Base station and communication method

Abstract

A base station having a distributed unit and a wireless unit, wherein the wireless unit has: a control unit that generates a first message including channel information and a measurement value in a radio resource management (RRM) measurement report required in beamforming based on a sounding reference signal (SRS), the channel information and the measurement value being associated with the same terminal identifier; and a transmission unit that transmits the first message to the distributed unit.

Description

Base Station and Communication Method

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[0006] , ,

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

[0002] In NR (New Radio) (also referred to as "5G") and a successor system of NR (for example, "6G"), which are wireless communication systems based on the 3GPP (registered trademark) standard, technologies that satisfy requirements such as a large-capacity system, high data transmission speed, low latency, simultaneous connection of a large number of terminals, low cost, power saving, etc. are being studied (for example, Non-Patent Document 1).

[0003] In addition, in O-RAN (Open-Radio Access Network), improving the bandwidth requirements in the front haul (Open Fronthaul) interface between the distributed unit (O-DU (Distributed Unit)) and the radio unit (O-RU (Radio Unit)) in the base station is being studied (for example, Non-Patent Document 2).

[0004] In the fronthaul splitting option in the prior art, the SRS (Sounding Reference Signal) channel estimation and SRS processing functions are arranged in the distributed unit (O-DU). Here, in O-RAN, arranging the SRS channel estimation and SRS processing functions in the radio unit (O-RU) and performing beam forming (BF) based on SRS in the radio unit are being studied to improve the bandwidth of the fronthaul interface.

[0005] 3GPP TS 38.300 V18.3.0 (2024-09) O-RAN.WG4.TS.CUS.0-R004-v16.01 (October 2024)

[0006] Regarding improving the bandwidth of the fronthaul interface between O-DU and O-RU when operating SRS-BF, efficiently transmitting the RRM (Radio Resource Management) measurement values and channel information obtained on the O-RU side to O-DU has become an issue.

[0007] While it is possible to transmit channel information and RRM measurement reports using the existing message formats Section Type 6 (ST6) and Section Type 10 (ST10), respectively, it is not possible to transmit channel information and RRM measurement reports while considering SRS-BF.

[0008] This invention has been made in view of the above points, and aims to realize efficient transmission of channel information and RRM measurement reports in the fronthaul interface of a base station, taking into account beamforming based on SRS (Sounding Reference Signal).

[0009] According to the disclosed technology, a base station is provided having a distributed unit and a radio unit, wherein the radio unit includes a control unit that generates a first message including channel information and measured values ​​in an RRM (Radio Resource Management) measurement report required for beamforming based on an SRS (Sounding Reference Signal), associated with the same terminal identifier, and a transmission unit that transmits the first message to the distributed unit.

[0010] According to the disclosed technology, efficient transmission of channel information and RRM measurement reports can be achieved at the base station's fronthaul interface, taking into account beamforming based on SRS (Sounding Reference Signal).

[0011] This is a diagram showing an example configuration (1) of a wireless communication system in an embodiment of the present invention. This is a diagram showing an example configuration (2) of a wireless communication system in an embodiment of the present invention. This is a diagram showing an example configuration (3) of a wireless communication system in an embodiment of the present invention. This is a diagram illustrating beamforming based on SRS in an embodiment of the present invention. This is a diagram (1) illustrating the message format (ST6) in an existing specification. This is a diagram (2) illustrating the message format (ST6) in an existing specification. This is a diagram (1) illustrating the message format (ST10) in an existing specification. This is a diagram (2) illustrating the message format (ST10) in an existing specification. This is a diagram (3) illustrating the message format (ST10) in an existing specification. This is a diagram (4) illustrating the message format (ST10) in an existing specification. This is a diagram showing an example of a first sequence diagram in an embodiment of the present invention. This is a diagram showing an example of a second sequence diagram in an embodiment of the present invention. This is a diagram showing an example of the functional configuration of a base station 10 in an embodiment of the present invention. This is a diagram showing an example of the functional configuration of a terminal 20 in an embodiment of the present invention. This is a diagram showing an example of the hardware configuration of a base station 10 or terminal 20 in an embodiment of the present invention. This is a diagram showing an example of the configuration of a vehicle 2001 in an embodiment of the present invention.

[0012] Embodiments of the present invention will be described below with reference to the drawings. Note that the embodiments described below are examples, and the embodiments to which the present invention is applied are not limited to those described below.

[0013] Existing technologies may be used as appropriate in the operation of the wireless communication system according to the embodiment of the present invention.

[0014] In the operation of the wireless communication system according to the embodiment of the present invention, existing technologies may be used as appropriate. However, such existing technologies may be, for example, existing LTE or existing NR, but are not limited to existing LTE or NR.

[0015] In the operation of the wireless communication system according to the embodiment of the present invention, existing technologies may be used as appropriate. However, such existing technologies may be, for example, existing LTE or existing NR, but are not limited to existing LTE or NR.

[0016] Furthermore, in the embodiments of the present invention described below, terms such as SS (Synchronization signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical broadcast channel), PRACH (Physical random access channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUCCH (Physical Uplink Control Channel), and PUSCH (Physical Uplink Shared Channel), which are used in existing LTE systems, will be used. This is for convenience of description, and similar signals, functions, etc., may be called by other names. Also, the above terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc. However, even if a signal is used in NR, it is not necessarily explicitly stated as "NR-".

