Radio base station and radio communication method

Abstract

This radio base station executes setting in a radio resource control layer with a radio relay device provided with a reflection plate, and receives a setup completion message from the radio relay device. The radio base station receives the setup completion message including identification information for identifying the radio relay device.

Description

Radio base station and radio communication method

[0001] The present disclosure relates to a radio base station and a radio communication method that support RIS.

[0002] The 3rd Generation Partnership Project (3GPP) is developing specifications for the 5th generation mobile communication system (5G, also known as New Radio (NR) or Next Generation (NG)), and is also developing specifications for the next generation, known as Beyond 5G, 5G Evolution, or 6G.

[0003] For 6G, the introduction of Reconfigurable Intelligent Surfaces (RIS) is being considered. These reflectors will be attached to walls or windows to control the reflection or transmission of radio waves, forming coverage areas and improving various wireless performance. RIS is expected to contribute to the utilization of high-frequency bands, which have particularly good directionality.

[0004] The specific architecture of the RIS is currently under study in 3GPP. For example, an architecture in which the RIS is controlled by a radio base station (gNB) has been proposed (Non-Patent Document 1). Specifically, it has been proposed that the RIS be equipped with a function (RIS-MT (Mobile Termination)) for connecting to the gNB via a control link and a reflector function (RIS-panel). Mobile RIS, in which the RIS is mounted on a moving object such as a vehicle, is also envisioned.

[0005] "Motivation of study on Reconfigurable Intelligent Surface", RP-231916, 3GPP TSG RAN#101, 3GPP, September 2023

[0006] As mentioned above, the RIS may have mobility while also having the functionality of a sophisticated reflector, and is expected to have functions similar to those of a terminal (User Equipment, UE).

[0007] However, the radio base station cannot efficiently and reliably identify the RIS while taking into account the functions implemented in such a RIS.

[0008] Therefore, the following disclosure has been made in consideration of this situation, and aims to provide a radio base station and a radio communication method that can efficiently and reliably identify a RIS while taking into account the functions implemented in the RIS.

[0009] One aspect of the present disclosure is a radio base station (gNB100) comprising a control unit (control unit 140) that performs configuration in a radio resource control layer with a radio relay device (RIS300) equipped with a reflector, and a receiving unit (RIS management unit 120) that receives a setup completion message of the radio resource control layer from the radio relay device, wherein the receiving unit receives the setup completion message including identification information that identifies it as the radio relay device.

[0010] One aspect of the present disclosure is a radio base station comprising a control unit (control unit 140) that performs configuration in a radio resource control layer with a radio relay device equipped with a reflector, and a receiving unit that receives a setup request message of the radio resource control layer from the radio relay device, the receiving unit receiving the setup request message including identification information that identifies the radio relay device.

[0011] One aspect of the present disclosure is a wireless base station comprising a control unit (control unit 140) that executes a random access procedure with a wireless relay device equipped with a reflector, and a receiving unit (RIS management unit 120) that receives a random access channel from the wireless relay device using wireless resources dedicated to the wireless relay device, and the control unit is a wireless base station that identifies the wireless relay device based on the use of the wireless resources.

[0012] One aspect of the present disclosure is a wireless base station comprising a control unit (control unit 140) that performs configuration in a radio resource control layer with a wireless relay device equipped with a reflector, and a transmission unit (network interface unit 130) that transmits an initial message associated with the configuration to a network, the transmission unit transmitting the initial message including identification information that identifies the wireless relay device.

[0013] FIG. 1 is a schematic diagram of the overall configuration of a wireless communication system 10. FIG. 2 is a functional block diagram of a gNB 100. FIG. 3 is a functional block diagram of a RIS 300. FIG. 4 is a diagram showing an example of control of the RIS by the network. FIG. 5 is a diagram showing an example of a transmission sequence of an RRC Setup Complete. FIG. 6 is a diagram showing an example of a transmission sequence of an RRC Setup Request. FIG. 7 is a diagram showing an example 1 of a transmission sequence of an Initial UE message. FIG. 8 is a diagram showing an example 2 of a transmission sequence of an Initial UE message. FIG. 9 is a diagram showing an example of the hardware configuration of the gNB 100 and the RIS 300. FIG. 10 is a diagram showing an example of the configuration of a vehicle 2001.

[0014] Hereinafter, embodiments will be described with reference to the drawings. Note that the same or similar reference numerals are used to designate the same functions or configurations, and descriptions thereof will be omitted as appropriate.

[0015] (1) Overall Schematic Configuration of Wireless Communication System Fig. 1 is an overall schematic configuration diagram of a wireless communication system 10 according to this embodiment. In this embodiment, the wireless communication system 10 is a wireless communication system conforming to 6G, and includes a 6G Radio Access Network 20 (hereinafter, 6GRAN 20), a terminal 200 (User Equipment 200, hereinafter, UE 200), and a RIS 300 (Reconfigurable Intelligent Surface).

