and the sidelink PSSCH (Physical Sidelink Shared Channel), PSCCH (Physical Sidelink Control Channel), and PSBCH (Physical Sidelink Broadcast Channel).

[0154] The PDCCH, PDSCH, PUSCH, and PUCCH are examples of a downlink control channel, a downlink data channel, an uplink data channel, and an uplink control channel. The PSCCH and PSSCH are examples of a sidelink control channel and a sidelink data channel. The PBCH and PSBCH are examples of broadcast channels, and the PRACH is an example of a random access channel.

[0155] (Data Channel / Control Channel) The present disclosure may be applied to either a data channel or a control channel. For example, the channels of the present disclosure may be replaced with data channels such as PDSCH, PUSCH, and PSSCH, and control channels such as PDCCH, PUCCH, PBCH, PSCCH, and PSBCH.

[0156] (Reference Signal) In the present disclosure, a reference signal is a signal known by both a base station and a terminal, and may also be referred to as an RS (Reference Signal) or a pilot signal. The reference signal may be any of DMRS, CSI-RS (Channel State Information - Reference Signal), TRS (Tracking Reference Signal), PTRS (Phase Tracking Reference Signal), CRS (Cell-specific Reference Signal), and SRS (Sounding Reference Signal).

[0157] (Time Interval) In the present disclosure, the unit of time resource is not limited to one or a combination of slots and symbols, but may be, for example, a time resource unit such as a frame, a superframe, a subframe, a slot, a time slot, a subslot, a minislot, a symbol, an OFDM (Orthogonal Frequency Division Multiplexing) symbol, or an SC-FDMA (Single Carrier-Frequency Division Multiple Access) symbol, or another time resource unit. Furthermore, the number of symbols included in one slot is not limited to the number of symbols exemplified in the above-mentioned embodiment, and may be another number of symbols.

[0158] (Frequency Band) The present disclosure may be applied to either a licensed band or an unlicensed band.

[0159] (Communication) The present disclosure may be applied to communication between a base station and a terminal (Uu link communication), communication between terminals (Sidelink communication), and V2X (Vehicle to Everything) communication. For example, the channels of the present disclosure may be replaced with PSCCH, PSSCH, PSFCH (Physical Sidelink Feedback Channel), PSBCH, PDCCH, PUCCH, PDSCH, PUSCH, or PBCH.

[0160] The present disclosure may be applied to a terrestrial network, a non-terrestrial network (NTN) using satellites or highly advanced pseudo satellites (HAPS), or a terrestrial network in which the transmission delay is large compared to the symbol length or slot length, such as a network with a large cell size or an ultra-wideband transmission network.

[0161] (Antenna Port) An antenna port refers to a logical antenna (antenna group) consisting of one or more physical antennas. In other words, an antenna port does not necessarily refer to a single physical antenna, but may refer to an array antenna consisting of multiple antennas. For example, the number of physical antennas an antenna port consists of is not specified, but it is specified as the smallest unit by which a terminal can transmit a reference signal. An antenna port may also be specified as the smallest unit by which a weighting of a precoding vector is multiplied.

[0162] 5G NR System Architecture and Protocol Stack 3GPP continues work on the next release of fifth-generation cellular technology (also referred to simply as "5G"), which includes the development of new radio access technology (NR) operating in the frequency range up to 100 GHz. The first version of the 5G standard was completed at the end of 2017, allowing for the prototyping and commercial deployment of 5G NR-compliant devices (e.g., smartphones).

[0163] For example, the system architecture generally assumes a Next Generation - Radio Access Network (NG-RAN) comprising gNBs. The gNBs provide UE-side termination of the NG radio access user plane (SDAP / PDCP / RLC / MAC / PHY) and control plane (RRC) protocols. The gNBs are connected to each other via an Xn interface. The gNBs are also connected to a Next Generation Core (NGC) via a Next Generation (NG) interface, more specifically to an Access and Mobility Management Function (AMF) (e.g., a specific core entity performing AMF) via an NG-C interface, and to a User Plane Function (UPF) (e.g., a specific core entity performing UPF) via an NG-U interface. The NG-RAN architecture is shown in Figure 14 (see, for example, 3GPP TS 38.300 v15.6.0, section 4).