[0017] Furthermore, in the embodiments of the present invention, the duplex system may be a TDD (Time Division Duplex) system, an FDD (Frequency Division Duplex) system, or any other system (for example, a Flexible Duplex).

[0018] Furthermore, in embodiments of the present invention, "configuring" wireless parameters means that predetermined values ​​are pre-configured, or that wireless parameters notified from the base station 10 or terminal 20 are configured. Also, in the following description, " / " means "and / or" unless otherwise specified, or unless it is clear from the context that it has a different meaning.

[0019] Figure 1 shows an example configuration (1) of a wireless communication system according to an embodiment of the present invention. The wireless communication system according to an embodiment of the present invention includes a base station 10 and a terminal 20, as shown in Figure 1. Figure 1 shows one base station 10 and one terminal 20, but this is an example, and there may be multiple base stations 10 and terminals 20.

[0020] Base station 10 is a communication device that provides one or more cells and communicates wirelessly with terminal 20. The physical resources of the wireless signal are defined in the time domain and the frequency domain. The time domain may be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain may be defined by the number of subcarriers or resource blocks. Base station 10 transmits synchronization signals and system information to terminal 20. Synchronization signals are, for example, NR-PSS and NR-SSS. System information is transmitted, for example, in NR-PBCH and is also called broadcast information. Synchronization signals and system information may also be called SSB (SS / PBCH block). As shown in Figure 1, base station 10 transmits control signals or data to terminal 20 via DL (Downlink) and receives control signals or data from terminal 20 via UL (Uplink). Both base station 10 and terminal 20 are capable of transmitting and receiving signals using beamforming. Furthermore, both the base station 10 and the terminal 20 can apply MIMO (Multiple Input Multiple Output) communication to DL or UL. Also, both the base station 10 and the terminal 20 may communicate via Carrier Aggregation (CA) through secondary cells (SCell) and primary cells (PCell). Additionally, the terminal 20 may communicate via Dual Connectivity (DC) through the primary cell of base station 10 and the primary secondary cell group cell (PSCell) of another base station 10.

[0021] Terminal 20 is a communication device equipped with wireless communication capabilities, such as a smartphone, mobile phone, tablet, wearable device, or M2M (Machine-to-Machine) communication module. As shown in Figure 1, Terminal 20 receives control signals or data from the base station 10 via DL and transmits control signals or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. Terminal 20 also receives various reference signals transmitted from the base station 10 and performs propagation path quality measurement based on the reception results of said reference signals.

[0022] Furthermore, various requirements are being considered for the next generation of 6G. For example, these requirements may include ultra-broadband communication, mission-critical communication, ultra-massive connection, universal coverage, intelligent connection, and ubiquitous sensing.

[0023] Furthermore, these requirements may include ultra-high-speed communication, large-capacity communication, ultra-wide coverage, ultra-low power consumption, cost reduction, ultra-low latency, ultra-high reliability communication, ultra-high connectivity, and sensing.

[0024] To meet these requirements, the new concept aims for extensibility (e.g., making it more effective for future use), ease of operation, customizability (e.g., making it easier to operate), and sustainability (e.g., cost reduction, a more robust configuration, and resilience). Furthermore, guaranteed communication, ensuring a minimum level of performance at all times, is being considered.

[0025] Figure 2 shows an example configuration (2) of a wireless communication system according to an embodiment of the present invention. Figure 2 shows an example configuration of a wireless communication system when DC (Dual connectivity) is performed. As shown in Figure 2, a base station 10A that will be an MN (Master Node) and a base station 10B that will be an SN (Secondary Node) are provided. Base stations 10A and 10B are each connected to the core network. Terminal 20 can communicate with both base station 10A and base station 10B.

[0026] A cell group provided by base station 10A, which is an MN (Mobile Network), is called an MCG (Master Cell Group), and a cell group provided by base station 10B, which is an SN (Mobile Network), is called an SCG (Secondary Cell Group). In a data center, an MCG consists of one PCell and one or more SCells, and an SCG consists of one PSCell (Primary SCG Cell) and one or more SCells.

[0027] Figure 3 shows an example configuration (3) of a wireless communication system according to an embodiment of the present invention. As shown in Figure 3, the radio unit O-RU10A communicates with the distributed unit O-DU10B and the SMO (Service Management and Operation) 30A via an Open Fronthaul (or simply a fronthaul). The SMO 30A communicates with the central control unit O-CU10C via the O1 interface and with the virtualization environment O-Cloud 30B, which provides RAN functions, etc., via the O2 interface. The O-DU10B and O-CU10C communicate via the F1 interface. In the following description, O-DU10B and O-RU10A may be simply referred to as O-DU and O-RU.

[0028] In O-RAN (Open-Radio Access Network), improvements are being considered to improve the bandwidth requirements in the open fronthaul between distributed units (O-DUs) and radio units (O-RUs) at base stations.

[0029] In conventional front hole splitting options, the SRS (Sounding Reference Signal) channel estimation and SRS processing functions are located in the distributed unit (O-DU). For example, in conventional technology, based on scheduling messages from the O-DU, an SRS IQ stream is sent from the O-RU to the O-DU, and SRS channel estimation and SRS processing are performed on the O-DU side. Furthermore, when using CIBF (Channel Information-Based Beamforming) in a Category B O-RU, estimated channel information is sent from the O-DU to the O-RU. Also, when using WDBF (Weight-Based Beamforming), the O-DU calculates beamforming weights using the estimated channels and sends them to the O-RU.

