Communication device and communication method

Abstract

The present invention appropriately controls the transmission power of an uplink signal. A terminal according to the present invention comprises: a control circuit that sets the transmission power of a second signal on the basis of the types of time resources of a first signal and the second signal, the first signal being transmitted in either a first type of time resource in which a frequency band is divided into a plurality of bands or a second type of time resource different from the first type, and the second signal being transmitted after the first signal; and a transmission circuit that transmits the second signal by using the transmission power.

Description

Communication equipment and communication methods

[0001] This disclosure relates to communication devices and communication methods.

[0002] The 3rd Generation Partnership Project (3GPP) has completed the specification of the physical layer for Release 18 NR (New Radio access technology) as an enhancement to the functionality of 5th Generation mobile communication systems (5G). NR supports enhanced Mobile Broadband (eMBB) and ultra-reliable and low-latency communication (URLLC) to meet requirements such as high speed and large capacity (see, for example, Non-Patent Documents 1-6).

[0003] 3GPP TS 38.211 V18.5.0, "Physical channels and modulation (Release 18)", Dec. 20243GPP TS 38.212 V18.5.0, "Multiplexing and channel coding (Release 18)", Dec. 20243GPP TS 38.213 V18.5.0, "Physical layer 20243GPP TS 38.331 V18.4.0, "Radio Resource Control (RRC) protocol specification (Release 18)", Dec. 20243GPP TS 38.331 V18.4.0, "Radio Resource Control (RRC) protocol specification (Release 18)", Dec. 20243GPP TS 38.321 V18.4.0, "Medium Access Control (MAC) protocol specification (Release 18)", Dec. 2024

[0004] However, there is room for further consideration regarding the method of controlling the transmission power of the uplink signal.

[0005] Non-limiting embodiments of this disclosure contribute to providing a communication device and communication method that can appropriately control the transmission power of an uplink signal.

[0006] A communication device according to one embodiment of the present disclosure comprises a control circuit that sets the transmission power of a second signal based on the type of time resource of a first type of time resource in which the frequency band is divided into a plurality of bands, and a second type of time resource different from the first type, and a transmission circuit that transmits the second signal using the transmission power.

[0007] These comprehensive or specific embodiments may be implemented as systems, devices, methods, integrated circuits, computer programs, or recording media, or as any combination of systems, devices, methods, integrated circuits, computer programs, and recording media.

[0008] According to one embodiment of the present disclosure, the transmission power of the uplink signal can be appropriately controlled.

[0009] Further advantages and effects of one embodiment of this disclosure will be made apparent from the specification and drawings. Such advantages and / or effects are provided by several embodiments and features described in the specification and drawings, but not all of them are necessarily provided in order to obtain one or more identical features.

[0010] Figure 3: Example of Duplex configuration Figure 4: Example of slot configuration Figure 5: Example of Random Access Channel occasion (RO) placement Figure 6: Example of symbol type combination for Physical Random Access Channel (PRACH) and Msg3 Figure 7: Block diagram showing a partial base station configuration example Block diagram showing a partial terminal configuration example Block diagram showing a base station configuration example Block diagram showing a terminal configuration example Sequence diagram showing base station and terminal operation example Figure 8: Example of TPC (Transmission Power Control) command table Figure 9: Example of initial transmission and retransmission of Msg3 Figure 10: 3: Exemplary architecture of a GPP NR system Figure 11: Exemplary functional partitioning in G O-RAN

[0011] Embodiments of this disclosure will be described in detail below with reference to the drawings.

[0012] [Regarding Subband Non-Overlapping Full Duplex (SBFD)] As a Study Item for Release 18, "Study on evolution of NR duplex operation" was discussed. One of the main topics of this Study Item was support for subband non-overlapping full duplex (also called SBFD or Cross Division Duplex (XDD)). Based on the results of the feasibility study in Release 18, it was decided to formalize the SBFD specification in Release 19.

[0013] Figure 1 shows an example of a duplex scheme. In Figure 1, the vertical axis represents frequency and the horizontal axis represents time. Also, in Figure 1, "U" indicates uplink transmission and "D" indicates downlink transmission.

[0014] Figure 1(a) shows an example of a half-duplex Time Division Duplex (TDD). In Figure 1(a), the terminal (UE: User Equipment) is a terminal connected to a base station (e.g., gNB). In the half-duplex shown in Figure 1(a), the transmission direction (e.g., downlink or uplink) for a given time resource may be the same between the base station and the terminal. For example, the transmission direction for a given time resource will not differ between terminals.

[0015] Figure 1(b) shows an example of SBFD. In SBFD, a frequency resource (or frequency band) is divided into multiple bands (e.g., subbands, RB sets, subbands, or sub-BWPs (Bandwidth Parts)), and transmission in different directions (e.g., downlink or uplink) is supported on a subband basis. In SBFD, a terminal performs transmission and reception in either the uplink or downlink at a given time resource, and does not perform transmission and reception in the other direction. On the other hand, in SBFD, a base station can transmit and receive on both the uplink and downlink simultaneously. There may be cases where a terminal does not use a resource in a transmission direction at a given time resource (e.g., the resource shown by the dotted line in Figure 1(b)).

[0016] Although not shown in Figure 1, a guard band may be placed between the uplink subband (UL subband: U) and the downlink subband (DL subband: D). The guard band may be used to reduce cross-link interference (CLI) between different transmission directions (links).

[0017] In the following explanation, symbols on which SBFD operation or control is performed will be referred to as "SBFD symbols." Symbols on which SBFD operation or control is not performed (for example, symbols different from SBFD symbols) may also be referred to as "non-SBFD symbols." Furthermore, a slot composed of SBFD symbols may be referred to as an "SBFD slot," and a slot composed of non-SBFD symbols may be referred to as a "non-SBFD slot."

[0018] Furthermore, the subband configuration is notated as {X…X}, where X represents the UL subband (U) or DL ​​subband (D). The order of notation corresponds to the order in which the subbands are arranged. For example, the subband configuration in Figure 1(b) is notated as {DUD}.

[0019] [About SBFD Symbols and SBFD-Compatible Terminals] SBFD-compatible terminals (also called, for example, SBFD-aware UEs) are terminals that support SBFD operation and control. SBFD-compatible terminals can obtain SBFD-related settings, such as the position in the frequency and time domains of subbands. Non-SBFD-compatible terminals (also called non-SBFD-aware UEs) are terminals that do not support SBFD operation and control. Non-SBFD-compatible terminals, for example, do not recognize SBFD symbols, and therefore, even if an existing symbol (e.g., a non-SBFD symbol) is set (or changed) to an SBFD symbol, the terminal will recognize that symbol as an existing symbol and operate accordingly.

[0020] SBFD symbols may be configured, for example, by using (or replacing / modifying) existing symbols. For example, upon notification from a base station, an SBFD-enabled terminal may reconfigure some or all of its existing symbols as SBFD symbols and operate accordingly. Existing symbols include DL symbols, UL symbols, and Flexible symbols. For example, SBFD symbols may be configured using DL symbols. Existing symbols are configured, for example, by RRC signaling (e.g., TDD-UL-DL-ConfigCommon). Here, non-SBFD symbols are, for example, symbols that are not SBFD symbols (e.g., existing symbols that are not used as SBFD symbols).

[0021] Figure 2 shows an example of a slot configuration.

[0022] Figure 2(a) shows an example of a slot configuration in a terminal that does not support SBFD. In the example in Figure 2(a), the TDD UL-DL pattern period (the period in which the TDD slot configuration pattern is repeated) is 5 slots, where "D" represents a DL slot composed of DL symbols, "F" represents a Flexible slot composed of Flexible symbols, and "U" represents a UL slot composed of UL symbols.

[0023] Figure 2(b) shows an example of a slot configuration in an SBFD-compatible terminal. In the example in Figure 2(b), Slots #1, #2, #3, and #6 are SBFD slots composed of SBFD symbols. The subband configuration of each SBFD slot is {DUD}. The SBFD time period shown in Figure 2(b) (the period during which the SBFD slot configuration pattern is repeated) is 5 slots, similar to the TDD UL-DL pattern period shown in Figure 2(a).

[0024] Non-SBFD compatible terminals and SBFD compatible terminals may share symbols. For example, in Figure 2, in slot #1, non-SBFD compatible terminals may recognize it as a DL slot, and SBFD compatible terminals may recognize it as an SBFD slot, and then transmit and receive data. Note that in the example in Figure 2, for simplicity, the case where the symbol types included in the slot are the same was explained, but this is not the only case, and different symbol types (for example, SBFD symbols and UL symbols) may be mixed within a slot.

[0025] [RO (Random access occasion)] In random access under SBFD, two types of RO (Random access occasion) may be used: "Legacy-RO" and "Additional-RO".

[0026] Legacy-RO is an existing RO that can be used by both SBFD-compatible and non-SBFD-compatible terminals. Legacy-RO may be assigned to, for example, non-SBFD symbols. Furthermore, Legacy-RO may be assigned to, for example, SBFD symbols whose base is a Flexible symbol.

[0027] An Additional-RO is an additional RO for SBFD, used by SBFD-compatible terminals and not used by non-SBFD-compatible terminals. An Additional-RO may be assigned to an SBFD symbol.

[0028] Figure 3 shows an example of RO allocation. The slot configuration in Figure 3(a) and (b) is the same as the slot configuration shown in Figure 2(a) and (b). Legacy-ROs are allocated to Slot #3 and Slot #4 shown in Figure 3. For example, the Legacy-RO in slot #3 is located within the UL subband and can be used by both SBFD-compatible and non-SBFD-compatible terminals. Additionally, Additional-ROs are allocated to slot #1 and slot #2 shown in Figure 3. Additional-ROs can be used by SBFD-compatible terminals but not by non-SBFD-compatible terminals.

[0029] [Calculation formula for Msg3 transmission power] As the transmission power of Msg3 (also referred to as Msg3 PUSCH (Physical Uplink Shared Channel) for example) in the random access procedure, the following calculation formula may be assumed. An example of a method for controlling the transmission power based on this calculation formula in SBFD will be described later.

[0030] Here, corresponds to the target reception power. For example, in the case of Msg3 scaled by the UL grant (UL scheduling information) included in the RAR (Random Access Response) (also called Msg2), j = 0, and it is.

[0031] P O_PRE is the target reception power of the PRACH (Physical Random Access Channel, also called Msg1). The target reception power P of the PRACH O_PRE may be set by, for example, the upper layer parameter preambleReceivedTargetPower. The target reception power P of the PRACH O_PRE may be set individually or commonly for Legacy - RO and Additional - RO.

[0032] Δ PREAMBLE_Msg3 is the power offset between Msg3 and PRACH. The power offset Δ PREAMBLE_Msg3 may be set by, for example, the upper layer parameter msg3 - DeltaPreamble or deltaPreamble. The power offset Δ PREAMBLE_Msg3 may be set individually or commonly for SBFD symbols and non - SBFD symbols.