[0016] The wireless communication system 10 may include a wireless communication system conforming to another wireless communication standard, such as 5G New Radio (NR). The wireless communication system 10 may also support functions related to the Industrial Internet of Things (IIoT) and Ultra-Reliable and Low Latency Communications (URLLC).

[0017] The 6GRAN 20 includes a radio base station 100 (hereinafter, gNB 100). Note that the specific configuration of the radio communication system 10, including the number of gNBs and UEs, is not limited to the example shown in FIG.

[0018] The gNB 100 may also employ a fronthaul (FH) interface defined by the Open Radio Access Network Alliance (O-RAN). The gNB 100 may include an O-RAN Distributed Unit (O-DU) and an O-RAN Radio Unit (O-RU). The gNB 100 can function as a type of NG-RAN node (wireless communication node).

[0019] The 6GRAN 20 includes a plurality of 6G RAN nodes, specifically, gNBs (or ng-eNBs). The 6GRAN 20 is connected to the 6GC 30, which is a core network (CN) conforming to 6G. The 6GC 30 may adopt the concept of CUPS (Control and User Plane Separation), in which the functions of the user plane and the control plane are clearly separated.

[0020] 6GC30 may include a logical node (network device) that provides a network function (NF). The NF may include an Access and Mobility Management Function (AMF) that provides access and mobility management functions for UE200, a Session Management Function (SMF) that provides session management functions, and a Location Management Function (LMF) that controls communications related to location-based services defined in 5GC. Furthermore, a UDM / UDR (Unified Data Management / User Data Repository) may be connected to the AMF and / or SMF. Note that 6GRAN20 and 6GC30 may simply be referred to as a "network."

[0021] Furthermore, 6GRAN 20 may be connected to a server managed by a 3GPP service provider or a server (3GPP or non-3GPP server) managed by a party other than the provider.

[0022] The gNB100 is a radio base station conforming to 6G and performs radio communication with the UE200 conforming to 6G. The gNB100 may be configured with a CU (Central Unit) and a DU (Distributed Unit), and the DU may be separated from the CU and installed in a different geographical location. One or more DUs may be connected to the CU. The gNB100 (gNB-CU) may be connected to each other via an Xn interface, and the CU and DU may be connected to each other via an F1 interface. The gNB100 (CU) may be connected to an AMF or the like via an NG interface (which may be called by a different name).

[0023] The gNB 100 and the UE 200 can support Massive MIMO, which generates a more directional beam by controlling radio signals transmitted from multiple antenna elements, Carrier Aggregation (CA), which aggregates multiple component carriers (CCs), and Dual Connectivity (DC), which simultaneously communicates between the UE and multiple NG-RAN nodes. The UE 200 may also perform handover (HO) to a different RAT.

[0024] In a broad sense, the mobility of UE200 may mean the ease of movement and maneuverability of UE200, but in this embodiment, it may also mean minimizing call drops, radio link (including beam) failures, unnecessary handovers, ping-pong states, etc.

[0025] The UE 200 may periodically perform measurement reporting. The UE 200 may perform measurement reporting for each event. An entering condition for starting measurement reporting and a leaving condition for terminating measurement reporting may be defined for each event. The entering condition may be interpreted as a condition for determining whether or not to include a UE in a measurement report target, and the leaving condition may be interpreted as a condition for determining whether or not to exclude a UE from a measurement report target.

[0026] The UE 200 may have two independent protocol stacks. Specifically, the UE 200 may have two protocol stacks each including a physical layer (PHY), a medium access control layer (MAC), a radio link control layer (RLC), a packet data convergence protocol layer (PDCP), a radio resource control layer (RRC), and a non-access stratum (NAS). Such a protocol stack may be called a dual stack.

[0027] The RIS300 may be considered a type of reflector that is attached to a wall or window glass to control the reflection or transmission of radio waves to form an area and improve various wireless performances. The RIS300 is equipped with such a reflector and can achieve distributed antenna deployment (Multi-TRP), which deploys multiple antenna devices in a distributed manner, and improve wireless performance.

[0028] In addition to being referred to as a reflector, the RIS 300 may also be referred to as a battery-less device, a metamaterial functional device, an IRS (Intelligent Reflecting Surface), a smart repeater, a wireless relay device, etc. The RIS 300 may be installed at a specific location or may be mounted on a moving object such as an automobile or train and move around. Such a moving RIS may also be referred to as a mobile RIS. The mobile RIS may be suitably used, for example, to relay wireless communications with a UE mounted on a UAV (Unmanned Aerial Vehicle) such as a drone.

[0029] The RIS 300 may also have the following functions, for example.