[0164] The NR user plane protocol stack (see, for example, 3GPP TS 38.300, section 4.4.1) includes a Packet Data Convergence Protocol (PDCP) sublayer (see Section 6.4 of TS 38.300), a Radio Link Control (RLC) sublayer (see Section 6.3 of TS 38.300), and a Medium Access Control (MAC) sublayer (see Section 6.2 of TS 38.300), which are terminated on the network side in the gNB. A new Access Stratum (AS) sublayer (Service Data Adaptation Protocol (SDAP)) has also been introduced above PDCP (see, for example, Section 6.5 of 3GPP TS 38.300). A control plane protocol stack has also been defined for the NR (see, for example, Section 4.4.2 of TS 38.300). An overview of Layer 2 functions is provided in Section 6 of TS 38.300. The functions of the PDCP sublayer, RLC sublayer, and MAC sublayer are listed in clauses 6.4, 6.3, and 6.2 of TS 38.300, respectively. The functions of the RRC layer are listed in clause 7 of TS 38.300.

[0165] For example, the Medium-Access-Control layer handles logical channel multiplexing and scheduling and scheduling-related functions, including handling various numerologies.

[0166] For example, the physical layer (PHY) is responsible for coding, PHY HARQ processing, modulation, multi-antenna processing, and mapping of signals to appropriate physical time-frequency resources. The physical layer also handles mapping of transport channels to physical channels. The physical layer provides services to the MAC layer in the form of transport channels. A physical channel corresponds to a set of time-frequency resources used for transmitting a specific transport channel, and each transport channel is mapped to a corresponding physical channel. For example, physical channels include the Physical Random Access Channel (PRACH), the Physical Uplink Shared Channel (PUSCH), and the Physical Uplink Control Channel (PUCCH) as uplink physical channels, and the Physical Downlink Shared Channel (PDSCH), the Physical Downlink Control Channel (PDCCH), and the Physical Broadcast Channel (PBCH) as downlink physical channels.

[0167] NR use cases / deployment scenarios may include enhanced mobile broadband (eMBB), ultra-reliable low-latency communications (URLLC), and massive machine-type communication (mMTC), which have diverse requirements in terms of data rate, latency, and coverage. For example, eMBB is expected to support peak data rates (20 Gbps in the downlink and 10 Gbps in the uplink) and effective (user-experienced) data rates approximately three times higher than those offered by IMT-Advanced. On the other hand, URLLC imposes stricter requirements on ultra-low latency (0.5 ms for user plane latency in both UL and DL) and high reliability (1-10-5 within 1 ms). Finally, mMTC preferably requires high connection density (1,000,000 devices / km in urban environments).２ ), wide coverage in adverse environments, and extremely long battery life (15 years) for a low-cost device may be desired.

[0168] Therefore, OFDM numerology (e.g., subcarrier spacing, OFDM symbol length, cyclic prefix (CP) length, number of symbols per scheduling interval) suitable for one use case may not be valid for another use case. For example, low-latency services may preferably require a shorter symbol length (and therefore a larger subcarrier spacing) and / or fewer symbols per scheduling interval (also referred to as TTI) than mMTC services. Furthermore, deployment scenarios with large channel delay spreads may preferably require a longer CP length than scenarios with short delay spreads. The subcarrier spacing may be optimized accordingly to maintain similar CP overhead. NR may support one or more subcarrier spacing values. Correspondingly, subcarrier spacings of 15 kHz, 30 kHz, 60 kHz, etc. are currently considered. The symbol length Tu and subcarrier spacing Δf are directly related by the formula Δf = 1 / Tu. Similar to LTE systems, the term "resource element" can be used to mean the smallest resource unit consisting of one subcarrier for the length of one OFDM / SC-FDMA symbol.

[0169] In the new radio system 5G-NR, for each numerology and each carrier, a resource grid of subcarriers and OFDM symbols is defined for each uplink and downlink. Each element of the resource grid is called a resource element and is specified based on a frequency index in the frequency domain and a symbol position in the time domain (see 3GPP TS 38.211 v15.6.0).

