Wireless communication node and wireless communication method

Abstract

To provide a wireless communication node and a wireless communication method capable of quickly and reliably providing Xn TNL Configuration Info to a BH RAN node.SOLUTION: A wireless communication node controls at least one of a connection in a wireless resource control layer and a handover between a wireless base station and another wireless communication node, with the wireless base station providing a wireless backhaul, and the wireless communication node transmits a handover message to the other wireless communication node, the handover message including configuration information related to a transport function of a network layer in the wireless base station.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to a wireless communication node and a wireless communication method that support Wireless Access Backhaul (WAB). [Background technology]

[0002] The 3rd Generation Partnership Project (3GPP: registered trademark) 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] In 3GPP Release-19, studies on Wireless Access Backhaul (WAB) are underway (Non-Patent Documents 1 and 2). For example, it has been agreed that WAB-gNB, which is a function equivalent to a radio base station (gNB) that can provide WAB functionality, will support the Xn interface between radio access network nodes (RAN nodes).

[0004] Also, 3GPP Release-18 specifies a mechanism for automatically establishing an Xn interface by RAN nodes exchanging TNL (Transport Network Layer) configuration information (Xn TNL Configuration Info) (Non-Patent Document 3). [Prior art documents] [Non-patent literature]

[0005] [Non-Patent Document 1] "New WID on additional topological enhancements for NR", RP-242395, 3GPP TSG RAN Meeting #105, 3GPP, September 2024 [Non-patent document 2] 3GPP TR 38.799 V0.0.1 (R3-243171), 3rd Generation Partnership Project; Technical Specification Group RAN; NR; Study on additional topological enhancements for NR (Release 19), 3GPP, March 2024 [Non-patent document 3] 3GPP TS 38.413 V18.4.0, 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NG-RAN; NG Application Protocol (NGAP) (Release 18), 3GPP, December 2024 Summary of the Invention [Problem to be solved by the invention]

[0006] Since the WAB-gNB may be mounted on a train, bus, or other vehicle and move, handover may be performed between RAN nodes (BH RAN nodes) that configure the wireless backhaul. In this case, the BH RAN node at the handover destination needs to recognize the Xn TNL Configuration Info of the WAB-gNB in ​​order to establish an Xn interface with the WAB-gNB.

[0007] However, since the Xn TNL Configuration Info is set by the OAM system that supports operation, management, and maintenance, it inevitably has a large delay. Therefore, when attempting to obtain the Xn TNL Configuration Info from the OAM side during handover of a moving WAB-gNB, the delay can become a problem, which may lead to handover failure.

[0008] Therefore, the following disclosure has been made in consideration of the above circumstances, and aims to provide a wireless communication node and a wireless communication method that can quickly and reliably provide Xn TNL Configuration Info to a BH RAN node. [Means for solving the problem]

[0009] One aspect of the present disclosure is a wireless communication node (BH RAN node 80) including a wireless base station (WAB node 150) that provides wireless backhaul, a control unit (control unit 87) that controls at least one of a connection in a radio resource control layer and a handover of the wireless base station with another wireless communication node, and a transmission unit (message processing unit 85) that transmits a handover message including configuration information related to a transport function of a network layer in the wireless base station to the other wireless communication node. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a diagram showing the overall schematic configuration of a wireless communication system 10. As shown in FIG. [Figure 2] FIG. 2 shows the basic architecture of a network based on WAB. [Figure 3] FIG. 3 is a functional block diagram of the BH RAN node 80. [Figure 4] FIG. 4 is a diagram showing an example of reconnection between a WAB node and a BH RAN node. [Figure 5]FIG. 5 is a diagram showing an example in which a WAB node resumes an RRC connection with a neighboring BH RAN node when the WAB-gNB and the neighboring BH RAN node are in an RRC INACTIVE state. [Figure 6] FIG. 6 is a diagram showing an example of a handover sequence between a WAB node and a BH RAN node. [Figure 7] FIG. 7 is a diagram showing an example of a sequence when a handover fails or a radio link fails between a WAB node and a BH RAN node. [Figure 8] FIG. 8 is a diagram showing an example of a sequence when a handover fails or a radio link fails between a WAB node and a BH RAN node when CHO or LTM is applied. [Figure 9] FIG. 9 is a diagram showing an example of a sequence in which the WAB-gNB and the BH RAN node resume an RRC connection in the RRC INACTIVE state. [Figure 10] FIG. 10 is a diagram illustrating an example of the hardware configuration of the BH RAN node 80, the gNB 100, the WAB node 150, and the UE 200. [Figure 11] FIG. 11 is a diagram showing an example of the configuration of a vehicle 2001. DETAILED DESCRIPTION OF THE INVENTION

[0011] 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.

[0012] (1) Overall configuration of wireless communication system 1 is a schematic diagram of the overall configuration of a wireless communication system 10 according to this embodiment. The wireless communication system 10 is a wireless communication system conforming to 5G New Radio (NR), and includes a Next Generation-Radio Access Network 20 (hereinafter, NG-RAN 20) and a terminal 200 (User Equipment 200, hereinafter, UE 200).

[0013] The wireless communication system 10 may be a wireless communication system conforming to a method called Beyond 5G, 5G Evolution, or 6G, or may include a wireless communication system conforming to a method called Long Term Evolution (LTE) or 4G. The wireless communication system 10 may support functions related to the Industrial Internet of Things (IIoT) and Ultra-Reliable and Low Latency Communications (URLLC).

[0014] The NG-RAN 20 includes a BH RAN node 80, a radio base station 100 (hereinafter, gNB 100), and a WAB node 150. Note that the specific configuration of the radio communication system 10, including the number of gNBs (which may be eNBs, etc.), BH RAN nodes, gNBs, WAB nodes, and UEs, is not limited to the example shown in FIG.

[0015] The gNB 100 may 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.

[0016] The WAB node 150 is a type of wireless communication node conforming to the Wireless Access Backhaul (WAB) standard. The WAB node 150 may provide a WAB. Specifically, the WAB node 150 may establish one or more links that constitute the WAB.

[0017] The NG-RAN 20 actually includes multiple NG-RAN nodes, specifically, gNBs (or ng-eNBs), and is connected to a 5G-compliant core network (5GC, not shown). The 5GC may include logical nodes that provide network functions (NFs: Network Functions). The NFs may include an Access and Mobility Management Function that provides access and mobility management functions for the UE 200, 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 the 5GC. In addition, a UDM / UDR (Unified Data Management / User Data Repository) may be connected to the AMF and / or SMF.

[0018] NG-RAN 20 and 5GC may simply be referred to as "networks." 5GC may introduce the concept of CUPS (Control and User Plane Separation), which clearly separates the functions of the user plane and the control plane.

[0019] The BH RAN node 80 is a RAN node that constitutes a wireless backhaul. The BH RAN node 80 may be connected to the WAB node 150 via an Xn interface. The BH RAN node 80 may also be connected to a 5GC that constitutes a wireless backhaul. In this embodiment, the BH RAN node 80 may constitute a wireless communication node.

[0020] The gNB100 is a radio base station conforming to NR, and performs radio communication conforming to NR with the UE200. The gNB100 may be configured to include 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 (such as an F1-AP). In this embodiment, the CU may be called a communication device or a central device. The DU may be called a distributed device.

[0021] The wireless communication system 10 may use a Neighbor Relation Table (NRT, which may also be called a Neighbor Cell Relation Table (NCRT)) that is applied to handover (HO) of the UE 200 to another cell and manages identification information (CGI: Cell Global Identifier) ​​of neighboring cells. The contents of the NRT may be manually set in advance, or an Automatic Neighbor Relation (ANR) function that automatically associates neighboring cell information (CGI) may be introduced.

[0022] Furthermore, the wireless communication system 10 may support a conditional handover (CHO). The CHO can execute a handover initiated by the UE 200 when a specific execution condition is met. If the CHO is not applicable, a normal handover (which may be called a CHO recovery) may be executed.

[0023] Furthermore, the wireless communication system 10 may support conditional addition or change (CPAC) of a Primary SCell (PSCell). A PSCell is a type of secondary cell. A PSCell means a Primary SCell (secondary cell), and may be interpreted as corresponding to any one of a plurality of SCells.

[0024] Figure 2 shows the basic architecture of a WAB-based network. Specifically, Figure 2 shows an example of the WAB architecture configuration when the NG traffic of a WAB-gNB is transmitted via a PDU session backhaul.

[0025] As shown in Fig. 2, WAB node 150 may be configured by a WAB-gNB that provides an interface with UE 200 and a WAB-MT that provides an interface with an upper node on the network side (e.g., gNB 100). UE 200 and AMF may be connected via an NG-C interface. UE 200 and WAB node 150 may be connected via an NR-Uu interface.

[0026] Furthermore, the WAB-gNB and the BH RAN node (BH RAN node 80) may be connected via an Xn interface as described above.

[0027] The gNB100 and UE200 are capable of supporting Massive MIMO, which generates more directional beams by controlling radio signals transmitted from multiple antenna elements, Carrier Aggregation (CA), which bundles and uses multiple component carriers (CCs), and Dual Connectivity (DC), which enables simultaneous communication between the UE and multiple NG-RAN nodes.

[0028] The type of DC may be Multi-RAT Dual Connectivity (MR-DC), which uses multiple radio access technologies, or NR-NR Dual Connectivity (NR-DC), which uses only NR. For example, one gNB may constitute a master node (MN), and one or more other gNBs may constitute secondary nodes (SNs).

[0029] In addition, the secondary node may be read as a secondary cell or a secondary cell group (SCG).

[0030] In this embodiment, the channels include a control channel and a data channel. The control channels include a physical downlink control channel (PDCCH), a physical uplink control channel (PUCCH), a physical random access channel (PRACH), and a physical broadcast channel (PBCH).

[0031] The data channels include a physical downlink shared channel (PDSCH) and a physical uplink shared channel (PUSCH).

[0032] 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.

[0033] Layer 1 may also be interpreted as including lower layers such as the physical layer. Layer 3 is a layer higher than Layer 1. The higher layers may include at least one of a radio link control layer (RLC), a packet data convergence protocol layer (PDCP), and a radio resource control layer (RRC), and a medium access control layer (MAC) may be positioned between the lower layer and the higher layer.

[0034] (2) Functional block configuration of wireless communication system Next, a description will be given of the functional block configuration of the wireless communication system 10. Specifically, a description will be given of the functional block configuration of the BH RAN node 80. FIG.

[0035] As shown in FIG. 3, the BH RAN node 80 includes a radio communication unit 81, a network IF unit 83, a message processing unit 85, and a control unit 87.

[0036] The wireless communication unit 81 transmits downlink signals (DL signals) conforming to NR. The wireless communication unit 81 also receives uplink signals (UL signals) conforming to NR. Specifically, the wireless communication unit 81 may transmit and receive wireless signals to and from the WAB node 150 (WAB-gNB).

[0037] The network IF unit 83 provides an interface for connecting to a radio access network node (RAN node) and a core network (5GC). Specifically, the network IF unit 83 may provide an Xn interface and an NG interface. The NG interface may be interpreted as an interface connecting the RAN node and the 5GC.

[0038] The message processor 85 executes processing related to transmission and reception of messages in a plurality of layers. In particular, in this embodiment, the message processor 85 may transmit and receive various messages in the radio resource control layer (RRC). These messages may include, for example, RRC Resume Request, RRC Resume, etc. Note that other messages, for example, RRC Reconfiguration, RRC Reconfiguration Complete, RRC Release, etc. may also be included.

[0039] The RRC Resume Request and RRC Resume may be interpreted as messages for resuming a suspended RRC connection. The RRC Resume Request and RRC Resume may also be used to resume an RRC connection with WAB node 150.

[0040] The message processing unit 85 may transmit a handover message including configuration information related to a transport function of the network layer in the WAB node 150 (WAB-gNB) to another wireless communication node. In this embodiment, the message processing unit 85 may constitute a transmitting unit. Specifically, the message processing unit 85 may transmit a handover request message (Handover request) including configuration information (Xn TNL Configuration Info) of the Transport Network Layer (TNL) to a target BH RAN node (another wireless communication node) that is the handover destination of the WAB-gNB.

[0041] Xn TNL Configuration Info is specified, for example, in 3GPP TS 38.423, Chapter 9.2.3.96. Xn TNL Configuration Info may be used to signal the IP address of a GTP (GPRS Tunneling Protocol)-U endpoint and the IP address of an IPSec endpoint used to establish an IPSec tunnel.

[0042] Furthermore, the message processor 85 may receive a radio resource control layer message including Xn TNL Configuration Info (setting information) from a mobile termination function (MT) configuring a wireless backhaul. In this embodiment, the message processor 85 may configure a receiver. Specifically, the message processor 85 may receive an RRC Reconfiguration Complete message including Xn TNL Configuration Info from the WAB-MT. Note that the RRC message may be another RRC message instead of the RRC Reconfiguration Complete.

[0043] The message processor 85 may transmit to the WAB-MT a radio resource control layer message including configuration information related to a transport function of a network layer in another wireless communication node. Specifically, the message processor 85 may transmit to the WAB-MT an RRC Reconfiguration including Xn TNL Configuration Info.

[0044] In this way, the message processor 85 may transmit Xn TNL Configuration Info to other wireless communication nodes such as the target BH RAN node upon re-establishment or resumption of RRC.

[0045] The control unit 87 controls each functional block constituting the BH RAN node 80. In particular, in this embodiment, the control unit 87 may control at least one of connection with the WAB node 150 (WAB-gNB) in a radio resource control layer and handover of the WAB node 150 with another wireless communication node.

[0046] Specifically, the control unit 87 may control transmission and reception of various messages in RRC via the message processing unit 85, and may execute RRC connection with the WAB-gNB, etc. The control unit 87 may also control handover (which may also be referred to as transition, cell selection, cell reselection, etc.) between BH RAN nodes of the WAB node 150.

[0047] (3) Operation of the wireless communication system Next, a description will be given of the operation of the wireless communication system 10. Specifically, a description will be given of the operation related to handover between BH RAN nodes of the WAB node 150 (WAB-gNB).

[0048] As shown in Fig. 2, an Xn interface can be set between the WAB-gNB and the BH RAN node. Since the WAB node 150 may move, it may need to switch the wireless communication node to which it is connected, such as by handover, between BH RAN nodes.

[0049] Figure 4 shows an example of reconnection between a WAB node and a BH RAN node. Figure 5 shows an example of RRC connection resumption between a WAB node and a BH RAN node. Specifically, Figure 4 shows an example of a WAB node reconnecting to a neighboring BH RAN node when the WAB-gNB experiences a handover failure or radio link failure (RLF). Figure 5 shows an example of a WAB node resuming an RRC connection with a neighboring BH RAN node when the WAB-gNB and the neighboring BH RAN node are in an RRC INACTIVE state.

[0050] The BH RAN node (another wireless communication node) at the handover destination needs to recognize the Xn TNL Configuration Info in order to configure the Xn interface with the WAB-gNB. This is because if the radio resources used for communication between the WAB-MT and the BH RAN node and the radio resources used for communication between the UE and the WAB-gNB use the same frequency band, resource coordination is required on the Xn interface to prevent interference.

[0051] In addition, in the event of a handover failure or RLF, the WAB node may reconnect to a neighboring BH RAN node. Even if the WAB-gNB and a neighboring BH RAN node are in the RRC INACTIVE state, the WAB node may resume an RRC connection with the neighboring BH RAN node.

[0052] Xn TNL Configuration Info is set by the OAM system that supports operation, management, and maintenance, but considering that WAB nodes move, setting Xn TNL Configuration Info by OAM causes a large delay, and setting Xn TNL Configuration Info with less delay is required. Below, we will explain an example of operation that can solve this problem.

[0053] It should be noted that the technical problems to be solved by the following operational examples are not limited to these technical problems, and other technical problems not mentioned can be clearly understood by a person having ordinary knowledge in the relevant technical field from the description of this embodiment.

[0054] Figure 6 shows an example of a handover sequence between a WAB node and a BH RAN node. As shown in Figure 6, the source BH RAN node recognizes the Xn TNL Configuration Info (hereinafter abbreviated as TNL Configuration Info), global RAN node ID, TAI (Tracking Area Identity), and NR CGI (Cell Global Identifier) ​​of the WAB-gNB of the subordinate WAB node, and therefore the source BH RAN node may notify the target BH RAN node of the TNL configuration info, global RAN node ID, TAI, and NR CGI of the WAB-gNB by a handover request message.

[0055] Furthermore, the source BH RAN node may transmit the UE type of the subordinate UE (i.e., an indicator indicating WAB-MT) and the ID of the WAB-MT to the target BH RAN node by a handover request message. In the case of CHO, the source BH RAN node may notify multiple target BH RAN nodes of the TNL configuration info, global RAN node ID, TAI, and NR CGI of the WAB-gNB by a handover request message. In the case of LTM, the source BH RAN node may notify multiple target BH RAN nodes of the TNL configuration info, global RAN node ID, TAI, and NR CGI of the WAB-gNB by an LTM request message.

[0056] Alternatively, the WAB-MT may notify the target BH RAN node of the TNL configuration info, global RAN node ID, TAI, and NR CGI of the WAB-gNB by using an RRC Reconfiguration Complete message sent by the WAB-MT to the target BH RAN node.

[0057] Furthermore, since the source BH RAN node recognizes the TNL configuration info, global RAN node ID, TAI, and NR CGI of the target BH-gNB, the source BH RAN node may notify the WAB-MT of the TNL configuration info, global RAN node ID, TAI, and NR CGI of the target BH-gNB by an HO command (RRC Reconfiguration).Within the WAB node, the WAB-MT may notify the WAB-gNB of the TNL configuration info, global RAN node ID, TAI, and NR CGI of the target BH-gNB.

[0058] In addition to the above-mentioned handover, CHO, and LTM, during CHO fast failure recovery or LTM fast failure recovery, in a cell where a WAB-MT has successfully performed fast failure recovery, the WAB-gNB co-located with the WAB-MT can quickly set up an Xn interface with the target BH RAN node.

[0059] 7 shows an example of a sequence when a handover fails or a radio link fails between a WAB node and a BH RAN node. As shown in FIG. 7, in the case of reconnection in RRC, the WAB-MT may send an RRC Reestablishment Request including a WAB-MT ID and a UE type (i.e., an indicator indicating the WAB-MT) to a new BH RAN node.

[0060] A Retrieve UE context request message sent from the new BH RAN node to the old BH RAN node may include a WAB-MT context ID to request TNL configuration information of the WAB-gNB. A Retrieve UE context response message returned from the old BH RAN node to the new BH RAN node may include the TNL configuration information of the WAB-gNB, the global RAN node ID, the TAI, the NR CGI, the UE type (i.e., an indicator indicating a WAB-MT), and the ID of the WAB-MT.

[0061] The RRC Reestablishment message sent from the new BH RAN node to the WAB-MT may include the TNL configuration info, global RAN node ID, TAI, and NR CGI of the new BH-gNB. Alternatively, the TNL configuration info, global RAN node ID, TAI, and NR CGI of the WAB-gNB may be notified to the target BH RAN node by an RRC Reestablishment Request or RRC Reestablishment Complete message sent from the WAB-MT to the target BH RAN node.

[0062] Figure 8 shows an example of a sequence when a handover fails or a radio link fails between a WAB node and a BH RAN node when CHO or LTM is applied. As shown in Figure 8, even in CHO or LTM, information such as TNL configuration info may be included in the RRC Reconfiguration and RRC Reconfiguration Complete. In the case of CHO or LTM, the source BH RAN node may notify the WAB-MT of information such as TNL configuration info, global RAN node ID, TAI, and NR CGI of multiple target BH-gNBs by using an RRC Reconfiguration message.

[0063] 9 shows an example of a sequence in which the WAB-gNB and the BH RAN node resume the RRC connection in the RRC INACTIVE state. As shown in FIG. 9, in the case of RRC Resume, an RRC Resume Request including the WAB-MT ID and the UE type (i.e., an indicator indicating the WAB-MT) may be transmitted from the WAB-MT to the new BH RAN node.

[0064] A Retrieve UE context request message sent from the new BH RAN node to the old BH RAN node may include a WAB-MT context ID and request TNL configuration information of the WAB-gNB. A Retrieve UE context response message returned from the old BH RAN node to the new BH RAN node may include the TNL configuration information of the WAB-gNB, the global RAN node ID, the TAI, the NR CGI, the UE type (i.e., an indicator indicating a WAB-MT), and the ID of the WAB-MT.

[0065] The RRC Resume message transmitted from the new BH RAN node to the WAB-MT may include the TNL configuration info, global RAN node ID, TAI, and NR CGI of the new BH-gNB. Alternatively, the TNL configuration info, global RAN node ID, TAI, and NR CGI of the WAB-gNB may be notified to the target BH RAN node by an RRC Resume Request message or an RRC Resume Complete message transmitted from the WAB-MT to the target BH RAN node.

[0066] According to the above-described operation example, since the Xn TNL Configuration Info can be included in the handover or RRC message, the Xn TNL Configuration Info can be provided to the BH RAN node more quickly and reliably than when the Xn TNL Configuration Info is obtained from the OAM side. This enables the Xn interface to be quickly set up between the WAB-gNB and the target BH-gNB (BH RAN node).

[0067] (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.

[0068] For example, the above-described operational example assumes WAB, but WAB can be a tentative name, and similar operations may be applied to network architectures other than WAB (e.g., IAB) as long as they utilize wireless backhaul (and wireless access).

[0069] 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.

[0070] Furthermore, specific, dedicated, UE-specific, and UE-dedicated may be interchangeable. Similarly, common, shared, group-common, UE-common, and UE-shared may be interchangeable.

[0071] The block diagram (FIG. 3) used in the description of the above-described embodiment shows 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 connected directly or indirectly (for example, by wire, wirelessly, etc.) and these multiple devices. The functional block may also be realized by combining the single device or multiple devices with software.

[0072] Functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, 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.

[0073] Furthermore, the above-described BH RAN node 80, gNB 100, WAB node 150, and UE 200 (the devices) may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 10 is a diagram showing an example of the hardware configuration of the devices. As shown in Fig. 10, the devices may be configured as a computer including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0074] 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.

[0075] Each functional block of the device (see FIG. 3) is realized by any hardware element of the computer device or a combination of the hardware elements.

[0076] 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.

[0077] 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, a register, and the like.

[0078] 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-mentioned embodiments. Furthermore, the various processes described above may be executed by one 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.

[0079] The memory 1002 is a computer-readable recording medium and may be configured by, for example, at least one of 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 can store a program (program code), a software module, etc., that can execute a method according to an embodiment of the present disclosure.

[0080] 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 appropriate medium including at least one of memory 1002 and storage 1003.

[0081] 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.

[0082] 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).

[0083] The input device 1005 is an input device (for example, 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 (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0084] Furthermore, each device such as the processor 1001 and the memory 1002 is connected to 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.

[0085] 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.

[0086] 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.

[0087] 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 systems, and next-generation systems enhanced based on these. In addition, a combination of multiple systems (for example, a combination of at least one of LTE and LTE-A with 5G) may be applied.

[0088] 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.

[0089] 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 (for example, an MME or an 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 (for example, an MME and an S-GW) may also be used.

[0090] 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 / output via multiple network nodes.

[0091] The input and output information may be stored in a specific location (for example, memory) or may be managed using a management table. The input and output information may be overwritten, updated, or added to. The output information may be deleted. The input information may be sent to another device.

[0092] 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).

[0093] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, notification of predetermined information (e.g., notification that "X is true") is not limited to being done explicitly, but may be done implicitly (e.g., by not notifying the predetermined information).

[0094] 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.

[0095] 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.

[0096] 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.

[0097] Note that terms explained 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.

[0098] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0099] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values ​​from a predetermined value, or other corresponding information. For example, a radio resource may be indicated by an index.

[0100] 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.

[0101] 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.

[0102] 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)).

[0103] 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.

[0104] 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.

[0105] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0106] 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.

[0107] 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 be a device mounted on a mobile object, or the mobile object itself. The mobile object 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 also 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 Internet of Things (IoT) device such as a sensor.

[0108] Furthermore, a base station in the present disclosure may be interpreted 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 interpreted as terms corresponding to communication between terminals (for example, "side"). For example, terms such as an uplink channel and a downlink channel may be interpreted as a side channel (or side link).

[0109] 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.

[0110] 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.

[0111] Numerology may be a communication parameter applied to at least one of transmission and 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 a transceiver in the frequency domain, and specific windowing operations performed by a transceiver in the time domain.

[0112] 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.

[0113] 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.

[0114] 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.

[0115] For example, one subframe may be called a transmission time interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called 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.

[0116] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. However, the definition of TTI is not limited to this.

[0117] 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.

[0118] 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. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0119] A TTI having a time length of 1 ms may be called 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 called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0120] 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.

[0121] A resource block (RB) is a resource allocation unit in the time domain and 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 also be determined based on numerology.

[0122] The time domain of an RB may include one or more symbols and may be one slot, one minislot, one subframe, or one TTI in length. Each TTI, subframe, etc. may be composed of one or more resource blocks.

[0123] 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, or the like.

[0124] 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.

[0125] 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.

[0126] 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.

[0127] 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."

[0128] 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 can be changed in various ways.

[0129] 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.

[0130] The reference signal may also be abbreviated as Reference Signal (RS), and may also be called a pilot depending on the applicable standard.

[0131] 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."

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

[0133] 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.

[0134] When used in this disclosure, the terms "include," "including," and variations thereof are intended to be inclusive, similar to the term "comprising." Furthermore, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0135] 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.

[0136] 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.

[0137] 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."

[0138] Fig. 11 shows an example of the configuration of a vehicle 2001. As shown in Fig. 11, 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.

[0139] 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, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals are input to the electronic control unit 2010 from various sensors 2021 to 2027 provided in the vehicle. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0140] 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.

[0141] 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 provides various types of multimedia information and multimedia services to the occupants of the vehicle 1 by using information acquired from external devices via the communication module 2013, etc.

[0142] 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.

[0143] 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.

[0144] 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 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, 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.

[0145] 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.

[0146] The communication module 2013 may transmit at least one of signals from the above-mentioned various sensors 2021-2028 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 2021-2028, 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.

[0147] 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 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.

[0148] (Addendum) The above disclosure may be expressed as follows: A first feature may be a wireless communication node including: a radio base station that provides a wireless backhaul; a controller that controls at least one of a connection in a radio resource control layer and a handover of the radio base station with another wireless communication node; and a transmitter that transmits a handover message to the other wireless communication node, the handover message including configuration information related to a transport function of a network layer in the radio base station.

[0149] A second feature, in the first feature, may further include a receiving unit that receives a message of the radio resource control layer including the configuration information from a mobile termination function that configures the radio backhaul.

[0150] A third feature is that in the first or second feature, the transmitter may transmit, to a mobile termination function configuring the wireless backhaul, a message of the radio resource control layer including configuration information related to a transport function of a network layer in the other wireless communication node.

[0151] As a fourth feature, in any one of the first to third features, the transmission unit may transmit the configuration information to the other wireless communication node in re-establishment or resumption in the radio resource control layer. [Explanation of symbols]

[0152] 10. Wireless communication systems 20 NG-RAN 80 BH RAN nodes 81 Radio Communication Department 83 Network Interface Department 85 Message processing section 87 Control Unit 100 gNB 150 WAB nodes 200 UE 1001 processor 1002 memory 1003 Storage 1004 Communication equipment 1005 Input Device 1006 Output Device 1007 Bus 2001 Vehicle 2002 Drive unit 2003 Steering Section 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 Services Department 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 Systems Department 2031 microprocessor 2032 memory (ROM, RAM) 2033 communication port

Claims

1. a radio base station that provides a radio backhaul; and a control unit that controls at least one of a connection in a radio resource control layer and a handover of the radio base station with another radio communication node; a transmitter that transmits a handover message including setting information related to a transport function of a network layer in the radio base station to the other radio communication node; A wireless communication node comprising:

2. The wireless communication node according to claim 1 , further comprising: a receiving unit that receives a message of the radio resource control layer including the configuration information from a mobile termination function that configures the wireless backhaul.

3. 2. The wireless communication node according to claim 1, wherein the transmitter transmits to a mobile termination function constituting the wireless backhaul a message of the radio resource control layer including configuration information related to a transport function of a network layer in the other wireless communication node.

4. The wireless communication node according to claim 1 , wherein the transmission unit transmits the setting information to the other wireless communication node upon re-establishment or resumption in the radio resource control layer.

5. a step of controlling a radio base station providing a radio backhaul, and at least one of a connection in a radio resource control layer and a handover of the radio base station with another radio communication node; transmitting a handover message to the other wireless communication node, the handover message including configuration information related to a transport function of a network layer in the wireless base station; A wireless communication method in a wireless communication node, comprising:

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