[0030] Figure 4 is a diagram illustrating beamforming based on SRS in an embodiment of the present invention. As shown in Figure 4, in O-RAN, it is being considered to place the SRS channel estimation and SRS processing functions in the radio unit (O-RU) and perform SRS-based beamforming in the radio unit. This makes it possible to significantly reduce the front hole bandwidth, as it is possible to omit the transmission of beamforming weights from the O-DU to the O-RU in the case of WDBF, and to omit the transmission of channel information from the O-DU to the O-RU in the case of CIBF.

[0031] Figure 5 is a diagram (1) illustrating the message format (ST6) in the existing specifications. In O-RAN, ST6 (Section Type 6) is used as the message format for transmitting channel information between O-RU and O-DU (fronthaul). Figure 5 defines the information contained in the Common Header Fields and Section Fields in the ST6 format.

[0032] Figure 6 is a diagram (2) illustrating the message format (ST6) in the existing specification. Figure 6 defines the bit arrangement for the information contained in the Common Header Fields and the Section Fields in the ST6 format.

[0033] Figure 7 is a diagram (1) illustrating the message format (ST10) in the existing specifications. In O-RAN, ST10 (Section Type 10) is used as the message format for transmitting RRM (Radio Resource Measurement) measurement reports between O-RU and O-DU (fronthaul). Figure 7 defines the information contained in the Common Header Fields and Section Fields in the ST10 format.

[0034] Figure 8 is a diagram (2) illustrating the message format (ST10) in the existing specification. Figure 8 defines the bit arrangement for the information contained in the Common Header Fields and the Section Fields in the ST10 format.

[0035] Figure 9 is a diagram (3) illustrating the message format (ST10) in the existing specifications. Figure 9 defines the bit arrangement for the information included in the Timing Advance Error measurement report in the ST10 format.

[0036] Figure 10 is a diagram (4) illustrating the message format (ST10) in the existing specifications. Figure 10 defines the bit arrangement for the information included in the UE layer signal power measurement report in the ST10 format.

[0037] The following describes a method for efficiently transmitting channel information and RRM measurement reports in the base station's fronthaul interface, taking into account beamforming based on SRS (Sounding Reference Signal).

[0038] (Example 1) Extension of ST6 Messages In this example, ST6 (Section Type 6), a message format for transmitting channel information according to existing specifications, is extended.

[0039] (Supports transmission from O-RU to O-DU) Existing ST6 messages are defined as messages transmitted from O-DU to O-RU, but when performing beamforming based on SRS, it is necessary to transmit channel information from O-RU to O-DU.

[0040] Therefore, O-DU and O-RU assume that messages in the existing ST6 specification or the extended ST6 (extended version) will be sent from O-RU to O-DU in order to transmit the channel information necessary for performing beamforming based on SRS.

[0041] (Integration of channel information and RRM measurement report into the same message) (Pattern 1-1) The O-DU and O-RU may be in the ST6 (extended version) format, which is an extension of the existing ST6 specification, and may include, if necessary, at least one measurement value in the RRM measurement report relating to items necessary and specific to SRS-BF. Such measurement values ​​may be, for example, the signal-to-noise ratio for the demodulation reference signal (DMRS-SNR), interference plus noise for the sounding reference signal (IpN for SRS), and the signal-to-interference plus noise ratio corresponding to the beam index (BeamIndex-Signal to Interference plus Noise Ratio (SINR)).

[0042] O-RU may send O-DU a message containing channel information and RRM measurement reports for items required and specific to SRS-BF, using the ST6 (extended) format.

[0043] (Pattern 1-2) O-DU and O-RU may, if necessary, include Section Extension A, a newly defined Section Extension (SE) in the ST6 of the existing specification, which includes at least one measurement value in the RRM measurement report for items required and specific to SRS-BF (such as DMRS-SNR, IpN for SNR, and BeamIndex-SINR). Here, in ST6, an extension flag may be set to indicate that Section Extension A is included, similar to the existing specification.

[0044] O-RU may send a message to O-DU using the ST6 format of the existing specification, including a newly defined section extension A, containing channel information and an RRM measurement report for items required and specific to SRS-BF.

[0045] (Message Transmission and Reception) The processing related to message transmission and reception will be described using a sequence diagram. FIG. 11 is a diagram showing an example of a first sequence diagram in the embodiment of the present invention. Hereinafter, the processing of each step will be described.

[0046] S101: O-RU10A generates a message including channel information estimated based on the SRS received from the terminal based on the aforementioned Pattern 1-1 or Pattern 1-2, and an RRM measurement report regarding items necessary for SRS-BF and specific to the terminal. The message may include channel information and an RRM measurement report for a plurality of terminals. Also, for example, using the terminal identifier (ueId) included in the section field of ST6, the channel information and the RRM measurement report corresponding to the same terminal may be associated.

[0047] S102: O-RU10A transmits the message generated in S101 to O-DU10B. Here, O-RU10A includes the frame identifier (frameId) and the slot identifier (slotId) corresponding to the frame and the slot at the time of transmission in the common header field of ST6.