[0030] ・(UE functions) ・Reception function of signals transmitted from radio base stations (e.g., DL (downlink) signals, SSB (SS Block), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), DM-RS (DeModulation Reference Signal), PT-RS (Phase Tracking Reference Signal), CSI-RS (Channel Status Information Reference Signal), RIS-dedicated signals) This may include reception of information related to the following metamaterial functions.

[0031] - Function of transmitting signals to radio base stations (e.g., UL (uplink) signals, PRACH (Random Access Channel Preamble), PUCCH (Physical Uplink Control Channel), PUSCH (Physical Uplink Control Channel), DM-RS, PT-RS, SRS (Sounding Reference Signal), RIS-dedicated signals) This may include transmitting information related to the following metamaterial functions:

[0032] - Frame synchronization function with radio base station - (Metamaterial function) - Reflection function of signals transmitted from radio base station or UE (e.g., phase change) Functions related to beam control (e.g., functions related to control of TCI (Transmission Configuration Indication)-state, QCL (Quasi Co Location), beam selection and application, spatial filter / precoding weight selection and application) - Power change function of signals transmitted from radio base station or UE (e.g., power amplification) Furthermore, "receive and transmit" or "relay" in RIS300 may mean that up to specified function A below is performed, but the signal is transmitted without performing specified function B.

[0033] A: A phase shifter is applied, but B: no compensation circuit (e.g., amplifier, filter) is used.

[0034] ・A: A phase shifter and compensation circuit are applied, but B: no frequency conversion is performed.

[0035] The RIS 300 may amplify the amplitude when the phase is changed. "Relay" may mean transmitting the received signal as is without performing layer 2 / 3 level processing, transmitting the received signal as is at the physical layer, or transmitting the received signal as is without signal interpretation (in which case, the phase may be changed or the amplitude may be amplified).

[0036] The RIS300 may operate standalone or may be controlled by the gNB100 (6GRAN20) or 6GC30. For example, when the RIS300 is controlled by the gNB100, the RIS300 may have a function (RIS-MT (Mobile Termination)) for connecting with the gNB100 via a control link and a reflector function (RIS-panel).

[0037] In this embodiment, the channels include a control channel and a data channel, such as a physical downlink control channel (PDCCH), a physical uplink control channel (PUCCH), a physical random access channel (PRACH), and a physical broadcast channel (PBCH).

[0038] The data channels include a physical downlink shared channel (PDSCH) and a physical uplink shared channel (PUSCH).

[0039] The reference signal includes a Demodulation Reference Signal (DMRS), a Sounding Reference Signal (SRS), a Phase Tracking Reference Signal (PTRS), and a Channel State Information-Reference Signal (CSI-RS), and the signal includes a channel and a reference signal. Furthermore, the data may refer to data transmitted via a data channel.

[0040] (2) Functional Block Configuration of Wireless Communication System Next, the functional block configuration of the wireless communication system 10 will be described. Specifically, the functional block configurations of the gNB 100 and the RIS 300 will be described. Fig. 2 is a functional block configuration diagram of the gNB 100. Fig. 3 is a functional block configuration diagram of the RIS 300.

[0041] (2.1) gNB100 As shown in FIG. 2, the gNB100 includes a wireless communication unit 110, a RIS management unit 120, a network interface unit 130, and a control unit 140.

[0042] The wireless communication unit 110 transmits downlink signals (DL signals) conforming to 6G. The wireless communication unit 110 also receives uplink signals (UL signals) conforming to 6G. The wireless communication unit 110 may transmit DL signals and receive UL signals using one or more transmit / receive points (TRPs). In this embodiment, a TRP may be interpreted as meaning multiple transmit antennas for DL.

[0043] The RIS management unit 120 manages the RIS 300 that performs relay processing between the UE 200 and the RIS 300. Specifically, the RIS management unit 120 may manage the authentication status, identification information, supportability, etc. of the RIS 300. The RIS to be managed may include not only a RIS installed in a specific location but also a mobile RIS that can be moved.

[0044] More specifically, the RIS management unit 120 may manage, for each RIS, the authentication status of the RIS notified by the 6GC 30. The authentication status may indicate whether the RIS is authorized or not authorized by the network.

[0045] The RIS management unit 120 may manage identification information that can identify the RIS 300. The identification information may be called a RIS-node indication, and is not particularly limited as long as it can identify the RIS 300. The identification information may be information that can identify the type of RIS. The types of RIS may include, for example, a RIS node (which may include a standalone RIS), a Mobile RIS, and a RIS-MT.

[0046] In addition, to uniquely identify the RIS, the same identification information as that of the UE may be used. The RIS management unit 120 may identify the RIS and / or identify the type of RIS based on the identification information. For example, any of the following information may be used as the identification information of the RIS:

[0047] ・GUTI (Global Unique Temporary ID), S-TMSI (Serving Temporary Mobile Subscriber Identity) ・SUPI (Subscription Permanent Identifier), SUCI (Subscription Concealed Identifier) ​​・IMSI (International Mobile Subscriber Identity), IMEI (International Mobile Equipment Identity), IMEISV (Software Version), Masked IMEISV ・MAC address ・EUI (Extended Unique Identifier)-64 The RIS management unit 120 may manage whether or not a RIS is supported in a cell (which may also be called a subordinate cell) formed by the gNB100. Specifically, the RIS management unit 120 may manage whether or not a specific type of RIS (e.g., RIS node, Mobile RIS, and RIS-MT) is supported.

[0048] The RIS management unit 120 may also manage whether or not to permit RIS access to a cell formed by the gNB 100. Specifically, the RIS management unit 120 may manage whether or not to permit a specific type of RIS (e.g., RIS node, Mobile RIS, and RIS-MT). The RIS management unit 120 may broadcast system information (SIB: System Information Block) within the cell indicating support and / or permission of the RIS.

[0049] Furthermore, the RIS management unit 120 may transmit and receive messages of a radio resource control layer (RRC) to and from the RIS 300. In particular, in this embodiment, the RIS management unit 120 may receive a setup completion message of the radio resource control layer, specifically, an RRC Setup Complete, from the RIS 300. In this embodiment, the RIS management unit 120 may constitute a receiving unit. The RIS management unit 120 may receive the RRC Setup Complete that includes identification information that identifies the RIS 300.

[0050] Furthermore, the RIS management unit 120 may receive a setup request message of the radio resource control layer, specifically, an RRC Setup Request, from the RIS 300. The RIS management unit 120 may receive the RRC Setup Request including identification information that identifies the RIS 300.

[0051] The RIS identification information may indicate that the sender of the RRC Setup Complete or RRC Setup Request is a RIS (which may include a Mobile RIS), or may indicate the type of RIS (RIS node, Mobile RIS, or RIS-MT).

[0052] The RIS management unit 120 may receive a random access channel (RACH) using radio resources dedicated to the RIS 300 from the RIS 300. Specifically, the RIS management unit 120 may receive an RA preamble conforming to a contention-based random access procedure (CBRA) from the RIS 300. The RA preamble may use radio resources allocated exclusively to the RIS.

[0053] The RIS management unit 120 may transmit system information (SIB) instructing the radio resource to the RIS 300. In this embodiment, the RIS management unit 120 may constitute a transmission unit.

[0054] The network interface unit 130 provides an Xn interface between gNBs and an interface (e.g., NG) between the gNB and the AMF. The network interface unit 130 may perform processing via the interfaces.

[0055] For example, the network interface unit 130 may transmit an Initial UE message to the 6GC 30 (e.g., AMF). Also, the network interface unit 130 may receive an Initial context setup request for the Initial UE message from the 6GC 30. The Initial UE message may be interpreted as an initial message associated with settings in the radio resource control layer. The network interface unit 130 may transmit the initial message associated with settings in the radio resource control layer to the network.

[0056] The network interface unit 130 may transmit an Initial UE message including identification information identifying the RIS 300. In this embodiment, the network interface unit 130 may constitute a transmitter that transmits the initial message. As described above, the identification information may indicate that the RIS is a RIS (which may include a Mobile RIS), or may indicate the type of RIS (RIS node, Mobile RIS, or RIS-MT).

[0057] The control unit 140 controls each functional block that constitutes the gNB 100. In particular, in this embodiment, the control unit 140 can execute control related to the setting of a communication path (wireless link) with the UE 200 via the RIS 300.

[0058] Specifically, the control unit 140 may perform settings for the control plane (C-plane) via the RIS 300 and settings for the user plane (U-plane) via the RIS 300. The settings may take into consideration the authentication status, identification information, and supportability of the RIS 300.

[0059] More specifically, the control unit 140 may perform settings in a radio resource control (RRC) layer with the RIS 300. The control unit 140 may also perform a random access procedure (RA procedure) with the RIS 300.

[0060] As described above, the RA procedure with the RIS 300 may use radio resources allocated exclusively to the RIS. The control unit 140 may identify that the other party in the RA procedure is the RIS 300 based on the fact that the dedicated radio resources are used.

[0061] (2.2) RIS 300 As shown in FIG. 3, the RIS 300 includes a RIS-MT unit 310, a RIS-Panel unit 320, a system information receiving unit 330, and a control unit 340.

[0062] The RIS-MT unit 310 provides the function of RIS-MT (Mobile Termination). Specifically, the RIS-MT unit 310 provides a function for the RIS 300 to connect to the gNB 100 via a control link. MT may be interpreted as a function for connecting to a wireless communication node (upper node) such as a gNB located upstream (upper) from the RIS 300. MT may also be interpreted as an antonym of DU (Distributed Unit), which is a function for connecting to a lower node such as a UE.

[0063] The RIS-Panel unit 320 provides a reflector function (RIS-panel). Specifically, the RIS-Panel unit 320 can reflect radio waves in a specific direction. As described above, the RIS-Panel unit 320 not only simply reflects radio waves, but also has a metamaterial function and may provide functions such as phase shifting and power amplification.

[0064] The RIS-MT unit 310 and the RIS-Panel unit 320 may have specific functions set by control from the network (which may include the gNB 100).

[0065] The system information receiving unit 330 receives system information (SIB) broadcast from the network (gNB 100). In particular, in this embodiment, the system information receiving unit 330 may receive an SIB including an information element (IE) indicating whether RIS is supported or allowed in the cell.

[0066] Additionally, the system information receiver 330 may receive a SIB that includes an information element (IE) indicating the type of RIS supported or allowed in the cell.

[0067] The control unit 340 controls each functional block constituting the RIS 300. In particular, in this embodiment, the control unit 340 may determine whether the RIS is supported and / or permitted in the cell based on the IE included in the SIB received by the system information receiving unit 330.

[0068] Furthermore, the control unit 340 may determine the type of RIS that is supported or permitted in the cell based on the IE included in the SIB received by the system information receiving unit 330.

[0069] If the control unit 340 receives an SIB including an IE indicating that the RIS is supported in the cell, the control unit 340 may consider that the RIS is permitted to access the cell.

[0070] (3) Operation of the Wireless Communication System Next, a description will be given of the operation of the wireless communication system 10. Specifically, the operation relating to authentication, identification and support of the RIS 300 by the network will be described.

[0071] (3.1) Premise and Issues As mentioned above, RIS is a type of reflector that improves various wireless performances, and it is expected that RIS will be used particularly in cases where high frequencies with high directivity are used.

[0072] 4 shows an example of network-based RIS control. As shown in FIG. 4, the 6GC 30 and the gNB 100 can control the RIS 300 via a wireless control link. In such a configuration, the RIS 300 may include the RIS-MT unit 310 and the RIS-Panel unit 320, as described above. Note that the RIS 300 may include UE-equivalent functionality (in the case of a control architecture conforming to OAM) instead of the RIS-MT unit 310, or may include autonomous control functionality (in the case of a standalone system).

[0073] However, in such a control architecture that includes a RIS, there is a problem in that the gNB cannot distinguish and identify the RIS from UEs, etc.

[0074] (3.2) Operational Example An operational example that can solve the above-mentioned problem will be described below. The RRC Setup Complete transmitted from the RIS 300 (RIS node or RIS-MT, hereinafter the same) to the gNB may include identification information of the RIS.

[0075] Fig. 5 shows an example of a transmission sequence of RRC Setup Complete. RRC Setup Complete may be interpreted as part of the RA procedure and may be called Msg. 5. As shown in Fig. 5, RRC Setup Complete may include an information element (IE) indicating the type of RIS. Note that, as described above, RRC Setup Complete may include information indicating that it is a RIS, rather than the type of RIS.

[0076] 6 shows an example of a transmission sequence of an RRC Setup Request. The RRC Setup Request may be interpreted as part of the RA procedure and may be referred to as Msg. 3. As shown in FIG. 6, the RRC Setup Request may include an information element (IE) indicating the type of RIS.

[0077] Furthermore, when the RIS 300 transmits a RACH preamble (RA preamble) to the gNB 100, a dedicated RACH resource (radio resource) may be used as described above. When the gNB 100 receives an RA preamble using the dedicated RACH resource, the gNB 100 may recognize that the source of the RA preamble is not a normal UE but the RIS. The dedicated RACH resource may be broadcast within the cell by system information (e.g., SIB1). The RIS 300 may transmit the RA preamble using the dedicated RACH resource based on the received SIB1.

[0078] Fig. 7 shows an example 1 of a transmission sequence of an Initial UE message. As shown in Fig. 7, the Initial UE message may include an information element (IE) indicating the type of RIS (RIS node or RIS-MT).

[0079] Fig. 8 shows an example 2 of a transmission sequence of the Initial UE message. As shown in Fig. 8, the Initial UE message may include an information element (IE) indicating the type of RIS (Mobile RIS node or RIS-MT).

[0080] According to the above-described embodiment, the RIS identification information can be notified using a setup complete message, a setup request message, or an initial message of the radio resource control layer, which allows the gNB100 and the 6GC30 to efficiently and reliably identify the RIS while taking into account the functions implemented in the RIS.

[0081] (4) Other Embodiments Although the embodiments have been described above, it will be obvious to those skilled in the art that the present invention is not limited to the description of the embodiments, and that various modifications and improvements are possible.

[0082] For example, in the above-described embodiment, it is assumed that the RIS has a RIS-MT, but the control method of the RIS does not necessarily have to be an architecture based on MT.

[0083] In the above description, configure, activate, update, indicate, enable, specify, and select may be interchangeable. Similarly, link, associate, correspond, and map may be interchangeable, and allocate, assign, monitor, and map may be interchangeable.

[0084] Furthermore, specific, dedicated, UE-specific, and UE-dedicated may be interchangeable. Similarly, common, shared, group-common, UE-common, and UE-shared may be interchangeable.

[0085] In the present disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," etc. may be used interchangeably.

[0086] Furthermore, the block diagrams (FIGS. 2 and 3) used in the description of the above-described embodiments show functional blocks. These functional blocks (components) are realized by any combination of hardware and / or software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (e.g., wired, wireless, etc.) and these multiple devices. The functional block may also be realized by combining software with the single device or multiple devices.

[0087] Functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission is called a transmitting unit or transmitter. As mentioned above, there are no particular limitations on how each is implemented.

[0088] Furthermore, the gNB 100 and RIS 300 (the devices) described above may function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 9 is a diagram showing an example of the hardware configuration of the device. As shown in Figure 9, the device may be configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, and a bus 1007.

[0089] In the following description, the term "apparatus" can be interpreted as a circuit, a device, a unit, etc. The hardware configuration of the apparatus may be configured to include one or more of the apparatuses shown in the drawings, or may be configured to exclude some of the apparatuses.

[0090] Each functional block of the device (see FIGS. 2 and 3) is realized by any hardware element of the computer device or a combination of the hardware elements.

[0091] In addition, each function of the device is realized by loading specified software (programs) onto hardware such as processor 1001 and memory 1002, causing processor 1001 to perform calculations, control communication via communication device 1004, and control at least one of reading and writing data in memory 1002 and storage 1003.

[0092] The processor 1001 controls the entire computer by running, for example, an operating system, and may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control unit, an arithmetic unit, and registers.

[0093] The processor 1001 also reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and executes various processes in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. Furthermore, the various processes described above may be executed by a single processor 1001, or may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The programs may be transmitted from a network via a telecommunications line.

[0094] The memory 1002 is a computer-readable recording medium and may be configured by at least one of, for example, a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), etc. The memory 1002 may also be called a register, a cache, a main memory (primary storage device), etc. The memory 1002 may store a program (program code), a software module, etc., capable of executing a method according to an embodiment of the present disclosure.

[0095] Storage 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a Compact Disc ROM (CD-ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray disc), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy disk, a magnetic strip, etc. Storage 1003 may also be referred to as an auxiliary storage device. The above-mentioned recording medium may be, for example, a database, a server, or other suitable medium including at least one of memory 1002 and storage 1003.

[0096] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, or a communication module.

[0097] The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize, for example, at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD).

[0098] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, an LED lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0099] Furthermore, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0100] Furthermore, the device may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0101] Furthermore, the notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., RRC signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB))), other signals, or a combination thereof. Furthermore, the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0102] Each aspect / embodiment described in the present disclosure may be applied to at least one of a system using Long Term Evolution (LTE), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, a 4th generation mobile communication system (4G), a 5th generation mobile communication system (5G), a 6th generation mobile communication system (6G), an xth generation mobile communication system (xG) (where x is, for example, an integer or a decimal), Future Radio Access (FRA), New Radio (NR), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other suitable system, and a next-generation system extended based on these. Furthermore, a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A with 5G) may also be applied.

[0103] The order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed unless it is consistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0104] In the present disclosure, a specific operation described as being performed by a base station may also be performed by its upper node in some cases. In a network consisting of one or more network nodes having a base station, it is clear that various operations performed for communication with a terminal may be performed by at least one of the base station and another network node other than the base station (e.g., MME or S-GW, etc., but are not limited to these). Although the above example illustrates a case where there is one other network node other than the base station, a combination of multiple other network nodes (e.g., MME and S-GW) may also be used.

[0105] Information, signals (information, etc.) may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer), or may be input and output via multiple network nodes.

[0106] The input and output information may be stored in a specific location (for example, a memory) or may be managed using a management table. The input and output information may be overwritten, updated, or added. The output information may be deleted. The input information may be transmitted to another device.

[0107] The determination may be made based on a value represented by one bit (0 or 1), a Boolean value (true or false), or a numerical comparison (e.g., comparison with a predetermined value).

[0108] The aspects / embodiments described in this disclosure may be used alone, in combination, or switched depending on the implementation. Notification of predetermined information (e.g., notification that "X is true") is not limited to explicit notification, but may be implicit (e.g., not notifying the predetermined information).

[0109] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0110] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), then these wired and / or wireless technologies are included within the definition of transmission media.

[0111] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0112] Note that terms described 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 a channel and a symbol may be a signal (signaling). Furthermore, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.

[0113] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0114] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by an index.

[0115] The names used for the above-described parameters are not intended to be limiting in any way. Furthermore, the mathematical expressions using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0116] In this disclosure, terms such as "base station (BS)," "radio base station," "fixed station," "NodeB," "eNodeB (eNB)," "gNodeB (gNB)," "access point," "transmission point," "reception point," "transmission / reception point," "cell," "sector," "cell group," "carrier," and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0117] A base station can accommodate one or more (e.g., three) cells (also called sectors). When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can be provided with communication services by a base station subsystem (e.g., a small indoor base station (Remote Radio Head: RRH)).

[0118] The terms "cell" or "sector" refer to part or all of the coverage area of ​​a base station and / or base station subsystem that provides communication services within that coverage area.

[0119] In the present disclosure, the base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control or operate based on the information.

[0120] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0121] 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 some other suitable terminology.

[0122] At least one of the base station and the mobile station may be referred to as a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, etc. The mobile object refers to a movable object, and may move at any speed. Naturally, this also includes cases where the mobile object is stationary. Examples of the mobile object include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones (registered trademark), multicopters, quadcopters, balloons, and objects mounted thereon. The mobile object may also be a mobile object that moves autonomously based on an operational command. It may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may be a device that does not necessarily move during communication 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.

[0123] Furthermore, a base station in the present disclosure may be read as a mobile station (user terminal, the same applies hereinafter). For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a mobile station is replaced with communication between multiple mobile stations (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the mobile station may be configured to have the functions of a base station. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, terms such as an uplink channel and a downlink channel may be read as a side channel (or sidelink).

[0124] Similarly, a mobile station in the present disclosure may be interpreted as a base station, in which case the base station may have the functions of a mobile station.

[0125] A radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0126] Numerology may be communication parameters that apply to the transmission and / or reception of a signal or channel, such as subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering operations performed by the transceiver in the frequency domain, and specific windowing operations performed by the transceiver in the time domain.

[0127] A slot may consist of one or more symbols in the time domain (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol, a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) A slot may be a numerology-based time unit.

[0128] A slot may include multiple minislots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

[0129] The radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals, and may be referred to by other names corresponding to the radio frame, subframe, slot, minislot, and symbol.

[0130] For example, one subframe may be referred to as a transmission time interval (TTI), multiple consecutive subframes may be referred to as a TTI, or one slot or one minislot may be referred to as a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.

[0131] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station schedules each user terminal to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) in TTI units. Note that the definition of TTI is not limited to this.

[0132] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0133] In addition, when one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling, and the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0134] A TTI having a time length of 1 ms may be referred to as a regular TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be referred to as a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0135] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0136] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may be determined based on numerology.

[0137] The time domain of an RB may include one or more symbols and may have a length of one slot, one minislot, one subframe, or one TTI, each of which may consist of one or more resource blocks.

[0138] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0139] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0140] A Bandwidth Part (BWP) (which may also be referred to as a fractional bandwidth) may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a common reference point of the carrier. PRBs may be defined in a given BWP and numbered within that BWP.

[0141] The BWP may include a BWP for UL (UL BWP) and a BWP for DL ​​(DL BWP). One or more BWPs may be configured for a UE within one carrier.

[0142] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0143] The above-described structures of the radio frame, subframe, slot, minislot, and symbol are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and other configurations may be changed in various ways.

[0144] The terms "connected," "coupled," or any variation thereof, refer to 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" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access." As used in this disclosure, two elements may be considered to be "connected" or "coupled" to each other using one or more wires, cables, and / or printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.

[0145] The reference signal may also be abbreviated as Reference Signal (RS) and may be called a pilot depending on the applicable standard.

[0146] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0147] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc.

[0148] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed therein or that the first element must precede the second element in some way.

[0149] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, when the term "or" is used in this disclosure, it is not intended to be an exclusive or.

[0150] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0151] As used in this disclosure, the terms "determining" and "determining" may encompass a wide variety of actions. "Determining" and "determining" may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (e.g., searching in a table, database, or other data structure), ascertaining, and the like. "Determining" and "determining" may also include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and the like. Furthermore, "judgment" and "decision" can include regarding resolving, selecting, choosing, establishing, comparing, etc. as having been "judged" or "decided." In other words, "judgment" and "decision" can include regarding some action as having been "judged" or "decided." Furthermore, "judgment (decision)" can be interpreted as "assuming," "expecting," "considering," etc.

[0152] In the present 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 "coupled" may also be interpreted in the same way as "different."

[0153] 10 shows an example of the configuration of a vehicle 2001. As shown in Fig. 10, the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, left and right front wheels 2007, left and right 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.