[0170] <Functional Separation Between NG-RAN and 5GC in 5G NR> Figure 15 shows the functional separation between NG-RAN and 5GC. The logical node of NG-RAN is gNB or ng-eNB. 5GC has logical nodes AMF, UPF, and SMF.

[0171] For example, gNB and ng-eNB host the following main functions: - Radio Resource Management functions such as Radio Bearer Control, Radio Admission Control, Connection Mobility Control, dynamic allocation (scheduling) of resources to UEs in both uplink and downlink; - IP header compression, ciphering and integrity protection of data; - AMF selection at UE attach time if routing to the AMF cannot be determined from the information provided by the UE; - Routing of user plane data towards the UPF; - Routing of control plane information towards the AMF; - Connection setup and release; - Scheduling and transmission of paging messages; - Scheduling and transmission of system broadcast information (sourced from the AMF or Operation, Admission, Maintenance (OAM)); - Configuration of measurements and measurement reports for mobility and scheduling; - Transport level packet marking in the uplink; - Session management; Support for network slicing; - QoS flow management and mapping to data radio bearers; - Support for UEs in RRC_INACTIVE state; - NAS message delivery function; - Radio access network sharing; - Dual connectivity; - Close coordination between NR and E-UTRA.

[0172] The Access and Mobility Management Function (AMF) hosts the following main functions: - Termination of Non-Access Stratum (NAS) signaling; - Security of NAS signaling; - Security control of Access Stratum (AS); - Signaling between Core Network (CN) nodes for mobility between 3GPP access networks; - Reachability to idle mode UEs (including control and execution of paging retransmissions); - Registration area management; - Support for intra-system and inter-system mobility; - Access authentication; - Access authorization including checking of roaming rights; - Mobility management control (subscription and policy); - Support for network slicing; - Selection of Session Management Function (SMF).

[0173] Furthermore, the User Plane Function (UPF) hosts the following main functions: - anchor point for intra-RAT / inter-RAT mobility (if applicable); - external PDU (Protocol Data Unit) session point for interconnection with data networks; - packet routing and forwarding; - packet inspection and policy rule enforcement for the user plane part; - traffic usage reporting; - uplink classifier to support routing of traffic flows to the data network; - branching point to support multi-homed PDU sessions; - QoS processing for the user plane (e.g. packet filtering, gating, UL / DL rate enforcement); - uplink traffic validation (mapping of SDF to QoS flows); - downlink packet buffering and triggering of downlink data notifications.

[0174] Finally, the Session Management Function (SMF) hosts the following main functions: session management; allocation and management of IP addresses for UEs; selection and control of UPF; configuration of traffic steering in the User Plane Function (UPF) to route traffic to the appropriate destination; policy enforcement and QoS of the control part; downlink data notification.

[0175] <RRC connection setup and reconfiguration procedure> Figure 16 shows some of the interactions between the UE, gNB, and AMF (5GC entities) when the UE transitions from RRC_IDLE to RRC_CONNECTED in the NAS part (see TS 38.300 v15.6.0).

[0176] RRC is a higher layer signaling (protocol) used to configure the UE and gNB. With this transition, the AMF prepares UE context data (including, for example, PDU session context, security keys, UE radio capabilities, UE security capabilities, etc.) and sends it to the gNB along with an INITIAL CONTEXT SETUP REQUEST. The gNB then activates AS security together with the UE. This is done by the gNB sending a SecurityModeCommand message to the UE, and the UE responding with a SecurityModeComplete message to the gNB. The gNB then sends an RRCReconfiguration message to the UE, and upon receiving an RRCReconfigurationComplete from the UE, the gNB performs reconfiguration to set up Signaling Radio Bearer 2 (SRB2) and Data Radio Bearer (DRB). For signaling-only connections, the steps related to RRCReconfiguration are omitted because SRB2 and DRB are not set up. Finally, the gNB notifies the AMF that the setup procedure is complete with an INITIAL CONTEXT SETUP RESPONSE.