[0048] S103: O-DU10B associates and stores the channel information, the RRM measurement report, and the terminal identifier (ueId) / frame identifier (frameId) / slot identifier (slotId) included in the message received in S102. In this way, by associating and storing the frame identifier (frameId) / slot identifier (slotId) and performing unified management, it becomes possible to easily execute real-time control of beamforming based on SRS.

[0049] (Example 2) Extension of ST10 Message In this example, the ST10 (Section Type 10) message format, which is used to send RRM measurement reports according to the existing specifications, is extended. The existing ST10 message is defined as a message that reports multiple measurement values ​​in an RRM measurement report specified by measTypeId (e.g., 1=TAE (Timing Advancing Error), 2=UE Layer Power, etc.) from O-RU to O-DU.

[0050] (Addition of RRM measurement ID for SRS-BF) (Pattern 2-1) O-DU and O-RU may be assumed to include, as necessary, at least one measurement value (DMRS-SNR, IpN for SNR, and BeamIndex-SINR, etc.) in the RRM measurement report for items required and specific to SRS-BF, in the ST10 (extended version) format, which extends the existing ST10 specification. Here, a new measTypeId may be defined to specify the measurement value in the RRM measurement report for items required and specific to SRS-BF.

[0051] O-RU may send O-DU a message containing RRM measurement reports for items required and specific to SRS-BF, using the ST10 (extended) format.

[0052] (Pattern 2-2) O-DU and O-RU may, if necessary, include Section Extension B, a newly defined Section Extension (SE) in the ST10 of the existing specification, which includes at least one measurement value in the RRM measurement report for items required and specific to SRS-BF (such as DMRS-SNR, IpN for SNR, and BeamIndex-SINR). Here, in ST10, an extension flag may be set to indicate that Section Extension B is included, similar to the existing specification.

[0053] (Field Optimization) In Pattern 2-1 / Pattern 2-2, O-DU and O-RU may be configured to store the SINR / RSSI required for SRS-BF in a message for each terminal layer (UE-layer) or each beam, using the existing ST10 specification's additional measurement flag (mf (measurement flag)), identifier indicating the type of measurement (measTypeId), measurement data size (measDataSize), etc.

[0054] Furthermore, O-DU and O-RU may, if necessary, utilize additionally defined section extensions to store additional information (e.g., a symbolMask specifying a symbol related to the SRS-BF, an IpN per PRB, etc.).

[0055] O-RU may send O-DU a message containing an RRM measurement report for items required and specific to SRS-BF, using the ST10 format of the existing specification, including a newly defined section extension B.

[0056] (Message Sending and Receiving) The process related to sending and receiving messages will be explained using a sequence diagram. Figure 12 is a diagram showing an example of a second sequence diagram in an embodiment of the present invention. The process of each step will be explained below.

[0057] S201:O-RU10A generates a message containing channel information estimated based on the SRS received from the terminal. This message may be, for example, a message based on the existing ST6 specification and may include terminal identifiers (ueId) and channel information for multiple terminals.

[0058] S202: O-RU10A sends the message generated in S201 to O-DU10B. Here, O-RU10A includes the frame identifier (frameId) and slot identifier (slotId) corresponding to the frame and slot at the time of transmission in the common header field of ST6.

[0059] S203:O-RU10A generates a message containing an RRM measurement report for items necessary and specific to SRS-BF, based on the aforementioned pattern 2-1 or pattern 2-2. The message may also include terminal identifiers (ueId) and RRM measurement reports for multiple terminals.

[0060] S204: O-RU10A sends the message generated in S203 to O-DU10B. Here, O-RU10A includes the frame identifier (frameId) and slot identifier (slotId) corresponding to the frame and slot at the time of transmission in the common header field of ST6.

[0061] S205: The O-DU10B stores channel information contained in the message received in S202 and the RRM measurement report contained in the message received in S204, associating them with the same terminal identifier (ueId), frame identifier (frameId), and slot identifier (slotId). By associating and storing the same frame identifier (frameId) and slot identifier (slotId) in this way, it is possible to store channel information and RRM measurement reports received in different messages as associations, making it easy to perform real-time control of beamforming based on SRS.

[0062] (Modification 1) In the above-described Embodiment 1 / Embodiment, it is possible to assume that O-DU and O-RU are given priority for messages containing channel information / RRM measurement reports that take into account beamforming based on SRS. For example, O-RU may add a delay control flag (delayControl) to the message and use this flag to send it with lower latency and priority over other messages.

[0063] (Modification 2) In the above-described embodiment 1 / embodiment, the O-DU and O-RU may be configured to transmit channel information / RRM measurement reports from multiple slots aggregated into a single message. This will result in transmission delay, but the message overhead will be reduced, allowing for operational options that can be selected according to the system's bandwidth capacity and scheduling policy.

[0064] (Effects) The above-described embodiments and modifications make it possible to efficiently transmit RRM measurement reports related to SRS-BF based on the existing specifications of the O-RAN architecture. Furthermore, compatibility with existing specifications can be maintained by extending the messages (ST6 / ST10) of the existing specifications and introducing new SEs.

[0065] Regarding the optimization of fronthaul bandwidth, by extending existing specifications (ST6 / ST10), introducing new SEs, and adding a new identifier (measTypeId) indicating the type of measurement, it is possible to consolidate information related to channel information estimation and RRM measurement, thereby reducing the number of messages sent and received and suppressing bandwidth consumption.