[0033] is the power offset based on the bandwidth of the PUSCH resource.

[0034] PL b,f,c (q d ) is the path loss [dB], αb,f,c (j) is the path loss compensation factor. In the case of Msg3, when the parameter msg3-Alpha of the upper layer is set, α b,f,c (j) = msg3-Alpha, and when msg3-Alpha is not set, α b,f,c (j) = 1.

[0035] Δ TF,b,f,c (i) is the MCS (Modulation and Coding Scheme) offset [dB].

[0036] f b,f,c (i.l) is the power adjustment value. For example, in the case of Msg3 scheduled by RAR UL grant, it is given by the following formula.

[0037] ΔP rampup,b,f,c corresponds to the power of power ramping. The power of power ramping ΔP rampup,b,f,c may be determined by the ramping step width (which may be set by the parameter powerRampingStep or powerRampingStepHighPriority of the upper layer) and the maximum number of transmissions of PRACH (which may be set by the parameter preambleTransMax of the upper layer), etc. The ramping step width and the maximum number of transmissions of PRACH may be set individually for Legacy-RO and Additional-RO, or may be set commonly.

[0038] δmsg2,b,f,c is the transmission power control (TPC: Transmission Power Control) command value indicated by RAR UL grant.

[0039] [Relationship between PRACH and Msg3] Interference between subbands can occur with SBFD symbols. For example, to reduce interference to DL reception in the DL subband, the UL transmit power of SBFD symbols may be set lower compared to non-SBFD symbols. On the other hand, in environments with interference from the DL subband, the UL transmit power of SBFD symbols may be set higher compared to non-SBFD symbols to improve UL reception quality at base stations in the UL subband.

[0040] The Msg3 transmit power is calculated based on the PRACH transmit power. For example, the Msg3 transmit power is calculated based on the PRACH preampl target receive power and the PRACH power ramping. As mentioned above, the transmit power setting may differ depending on the symbol type, so in SBFD, if the symbol types for PRACH and Msg3 are different, the Msg3 transmit power may not be set correctly.

[0041] If the transmission power of Msg3 is not properly controlled, for example, if the transmission power of Msg3 is too high, interference from Msg3 may increase. In this case, for example, if Msg3 is transmitted in the UL subband with SBFD symbols, interference to the DL subband may increase, affecting DL reception at other terminals. Also, if Msg3 is transmitted with UL symbols, for example, interference to other cells may increase, affecting UL reception at the base station.

[0042] Furthermore, if the transmission power of Msg3 is not properly controlled, for example, if the transmission power of Msg3 is too low, the reception quality may fall below what is expected for UL reception by the base station, and the base station may not be able to properly receive Msg3.

[0043] As described above, it is expected that the transmission power will be set appropriately for Msg3.

[0044] For example, as shown in Figure 4, the following cases are possible for the combination of symbol types between PRACH and Msg3: Case 1: PRACH is a non-SBFD symbol and is transmitted using Legacy-RO, and Msg3 is transmitted using a non-SBFD symbol. Case 2: PRACH is an SBFD symbol and is transmitted using Additional-RO, and Msg3 is transmitted using an SBFD symbol. Case 3: PRACH is an SBFD symbol and is transmitted using Legacy-RO, and Msg3 is transmitted using a non-SBFD symbol. Case 4: PRACH is a non-SBFD symbol and is transmitted using Legacy-RO, and Msg3 is transmitted using an SBFD symbol. Case 5: PRACH is an SBFD symbol and is transmitted using Additional-RO, and Msg3 is transmitted using a non-SBFD symbol. Case 6: PRACH is an SBFD symbol and is transmitted using Legacy-RO, and Msg3 is transmitted using an SBFD symbol.

[0045] For example, in Case 1 shown in Figure 4, the terminal sends PRACH using the Legacy-RO located in the UL slot of slot 4, receives RAR in slot 10, and sends Msg3 using the UL slot of slot 14.

[0046] Furthermore, in Case 2 and Case 5 shown in Figure 4, PRACH is transmitted using Additional-RO, while in Case 3 and Case 6, PRACH is transmitted using Legacy-RO.

[0047] Furthermore, in Case 1 and Case 2 shown in Figure 4, since PRACH and Msg3 are of the same symbol type, similar transmission power control is possible for both PRACH and Msg3, and therefore, adjusting the transmission power of Msg3 is expected to be relatively easy.

[0048] Furthermore, in Case 3 shown in Figure 4, although the symbol types of PRACH and Msg3 are different, both Msg3, which is transmitted with non-SBFD symbols, and PRACH, which is transmitted with SBFD symbols, are transmitted using Legacy-RO. Since Legacy-RO sets the transmission power for non-SBFD symbols for terminals that do not support SBFD, it is assumed that in Case 3, as in Case 1 and Case 2, it will be relatively easy to adjust the transmission power of Msg3, which is placed with non-SBFD symbols.

[0049] In other words, in the transmission power control of Msg3, in Case 1 and Case 3, the transmission power control parameters for non-SBFD symbols should be applied, while in Case 2, the transmission power control parameters for SBFD symbols should be applied.

[0050] On the other hand, in Cases 4 and 5 shown in Figure 4, the symbol types of PRACH and Msg3 are different, so there is room to consider how to apply the transmit power control parameters of Msg3.

[0051] Furthermore, in Case 6 shown in Figure 4, although the symbol types of PRACH and Msg3 are both SBFD symbols, PRACH is transmitted in Legacy-RO mode, and the transmit power parameters for non-SBFD symbols are set. Therefore, in Case 6, as in Cases 4 and 5, there is room to consider how to apply the transmit power control parameters of Msg3, which is placed on an SBFD symbol.

[0052] In the following explanation, cases like Case 1, Case 2, and Case 3 will be referred to as "cases where the target symbol types of PRACH and Msg3 are the same," while cases like Case 4, Case 5, and Case 6 will be referred to as "cases where the target symbol types of PRACH and Msg3 are different."

[0053] Furthermore, when it is written as "PRACH target symbol type," it refers to the symbol type that the parameter applied to PRACH (e.g., transmit power control parameter) is originally intended for, regardless of the symbol type actually being transmitted. For example, the PRACH target symbol type in Case 1, Case 3, Case 4, and Case 6 is a non-SBFD symbol, while the PRACH target symbol type in Case 2 and Case 5 is an SBFD symbol.

[0054] In non-limiting embodiments of this disclosure, a method for controlling the transmit power of Msg3 is described.

[0055] [Overview of the Communication System] A communication system according to one embodiment of the present disclosure may include, for example, a base station 100 (e.g., a gNB, corresponding to a communication device) as shown in Figures 5 and 7, and a terminal 200 (e.g., an UE, corresponding to a communication device) as shown in Figures 6 and 8. Multiple base stations 100s and terminals 200s may exist in the communication system.

[0056] Figure 5 is a block diagram showing a partial configuration example of a base station 100 according to one embodiment of the present disclosure. In the base station 100 shown in Figure 5, the control unit (e.g., corresponding to a control circuit) sets the transmission power of a second signal based on the type of time resource of a first signal (e.g., PRACH or initial transmission Msg3) and a second signal (e.g., Msg3 or retransmission Msg3) transmitted in either a first type of time resource (e.g., SBFD symbol) in which the frequency band is divided into multiple bands (e.g., subbands) or a second type of time resource (e.g., non-SBFD symbol) different from the first type. The receiving unit (e.g., corresponding to a receiving circuit) receives the second signal transmitted based on the transmission power.

[0057] Figure 6 is a block diagram showing a partial configuration example of a terminal 200 according to one embodiment of the present disclosure. In the terminal 200 shown in Figure 6, the control unit (corresponding to, for example, a control circuit) sets the transmission power of the second signal based on the type of time resource of the first signal (e.g., PRACH or initial transmission Msg3) and the second signal (e.g., Msg3 or retransmission Msg3) transmitted after the first signal, which are transmitted in either a first type of time resource (e.g., an SBFD symbol) in which the frequency band is divided into multiple bands (e.g., subbands), or a second type of time resource (e.g., a non-SBFD symbol) different from the first type. The transmitting unit (corresponding to, for example, a transmitting circuit) transmits the second signal using the transmission power.

[0058] [Base Station Configuration] Figure 7 is a block diagram showing an example configuration of a base station 100 according to one embodiment of the present disclosure. In Figure 7, the base station 100 includes a receiving unit 101, a demapping unit 102, a demodulation / decoding unit 103, a scheduling unit 104, a UL transmission power control unit 105, a control information holding unit 106, a data / control information generation unit 107, an encoding / modulation unit 108, a mapping unit 109, and a transmission unit 110.

[0059] For example, at least one of the demapping unit 102, demodulation / decoding unit 103, scheduling unit 104, UL transmission power control unit 105, control information holding unit 106, data / control information generation unit 107, encoding / modulation unit 108, and mapping unit 109 may be included in the control unit shown in Figure 5, and the receiving unit 101 may be included in the receiving unit shown in Figure 5.

[0060] The receiving unit 101 performs reception processing on the received signal received via the antenna, for example, such as down-conversion or A / D conversion, and outputs the processed received signal to the demapping unit 102.

[0061] The demapping unit 102 resource demapping the received signal (for example, the uplink signal) input from the receiving unit 101 and outputs the modulated signal to the demodulation / decoding unit 103.

[0062] The demodulation / decoding unit 103 demodulates and decodes the modulated signal input from the demapping unit 102, for example, and outputs the decoding result to the scheduling unit 104.

[0063] The scheduling unit 104 may, for example, perform scheduling for the terminals 200. Based on, for example, the decoding result input from the demodulation / decoding unit 103, the UL transmission power control information input from the UL transmission power control unit 105 (including, for example, parameters related to the transmission power of PRACH and parameters related to the transmission power of Msg3), and at least one of the control information input from the control information holding unit 106, the scheduling unit 104 schedules the transmission and reception of each terminal 200 and instructs the data / control information generation unit 107 to generate at least one of the data and control information. The scheduling unit 104 also instructs the data / control information generation unit 107 to transmit the UL transmission power control information input from the UL transmission power control unit 105 to the terminals 200 as signaling information. The scheduling unit 104 also outputs control information related to the terminals 200 to the control information holding unit 106.

[0064] The UL transmit power control unit 105 determines, for example, UL transmit power setting information (including parameters related to the transmit power of PRACH or parameters related to the transmit power of Msg3) based on control information (for example, information related to the slot configuration, information related to SBFD, and information related to PRACH) input from the control information holding unit 106. The UL transmit power control unit 105 outputs the determined PRACH setting information to the scheduling unit 104.