[0177] Accordingly, the present disclosure provides a 5th Generation Core (5GC) entity (e.g., AMF, SMF, etc.) that includes: a control circuit that, upon operation, establishes a Next Generation (NG) connection with a gNodeB; and a transmitter that, upon operation, transmits an initial context setup message to the gNodeB via the NG connection so that a signaling radio bearer between the gNodeB and a user equipment (UE) is set up. Specifically, the gNodeB transmits Radio Resource Control (RRC) signaling, including a resource allocation configuration information element (IE), to the UE via the signaling radio bearer. The UE then transmits in uplink or receives in downlink based on the resource allocation configuration.

[0178] <IMT Usage Scenarios Beyond 2020> Figure 17 shows some use cases for 5G NR. The 3rd Generation Partnership Project New Radio (3GPP NR) is considering three use cases envisioned by IMT-2020 to support a wide variety of services and applications. The first phase of specifications for enhanced mobile broadband (eMBB) has been completed. Current and future work includes standardization for ultra-reliable and low-latency communications (URLLC) and massive machine-type communications (mMTC), in addition to expanding support for eMBB. Figure 17 shows some examples of envisioned usage scenarios for IMT beyond 2020 (see, for example, ITU-R M.2083 Figure 2).

[0179] The URLLC use case has stringent performance requirements for throughput, latency, and availability. It is envisioned as one of the enabling technologies for future applications such as wireless control of industrial production or manufacturing processes, remote medical surgery, automated power transmission and distribution in smart grids, and road safety. URLLC's ultra-high reliability is supported by identifying technologies that meet the requirements set by TR 38.913. Key requirements for NR URLLC in Release 15 include a target user plane latency of 0.5 ms on the uplink (UL) and 0.5 ms on the downlink (DL). The overall URLLC requirement for a single packet transmission is a block error rate (BLER) of 1E-5 for a 32-byte packet size with a user plane latency of 1 ms.

[0180] From a physical layer perspective, reliability can be improved in many possible ways. Current room for reliability improvement includes defining a separate CQI table for URLLC, more compact DCI formats, PDCCH repetition, etc. However, this room can be expanded to achieve ultra-high reliability as NR (with respect to the key requirements of NR URLLC) becomes more stable and developed. Specific use cases for NR URLLC in Release 15 include Augmented Reality / Virtual Reality (AR / VR), e-health, e-safety, and mission-critical applications.

[0181] Additionally, the technology enhancements targeted by NR URLLC aim to improve latency and reliability. Technology enhancements for latency improvement include configurable numerology, non-slot-based scheduling with flexible mapping, grant-free (configured grant) uplink, slot-level repetition in the data channel, and preemption in the downlink. Preemption means that a transmission with already allocated resources is stopped and the already allocated resources are used for another transmission with a later requested lower latency / higher priority. Therefore, a previously allowed transmission is preempted by a later transmission. Preemption is applicable regardless of the specific service type. For example, a transmission of service type A (URLLC) may be preempted by a transmission of service type B (eMBB, etc.). Technology enhancements for reliability improvement include a dedicated CQI / MCS table for a target BLER of 1E-5.

[0182] The use case of mMTC (massive machine type communication) is characterized by a very large number of connected devices that typically transmit relatively small amounts of data that are not sensitive to delays. These devices are required to be low-cost and have very long battery life. From the NR perspective, utilizing very narrow bandwidth portions is one solution that saves power and extends battery life from the UE's perspective.

[0183] As mentioned above, the scope of reliability improvement in NR is expected to be broader. One of the key requirements for all cases, for example, URLLC and mMTC, is high or ultra-high reliability. Several mechanisms can improve reliability from a radio perspective and a network perspective. Generally, there are two to three key areas that can help improve reliability. These areas include compact control channel information, repetition of data channels / control channels, and diversity in the frequency, time, and / or spatial domains. These areas are generally applicable to reliability improvement regardless of the specific communication scenario.

[0184] For NR URLLC, further use cases with more stringent requirements are envisaged, such as factory automation, transportation, and power distribution, such as high reliability (up to 10-6 level), high availability, packet size up to 256 bytes, time synchronization down to a few μs (depending on the use case, the value can be 1 μs or a few μs depending on the frequency range and low latency in the order of 0.5 ms to 1 ms (e.g., 0.5 ms latency on the targeted user plane)).