[0066] Furthermore, by adding or modifying items in the RRM measurement report (such as SINR, DMRS-SNR, Frequency Offset, and IpN) as needed, it is possible to optimize SRS-BF operation while maintaining compatibility with existing O-RAN specifications.

[0067] Furthermore, by utilizing delay management flags and slot synchronization, the O-DU can instantly receive the latest measurements required for the SRS-BF and perform highly accurate beam calculations, thereby improving real-time performance and beamforming accuracy.

[0068] In other words, the above-described method and embodiment makes it possible to efficiently transmit channel information and RRM measurement reports at the base station's fronthaul interface, taking into account beamforming based on SRS (Sounding Reference Signal).

[0069] (Device Configuration) Next, an example of the functional configuration of the base station 10 and terminal 20 that perform the processes and operations described above will be explained. The base station 10 and terminal 20 include the functions to carry out the above-described embodiment. However, the base station 10 and terminal 20 may each be equipped with only some of the functions in the embodiment.

[0070] <Base Station 10> Figure 13 is a diagram showing an example of the functional configuration of a base station 10 in an embodiment of the present invention. As shown in Figure 13, the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in Figure 13 is merely an example. Any functional classification and functional unit names are acceptable as long as they can perform the operations according to the embodiment of the present invention.

[0071] The transmitting unit 110 includes the function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly. The transmitting unit 110 also transmits inter-network node messages to other network nodes. The receiving unit 120 includes the function of receiving various signals transmitted from the terminal 20 and obtaining information from the received signals, for example, higher layer information. The transmitting unit 110 also has the function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, etc. to the terminal 20. The receiving unit 120 also receives inter-network node messages from other network nodes.

[0072] The setting unit 130 stores pre-configured setting information and various setting information to be transmitted to the terminal 20.

[0073] The control unit 140 performs control related to the processing described in the embodiment. The control unit 140 also performs scheduling. The signal transmission function unit of the control unit 140 may be included in the transmission unit 110, and the signal reception function unit of the control unit 140 may be included in the reception unit 120.

[0074] Furthermore, the base station 10 may include a distributed unit (O-DU) and a wireless unit (O-RU), and the distributed unit (O-DU) and the wireless unit (O-RU) may each have a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. Also, the distributed unit (O-DU) and the wireless unit (O-RU) may communicate with each other using the transmitting unit 110 and the receiving unit 120.

[0075] <Terminal 20> Figure 14 is a diagram showing an example of the functional configuration of terminal 20 in an embodiment of the present invention. As shown in Figure 14, terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in Figure 14 is merely an example. Any functional classification and functional unit names are acceptable as long as they can perform the operations according to the embodiment of the present invention.

[0076] The transmitting unit 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly. The receiving unit 220 wirelessly receives various signals and acquires signals from higher layers from the received physical layer signals. The receiving unit 220 also has the function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signals, etc. transmitted from the base station 10. For example, the transmitting unit 210 transmits PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel), etc. to other terminals 20 as D2D communication, and the receiving unit 220 receives PSCCH, PSSCH, PSDCH or PSBCH, etc. from other terminals 20.

[0077] The setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220. The setting unit 230 also stores pre-configured setting information.

[0078] The control unit 240 performs control related to the processing described in the embodiment. The signal transmission function in the control unit 240 may be included in the transmission unit 210, and the signal reception function in the control unit 240 may be included in the reception unit 220.

[0079] (Hardware Configuration) The block diagrams (Figures 13 and 14) used in the description of the above embodiments show functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one device that is physically or logically coupled, or it may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wired or wireless connections). A functional block may be realized by combining the one device or the multiple devices with software.

[0080] Functions include, but are not limited to, judgment, decision, determination, calculation, calculation, processing, derivation, investigation, exploration, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, assumption, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating (mapping), and assigning. For example, a functional block (configuration part) that enables transmission is called a transmitting unit or transmitter. In all cases, as mentioned above, the method of implementation is not particularly limited.

[0081] For example, the base station 10, terminal 20, etc. in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure. Figure 15 is a diagram showing an example of the hardware configuration of the base station 10 and terminal 20 according to one embodiment of the present disclosure. The above-mentioned base station 10 and terminal 20 may be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0082] In the following explanation, the term "device" can be read as "circuit," "device," "unit," etc. The hardware configuration of the base station 10 and terminal 20 may include one or more of the devices shown in the figure, or it may be configured without some of the devices.

[0083] Each function in the base station 10 and terminal 20 is realized by loading predetermined software (programs) onto hardware such as the processor 1001 and storage device 1002, which allows the processor 1001 to perform calculations, control communication by the communication device 1004, and control at least one of data reading and writing in the storage device 1002 and auxiliary storage device 1003.

[0084] The processor 1001 controls the entire computer, for example, by running an operating system. The processor 1001 may consist of a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic units, registers, etc. For example, the control unit 140, control unit 240, etc., described above may be implemented by the processor 1001.

[0085] Furthermore, the processor 1001 reads programs (program code), software modules, or data from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes accordingly. The program used is one that causes the computer to execute at least a part of the operations described in the above embodiment. For example, the control unit 140 of the base station 10 shown in Figure 13 may be implemented by a control program stored in the storage device 1002 and operated by the processor 1001. Also, for example, the control unit 240 of the terminal 20 shown in Figure 14 may be implemented by a control program stored in the storage device 1002 and operated by the processor 1001. Although the above-described processes have been explained as being executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The program may also be transmitted from the network via a telecommunications line.