[0065] The control information holding unit 106 holds, for example, control information set for each terminal 200. The control information may include, for example, information regarding the slot configuration and information regarding SBFD. The control information holding unit 106 may output the held information to each component of the base station 100 (for example, the scheduling unit 104 and the UL transmission power control unit 105) as needed.

[0066] The data and control information generation unit 107 generates at least one of data and control information in accordance with instructions from, for example, the scheduling unit 104, and outputs a signal containing the generated data or control information to the encoding and modulation unit 108. The generated data may include, for example, signaling information from a higher layer (e.g., UL transmit power control information).

[0067] The encoding and modulation unit 108 encodes and modulates signals (e.g., data and control information) input from the data and control information generation unit 107, and outputs the modulated signal to the transmission unit 110.

[0068] The mapping unit 109, for example, performs resource mapping on the modulated signal input from the encoding / modulation unit 108 and outputs the transmission signal to the transmission unit 110.

[0069] The transmitting unit 110 performs transmission processing such as D / A conversion, upconversion, or amplification on the signal input from the mapping unit 109, and transmits the resulting wireless signal from the antenna to the terminal 200.

[0070] [Terminal Configuration] Figure 8 is a block diagram showing an example configuration of a terminal 200 according to one aspect of the present disclosure. In Figure 8, the terminal 200 includes a receiving unit 201, a demapping unit 202, a demodulation / decoding unit 203, a control unit 204, a control information holding unit 205, a transmission power control unit 206, a data / control information generation unit 207, an encoding / modulation unit 208, a mapping unit 209, and a transmission unit 210.

[0071] For example, at least one of the demapping unit 202, demodulation / decoding unit 203, control unit 204, control information holding unit 205, transmission power control unit 206, data / control information generation unit 207, encoding / modulation unit 208, and mapping unit 209 may be included in the control unit shown in Figure 6, and the transmission unit 210 may be included in the transmission unit shown in Figure 6.

[0072] The receiving unit 201 performs reception processing on the received signal received via the antenna, for example, such as down-conversion or A / D conversion, and outputs the processed received signal to the demapping unit 202.

[0073] The demapping unit 202, for example, resource demapping of the received signal input from the receiving unit 201, and outputs the modulated signal to the demodulation / decoding unit 203.

[0074] The demodulation / decoding unit 203 demodulates and decodes the modulated signal input from the demapping unit 202, for example, and outputs the decoding result to the control unit 204. The decoding result may include, for example, at least one of the signaling information of the upper layer and the downlink control information.

[0075] The control unit 204 may, for example, issue a generation instruction for at least one of data and control information based on the decoding result (e.g., data or control information) input from the demodulation / decoding unit 203 and the control information input from the control information holding unit 205. The control unit 204 may also, for example, instruct the transmit power control unit 206 to perform transmit power control for the uplink signal (e.g., including PRACH or Msg3) based on the decoding result (e.g., upper layer signaling information) input from the demodulation / decoding unit 203 or the control information input from the control information holding unit 205. The control unit 204 may also, for example, output control information related to the terminal 200 to the control information holding unit 205.

[0076] The control information holding unit 205, for example, holds control information input from the control unit 204 and outputs the held information to each component (for example, the control unit 204) as needed.

[0077] The transmit power control unit 206 generates a Preamble signal to be transmitted in PRACH (for example, the PRACH signal) according to instructions from the control unit 204 (or information regarding the slot configuration, information regarding SBFD, information regarding PRACH, information regarding Msg3), and outputs the generated Preamble signal to the mapping unit 209.

[0078] The data / control information generation unit 207 generates data or control information according to instructions from the control unit 204, for example, and outputs a signal containing the generated data or control information to the encoding / modulation unit 208.

[0079] The encoding and modulation unit 208 encodes and modulates the signal input from, for example, the data and control information generation unit 207, and outputs the modulated signal to the mapping unit 209.

[0080] The mapping unit 209 performs resource mapping on the modulated signal input from the encoding / modulation unit 208 and outputs the transmission signal to the transmission unit 210.

[0081] The transmitting unit 210 performs transmission processing such as D / A conversion, upconversion, or amplification on the signal input from the mapping unit 209, and transmits the resulting wireless signal from the antenna to the base station 100. At this time, the transmitting unit 210 sets the transmission power of the transmission signal based on the transmission power information input from the transmission power control unit 206.

[0082] [Operation of Base Station 100 and Terminal 200] An example of operation of the base station 100 and terminal 200 having the above configuration will be described below.

[0083] Figure 9 is a sequence diagram showing an example of the operation of the base station 100 and the terminal 200.

[0084] In Figure 9, the base station 100 determines, for example, the settings (configuration) related to SBFD and UL transmission power (S101).

[0085] The base station 100 transmits, for example, higher-layer signaling information including the determined configuration information to the terminal 200 (S102). The transmission of signaling information may be, for example, broadcast by System Information Block (SIB), or it may be notification by terminal-specific (individually terminal) signaling information.

[0086] Terminal 200 transmits PRACH based on configuration information included in the signaling information transmitted from base station 100 (S103).

[0087] Based on the received PRACH, the base station 100 transmits a RAR (e.g., Msg2) (S104).

[0088] Terminal 200 derives the transmission power of Msg3 based on the RAR UL grant and signaling information included in the received RAR (S105). Terminal 200 transmits Msg3 based on the derived transmission power (S106).

[0089] [Transmission Power Control Method] The transmission power control method in terminal 200 (for example, transmission power control unit 206) will be described below. Note that base station 100 (for example, UL transmission power control unit 105) may, for example, set the UL transmission power for terminal 200 based on the assumption of the transmission power control method implemented by terminal 200.

[0090] The following describes an example of a transmission power control method.

[0091] [Control Method 1] In the existing specifications, the UE uses the preamble target received power used for PRACH transmission. In this case, if the target symbol types of PRACH and Msg3 are different, the transmission power of Msg3 appropriate for the symbol type may not be set.

[0092] Therefore, in control method 1, terminal 200 calculates (or sets) the transmission power of Msg3 using the preamble target received power associated with the symbol type of Msg3.

[0093] For example, if multiple preamble target received powers are set for terminal 200, terminal 200 determines which of the multiple preamble target received powers to use. For example, when using the additional RACH settings for feature combinations introduced in Release 17, multiple preamble target received powers may be set. Any of the following association methods may be applied to determine which of the multiple preamble target received powers the symbol type of Msg3 should be associated with.

[0094] <Method 1 of association> In Method 1 of association, the preamble target receive power set in the basic RACH setting is used for the transmit power control of Msg3, rather than an additional RACH setting (for example, always used).

[0095] For example, instead of using rach-ConfigCommon-r17, which was introduced in Release 17, for the transmission power control of Msg3, the preamble target receive power set in rach-ConfigCommon, which was introduced in Release 15, may be set (associated).

[0096] In this way, by using the preamble target received power, which is used for settings for mandatory functions rather than optional functions, the preamble target received power can be uniquely associated with the transmit power control of Msg3.

[0097] Association method 1 allows for the unique determination of the parameters to be associated with Msg3, thereby simplifying the association process and reducing the complexity of terminal 200.

[0098] <Method 2 of association> In Method 2 of association, terminal 200 calculates the transmit power of Msg3 using the preamble target received power of the RACH setting set for the same function (or the same purpose).

[0099] For example, if a parameter for a specific feature combination (e.g., a PRACH indicating that Msg3 repetition is possible) is set for the target symbol type of PRACH, and the same feature combination as the target symbol type of PRACH is also set for the symbol type to which Msg3 is transmitted, the terminal 200 calculates the transmission power of Msg3 using the preamble target received power corresponding to that feature combination.

[0100] By using association method 2, terminal 200 can determine the transmission power of Msg3 using the same preamble target received power for feature combinations, and thus transmit Msg3 using a transmission power appropriate for the purpose of the feature combination.

[0101] <Association Method 3> In association method 3, the choice of which preamble target received power to use in the transmission power control of Msg3 is set quasi-statically.

[0102] For example, among several candidate preamble target received powers, the terminal 200 may be configured by higher-layer signaling (e.g., RRC signaling) to determine which preamble target received power to apply to the transmission power control of Msg3.

[0103] Alternatively, the value of the preamble target received power corresponding to the symbol type of Msg3 may be directly set in the terminal 200.

[0104] By using association method 3, terminal 200 can explicitly set the preamble target received power used for controlling the transmit power of Msg3, thereby improving the flexibility of adjusting the transmit power of Msg3.

[0105] <Association Method 4> In association method 4, the choice of which preamble target received power to use in the transmission power control of Msg3 is dynamically set using RAR UL grant.

[0106] For example, the terminal 200 may be notified using a field in the RAR UL grant which of several candidate preamble target received powers to apply to the transmit power control of Msg3. Candidate preamble target received powers may be set in the terminal 200, for example, by signaling at a higher layer, or they may be predefined.

[0107] For example, if there are two candidates for the preamble target received power, a new 1-bit field may be added to the RAR UL grant. For example, the value of 0 or 1, indicated by the 1-bit value, may indicate which of the two candidates to use. Alternatively, for example, an SBFD-compatible terminal may reinterpret an existing field in the RAR to be the field that indicates the preamble target received power. The existing field may be, for example, the "CSI request field," or any other field.

[0108] By using association method 4, the preamble target received power can be set dynamically, thereby improving the flexibility of adjusting the transmit power of Msg3.

[0109] The above explains how to associate the symbol type of Msg3 with the preamble target received power.

[0110] Furthermore, as in association methods 3 and 4, the notification or setting of the preamble target received power is not limited to upper-layer signaling and RAR UL grant (MAC CE), but may also be other control information (e.g., DCI).

[0111] Thus, according to control method 1, terminal 200 can set a transmission power suitable for the symbol type of Msg3 by setting the transmission power of Msg3 using the preamble target received power associated with the symbol type of Msg3. By transmitting Msg3 with appropriate transmission power, terminal 200 can reduce interference caused by Msg3 and improve the reception performance at base station 100.

[0112] [Control Method 2] In Control Method 2, terminal 200 calculates the transmission power of Msg3 using the preamble target received power used for PRACH transmission.

[0113] If the target symbol types for PRACH and Msg3 are different, the appropriate transmission power may not be set for the symbol type. Therefore, when the target symbol types for PRACH and Msg3 are different, terminal 200 adjusts the preamble target received power used for Msg3's transmission power using the preamble target received power and power offset used for PRACH transmission.

[0114] Any of the following methods may be applied to set the power offset.

[0115] <Setting Method 1> In Setting Method 1, the power offset is set quasi-statically. For example, the power offset may be set on terminal 200 by signaling from a higher layer.

[0116] The power offset can be set differently or the same in each of the three cases shown in Figure 4: Case 4, Case 5, and Case 6. When the power offset is set differently, the appropriate transmission power for Msg3 can be set for each case. On the other hand, when the power offset is set to the same value, the signaling overhead for power offset notification can be reduced.