[0185] Furthermore, for NR URLLC, there may be several technical enhancements from the physical layer perspective. These technical enhancements include PDCCH (Physical Downlink Control Channel) enhancements for compact DCI, PDCCH repetition, and increased PDCCH monitoring. Also, UCI (Uplink Control Information) enhancements relate to enhanced Hybrid Automatic Repeat Request (HARQ) and CSI feedback enhancements. There may also be PUSCH enhancements related to minislot-level hopping and retransmission / repetition enhancements. The term "minislot" refers to a Transmission Time Interval (TTI) that contains fewer symbols than a slot (a slot comprises 14 symbols).

[0186] <QoS Control> The 5G Quality of Service (QoS) model is based on QoS flows and supports both QoS flows that require a guaranteed flow bit rate (Guaranteed Bit Rate QoS flows (GBR)) and QoS flows that do not require a guaranteed flow bit rate (non-GBR QoS flows). Thus, at the NAS level, a QoS flow is the finest granularity of QoS classification in a PDU session. A QoS flow is identified within a PDU session by a QoS Flow ID (QFI) carried in an encapsulation header over the NG-U interface.

[0187] For each UE, 5GC establishes one or more PDU sessions. For each UE, the NG-RAN establishes at least one Data Radio Bearer (DRB) for each PDU session, e.g., as shown above with reference to Figure 16. Additional DRBs for the QoS flows of that PDU session can be configured later (when this is up to the NG-RAN). The NG-RAN maps packets belonging to different PDU sessions to different DRBs. NAS-level packet filters in the UE and 5GC associate UL and DL packets with QoS flows, while AS-level mapping rules in the UE and NG-RAN associate UL and DL QoS flows with DRBs.

[0188] Figure 18 shows the non-roaming reference architecture for 5G NR (see TS 23.501 v16.1.0, section 4.23). An Application Function (AF) (e.g., an external application server hosting 5G services, as illustrated in Figure 17) interacts with the 3GPP core network to provide services. For example, it may access a Network Exposure Function (NEF) to support applications that affect traffic routing, or interact with a policy framework for policy control (e.g., QoS control) (see Policy Control Function (PCF)). Based on operator deployment, Application Functions considered trusted by the operator can interact directly with associated Network Functions. Application Functions not authorized by the operator to directly access Network Functions interact with associated Network Functions using an external exposure framework via the NEF.

[0189] Figure 18 further illustrates further functional units of the 5G architecture, namely, Network Slice Selection Function (NSSF), Network Repository Function (NRF), Unified Data Management (UDM), Authentication Server Function (AUSF), Access and Mobility Management Function (AMF), Session Management Function (SMF), and Data Network (DN, e.g., operator-provided services, Internet access, or third-party services). All or part of the core network functions and application services may be deployed and run in a cloud computing environment.

[0190] Therefore, the present disclosure provides an application server (e.g., an AF in a 5G architecture) comprising: a transmitter that, in operation, sends a request including QoS requirements for at least one of a URLLC service, an eMMB service, and an mMTC service to at least one of 5GC functions (e.g., an NEF, an AMF, an SMF, a PCF, an UPF, etc.) to establish a PDU session including a radio bearer between a gNodeB and a UE according to the QoS requirements; and a control circuit that, in operation, performs a service using the established PDU session.

[0191] The term "portion" used in this disclosure may be interchangeably used with other terms such as "circuitry," "device," "unit," or "module."

[0192] The present disclosure can be realized by software, hardware, or software in conjunction with hardware. Each functional block used in the description of the above embodiments may be partially or entirely realized as an LSI, which is an integrated circuit, and each process described in the above embodiments may be partially or entirely controlled by a single LSI or a combination of LSIs. The LSI may be composed of individual chips, or may be composed of a single chip that includes some or all of the functional blocks. The LSI may have data input and output. Depending on the degree of integration, the LSI may also be called an IC, system LSI, super LSI, or ultra LSI.