[0086] The storage device 1002 is a computer-readable recording medium and may consist of at least one of the following: ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. The storage device 1002 may also be called a register, cache, main memory, etc. The storage device 1002 can store executable programs (program code), software modules, etc., for implementing a communication method according to one embodiment of the present disclosure.

[0087] The auxiliary storage device 1003 is a computer-readable recording medium and may consist of at least one of the following: an optical disc such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital multipurpose disk, a Blu-ray® disk), a smart card, flash memory (e.g., a card, a stick, a key drive), a floppy® disk, a magnetic strip, etc. The above-mentioned storage medium may also be a database, server, or other suitable medium that includes at least one of the storage device 1002 and the auxiliary storage device 1003.

[0088] The communication device 1004 is hardware (transmitting / receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, network controller, network card, communication module, etc. The communication device 1004 may be configured to include, for example, a high-frequency switch, duplexer, filter, frequency synthesizer, etc., in order to implement at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the transmitting and receiving antenna, amplifier section, transmitting and receiving section, transmission path interface, etc., may be implemented by the communication device 1004. The transmitting and receiving section may be implemented in a physically or logically separated manner, with a transmitting section and a receiving section.

[0089] The input device 1005 is an input device that accepts input from an external source (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to an external source (e.g., a display, speaker, LED lamp, etc.). The input device 1005 and the output device 1006 may be configured as an integrated unit (e.g., a touch panel).

[0090] Furthermore, each device, such as the processor 1001 and the storage device 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or different buses may be configured for each device.

[0091] Furthermore, the base station 10 and terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array), and some or all of each functional block may be realized by such hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0092] Figure 16 shows an example of the configuration of vehicle 2001. As shown in Figure 16, vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021 to 2029, an information service unit 2012, and a communication module 2013. Each aspect / embodiment described in this disclosure may be applied to a communication device mounted on vehicle 2001, for example, to the communication module 2013.

[0093] The drive unit 2002 consists of, for example, an engine, a motor, or a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel, which is operated by the user.

[0094] The electronic control unit 2010 consists of a microprocessor 2031, memory (ROM, RAM) 2032, and communication ports (IO ports) 2033. Signals from various sensors 2021 to 2029 installed in the vehicle 2001 are input to the electronic control unit 2010. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0095] Signals from various sensors 2021 to 2029 include current signals from current sensor 2021 for sensing motor current, front and rear wheel rotation speed signals acquired by rotation speed sensor 2022, front and rear wheel air pressure signals acquired by air pressure sensor 2023, vehicle speed signals acquired by vehicle speed sensor 2024, acceleration signals acquired by acceleration sensor 2025, accelerator pedal depression signals acquired by accelerator pedal sensor 2029, brake pedal depression signals acquired by brake pedal sensor 2026, shift lever operation signals acquired by shift lever sensor 2027, and detection signals acquired by object detection sensor 2028 for detecting obstacles, vehicles, pedestrians, etc.

[0096] The Information Service Unit 2012 consists of various devices for providing (outputting) various types of information such as driving information, traffic information, and entertainment information, including a car navigation system, audio system, speakers, television, and radio, and one or more ECUs that control these devices. The Information Service Unit 2012 uses information acquired from external devices via a communication module 2013, etc., to provide various multimedia information and multimedia services to the occupants of the vehicle 2001. The Information Service Unit 2012 may include input devices that accept input from the outside (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.) and output devices that perform output to the outside (e.g., display, speaker, LED lamp, touch panel, etc.).

[0097] The driver assistance system unit 2030 consists of various devices that provide functions to prevent accidents or reduce the driver's workload, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning locators (e.g., GNSS), map information (e.g., high-definition (HD) maps, autonomous vehicle (AV) maps), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System)), AI (Artificial Intelligence) chips, and AI processors, as well as one or more ECUs that control these devices. The driver assistance system unit 2030 also transmits and receives various information via the communication module 2013 to realize driver assistance functions or autonomous driving functions.

[0098] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via its communication port. For example, the communication module 2013 sends and receives data via the communication port 2033 between the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, the microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021-29 provided in the vehicle 2001.

[0099] The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with external devices. For example, it can send and receive various types of information with external devices via wireless communication. The communication module 2013 may be located either inside or outside the electronic control unit 2010. The external device may be, for example, a base station or a mobile station.

[0100] The communication module 2013 may transmit at least one of the following to an external device via wireless communication: signals from the various sensors 2021-2028 input to the electronic control unit 2010, information obtained based on said signals, and information based on input from an external source (user) obtained via the information service unit 2012. The electronic control unit 2010, the various sensors 2021-2028, the information service unit 2012, etc., may also be called input units that accept input. For example, the PUSCH transmitted by the communication module 2013 may include the information based on the above input.

[0101] The communication module 2013 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from an external device and displays it on the information service unit 2012 provided in the vehicle 2001. The information service unit 2012 may also be called an output unit, which outputs information (for example, outputs information to devices such as displays and speakers based on the PDSCH (or data / information decoded from the PDSCH) received by the communication module 2013). The communication module 2013 also stores the various information received from the external device in a memory 2032 that can be used by the microprocessor 2031. Based on the information stored in the memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021-2029, etc., provided in the vehicle 2001.

[0102] <Notes> (Note 1) A base station having a distributed unit and a radio unit, wherein the radio unit comprises: a control unit that generates a first message including channel information associated with the same terminal identifier and measured values ​​in an RRM (Radio Resource Management) measurement report required for beamforming based on SRS (Sounding Reference Signal); and a transmission unit that transmits the first message to the distributed unit. (Note 2) The base station according to Note 1, wherein the control unit includes the measured values ​​in the first message which is an extension of an existing specification message for transmitting channel information, or includes a section extension including the measured values ​​in an existing specification message for transmitting channel information. (Note 3) A base station having a distributed unit and a radio unit, wherein the distributed unit includes a receiving unit that receives from the radio unit a first message including channel information and a second message including measured values ​​in an RRM (Radio Resource Management) measurement report required for beamforming based on SRS (Sounding Reference Signal), and a control unit that stores the channel information and the measured values ​​in association with the same terminal identifier, the same frame identifier, and the same slot identifier. (Note 4) The base station according to Note 3, wherein the control unit includes the measured values ​​in the second message which is an extension of an existing specification message for transmitting an RRM measurement report, or includes a section extension including the measured values ​​in an existing specification message for transmitting an RRM measurement report.(Appendix 5) A communication method performed by a base station having a distributed unit and a radio unit, comprising the steps of: generating a first message associated with the same terminal identifier, including channel information and measured values ​​in an RRM (Radio Resource Management) measurement report required in beamforming based on an SRS (Sounding Reference Signal); and transmitting the first message to the distributed unit.

[0103] By any of the provisions of Appendix 1 to Appendix 5, efficient transmission of channel information and RRM measurement reports, taking into account beamforming based on SRS (Sounding Reference Signal), can be achieved at the base station's fronthaul interface.

[0104] (Supplement to Embodiments) Embodiments of the present invention have been described above, but the disclosed invention is not limited to such embodiments, and those skilled in the art will understand various modifications, alterations, alternatives, substitutions, etc. Specific numerical examples have been used to facilitate understanding of the invention, but unless otherwise specified, these numerical values ​​are merely examples, and any appropriate values ​​may be used. The division of items in the above description is not essential to the present invention, and matters described in two or more items may be combined as needed, and matters described in one item may be applied to matters described in another item (as long as they do not contradict each other). The boundaries of functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical parts. The operation of multiple functional units may be physically performed by one part, or the operation of one functional unit may be physically performed by multiple parts. The processing procedures described in the embodiments may be rearranged as long as they do not contradict each other. For the convenience of explaining the processing, the base station 10 and terminal 20 have been described using functional block diagrams, but such devices may be realized in hardware, software, or a combination thereof. The software operated by the processor of the base station 10 according to an embodiment of the present invention and the software operated by the processor of the terminal 20 according to an embodiment of the present invention may be stored in any suitable storage medium such as random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server, or other appropriate storage medium.

[0105] Furthermore, notification of information is not limited to the embodiments described herein and may be carried out by other means. For example, notification of information may be carried out by physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or combinations thereof. Also, RRC signaling may be called RRC messages, and may be, for example, RRC Connection Setup messages, RRC Connection Reconfiguration messages, etc.

[0106] Each aspect / embodiment described in this disclosure refers to LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (where x is, for example, an integer or decimal)), FRA (Future Radio Access), NR (new Radio), New radio access (NX), Future generation radio access (FX), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20 may apply to at least one system utilizing UWB (Ultra-WideBand), Bluetooth®, or other appropriate systems, and to next-generation systems extended, modified, created, or defined based thereon. Alternatively, multiple systems may be applied in combination (e.g., a combination of at least one of LTE and LTE-A with 5G).

[0107] The processing procedures, sequences, flowcharts, etc., of each aspect / embodiment described herein may be reordered, provided they are consistent with each other. For example, the methods described herein present various step elements in an exemplary order and are not limited to that specific order.

[0108] In this specification, specific operations performed by the base station 10 may, in some cases, be performed by its upper node. In a network consisting of one or more network nodes having a base station 10, it is clear that various operations performed for communication with the terminal 20 can be performed by the base station 10 and at least one of the other network nodes (for example, an MME or S-GW, but not limited to these). Although the above example illustrates the case where there is one other network node besides the base station 10, the other network node may be a combination of multiple other network nodes (for example, an MME and an S-GW).

[0109] The information or signals described in this disclosure may be output from a higher layer (or lower layer) to a lower layer (or higher layer). They may also be input and output via multiple network nodes.

[0110] Input and output information may be stored in a specific location (e.g., memory) or managed using a management table. Input and output information may be overwritten, updated, or appended to. Output information may be deleted. Input information may be transmitted to other devices.

[0111] The determination in this disclosure may be made by a value represented by one bit (0 or 1), by a Boolean value (true or false), or by a numerical comparison (for example, a comparison with a predetermined value).

[0112] Software should be broadly interpreted to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, and so on, whether they are called software, firmware, middleware, microcode, hardware description languages, or by any other name.

[0113] Furthermore, software, instructions, information, etc., may be transmitted and received via a transmission medium. For example, if software is transmitted from a website, server, or other remote source using at least one of wired technology (such as coaxial cable, fiber optic cable, twisted pair, or digital subscriber line (DSL)) and wireless technology (such as infrared or microwave), then at least one of these wired and wireless technologies is included in the definition of a transmission medium.

[0114] The information, signals, etc. described in this disclosure may be represented using any of the various different techniques. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0115] In addition, terms used in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of the channel and symbol may be a signal (signaling). Also, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, cell, frequency carrier, etc.

[0116] The terms “system” and “network” as used in this disclosure are interchangeable.

[0117] Furthermore, the information, parameters, etc., described in this disclosure may be expressed using absolute values, relative values ​​from a given value, or corresponding other information. For example, wireless resources may be indicated by an index.

[0118] The names used for the parameters described above are not restrictive in any way. Furthermore, the formulas and other expressions using these parameters may differ from those expressly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, and therefore, the various names assigned to these various channels and information elements are not restrictive in any way.

[0119] In this disclosure, terms such as "Base Station (BS)", "wireless base station", "base station equipment", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0120] A base station can accommodate one or more (e.g., three) cells. If a base station accommodates multiple cells, the entire coverage area of ​​the base station can be divided into multiple smaller areas, each of which may also be provided with communication services by a base station subsystem (e.g., a Remote Radio Head (RRH)). The terms “cell” or “sector” refer to part or all of the coverage area of ​​at least one of the base station and / or base station subsystems that provide communication services in that coverage.

[0121] In this disclosure, the transmission of information by a base station to a terminal may be interpreted as the base station instructing the terminal to perform control or operation based on the information.

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

[0123] A mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or several other appropriate terms.

[0124] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may also be a device mounted on a mobile body, the mobile body itself, etc. The mobile body refers to a movable object, and its speed of movement is arbitrary. This also includes the case when the mobile body is stationary. The mobile body includes, but is not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcarts, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones (registered trademark), multicopters, quadcopters, balloons, and items mounted on them. The mobile body may also be a mobile body that moves autonomously based on operation commands. It may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Furthermore, at least one of the base station and the mobile station may include devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

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

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

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

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

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

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

[0131] Any reference to elements using the designations “first,” “second,” etc., as used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Accordingly, references to the first and second elements do not imply that only two elements may be employed, or that the first element must precede the second element in any way.

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

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

[0134] In this disclosure, if articles are added through translation, such as a, an, and the in English, this disclosure may include the fact that the noun following these articles is plural.

[0135] In this disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "combine" may be interpreted similarly to "different."

[0136] Each aspect / embodiment described in this disclosure may be used individually, in combination, or switched between as needed during implementation. Furthermore, notification of specific information (e.g., notification that "X is") is not limited to explicit notification, but may also be implicit (e.g., by not providing such notification).

[0137] Although the present disclosure has been described in detail above, it will be clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the intent and scope of the present disclosure as defined by the claims. Therefore, the descriptions in the present disclosure are illustrative and not intended to be restrictive in any way.

[0138] This patent application claims priority based on Japanese Patent Application No. 2025-025555, filed on 20 February 2025, and the entire contents of Japanese Patent Application No. 2025-025555 are incorporated herein by reference.

[0139] 10 Base station 110 Transmitting unit 120 Receiving unit 130 Setting unit 140 Control unit 20 Terminal 210 Transmitting unit 220 Receiving unit 230 Setting unit 240 Control unit 30 Network node 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device 2001 Vehicle 2002 Drive unit 2003 Steering unit 2004 Accelerator pedal 2005 Brake pedal 2006 Shift lever 2007 Front wheel 2008 Rear wheel 2009 Axle 2010 Electronic control unit 2012 Information service unit 2013 Communication module 2021 Current sensor 2022 Rotation speed sensor 2023 Air pressure sensor 2024 Vehicle speed sensor 2025 Acceleration sensor 2026 Brake pedal sensor 2027 Shift lever sensor 2028 Object detection sensor 2029 Accelerator pedal sensor 2030 Driver assistance system unit 2031 Microprocessor 2032 Memory (ROM, RAM) 2033 Communication port (I / O port)

Claims

1. A base station having a distributed unit and a radio unit, wherein the radio unit comprises: a control unit that generates a first message including channel information associated with the same terminal identifier and measured values ​​in an RRM (Radio Resource Management) measurement report required for beamforming based on an SRS (Sounding Reference Signal); and a transmission unit that transmits the first message to the distributed unit.

2. The base station according to claim 1, wherein the control unit includes the measured value in the first message which is an extension of an existing specification message for transmitting channel information, or includes a section extension including the measured value in the existing specification message for transmitting channel information.

3. A base station having a distributed unit and a radio unit, wherein the distributed unit includes a receiving unit that receives from the radio unit a first message including channel information and a second message including measured values ​​in an RRM (Radio Resource Management) measurement report required for beamforming based on SRS (Sounding Reference Signal), and a control unit that stores the channel information and the measured values ​​in association with the same terminal identifier, the same frame identifier, and the same slot identifier.

4. The base station according to claim 3, wherein the control unit includes the measured value in the second message which is an extension of an existing specification message for transmitting an RRM measurement report, or includes a section extension including the measured value in the existing specification message for transmitting an RRM measurement report.

5. A communication method performed by a base station having a distributed unit and a radio unit, comprising the steps of: generating a first message associated with the same terminal identifier, including channel information and measured values ​​in an RRM (Radio Resource Management) measurement report required for beamforming based on an SRS (Sounding Reference Signal); and transmitting the first message to the distributed unit.

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