[0154] The drive unit 2002 is composed 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 operated by the user. The electronic control unit 2010 is composed of a microprocessor 2031, memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals from various sensors 2021 to 2027 provided in the vehicle are input to the electronic control unit 2010. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0155] The signals from the various sensors 2021 to 2028 include a current signal from a current sensor 2021 that senses the current of the motor, a rotation speed signal of the front and rear wheels obtained by a rotation speed sensor 2022, an air pressure signal of the front and rear wheels obtained by an air pressure sensor 2023, a vehicle speed signal obtained by a vehicle speed sensor 2024, an acceleration signal obtained by an acceleration sensor 2025, an accelerator pedal depression amount signal obtained by an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained by a brake pedal sensor 2026, a shift lever operation signal obtained by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028.

[0156] The information service unit 2012 is composed of various devices, such as a car navigation system, an audio system, speakers, a television, and a radio, for providing (outputting) various types of information, such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 2012 uses information acquired from external devices via the communication module 2013, etc., to provide various types of multimedia information and multimedia services to the occupants of the vehicle 1.

[0157] The information service unit 2012 may include input devices (e.g., keyboards, mice, microphones, switches, buttons, sensors, touch panels, etc.) that accept input from the outside, and may also include output devices (e.g., displays, speakers, LED lamps, touch panels, etc.) that output to the outside.

[0158] The driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driver's driving burden, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning locators (e.g., GNSS, etc.), map information (e.g., high-definition (HD) maps, autonomous vehicle (AV) maps, etc.), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, and AI processors, as well as one or more ECUs that control these devices. The driving assistance system unit 2030 also transmits and receives various information via the communication module 2013 to realize driving assistance functions or autonomous driving functions.

[0159] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 1 via the communication port. For example, the communication module 2013 transmits and receives data via the communication port 2033 to and from a driving unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, left and right front wheels 2007, left and right rear wheels 2008, an axle 2009, a microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 2028, which are provided in the vehicle 2001.

[0160] 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 an external device. For example, it transmits and receives various information to and from the external device 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, a mobile station, or the like.

[0161] The communication module 2013 may transmit at least one of signals from the above-mentioned various sensors 2021 to 2028 input to the electronic control unit 2010, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 2012 to an external device via wireless communication. The electronic control unit 2010, the various sensors 2021 to 2028, the information service unit 2012, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 2013 may include information based on the above-mentioned input.

[0162] The communication module 2013 receives various information (traffic information, traffic signal information, vehicle-to-vehicle information, etc.) transmitted from external devices and displays it on an information service unit 2012 provided in the vehicle. The information service unit 2012 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker 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 external devices 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, left and right front wheels 2007, left and right rear wheels 2008, axles 2009, sensors 2021 to 2028, and the like provided in the vehicle 2001.

[0163] 10 Wireless communication system 20 6GRAN 30 6GC 100 gNB 110 Wireless communication unit 120 RIS management unit 130 Network interface unit 140 Control unit 200 UE 300 RIS 310 RIS-MT unit 320 RIS-Panel unit 330 System information receiving unit 340 Control unit 1001 Processor 1002 Memory 1003 Storage 1004 Communication device 1005 Input device 1006 Output device 1007 Bus 2001 Vehicle 2002 Drive unit 2003 Steering unit 2004 Accelerator pedal 2005 Brake pedal 2006 Shift lever 2007 Left and right front wheels 2008 Left and right rear wheels 2009 Axle 2010 Electronic control unit 2012 Information service unit 2013 Communication module 2021 Current sensor 2022 RPM 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 Driving assistance system section 2031 Microprocessor 2032 Memory (ROM, RAM) 2033 Communication port

Claims

1. A radio base station comprising: a control unit that executes configuration in a radio resource control layer with a radio relay device equipped with a reflector; and a receiving unit that receives a setup completion message of the radio resource control layer from the radio relay device, wherein the receiving unit receives the setup completion message including identification information that identifies the radio relay device.

2. A radio base station comprising: a control unit that executes configuration in a radio resource control layer with a radio relay device equipped with a reflector; and a receiving unit that receives a setup request message of the radio resource control layer from the radio relay device, wherein the receiving unit receives the setup request message including identification information that identifies the radio relay device.

3. A radio base station comprising: a control unit that executes a random access procedure with a radio relay device equipped with a reflector; and a receiving unit that receives a random access channel from the radio relay device using radio resources dedicated to the radio relay device, wherein the control unit identifies the radio relay device based on the use of the radio resources.

4. The radio base station according to claim 3, further comprising a transmitting unit that transmits system information indicating the radio resources to the radio relay device.

5. A radio base station comprising: a control unit that executes configuration in a radio resource control layer with a radio relay device equipped with a reflector; and a transmission unit that transmits an initial message associated with the configuration to a network, wherein the transmission unit transmits the initial message including identification information that identifies the radio relay device.

6. A wireless communication method in a wireless base station, comprising: a step of performing configuration in a radio resource control layer with a wireless relay device equipped with a reflector; and a step of receiving a setup completion message of the radio resource control layer from the wireless relay device, wherein in the receiving step, the setup completion message includes identification information that identifies the wireless relay device.

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