[0193] The integrated circuit method is not limited to LSI, and may be realized by a dedicated circuit, a general-purpose processor, or a dedicated processor. Also, a field programmable gate array (FPGA) that can be programmed after LSI manufacturing, or a reconfigurable processor that can reconfigure the connections and settings of circuit cells within the LSI, may be used. The present disclosure may be realized as digital processing or analog processing.

[0194] Furthermore, if an integrated circuit technology that can replace LSI emerges due to advances in semiconductor technology or other derivative technologies, it is natural that such technology may be used to integrate functional blocks. The application of biotechnology, etc. is also a possibility.

[0195] The present disclosure may be implemented in any type of apparatus, device, or system (collectively referred to as a communications apparatus) that has a communications function. The communications apparatus may include a radio transceiver and processing / control circuitry. The radio transceiver may include a receiver and a transmitter, or both functions. The radio transceiver (transmitter and receiver) may include a radio frequency (RF) module and one or more antennas. The RF module may include an amplifier, an RF modulator / demodulator, or the like. Non-limiting examples of communication devices include telephones (e.g., cell phones, smartphones), tablets, personal computers (PCs) (e.g., laptops, desktops, notebooks), cameras (e.g., digital still / video cameras), digital players (e.g., digital audio / video players), wearable devices (e.g., wearable cameras, smartwatches, tracking devices), game consoles, digital book readers, telehealth / telemedicine devices, communication-enabled vehicles or mobile transportation (e.g., cars, airplanes, ships), and combinations of the above devices.

[0196] The communication devices are not limited to portable or mobile devices, but also include any kind of non-portable or fixed equipment, devices, and systems, such as smart home devices (such as home appliances, lighting equipment, smart meters or measuring devices, control panels, etc.), vending machines, and any other "things" that may exist on an IoT (Internet of Things) network.

[0197] Communications include data communications via cellular systems, wireless LAN systems, communication satellite systems, and the like, as well as data communications via combinations of these.

[0198] A communications apparatus also includes devices such as controllers and sensors connected or coupled to a communications device that performs the communications functions described in this disclosure, such as controllers and sensors that generate control and data signals used by the communications device to perform the communications functions of the communications apparatus.

[0199] The communication apparatus also includes infrastructure facilities, such as base stations, access points, and any other apparatus, device, or system that communicates with or controls the various apparatuses listed above, but are not limited to these.

[0200] A terminal according to one embodiment of the present disclosure includes a control circuit that determines first information regarding surplus power for a first transmission setting set in the terminal and second information regarding surplus power for a second transmission setting that is not set in the terminal, and a transmission circuit that transmits the first information and the second information.

[0201] In one embodiment of the present disclosure, the second information includes information regarding a maximum transmission power in the second transmission configuration.

[0202] In one embodiment of the present disclosure, the second transmission setting includes a transmission waveform setting.

[0203] In one embodiment of the present disclosure, the second transmission configuration includes at least one configuration of a modulation scheme, a number of allocated resource blocks, and a location of allocated resource blocks.

[0204] In one embodiment of the present disclosure, when dynamic switching of an uplink transmission waveform is enabled, the transmission circuit transmits the first information using a first Medium Access Control-Control Element (MAC CE) and transmits the second information using a second MAC CE having the same configuration as the first MAC CE.

[0205] In one embodiment of the present disclosure, when dynamic switching of an uplink transmission waveform is enabled, the transmission circuit transmits the second information using a second Medium Access Control-Control Element (MAC CE) obtained by adding an n-byte (n is a positive integer) field to a first MAC CE for transmitting the first information.

[0206] In one embodiment of the present disclosure, when dynamic switching of an uplink transmission waveform is enabled, the transmission circuit transmits the second information using a part of a field of a Medium Access Control-Control Element (MAC CE) for transmitting the first information.

[0207] In one embodiment of the present disclosure, the transmission circuit transmits the second information using uplink control information (UCI) multiplexed onto an uplink shared channel or the UCI on an uplink control channel.

[0208] In one embodiment of the present disclosure, the condition that triggers the feedback of the second information is the same as the condition that triggers the feedback of the first information.

[0209] In one embodiment of the present disclosure, the condition that triggers the feedback of the second information is different from the condition that triggers the feedback of the first information.