[0117] In setting method 1, the terminal 200 can explicitly adjust the target received power using a quasi-statically set power offset, thereby improving the flexibility of adjusting the transmit power of Msg3.

[0118] <Setting Method 2> In Setting Method 2, the power offset is dynamically set using RAR UL grant.

[0119] The base station 100 may, for example, notify the terminal 200 which of the multiple candidate power offsets to apply using a field in the RAR UL grant.

[0120] Candidate power offsets may be set on terminal 200 by signaling at a higher layer, for example, or they may be predefined. For example, if there are two candidates for the power offset, a new 1-bit field may be added to the RAR UL grant. Alternatively, for example, an SBFD-enabled terminal may reinterpret an existing field in the RAR as a field that notifies the preamble target received power. The existing field may be, for example, the "CSI request field," or another field.

[0121] By using setting method 2, the power offset can be set dynamically, thereby improving the flexibility of adjusting the transmission power of Msg3.

[0122] <Setting Method 3> In setting method 3, terminal 200 derives the power offset using other power control parameters.

[0123] For example, the power offset may be derived based on the difference between the PUSCH target received power for an SBFD symbol ("P0_SBFD") and the PUSCH target received power for a non-SBFD symbol ("P0_non-SBFD"). For example, in Case 5 (for example, when PRACH is transmitted using an SBFD symbol and Additional-RO, and Msg3 is transmitted using a non-SBFD symbol), if P0_non-SBFD is 3 dB higher than P0_SBFD, a power offset of 3 dB may be derived, and 3 dB may be added to the transmitted power of Msg3.

[0124] Alternatively, for example, the power offset may be derived based on the difference between the preamble target received power of Additional-RO and the preamble target received power of Legacy-RO.

[0125] By using setting method 3, additional signaling for power offsetting is unnecessary, thus reducing signaling overhead.

[0126] The above explains an example of how to set a power offset.

[0127] Thus, in control method 2, when the target symbol types of PRACH and Msg3 are different, terminal 200 adjusts the Msg3 transmission power using a power offset relative to the preamble target received power. This allows terminal 200 to set a transmission power appropriate for the symbol type. By transmitting Msg3 with appropriate transmission power, terminal 200 can reduce interference caused by Msg3 and improve the reception quality at base station 100.

[0128] Furthermore, since control method 2 allows the application of existing operations (for example, the operation of calculating the Msg3 transmit power based on the preamble target received power used for PRACH transmission), the complexity of implementation can be reduced.

[0129] [Control Method 3] In Control Method 3, if the target symbol types of PRACH and Msg3 are different, terminal 200 adds a power offset to the power ramping power applied to Msg3. For example, if the target symbol types of PRACH and Msg3 are different, terminal 200 sets the transmission power of Msg3 using the power ramping power applied to the transmission power of Msg3 and the power offset.

[0130] If the target symbol types for PRACH and Msg3 are different, the power applied by PRACH's power ramping may differ. For example, with SBFD symbols, considering the interference caused by PRACH, the power of the initial PRACH transmission is set low, and it is assumed that the power will be gradually increased through power ramping. In this case, it is expected that the power ramping power will be higher compared to non-SBFD symbols.

[0131] Therefore, terminal 200 adjusts the power of power ramping using a power offset.

[0132] As a method for setting the power offset, any of setting methods 1, 2, or 3 in control method 2 may be applied. In setting method 3, for example, terminal 200 may derive the power offset based on parameters related to power ramping. For example, the power offset may be derived from the difference between the step width of power ramping for SBFD symbols and the step width of power ramping for non-SBFD symbols. For example, the difference in step widths may be set directly as the power offset, or the difference in step widths may be multiplied by a coefficient and set as the power offset.

[0133] Thus, according to control method 3, when the target symbol types of PRACH and Msg3 are different, terminal 200 adjusts the transmission power of Msg3 using the power ramping power offset. This allows terminal 200 to set a transmission power appropriate for the symbol type. By transmitting Msg3 with appropriate transmission power, terminal 200 can reduce interference caused by Msg3 and improve reception quality at base station 100.

[0134] [Control Method 4] In Control Method 4, if the target symbol types of PRACH and Msg3 are different, the power ramping power applied to Msg3 is calculated based on the power ramping parameters associated with the symbol type. For example, if the target symbol types of PRACH and Msg3 are different, terminal 200 sets the power ramping power applied to the transmission power of Msg3 based on the power ramping parameters associated with the target symbol type of Msg3.

[0135] For example, if the power ramping step size (e.g., the upper layer parameter powerRampingStep) differs between Additional-RO and Legacy-RO, terminal 200 may calculate the power ramping to be applied to Msg3 using the power ramping step size associated with the symbol type to which Msg3 is sent (e.g., the power ramping step size set to Additional-RO for SBFD symbols and Legacy-RO for non-SBFD symbols).

[0136] For example, terminal 200 may calculate the power ramping power to be applied to Msg3 as follows.

[0137] The conditions are that PRACH is transmitted using SBFD symbols and Additional-RO, while Msg3 is transmitted using non-SBFD symbols. Additionally, the power ramping step size for Additional-RO is 4 dB, and the power ramping step size for Legacy-RO is 2 dB. Furthermore, power ramping is performed three times during PRACH transmission.

[0138] In this case, the power ramping power in PRACH is 12 dB (4 dB × 3). When terminal 200 calculates the transmission power of Msg3, it uses the Legacy-RO power ramping step width (2 dB) and sets the power ramping power to 6 dB (2 dB × 3).

[0139] In this way, terminal 200 can adjust the transmission power of Msg3 by calculating the power ramping power using parameters associated with the symbol type of Msg3.

[0140] Furthermore, for example, when calculating the power for power ramping used in Msg3, the maximum number of PRACH retransmissions may be taken into consideration. For example, if power ramping is performed more times in PRACH transmission than the maximum number of transmissions associated with the symbol type of Msg3, terminal 200 may calculate the power for power ramping used in Msg3 using the number of such power rampings as the maximum number of transmissions. For example, in the above example, if the maximum number of transmissions in Legacy-RO is 2, terminal 200 may set the number of power rampings for Msg3 to 2 (the maximum number of transmissions) even if the number of power rampings in PRACH transmission is 3, and set the ramp-up power applied to Msg3 to 4 dB (2 dB × 2).

[0141] Thus, according to control method 4, when the target symbol types of PRACH and Msg3 are different, terminal 200 calculates the power ramping power to be applied to Msg3 based on the power ramping parameters associated with the symbol type of Msg3. This allows terminal 200 to set a transmission power appropriate for the symbol type of Msg3. By transmitting Msg3 with appropriate transmission power, terminal 200 can reduce interference caused by Msg3 and improve reception quality at base station 100.

[0142] [Control Method 5] In control method 5, if the target symbol types of PRACH and Msg3 are different, terminal 200 adjusts the transmission power of Msg3 by changing the interpretation of the TPC command. For example, if the target symbol types of PRACH and Msg3 are different, terminal 200 may adjust the transmission power of Msg3 using a value obtained by reinterpreting the value of the TPC command.

[0143] If the target symbol types for PRACH and Msg3 are different, it is assumed that terminal 200 adjusts the transmission power of Msg3 using the TPC command included in RAR UL grant. When the target symbol types for PRACH and Msg3 are different, the power used for adjustment may be greater compared to when the target symbol types are the same. This is because, as mentioned above, the transmission power of Msg3 depends on the transmission power of PRACH, while the appropriate transmission power differs between SBFD symbols and non-SBFD symbols due to interference. Therefore, the range of TPC values ​​included in RAR UL grant may not be sufficient.

[0144] Therefore, in control method 5, when the target symbol types of PRACH and Msg3 are different, the interpretation of the TPC command is made different to facilitate adjustment of the power of Msg3.

[0145] As an example of a method to change (reinterpret) the interpretation of a TPC command, the following method may be applied.

[0146] <Reinterpretation Method 1> In Reinterpretation Method 1, terminal 200 reinterprets the values ​​in the TPC command table.

[0147] For example, if the target symbol types for PRACH and Msg3 are different, terminal 200 will apply a different TPC command table (for example, a table defining power adjustment values ​​for TPC commands). The TPC command table may be predefined or it may be set in terminal 200 by signaling at a higher layer.

[0148] Figure 10 shows an example of a TPC command table.

[0149] The table on the left in Figure 10 shows, for example, an existing TPC command table for RAR UL grant, while the table on the right shows a TPC command table for cases where the target symbol types of PRACH and Msg3 are different. As shown in Figure 10, the range of configurable values ​​differs between the two TPC command tables. For example, the table on the right in Figure 10 has a wider range of TPC command values ​​compared to the table on the left in Figure 10. Note that the TPC command values ​​are just examples, and other values ​​may be set.

[0150] Furthermore, to expand the configurable range in the TPC command table, the number of bits in a TPC command may be increased (not shown). For example, while an existing TPC command has 3 bits (e.g., 8 combinations), a TPC command with 4 bits (maximum 16 combinations) may be used when the target symbol types of PRACH and Msg3 are different, by adding 1 bit. The additional bit may be a bit not used in RAR UL grant, or it may be used by reinterpreting an existing field. Alternatively, the number of bits in a TPC command may be increased by increasing the payload size of RAR UL grant. Increasing the number of bits in a TPC command expands the configurable range while maintaining the granularity adjustable by TPC. For example, the TPC command example on the left of Figure 10 allows configuration in 2 dB increments, while the TPC command example on the right of Figure 10 (reinterpreted table) allows configuration in 3 dB increments. In contrast, by increasing the number of bits in the TPC command of the reinterpreted table, it becomes possible to expand the configurable range while maintaining 2 dB increments.

[0151] In reinterpretation method 1, the range of settings that can be configured by TPC commands can be flexibly changed by altering the interpretation of the TPC command table.

[0152] <Reinterpretation Method 2> In Reinterpretation Method 2, a scaling factor is applied to the TPC value.

[0153] If the target symbol types for PRACH and Msg3 are different, the scaling factor is multiplied or added to the TPC value.

[0154] For example, if the value notified by the TPC command is -2 dB and the scaling factor (multiplication) is 2, the reinterpreted TPC value will be set to -4 dB (-2 dB × 2).

[0155] Reinterpretation method 2 allows the use of existing TPC command tables, thereby reducing implementation complexity and signaling overhead. In other words, reinterpretation method 2 does not require the implementation and configuration of multiple TPC command tables.

[0156] The above explains an example of how to reinterpret TPC commands.

[0157] Thus, according to control method 5, when the target symbol types of PRACH and Msg3 are different, terminal 200 changes the interpretation of the TPC command to adjust the transmission power of Msg3. This allows terminal 200 to set a transmission power appropriate for the symbol type of Msg3. By transmitting Msg3 with appropriate transmission power, terminal 200 can reduce interference caused by Msg3 and improve the reception quality at base station 100.

[0158] [Control Method 6] In control method 6, if the symbol type of the initial transmission (initial transmission) of Msg3 and the retransmission (retransmission) of Msg3 are different, terminal 200 adjusts the transmission power of Msg3 by changing the interpretation of the TPC command. For example, if the symbol type of the initial transmission and the retransmission of Msg3 are different, terminal 200 may adjust the transmission power of the retransmission of Msg3 using a value obtained by reinterpreting the value of the TPC command.

[0159] When retransmitting Msg3, terminal 200 can adjust the transmit power using the TPC command included in the UL grant of PDCCH. Here, if the symbol type differs between the initial transmission and the retransmission of Msg3, the power used to adjust the transmit power may increase, similar to the case where the target symbol types of PRACH and Msg3 are different.

[0160] Therefore, in control method 6, when the symbol type of the initial Msg3 transmission and the Msg3 retransmission are different, the interpretation of the TPC command is changed to make it easier to adjust the power of Msg3.

[0161] Figure 11 shows an example where the symbol type differs between the initial transmission and retransmission of Msg3.

[0162] In Figure 11, terminal 200 transmits PRACH in slot #1, receives RAR in slot #5, and transmits Msg3 (initial transmission) using the SBFD symbol in slot #8. However, Msg3 is not properly received by base station 100, so base station 100 transmits PDCCH in slot #11, and the UL grant included in PDCCH instructs terminal 200 to retransmit Msg3. Terminal 200 retransmits Msg3 using the UL symbol in slot #14.

[0163] Here, in slot #8, the transmit power is adjusted by TPC commands included in the RAR UL grant (for example, in the range of -6 dB to 8 dB). On the other hand, in slot #11, the transmit power is adjusted by TPC commands included in the PDCCH UL grant (in the range of -1 dB to 3 dB cumulatively, and in the range of -4 dB to 4 dB absolutely). As mentioned above, in addition to the existing transmit power control, adjustment of the power difference depending on the symbol type is necessary, so the transmit power that can be adjusted by the TPC commands included in the existing PDCCH UL grant may not be sufficient.

[0164] As a method for changing the interpretation of a TPC command, for example, reinterpretation method 1 or reinterpretation method 2 of control method 5 may be applied. In this case, control method 5 changes the interpretation of the TPC command when the target symbol types of PRACH and Msg3 are different, whereas control method 6 may be applied when the symbol types of the initial transmission and retransmission of Msg3 are different. Furthermore, the target to which the TPC command reinterpretation method is applied may be, for example, the TPC command of PDCCH's UL grant, rather than the TPC command of RAR UL grant. For example, in reinterpretation method 1, when extending the number of bits of a TPC command, the number of bits may be extended for the 2-bit TPC command of PDCCH. For example, if it is extended by 1 bit to 3 bits, the TPC command table of RAR UL grant may be used.

[0165] Thus, according to control method 6, when the symbol type of the initial transmission and retransmission of Msg3 are different, terminal 200 can change the interpretation of the TPC command and adjust the transmission power of Msg3 to set a transmission power suitable for the symbol type of the retransmitted Msg3. By retransmitting Msg3 with appropriate transmission power, terminal 200 can reduce interference caused by Msg3 and improve the reception quality at base station 100.

[0166] Furthermore, control method 6 may be applied to the retransmission of other PUSCH messages different from Msg3, for example. For example, control method 6 may be applied when the symbol type differs between the initial PUSCH transmission and the PUSCH retransmission, which are scaled by the UL grant of the PDCCH. Terminal 200 can set a transmission power suitable for the symbol type of the retransmitted PUSCH by adjusting the transmission power of the PUSCH by changing the interpretation of the TPC command. By retransmitting the PUSCH with appropriate transmission power, terminal 200 can reduce interference caused by the PUSCH and improve the reception quality at base station 100.

[0167] The above describes an example of a transmission power control method.

[0168] As described above, in this embodiment, the terminal 200 sets the transmission power of Msg3 (or retransmission Msg3) based on the target symbol type of PRACH and Msg3 (or initial Msg3 and retransmission Msg3) transmitted in either SBFD symbols or non-SBFD symbols, and transmits Msg3 using the set transmission power. As a result, even if the target symbol types of PRACH (or initial Msg3) and Msg3 (retransmission Msg3) are different, the terminal 200 can apply a transmission power control parameter corresponding to the symbol type of Msg3 (retransmission Msg3), thereby reducing interference from Msg3 and improving the reception quality at the base station 100. Therefore, according to this embodiment, the transmission power of the uplink signal can be appropriately controlled.

[0169] (Other Embodiments) (1) It may be possible to set which of the above-described control methods 1 to 6 is to be applied. For example, the applied control method may be set by signaling of the upper layer, notified by the RAR UL grant field, or selected by the terminal 200. For example, it may be set by signaling of the upper layer whether to apply control method 1 or control method 2. By making multiple control methods configurable, the degree of freedom in controlling the transmission power of Msg3 is improved, and it becomes possible to set the Msg3 transmission power that is more suitable for the symbol type.

[0170] (2) In control methods 2 and 3, the power offset of the preamble target received power and the power offset of power ramping may be set individually. Alternatively, the power offset of the preamble target received power and the power offset of power ramping may be set as a single (common) power offset for adjusting the transmit power of Msg3.

[0171] The flexibility of Msg3 transmit power settings can be improved by individually setting the power offset. For example, the flexibility of Msg3 transmit power settings can be improved by applying separate power offset settings for the preamble target receive power and power ramping.

[0172] On the other hand, by setting a single power offset, signaling can be standardized, thereby reducing signaling overhead. Furthermore, implementation complexity can be reduced.

[0173] (3) In control methods 5 and 6, the terminal 200 may manage the cumulative values ​​of TPC commands separately for SBFD symbols and non-SBFD symbols. For example, the power value notified by the TPC command may be added to the cumulative value. In this case, the TPC command value may be added to different cumulative values ​​for SBFD symbols and non-SBFD symbols. By managing the cumulative value of TPC for each symbol type, it is possible to easily adjust the transmission power due to the difference in symbol types.

[0174] (4) Power offset based on the bandwidth of the PUSCH resource in the calculation of the Msg3 transmission power. Path loss compensation coefficient (α b,f,c (j)), and MCS offset (Δ TF,b,f,c (i)) Existing definitions or parameters may be applied. That is, definitions or parameters for SBFD do not need to be introduced for these parameters. Parameters that directly set the target received power of Msg3 (e.g., the upper layer parameter msg3-Alpha) may have definitions or parameters for SBFD symbols applied in addition to existing definitions or parameters. In this case, definitions or parameters that match the symbol type may be applied. That is, when transmitting Msg3 with a non-SBFD symbol, existing definitions or parameters may be used, and when transmitting Msg3 with an SBFD symbol, definitions or parameters for SBFD symbols may be applied.

[0175] (5) A setting (e.g., a restriction) may be introduced to make the symbol type or target symbol type of PRACH and Msg3 the same. If the symbol types of PRACH and Msg3 are the same, it is not necessary to adjust the transmission power due to the difference in symbol types between PRACH and Msg3 when transmitting Msg3, thus simplifying the power control of Msg3. In addition, the complexity of the implementation of terminal 200 can be reduced.

[0176] (6) A setting (e.g., a restriction) may be introduced to make the symbol type the same for the initial transmission of Msg3 and the retransmission of Msg3. If the symbol type is the same for the initial transmission of Msg3 and the retransmission of Msg3, it is not necessary to adjust the transmission power due to the difference in symbol type between the initial transmission and the retransmission of Msg3, thus simplifying the power control of Msg3. In addition, the complexity of the implementation of terminal 200 can be reduced.

[0177] This setting may also be applied to retransmissions of other PUSCH messages different from Msg3. For example, a setting (restriction) may be introduced that requires the symbol type to be the same for the initial PUSCH transmission and the PUSCH retransmission, which are scaled by the PDCCH's UL grant. If the symbol type is the same for the initial PUSCH transmission and the PUSCH retransmission, it is not necessary to adjust the transmission power due to the difference in symbol type between the initial PUSCH and the retransmission, thus simplifying the PUSCH power control. It also reduces the complexity of the implementation of terminal 200.

[0178] (7) The control method described above may be applied to a signal different from Msg3.

[0179] For example, the control method described above may be applied to UL transmissions between different TRPs (Transmission / Repetition Points). For example, the control method described above may be applied to transmit power control when performing a UL transmission to TRP#2 after a UL transmission to TRP#1. Each control method allows for setting a transmit power appropriate for the TRP.

[0180] Furthermore, the control methods described above may be applied, for example, to the transmission power control between NES (Network Energy Saving) cells and normal cells. For example, the control methods described above may be applied to the transmission power control when performing a UL transmission to an NES cell after a UL transmission to a normal cell. Each control method allows for setting a transmission power appropriate to the cell type.

[0181] (8) For slots containing SBFD symbols, set a separate maximum transmit power (P) for the SBFD symbols. CMAX ) may be applied.

[0182] The transmit power of Msg3 is limited by the maximum transmit power. In addition to the existing maximum transmit power, the transmit power of Msg3 may also be controlled by setting a maximum transmit power for SBFD symbols. For example, by setting a maximum transmit power lower than the existing maximum transmit power for SBFD symbols, the interference caused by Msg3 transmission can be reduced.

[0183] Here, for example, the maximum transmit power could be set (changed) on a symbol-by-symbol basis. In this method, for example, the maximum transmit power applied to a symbol could be changed on a symbol-by-symbol basis depending on whether it is an SBFD symbol or a non-SBFD symbol. This could increase the complexity of the implementation of terminal 200. Therefore, for example, the change in maximum transmit power could be done on a slot-by-slot basis instead of on a symbol-by-symbol basis. This can reduce the complexity of the implementation of terminal 200.

[0184] Furthermore, the maximum transmit power for SBFD symbols may be applied to slots that contain SBFD symbols. For example, a slot to which the existing maximum transmit power applies may contain non-SBFD symbols but not SBFD symbols.

[0185] Furthermore, if the positions of SBFD symbols and non-SBFD symbols are set quasi-statically, the terminal 200 can determine in advance which maximum transmit power should be applied to each slot, thereby further reducing the complexity of the terminal 200's implementation.

[0186] In this way, for slots containing SBFD symbols, a separate maximum transmit power (P) for SBFD symbols is provided. CMAX By applying this, the transmit power in the SBFD symbol can be limited with lower complexity at terminal 200.

[0187] (9) Existing maximum transmission power (P CMAX Apart from the above, a new parameter is the maximum transmit power (P) for Msg3 transmission in the SBFD symbol. MAX_SBFD_MSG3 (It may be stated as follows.)

[0188] In the transmission of Msg3 in the SBFD symbol, terminal 200 has a transmission power setting value of P MAX_SBFD_MSG3 After determining whether it exceeds the limit, you may then determine whether it exceeds the existing maximum transmission power.

[0189] Furthermore, a new parameter for maximum transmit power is the maximum transmit power (P) of UL transmission in SBFD symbols (e.g., UL transmission not limited to Msg3). MAX_SBFD (as stated) may be introduced. In UL transmission in SBFD symbols, terminal 200 is P MAX_SBFD After determining whether it exceeds the limit, you may then determine whether it exceeds the existing maximum transmission power.

[0190] In this way, by introducing a new parameter for maximum transmit power, it becomes possible to operate without affecting the existing determination of maximum transmit power, thereby reducing the complexity of implementing the terminal 200 when supporting SBFD operation.

[0191] Other embodiments have been described above.

[0192] In the above embodiment, the units of time-domain resources are not limited to symbols and slots, but may be other resources in the time domain, or other combinations of time-domain resources.

[0193] Furthermore, although the above embodiment describes the case in which SBFD is applied, any method in which the transmission direction (e.g., DL or UL) is set in multiple bands (e.g., subbands) obtained by dividing the frequency band is not limited to SBFD and any embodiment of this disclosure may be applied.

[0194] Furthermore, in the embodiments described above, values ​​such as the number of subbands, the number of DL subbands, the number of UL subbands, the number of slots, the number of symbols, the number of repetitions, and parameters related to transmit power control are examples only and are not limited. Also, the subband configuration used in the embodiments described above is an example only, and the number of subbands, the arrangement order of DL subbands and UL subbands are not limited thereto. Also, the slot configuration used in the embodiments described above is an example only, and the arrangement of SBFD slots and non-SBFD slots is not limited thereto.

[0195] (Supplement) Information indicating whether or not the terminal 200 supports the functions, operations, or processes described in the above-described embodiment may be transmitted (or notified) from the terminal 200 to the base station 100 as, for example, capability information or capability parameters of the terminal 200.

[0196] The capability information may include an information element (IE) that individually indicates whether the terminal 200 supports at least one of the functions, operations, or processes shown in the embodiments described above. Alternatively, the capability information may include an information element that indicates whether the terminal 200 supports any two or more combinations of the functions, operations, or processes shown in the embodiments described above.

[0197] The base station 100 may, for example, determine (or decide or assume) which functions, operations, or processes the source terminal 200 supports (or does not support) based on capability information received from the terminal 200. The base station 100 may perform operations, processes, or controls in accordance with the determination result based on the capability information. For example, the base station 100 may control the resource settings of the random access channel based on capability information received from the terminal 200.

[0198] Furthermore, the fact that the terminal 200 does not support some of the functions, operations, or processes shown in the embodiments described above may be interpreted as the terminal 200 having restrictions on such some functions, operations, or processes. For example, information or requests regarding such restrictions may be notified to the base station 100.

[0199] Information regarding the capabilities or limitations of terminal 200 may, for example, be defined in a standard, or it may be implicitly communicated to base station 100 in association with information known at base station 100 or information transmitted to base station 100.

[0200] (Control Signals) In this disclosure, the downlink control signals (or downlink control information) relating to one embodiment of this disclosure may be, for example, signals (or information) transmitted in a Physical Downlink Control Channel (PDCCH) at the physical layer, or signals (or information) transmitted in a Medium Access Control Control Element (MAC CE) or Radio Resource Control (RRC) at a higher layer. Furthermore, the signals (or information) are not limited to being notified by downlink control signals, but may be predetermined in a specification (or standard), or may be pre-configured in base stations and terminals.

[0201] In this disclosure, the uplink control signal (or uplink control information) related to one embodiment of this disclosure may be, for example, a signal (or information) transmitted in the physical layer PUCCH, or a signal (or information) transmitted in the upper layer MAC CE or RRC. Furthermore, the signal (or information) is not limited to being notified by the uplink control signal, but may be predetermined in the specification (or standard), or may be pre-configured in the base station and terminal. In addition, the uplink control signal may be replaced with, for example, uplink control information (UCI), 1st stage sidelink control information (SCI), or 2nd stage SCI.

[0202] (Base Station) In one embodiment of the present disclosure, the base station may be a Transmission Reception Point (TRP), cluster head, access point, Remote Radio Head (RRH), eNodeB (eNB), gNodeB (gNB), Base Station (BS), Base Transceiver Station (BTS), master unit, gateway, etc. Also, in side-link communication, the terminal may assume the role of a base station. Alternatively, instead of a base station, there may be a relay device that relays communication between the upper node and the terminal. There may also be a roadside unit.

[0203] (Uplink / Downlink / Sidelink) An embodiment of the present disclosure may be applied to, for example, an uplink, a downlink, or a sidelink. For example, an embodiment of the present disclosure may be applied to a Physical Uplink Shared Channel (PUSCH), Physical Uplink Control Channel (PUCCH), Physical Random Access Channel (PRACH) of an uplink, a Physical Downlink Shared Channel (PDSCH), PDCCH, Physical Broadcast Channel (PBCH) of a downlink, or a Physical Sidelink Shared Channel (PSSCH), Physical Sidelink Control Channel (PSCCH), Physical Sidelink Broadcast Channel (PSBCH) of a sidelink.

[0204] PDCCH, PDSCH, PUSCH, and PUCCH are examples of downlink control channels, downlink data channels, uplink data channels, and uplink control channels, respectively. PSCCH and PSSCH are examples of sidelink control channels and sidelink data channels. PBCH and PSBCH are examples of broadcast channels, and PRACH is an example of a random access channel.

[0205] (Data Channel / Control Channel) One embodiment of the present disclosure may be applied to either a data channel or a control channel, for example. For example, the channel in one embodiment of the present disclosure may be replaced with any of the data channels PDSCH, PUSCH, PSSCH, or the control channels PDCCH, PUCCH, PBCH, PSCCH, PSBCH.

[0206] (Reference Signal) In one embodiment of the present disclosure, the reference signal is, for example, a signal known to both the base station and the mobile station, and may be called a Reference Signal (RS) or pilot signal. The reference signal may be any of the following: Demodulation Reference Signal (DMRS), Channel State Information - Reference Signal (CSI-RS), Tracking Reference Signal (TRS), Phase Tracking Reference Signal (PTRS), Cell-specific Reference Signal (CRS), or Sounding Reference Signal (SRS).

[0207] (Time Interval) In one embodiment of the present disclosure, the unit of time resource is not limited to one or a combination of slots and symbols, but may be a time resource unit such as a frame, superframe, subframe, slot, time slot, subslot, minislot, or symbol, Orthogonal Frequency Division Multiplexing (OFDM) symbol, Single Carrier - Frequency Division Multiplexing Access (SC-FDMA) symbol, or any other time resource unit. Furthermore, the number of symbols contained in one slot is not limited to the number of symbols exemplified in the above embodiment, but may be any other number of symbols.

[0208] (Frequency Band) One embodiment of the present disclosure may be applied to either a licensed band or an unlicensed band.

[0209] (Communication) One embodiment of the present disclosure may be applied to communication between a base station and a terminal (Uu-link communication), communication between terminals (Sidelink communication), or Vehicle to Everything (V2X) communication. For example, the channel in one embodiment of the present disclosure may be replaced with any of PSCCH, PSSCH, Physical Sidelink Feedback Channel (PSFCH), PSBCH, PDCCH, PUCCH, PDSCH, PUSCH, or PBCH.

[0210] Furthermore, one embodiment of this disclosure may be applied to any of the following: a terrestrial network, a satellite, or a non-terrestrial network (NTN) using a high-altitude pseudo-satellite (HAPS). Also, one embodiment of this disclosure may be applied to terrestrial networks with large cell sizes, ultra-wideband transmission networks, and other networks where transmission delay is large relative to symbol length or slot length.

[0211] (SBFD) In ​​one embodiment of the present disclosure, the operation for uplink, downlink, and sidelink symbols may also be applied to symbols (e.g., SBFD symbols) on which SBFD (Subband non-overlapping full duplex, Subband full duplex) operation or control is performed. In an SBFD symbol, a frequency domain (or frequency resource, frequency band) is divided into multiple frequency domains (e.g., also called subbands, RB sets, subbands, or sub-BWPs (Bandwidth parts)). A terminal transmits and receives in different directions (e.g., downlink or uplink) on a subband basis. In an SBFD symbol, a terminal may transmit and receive in either the uplink or downlink direction only, and not in the other direction. On the other hand, a base station may be able to transmit and receive both uplink and downlink simultaneously. An SBFD symbol may have a smaller frequency domain available for downlink transmission compared to a symbol that transmits and receives only downlink. Similarly, an SBFD symbol may have a smaller frequency domain available for uplink transmission compared to a symbol that transmits and receives only uplink.

[0212] Furthermore, in the SBFD symbol, a terminal may transmit and receive both uplink and downlink simultaneously. In this case, the frequency domains in which the terminal transmits and the frequency domains in which it receives may not be adjacent, and a frequency gap (also called a frequency interval) may be maintained between them.

[0213] Furthermore, sidelink transmission and reception may be included as different transmission and reception directions for each subband unit, which is a divided region.

[0214] (XDD: cross division duplex) In one embodiment of the present disclosure, the operation for uplink, downlink, and sidelink symbols may be applied to symbols (e.g., full duplex symbols) on which full duplex operation or control is performed. In full duplex symbols, both the terminal and the base station can transmit and receive uplink and downlink simultaneously. In full duplex symbols, the terminal and base station may transmit and receive simultaneously in the available frequency domain (or frequency resource, frequency band), or they may transmit and receive simultaneously in some frequency domains (i.e., they may transmit or receive in other frequency domains). In this case, the frequency domain on which the base station or terminal transmits and the frequency domain on which it receives may not be adjacent, and a frequency gap (also called a frequency gap) may be maintained between them. Alternatively, for example, to reduce interference, either the terminal or the base station may transmit and receive simultaneously (i.e., the other may transmit or receive).

[0215] Furthermore, full duplex operation may be applied to operations where the terminal can simultaneously transmit and receive sidelinks. Also, full duplex operation may be applied to operations where the terminal can simultaneously transmit and receive sidelinks and uplinks or downlinks.

[0216] (Antenna Port) In one embodiment of the present disclosure, an antenna port refers to a logical antenna (antenna group) composed of one or more physical antennas. For example, an antenna port does not necessarily refer to a single physical antenna, but may refer to an array antenna composed of multiple antennas. For example, the number of physical antennas that make up an antenna port is not specified, and it may be defined as the smallest unit on which a terminal station can transmit a reference signal. An antenna port may also be defined as the smallest unit on which the weighting of a precoding vector is multiplied.

[0217] <5G NR System Architecture and Protocol Stack> The 5G NR system architecture, as a whole, assumes an NG-RAN (Next Generation - Radio Access Network) with gNBs. The gNBs provide the UE-side termination for the user plane (SDAP / PDCP / RLC / MAC / PHY) and control plane (RRC) protocols of NG radio access. The gNBs are connected to each other by Xn interfaces. Furthermore, the gNBs are connected to the NGC (Next Generation Core) by Next Generation (NG) interfaces, more specifically to the AMF (Access and Mobility Management Function) (e.g., a specific core entity performing the AMF) by NG-C interfaces, and to the UPF (User Plane Function) (e.g., a specific core entity performing the UPF) by NG-U interfaces. The NG-RAN architecture is shown in Figure 12 (see, for example, 3GPP TS 38.300 v15.6.0, section 4).

[0218] <RRC Connection Setup and Reconfiguration Procedure> This describes the communication between the UE, gNB, and AMF (5GC entity) when the UE transitions from RRC_IDLE to RRC_CONNECTED in the NAS section (see TS 38.300 v15.6.0).

[0219] RRC is a higher-layer signaling (protocol) used for configuring the UE and gNB. The AMF prepares the UE context data (which includes, for example, the PDU session context, security key, UE Radio Capability, 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 to the gNB with a SecurityModeComplete message. Subsequently, the gNB sends an RRCReconfiguration message to the UE, and upon receiving an RRCReconfigurationComplete from the UE, the gNB reconfigures itself to set up the Signaling Radio Bearer 2 (SRB2) and Data Radio Bearer (DRB). For signaling-only connections, the SRB2 and DRB are not set up, so the RRCReconfiguration step is omitted. Finally, the gNB notifies the AMF that the setup procedure is complete with an Initial Context Setup Response.

[0220] Accordingly, this disclosure provides a 5th Generation Core (5GC) entity (e.g., AMF, SMF, etc.) comprising a control circuit that establishes a Next Generation (NG) connection with gNodeB during operation, and a transmission unit that sends an initial context setup message to gNodeB via the NG connection during operation so that a signaling radio bearer between gNodeB and User Equipment (UE) is set up. Specifically, gNodeB transmits Radio Resource Control (RRC) signaling, including a Resource Allocation Setting Information Element (IE), to the UE via the signaling radio bearer. The UE then transmits on the uplink or receives on the downlink based on the resource allocation setting.

[0221] <QoS Control> The 5G QoS (Quality of Service) model is based on QoS flows and supports both QoS flows where a guaranteed flow bit rate is required (GBR: Guaranteed Bit Rate QoS flows) and QoS flows where a guaranteed flow bit rate is not required (non-GBR QoS flows). Therefore, at the NAS level, a QoS flow is the finest granularity of QoS within a PDU session. QoS flows are identified within a PDU session by a QoS Flow ID (QFI: QoS Flow ID) carried in the encapsulation header via the NG-U interface.

[0222] For each UE, the 5GC establishes one or more PDU sessions. For each UE, the NG-RAN establishes, for example, at least one Data Radio Bearers (DRB) in accordance with the PDU session. Additional DRBs for the QoS flow of that PDU session can be configured later (when this is done is up to the NG-RAN). The NG-RAN maps packets belonging to various PDU sessions to various DRBs. NAS-level packet filters in the UE and 5GC associate UL packets and DL packets with QoS flows, while AS-level mapping rules in the UE and NG-RAN associate UL QoS flows and DL QoS flows with DRBs.

[0223] (Open-RAN) The base station described in each embodiment (for example, a 5G NR base station called a gNB) may consist of three functional modules: a Centralized Unit (CU), a Distributed Unit (DU), and a Radio Unit (RU).

[0224] CU may be referred to as, for example, a central node, aggregation node, central station, aggregation station, or central unit. DU may be referred to as, for example, an O-DU (O-RAN Distributed Unit), a distributed node, a distributed station, or a distributed unit. RU may be referred to as, for example, an O-RU (O-RAN Radio Unit), a radio device, a radio node, a radio station, an antenna unit, or a radio unit.

[0225] The functional division configuration (or functional division point) between CU, DU, and RU has multiple division options defined. The term "functional division point" is sometimes referred to as "split," "option," or "split option."

[0226] Examples of "splitting options" include the following splitting options 1 to 8. The functions of the base station described in each embodiment may be split into CU, DU, and RU functions according to any of the following splitting options 1 to 8. For example, CU, DU, and RU may be functionally split individually, or functional split may occur only between CU and DU, or only between DU and RU. (1) Splitting option 1: Between RRC (radio resource control) and PDCP (2) Splitting option 2: Between PDCP and RLC (High-RLC) (3) Splitting option 3: Between High-RLC and Low-RLC (4) Splitting option 4: Between RLC (Low-RLC) and MAC (High-MAC) (5) Splitting option 5: Between High-MAC and Low-MAC (6) Splitting option 6: Between MAC (Low-MAC) and PHY (High-PHY) (7) Splitting option 7: Between High-PHY and Low-PHY (8) Splitting option 8: Between PHY (Low-PHY) and RF

[0227] The functional division point between the CU and O-DU may be Split Option 2. The section between the CU and O-DU is called the midhaul, and the F1 interface is defined by 3GPP. The section between the O-DU and O-RU is called the fronthaul, and its functional division point may be Split Option 7-2x, which has been adopted as the O-RAN fronthaul specification.

[0228] Figure 13 shows an example of splitting the base station functions of a gNB into CU, O-DU, and O-RU using Split Option 2 and Split Option 7-2x.

[0229] The CU may, for example, include RRC (radio resource control) functionality, SDAP (service data adaptation protocol) functionality, and PDCP (packet data convergence protocol) functionality.

[0230] The O-DU may include, for example, RLC (radio link control) functionality, MAC functionality, and high-level physical layer (HIGH-PHY) functionality. The HIGH-PHY functionality may also include encoding functionality, scrambling functionality, modulation functionality, layer mapping functionality, precoding functionality, and RE (resource element) mapping functionality for downlink (DL) transmission. The HIGH-PHY functionality may also include decoding functionality, descrambling functionality, demodulation functionality, layer demapping functionality, and RE (resource element) demapping functionality for uplink (UL) reception.

[0231] The O-RU may, for example, be equipped with a LOW-PHY function and an RF function. The LOW-PHY function may also be equipped with a beamforming function, an IFFT (Inverse Fast Fourier Transform) + CP (Cyclic Prefix) application function, and a D / A (Digital to Analog) conversion function for downlink transmission. The LOW-PHY function may also be equipped with an A / D (Analog to Digital) conversion function, a CP removal + FFT (Fast Fourier Transform) function, and a beamforming function for uplink reception.

[0232] If the O-DU does not have a precoding function, the O-RU may have a precoding function.

[0233] The O-RU may also be equipped with LBT (listen before talk) functionality. In Split Option 7-2x, eCPRI (Evolved Common Public Radio Interface) is specified as the communication method between the O-DU and O-RU. In Split Option 7-2x, eCPRI transmits and receives not only the sampling sequence of the in-phase (I) and quadrature (Q) components of the OFDM signal in the frequency domain, but also information used for beamforming in the antenna and time synchronization signals.

[0234] The information transmitted by the signals described in each embodiment (PDCCH, PUCCH, PDSCH, PUSCH, MAC CE, RRC, etc.) may be transmitted between the O-DU and O-RU via the eCPRI's User Plane (U-Plan) or Control Plane (C-Plane).

[0235] If the functions described in each embodiment are executed in the O-RU by functional partitioning, the O-DU may control the O-RU by transmitting information for controlling the functions via a control signal (e.g., eCPRI) between the O-DU and the O-RU.

[0236] If the functions described in each embodiment are executed in the O-DU by functional partitioning, the O-RU may receive the result of the execution of the function in the O-DU via a control signal (e.g., eCPRI) and control the O-RU based on the received result.

[0237] The CU, O-DU, and O-RU may be deployed in physically different devices connected by optical fibers or the like, or some or all of their functions may be deployed in the same physical device.

[0238] CU and O-DU may be logical entities implemented as software running on a server such as a cloud, as a virtualized RAN (virtual Radio Access Network: vRAN). Furthermore, some or all of the functions of CU and O-DU may be provided as a service of virtualized network functions (NFV).

[0239] The transceiver does not have to be a wireless transceiver; for example, it may be a network transceiver, an optical transceiver, etc. The wireless resources allocated by the O-DU may be resources for wireless communication between the O-RU and the UE.

[0240] This disclosure can be implemented using software, hardware, or software integrated with hardware.

[0241] Each functional block used in the description of the above embodiments may be implemented partially or entirely as an integrated circuit (LSI), and each process described in the above embodiments may be controlled partially or entirely by a single LSI or a combination of LSIs. An LSI may consist of individual chips, or it may consist of a single chip that includes some or all of the functional blocks. An LSI may have data inputs and outputs. Depending on the degree of integration, LSIs may also be referred to as ICs, system LSIs, super LSIs, or ultra LSIs.

[0242] The integrated circuit implementation method is not limited to LSIs; it may also be implemented using dedicated circuits, general-purpose processors, or dedicated processors. Furthermore, a Field Programmable Gate Array (FPGA) that can be programmed after LSI manufacturing, or a reconfigurable processor that allows for the reconfiguration of the connections and settings of circuit cells within the LSI, may also be used. This disclosure may be implemented as digital or analog processing.

[0243] Furthermore, if advancements in semiconductor technology or other derived technologies lead to the emergence of integrated circuit technologies that can replace LSIs, then naturally, it would be possible to use those technologies to integrate functional blocks. The application of biotechnology, for example, is a possibility.

[0244] This disclosure is applicable to all types of devices, systems, and equipment having communication capabilities (collectively referred to as communication equipment). Communication equipment may include a radio transceiver and a processing / control circuit. The radio transceiver may include a receiver and a transmitter, or both as functions. The radio transceiver (transmitter, receiver) may include an RF (Radio Frequency) module and one or more antennas. The RF module may include an amplifier, an RF modulator / demodulator, or similar. Non-exclusive examples of communication devices include telephones (mobile phones, smartphones, etc.), tablets, personal computers (PCs) (laptops, desktops, notebooks, etc.), cameras (digital still / video cameras, etc.), digital players (digital audio / video players, etc.), wearable devices (wearable cameras, smartwatches, tracking devices, etc.), game consoles, digital book readers, telehealth / telemedicine devices, vehicles or mobile transport with communication capabilities (cars, airplanes, ships, etc.), and combinations of the above-mentioned devices.

[0245] Communication devices are not limited to portable or movable devices, but also include all kinds of non-portable or fixed devices, devices, and systems, such as smart home devices (appliances, lighting fixtures, smart meters or measuring instruments, control panels, etc.), vending machines, and any other "things" that may exist on an IoT (Internet of Things) network.

[0246] Communication includes data communication via cellular systems, wireless LAN systems, and communication satellite systems, as well as data communication using combinations of these.

[0247] Furthermore, the communication device also includes devices such as controllers and sensors that are connected to or linked to a communication device that performs the communication functions described in this disclosure. For example, this includes controllers and sensors that generate control signals and data signals used by the communication device that performs the communication functions of the communication device.

[0248] Furthermore, communication equipment includes infrastructure facilities such as base stations, access points, and any other devices, devices, and systems that communicate with or control the aforementioned non-limited types of equipment.

[0249] A communication device according to one embodiment of the present disclosure comprises a control circuit that sets the transmission power of a second signal based on the type of time resource of a first type of time resource in which the frequency band is divided into a plurality of bands, and a second type of time resource different from the first type, and a transmission circuit that transmits the second signal using the transmission power.

[0250] In one embodiment of the present disclosure, the first signal is a signal of the random access channel of the random access procedure, and the second signal is a signal of message 3 of the random access procedure.

[0251] In one embodiment of the present disclosure, the control circuit sets the transmit power of the message 3 using the preamble target receive power associated with the type of the message 3.

[0252] In one embodiment of the present disclosure, if the random access channel and the message 3 are of different types, the control circuit sets the transmission power of the message 3 using the preamble target received power and power offset used for transmission of the random access channel.

[0253] In one embodiment of the present disclosure, the control circuit sets the transmit power of the message 3 using a power ramping power added to the transmit power of the message 3 and a power offset, when the random access channel and the message 3 are of different types.

[0254] In one embodiment of the present disclosure, the control circuit sets the power ramping power to be added to the transmission power of the message 3 based on a parameter associated with the type of the message 3, when the random access channel and the message 3 are of different types.

[0255] In one embodiment of the present disclosure, if the random access channel and the message 3 are of different types, the control circuit adjusts the transmit power of the message 3 using a value obtained by reinterpreting the value of the transmit power control command.

[0256] In one embodiment of the present disclosure, the first signal is a message 3 initially transmitted in a random access procedure, and the second signal is a message 3 retransmitted in a random access procedure. If the first signal and the second signal are of different types, the control circuit adjusts the transmit power of the second signal using a value obtained by reinterpreting the value of the transmit power control command.

[0257] A communication device according to one embodiment of the present disclosure is a communication device comprising one or more processors and one or more memories coupled to the one or more processors for storing instructions, wherein the instructions are executable by the one or more processors to cause the communication device to set the transmission power of a second signal based on the type of time resource of a first type of time resource in which the frequency band is divided into a plurality of bands, and a second type of time resource different from the first type, and to transmit the second signal using the transmission power.

[0258] In a communication method according to one embodiment of the present disclosure, the communication device sets the transmission power of the second signal based on the type of time resource of the first signal and the second signal transmitted after the first signal, which are transmitted in either a first type of time resource in which the frequency band is divided into a plurality of bands, or a second type of time resource different from the first type, and transmits the second signal using the transmission power.

[0259] In one embodiment of the present disclosure, the method is controlled by an integrated circuit.

[0260] In one embodiment of the present disclosure, a communication method controlled by an integrated circuit, wherein the communication device sets the transmission power of a second signal based on the type of time resource of a first type of time resource in which the frequency band is divided into a plurality of bands, and a second type of time resource different from the first type, and transmits the second signal using the transmission power.

[0261] In one embodiment of the present disclosure, an integrated circuit comprises a circuit which controls the setting of the transmission power of a second signal based on the type of time resource of a first type of time resource in which the frequency band is divided into a plurality of bands, and a second type of time resource different from the first type, and controls the transmission of the second signal using the transmission power.

[0262] In one embodiment of the present disclosure, the integrated circuit comprises at least one input coupled to the circuit for inputting data, and at least one output coupled to the circuit for outputting data.

[0263] In one embodiment of the present disclosure, the circuit comprises a control circuit that sets the transmission power of a second signal based on the type of time resource of a first type of time resource in which the frequency band is divided into a plurality of bands, and a second type of time resource different from the first type, and a transmission circuit that transmits the second signal using the transmission power.

[0264] In one embodiment of the present disclosure, a non-temporary computer-readable recording medium having content that causes a processing circuit to perform a method, wherein the method involves a communication device setting the transmission power of a second signal based on the type of time resource of a first type of time resource in which the frequency band is divided into a plurality of bands, and a second type of time resource different from the first type, and transmitting the second signal using the transmission power.

[0265] In the non-temporary computer-readable recording medium according to one embodiment of the present disclosure, the contents include configuration settings.

[0266] A communication device according to one embodiment of the present disclosure comprises a control circuit that sets the transmission power of a second signal based on the type of time resource of a first type of time resource in which the frequency band is divided into a plurality of bands, and a second type of time resource different from the first type, and a receiving circuit that receives the second signal transmitted based on the transmission power.

[0267] A communication device according to one embodiment of the present disclosure is a communication device comprising one or more processors and one or more memories coupled to the one or more processors for storing instructions, wherein the instructions are executable by the one or more processors to cause the communication device to set the transmission power of a second signal based on the type of time resource of a first type of time resource in which the frequency band is divided into a plurality of bands, and a second type of time resource different from the first type, and to receive the second signal transmitted based on the transmission power.

[0268] In a communication method according to one embodiment of the present disclosure, the communication device sets the transmission power of the second signal based on the type of time resource of the first signal and the second signal transmitted after the first signal, which are transmitted in either a first type of time resource in which the frequency band is divided into a plurality of bands, or a second type of time resource different from the first type, and receives the second signal transmitted based on the transmission power.

[0269] In one embodiment of the present disclosure, the method is controlled by an integrated circuit.

[0270] In one embodiment of the present disclosure, a communication method controlled by an integrated circuit, wherein the communication device sets the transmission power of a second signal based on the type of time resource of a first type of time resource in which the frequency band is divided into a plurality of bands, and a second type of time resource different from the first type, and receives the second signal transmitted based on the transmission power.

[0271] In one embodiment of the present disclosure, an integrated circuit comprises a circuit which controls the setting of the transmission power of a second signal based on the type of time resource of a first type of time resource in which the frequency band is divided into a plurality of bands, and a second type of time resource different from the first type, and controls the reception of the second signal transmitted based on the transmission power.

[0272] In one embodiment of the present disclosure, the integrated circuit comprises at least one input coupled to the circuit for inputting data, and at least one output coupled to the circuit for outputting data.

[0273] In one embodiment of the present disclosure, the circuit comprises a control circuit that sets the transmission power of a second signal based on the type of time resource of a first type of time resource in which the frequency band is divided into a plurality of bands, and a second type of time resource different from the first type, and a receiving circuit that receives the second signal transmitted based on the transmission power.

[0274] In one embodiment of the present disclosure, a non-temporary computer-readable recording medium having content that causes a processing circuit to perform a method, wherein the method involves a communication device setting the transmission power of a second signal based on the type of time resource of a first type of time resource in which the frequency band is divided into a plurality of bands, and a second type of time resource different from the first type, and receiving the second signal transmitted based on the transmission power.

[0275] In the non-temporary computer-readable recording medium according to one embodiment of the present disclosure, the contents include configuration settings.

[0276] All disclosures in the specification, drawings, and abstract contained in the Japanese application No. 2025-018390, filed on February 6, 2025, are incorporated herein by reference.

[0277] One embodiment of this disclosure is useful for wireless communication systems.

[0278] 100 Base station 101, 201 Receiving unit 102, 202 Demapping unit 103, 203 Demodulation / decoding unit 104 Scheduling unit 105 UL transmission power control unit 106, 205 Control information holding unit 107, 207 Data / control information generation unit 108, 208 Encoding / modulation unit 109, 209 Mapping unit 110, 210 Transmission unit 200 Terminal 204 Control unit 206 Transmission power control unit

Claims

1. A communication device comprising: a control circuit that sets the transmission power of a second signal based on the type of time resource of a first type of time resource in which the frequency band is divided into multiple bands, and a second type of time resource different from the first type, which is transmitted in either a first type of time resource or a second type of time resource different from the first type; and a transmission circuit that transmits the second signal using the transmission power.

2. The communication device according to claim 1, wherein the first signal is a signal of a random access channel of a random access procedure, and the second signal is a signal of message 3 of a random access procedure.

3. The communication device according to claim 2, wherein the control circuit sets the transmission power of the message 3 using the preamble target received power associated with the type of the message 3.

4. The communication device according to claim 2, wherein the control circuit sets the transmission power of the message 3 using the preamble target received power and power offset used for transmission of the random access channel when the types of the random access channel and the message 3 are different.

5. The communication device according to claim 2, wherein the control circuit sets the transmission power of the message 3 using power ramping power added to the transmission power of the message 3 and a power offset when the random access channel and the message 3 are of different types.

6. The communication device according to claim 2, wherein the control circuit sets the power ramping power to be added to the transmission power of the message 3 based on a parameter associated with the type of the message 3 when the type of the random access channel and the message 3 are different.

7. The communication device according to claim 2, wherein the control circuit adjusts the transmission power of the message 3 using a value obtained by reinterpreting the value of the transmission power control command when the type of the random access channel and the message 3 are different.

8. The communication device according to claim 1, wherein the first signal is message 3 transmitted for the first time in a random access procedure, the second signal is message 3 retransmitted in a random access procedure, and the control circuit adjusts the transmission power of the second signal using a value obtained by reinterpreting the value of the transmission power control command when the first signal and the second signal are of different types.

9. A communication device comprising one or more processors, and one or more memories coupled to the one or more processors for storing instructions, wherein the instructions are executable by the one or more processors to cause the communication device to set the transmission power of a second signal based on the type of time resource of a first type of time resource in which the frequency band is divided into a plurality of bands, and a second type of time resource different from the first type, and to cause the communication device to transmit the second signal using the transmission power.

10. A communication device sets the transmission power of a second signal based on the type of time resource of a first type of time resource in which the frequency band is divided into multiple bands, and a second type of time resource different from the first type, and transmits the second signal using the transmission power.

11. A communication device comprising: a control circuit that sets the transmission power of a second signal based on the type of time resource of a first type of time resource in which the frequency band is divided into multiple bands, and a second type of time resource different from the first type, which is transmitted in either a first type of time resource or a second type of time resource; and a receiving circuit that receives the second signal transmitted based on the transmission power.

12. A communication device comprising one or more processors, and one or more memories coupled to the one or more processors for storing instructions, wherein the instructions are executable by the one or more processors to cause the communication device to set the transmission power of a second signal based on the type of time resource of a first type of time resource in which the frequency band is divided into a plurality of bands, and a second type of time resource different from the first type, and to receive the second signal transmitted based on the transmission power.

13. A communication device sets the transmission power of a second signal based on the type of time resource of a first type of time resource in which the frequency band is divided into multiple bands, and a second type of time resource different from the first type, and receives the second signal transmitted based on the transmission power.

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