[0210] In one embodiment of the present disclosure, the condition is at least one of a condition based on a timer related to the period for feeding back the second information, a condition based on the path loss in the second transmission setting, and a condition based on the difference between the excess transmission power in the first transmission setting and the excess transmission power in the second transmission setting.

[0211] In one embodiment of the present disclosure, whether or not to feed back the second information is notified to the terminal by downlink control information.

[0212] A base station according to one embodiment of the present disclosure includes a control circuit that determines information regarding reception of first information regarding surplus power for a first transmission setting set in a terminal and second information regarding surplus power for a second transmission setting that is not set in the terminal, and a receiving circuit that receives the first information and the second information based on the information regarding the reception.

[0213] In a communication method according to one embodiment of the present disclosure, a terminal determines first information regarding surplus power for a first transmission setting set in the terminal and second information regarding surplus power for a second transmission setting not set in the terminal, and transmits the first information and the second information.

[0214] In a communication method according to one embodiment of the present disclosure, a base station determines information regarding reception of first information regarding surplus power for a first transmission setting set in a terminal and second information regarding surplus power for a second transmission setting not set in the terminal, and receives the first information and the second information based on the information regarding the reception.

[0215] The disclosures of the specification, drawings and abstract contained in Japanese Patent Application No. 2022-180343, filed on November 10, 2022, are incorporated herein by reference in their entirety.

[0216] One embodiment of the present disclosure is useful in wireless communication systems.

[0217] 100 Base station 101, 205 Control unit 102 Upper control signal generation unit 103 Downlink control information generation unit 104, 206 Encoding unit 105, 207 Modulation unit 106, 208 Signal allocation unit 107, 209 Transmission unit 108, 201 Reception unit 109, 202 Extraction unit 110, 203 Demodulation unit 111, 204 Decoding unit 200 Terminal

Claims

1. A control circuit that determines first information regarding surplus power for a first transmission setting configured on the terminal, and second information regarding maximum transmission power for a second transmission setting not configured on the terminal, A transmitting circuit that transmits the first information and the second information, A terminal equipped with the following.

2. The second information includes a field that indicates whether or not it includes information regarding the maximum transmit power in the second transmit setting. The terminal according to claim 1.

3. The second transmission setting includes setting the transmission waveform, The terminal according to claim 1.

4. The parameters used to calculate the maximum transmission power in the second transmission setting are the same as the parameters used to calculate the maximum transmission power in the first transmission setting. The terminal according to claim 3.

5. The control circuit calculates the maximum transmission power in the second transmission setting when the second transmission setting supports the first transmission setting. The terminal according to claim 1.

6. When dynamic switching of the uplink transmission waveform is enabled, the transmission circuit transmits the second information using a second MAC CE, which is a first Medium Access Control-Control Element (MAC CE) for transmitting the first information with an additional n-byte (where n is a positive integer) field. The terminal according to claim 1.

7. When dynamic switching of the uplink transmission waveform is enabled, the number of bits in the Medium Access Control-Control Element (MAC CE) field for transmitting information regarding the maximum transmission power in the first transmission setting from the first information and the number of bits in the MAC CE field for transmitting information regarding the maximum transmission power in the second transmission setting from the second information are both 6 bits. The terminal according to claim 1.

8. Of the n bytes, the fields other than the MAC CE field for transmitting information regarding the maximum transmit power in the second transmit setting are Reserved bits. The terminal according to claim 6.

9. The conditions for triggering the feedback of the second piece of information are the same as the conditions for triggering the feedback of the first piece of information. The terminal according to claim 1.

10. The condition for triggering feedback of the first information and the second information is when the phy-PeriodicTimer expires. The terminal according to claim 9.

11. The device is, Determine first information regarding surplus power for a first transmission setting configured on the terminal, and second information regarding maximum transmission power for a second transmission setting not configured on the terminal. The first information and the second information are transmitted. Communication method.

12. A control circuit that determines first information relating to surplus power for a first transmission setting set on a terminal, and second information relating to maximum transmission power for a second transmission setting not set on the terminal, A transmitting circuit that transmits the first information and the second information, An integrated circuit comprising the following: