Wireless communication node and wireless communication method

Abstract

The wireless communication node (100A) acquires setting information of the wireless resource facing the child node in the IAB node. The setting information includes setting information 1 including information of the wireless resource transmitted by the network to the IAB node, and setting information 2 including information of the wireless resource treated as the wireless resource always able to be used as the wireless resource facing the second wireless node.

Description

TECHNICAL FIELD

[0001] The present application relates to a wireless communication node that sets wireless access and wireless backhaul. BACKGROUND

[0002] In the 3rd Generation Partnership Project (3GPP), Long Term Evolution (LTE) is being standardized, LTE-Advanced (hereinafter, LTE including LTE-Advanced will be referred to as LTE) is being standardized for the purpose of further high speed of LTE, and a system called 5G New Radio (NR) or Next Generation (NG) or the like, which is a subsequent system of LTE, is being standardized.

[0003] For example, in a Radio Access Network (RAN) of NR, Integrated Access and Backhaul (IAB) that integrates wireless access toward a User Equipment (UE) and wireless backhaul between wireless communication nodes such as a wireless base station (gNB) is being studied.

[0004] In IAB, an IAB node has a function as a Mobile Termination (MT) for connection with a parent node, and a function as a Distributed Unit (DU) for connection with a child node or a UE.

[0005] Further, in IAB, although there is a restriction of half duplex communication, wireless resources based on Time Division Multiplexing (TDM), Frequency Division Multiplexing (FDM), and Spatial Division Multiplexing (SDM) are available through wireless access and wireless backhaul. Among them, from the viewpoint of the DU, Downlink (DL), Uplink (UL), and Flexible time-resource (D / U / F) are classified into any one of "Hard", "Soft", or "Not Available" (H / S / NA).

[0006] Specifically, "Hard" means that the corresponding time resource is always available as a radio resource for a DU child link connected to a child node or a UE, and "Soft" means that whether the corresponding time resource is available as a radio resource (DU resource) for a DU child link is explicitly or implicitly controlled by the parent node.

[0007] In 3GPP, a control method of a radio resource oriented to an MT and a DU as a half-duplex communication is being discussed (see Non-Patent Literature 1).

[0008] As a result of the discussion, it was agreed that the parent node does not need to directly recognize allocation information of a cell-specific signal or channel (for example, PRACH (Physical Random Access Channel) and SS / PBCH Block (SSB), etc.) for a DU of an IAB node (Non-Patent Literature 2). Further, it was also agreed that, in the case where a cell-specific signal or channel is set for a DU of an IAB node, the IAB node treats a radio resource used in the setting of the cell-specific signal or channel as "Hard" (Hard DU resource).

[0009] Prior Art Documents

[0010] Non-Patent Literature

[0011] Non-Patent Literature 1: "Summary of 7.2.3.3 Mechanisms for resource multiplexing among backhaul and access links", R1-1905739, 3GPP TSG RAN WG1 Meeting #96bis, 3GPP, April 2019

[0012] Non-Patent Literature 2: "RAN1 Chairman's Notes", 3GPP TSG RAN WG1 Meeting #97, 3GPP, May 2019 SUMMARY

[0013] As described above, although the parent node does not need to directly recognize allocation information of a cell-specific signal or channel for a DU of an IAB node, the IAB node treats a radio resource used in the setting of a cell-specific signal or channel for a DU of the node as a Hard DU resource.

[0014] In view of this, from the viewpoint of appropriate allocation of wireless resources that can be shared between the wireless communication nodes, it is preferable that the parent node be able to recognize information of wireless resources that are treated as Hard DU resources in the IAB node.

[0015] Thus, the present application was achieved in view of the above-described circumstances, and aims to provide a wireless communication node and a wireless communication method that can more appropriately achieve allocation of wireless resources when an Integrated Access and Backhaul (IAB) configuration is provided.

[0016] According to one embodiment of the present disclosure, a wireless communication node is provided, in which a first wireless link (Link_parent) between the wireless communication node (wireless communication node 100A) and a first wireless node (IAB node) and a second wireless link (Link_child) between the first wireless node and a second wireless node (child node) are set, and the wireless communication node has a control section that acquires setting information of wireless resources facing the second wireless node in the first wireless node. The setting information includes first setting information including information of the wireless resources transmitted by a network to the first wireless node, and second setting information including information of wireless resources treated as wireless resources that can be used as the wireless resources facing the second wireless node at all times.

[0017] According to one embodiment of the present disclosure, a wireless communication method is provided, which includes the steps of setting a first wireless link between a wireless communication node and a first wireless node and a second wireless link between the first wireless node and a second wireless node, and acquiring setting information of wireless resources facing the second wireless node in the first wireless node. The setting information includes first setting information including information of the wireless resources transmitted by a network to the first wireless node, and second setting information including information of wireless resources treated as wireless resources that can be used as the wireless resources facing the second wireless node at all times.

[0018] According to one embodiment of the present disclosure, a wireless communication node is provided, in which the wireless communication node has a mobile terminal facing an IAB donor node, a distribution unit facing an IAB node, and a control section that acquires setting information of wireless resources facing the distribution unit, and the control section processes as a usable hard resource even if it is set as a soft resource or an unusable resource according to the setting information indicating whether the distribution unit can be used or not, in a case where a signal or a channel dedicated to a cell in the distribution unit is allocated.

[0019] According to one embodiment of the present disclosure, there is provided a wireless communication method, wherein the wireless communication method includes: acquiring setting information of a wireless resource of a distribution unit facing an IAB node; and in a case where a cell-specific signal or channel in the distribution unit is allocated, even if it is set as a soft resource indicating whether the distribution unit is available or a resource that is not available according to the setting information, it is processed as a hard resource that is available. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a whole schematic configuration diagram of a wireless communication system 10.

[0021] Figure 2 is a diagram showing a basic structure example of an IAB.

[0022] Figure 3 is a functional block configuration diagram of the wireless communication node 100A.

[0023] Figure 4 is a functional block configuration diagram of the CU 50.

[0024] Figure 5 is a diagram showing an allocation example of an MT, DU resource by a parent node and an IAB node.

[0025] Figure 6 is a diagram showing an allocation action timing for a DU resource of an IAB node.

[0026] Figure 7 is a diagram showing a signaling example of setting information 1 (Semi-static DU resource).

[0027] Figure 8 is a diagram showing a signaling example of setting information 2 (Treated as DU H resource).

[0028] Figure 9 is a diagram showing an example of a hardware structure of the CU 50 and the wireless communication nodes 100A to 100C. DETAILED DESCRIPTION

[0029] Hereinafter, an embodiment will be described based on the drawings. In addition, the same or similar functions, structures are given the same or similar reference numerals, and the description thereof is appropriately omitted.

[0030] (1) Whole Schematic Configuration of Wireless Communication System

[0031] Figure 1is a whole schematic configuration diagram of a wireless communication system 10 to which the present embodiment pertains. The wireless communication system 10 is a wireless communication system in accordance with 5G New Radio (NR), and is constituted by a plurality of wireless communication nodes and user terminals.

[0032] Specifically, the wireless communication system 10 includes wireless communication nodes 100A, 100B, 100C, and a user terminal 200 (hereinafter, referred to as UE 200).

[0033] The wireless communication nodes 100A, 100B, 100C are capable of setting wireless access with the UE 200, and wireless backhaul between the wireless communication nodes. Specifically, a backhaul (transmission path) based on a wireless link is set between the wireless communication node 100A and the wireless communication node 100B, and between the wireless communication node 100A and the wireless communication node 100C.

[0034] Thereby, a structure that integrates wireless access with the UE 200 and wireless backhaul between the wireless communication nodes is referred to as Integrated Access and Backhaul (IAB).

[0035] The IAB reuses existing functions and interfaces defined for the purpose of wireless access. In particular, Mobile-Termination (MT), gNB-DU (Distributed Unit), gNB-CU (Central Unit), User Plane Function (UPF), Access and Mobility Management Function (AMF) and Session Management Function (SMF), and corresponding interfaces, such as NR Uu (between MT and gNB / DU), Fl, NG, X2, and N4 are used as a baseline.

[0036] The wireless communication node 100A is connected with a wireless access network (NG-RAN) and a core network (Next Generation Core (NGC) or 5GC) of NR via a wired transmission path such as a fiber transmission. The NG-RAN / NGC includes a Central Unit (CU) 50 (hereinafter, referred to as CU 50) as a communication node. In addition, it can be simply described as "network" including the NG-RAN and the NGC.

[0037] Further, the CU 50 can be constituted by any one or a combination of the above-described UPF, AMF, and SMF. Alternatively, the CU 50 can be such a gNB-CU as described above.

[0038] Figure 2 is a diagram illustrating an example of a basic structure of IAB. As shown in Figure 2 , in the present embodiment, the wireless communication node 100A constitutes a parent node in IAB, and the wireless communication node 100B (and the wireless communication node 100C) constitutes an IAB node (a first wireless node) in IAB. Further, the parent node can be referred to as an IAB donor.

[0039] A child node (a second wireless node) in IAB is constituted by another wireless communication node not illustrated in Figure 1 . Alternatively, the UE 200 can also constitute the child node.

[0040] A wireless link (a first wireless link) is set between the parent node and the IAB node. Specifically, a wireless link referred to as Link_parent is set.

[0041] A wireless link (a second wireless link) is set between the IAB node and the child node. Specifically, a wireless link referred to as Link_child is set.

[0042] Such a wireless link set between the wireless communication nodes is referred to as a wireless backhaul (BH). The Link_parent is constituted by a downlink direction "DL parent BH" and an uplink direction "UL parent BH". The Link_child is constituted by a downlink direction "DL child BH" and an uplink direction "UL child BH".

[0043] Further, a wireless link set between the UE 200 and the IAB node or the parent node is referred to as an access link (AC).

[0044] The IAB node has a function as a mobile termination (MT) for connection with the parent node and a function as a distributed unit (DU) for connection with the child node (or the UE 200). Further, although omitted in Figure 2 , the parent node and the child node also have the MT and the DU.

[0045] The radio resources used by the DU are classified into any of "Hard", "Soft", or "Not Available" (H / S / NA). In addition, available or not available is specified within "Soft (S)".

[0046] In addition, Figure 2 The illustrated example of the structure of the IAB utilizes the CU / DU split, but the structure of the IAB is not necessarily limited to this structure. For example, in the wireless backhaul, the IAB can be configured by a tunnel using the GPRS Tunneling Protocol (GTP)-U / User Datagram Protocol (UDP) / Internet Protocol (IP).

[0047] As a main advantage of such an IAB, it can be cited that it is possible to flexibly and densely configure NR cells without densifying the transport network. The IAB can be applied to various scenarios such as the configuration of small cells outdoors, support indoors, and mobile relay devices (e.g., inside buses and trains).

[0048] For the radio resources used in the wireless access and the wireless backhaul, although there is a restriction of half duplex communication, it is also possible to utilize time division multiplexing (TDM), frequency division multiplexing (FDM), and space division multiplexing (SDM). However, the radio resources are not necessarily limited to half duplex communication, and if other conditions are satisfied, it can also be full duplex communication.

[0049] In addition, as illustrated in Figure 1 and Figure 2 The IAB can support deployment based on NR only standalone (SA) or deployment based on non-standalone (NSA) including other RATs (LTE, etc.).

[0050] (2) Functional block structure of the wireless communication system

[0051] Next, the functional block structure of the wireless communication node 100A that constitutes the wireless communication system 10 and the CU 50 included in the NGC will be described.

[0052] (2.1) Wireless communication node 100A

[0053] Figure 3 is a functional block diagram of the wireless communication node 100A that constitutes the parent node. As illustrated in Figure 3 The wireless communication node 100A has a radio transmission section 110, a radio reception section 120, a NW IF section 130, a resource information holding section 140, and a control section 150.

[0054] The wireless transmitting section 110 transmits a wireless signal in accordance with the 5G specification. Further, the wireless receiving section 120 receives a wireless signal in accordance with the 5G specification. In the present embodiment, the wireless transmitting section 110 and the wireless receiving section 120 perform wireless communication with the wireless communication node 100B that constitutes an IAB node.

[0055] In the present embodiment, the wireless communication node 100A has the functions of an MT and a DU, and the wireless transmitting section 110 and the wireless receiving section 120 each correspond to the MT / DU to transmit and receive a wireless signal.

[0056] The NW IF section 130 provides a communication interface that realizes connection with the NGC side or the like. For example, the NW IF section 130 can include interfaces such as X2, Xn, N2, N3, and the like.

[0057] The resource information holding section 140 holds information on wireless resources allocated to the parent node and the IAB node. Specifically, it is preferable that the resource information holding section 140 hold the following setting information at least for the DU-oriented wireless resources (DU resources) of the IAB node.

[0058] • DU resources (specifically, the kind of H / S / NA)

[0059] • Allocation information of the cell-specific signal or channel in the IAB node shown below

[0060] (i) SS / PBCH Block (SSB) transmissions: SS / PBCH block transmission

[0061] (ii) Broadcast system information: Broadcast system information

[0062] (iii) Configured periodic CSI-RS (Channel State Information Reference Signal): Configured periodic CSI-RS (Channel State Information Reference Signal)

[0063] (iv) PRACH (Physical Random Access Channel) resources: Physical random access channel resources

[0064] (v) Resources for scheduling requests: Resources for scheduling requests

[0065] Since the setting information of the IAB node including the allocation information of (i) to (v) is selected in the IAB node, the parent node acquires the setting information in the IAB node. In addition, although it is preferable that the resource information holding section 140 acquires all the allocation information of (i) to (v), it is also possible not to acquire a part of the information, and in a case where it is possible to be replaced by other information, it is also possible to be replaced by the other information.

[0066] The SS / PBCH block (SSB) is a synchronization signal / broadcast channel block constituted by the SS, the PBCH, and is mainly periodically transmitted for the terminal to perform cell ID and / or reception timing detection at the start of communication. In 5G (NR), it is also applied to reception quality measurement of each cell.

[0067] The broadcast system information can be an arbitrary SIB (System Information Block), and can also be a specific SIB. Alternatively, it can also be broadcast information other than the SIB.

[0068] The CSI is information indicating the state of a wireless channel through which a signal passes, and the CSI-RS is a reference signal used in acquisition of the information.

[0069] The PRACH is a physical channel for the UE 200 to initially transmit in the random access procedure. The scheduling request (SR) is a signal in which the user requests the wireless base station (including the IAB node) for allocation of the uplink wireless resource.

[0070] The control section 150 performs control of each functional block constituting the wireless communication node 100A. In particular, in the present embodiment, the control section 150 acquires the setting of the wireless resource of the IAB node (first wireless node) facing the child node (second wireless node).

[0071] Specifically, the control section 150 can acquire the setting information (as described above) indicating the setting of the wireless resource from the IAB node. Alternatively, the control section 150 can acquire the setting information indicating the setting of the wireless resource from the network (specifically, from the CU 50).

[0072] Thus, the wireless communication node 100A (parent node) can acquire the setting information indicating the setting of the DU resource of the IAB node, and cause the resource information holding section 140 to hold the setting information.

[0073] Thus, it is preferable that the setting information acquired by the control section 150 includes at least the following information. Specifically, the setting information can include DU resources (H / S / NA) semi-statically indicated by the CU 50 to the IAB node. In the present embodiment, such setting information can be referred to as setting information 1 (may also be referred to as first setting information) for convenience of explanation. That is, the setting information 1 is information of wireless resources transmitted by the network to the IAB node (first wireless node).

[0074] Further, the setting information can also include wireless resources (referred to as Hard DU resources) that are treated as "Hard" in the IAB node to which a cell specific signal / channel in the IAB node is allocated. In the present embodiment, such setting information is referred to as setting information 2 (may also be referred to as second setting information). That is, the setting information 2 is information of wireless resources treated as "wireless resources that can always be used as wireless resources for a child node (second wireless node)".

[0075] In addition, the cell in the IAB node simply refers to a cell formed by the IAB node (wireless communication node 100B), but can also refer to one or a plurality of component carriers (CCs), bandwidth parts (BWPs), or beams, etc. used in the cell.

[0076] The control section 150 can acquire the setting information 1 and the setting information 2 by signaling from the CU 50 or the IAB node (wireless communication node 100B) described later.

[0077] However, the control section 150 can also acquire the setting information 1 and the setting information 2 explicitly or implicitly by a method different from such signaling from the CU 50 or the IAB node. That is, the control section 150 can recognize the setting information 1 and the setting information 2 by signaling or other explicit or implicit methods.

[0078] For the setting information 1 and the setting information 2, since the period and timing of notification can be different, different notification methods can be used respectively. That is, the setting information 1 and the setting information 2 can be notified to the parent node by different signaling structures.

[0079] For example, for the setting information 1, it can be notified in a radio frame, a subframe, or a slot (refer to FIG. 6A). Figure 7) the mode of the radio resources (specifically, the mode of H / S / NA) in units of radio frames, subframes, or slots. That is, the setting information 1 can contain information indicating the type (H / S / NA) of the radio resources (DU resources) facing the child node in the IAB node in units of radio frames, subframes, or slots.

[0080] Further, for the setting information 2, the mode of the Hard DU resource on the radio frame, subframe, or slot, the transmission period of the Hard DU resource, and information indicating the offset of the position of the Hard DU resource in the time direction can be notified. That is, the setting information 2 can contain information indicating the position of the Hard DU resource on the radio frame, subframe, or slot.

[0081] In addition, as described above, the Hard DU resource refers to a radio resource that is treated as a radio resource that can always be used ("Hard") by being allocated a signal or channel (SSB, RACH, or the like) that is specific to a cell in the IAB node.

[0082] Further, the control section 150 can overwrite the setting information 1 by the setting information 2. The overwrite refers to a case where, when the setting information 1 is held in the resource information holding section 140, the setting information 2 is acquired (recognized), the setting information 2 can be made to be used in preference to the setting information 1, the setting information 1 can be deleted, or the setting information 1 can be made unusable, or the like. That is, the control section 150 makes the setting information 2 to be used in preference to the setting information 1.

[0083] (2.2) CU 50

[0084] Figure 4 is a functional block configuration diagram of the CU 50. As shown in Figure 4 , the CU 50 has a NW IF section 51, an information transmission section 53, a resource information holding section 55, and a control section 57.

[0085] The NW IF section 51 provides a communication interface that realizes connection with the wireless communication node 100A or the like. For example, the NW IF section 51 can contain an N2, N3, or the like interface.

[0086] The information transmission section 53 transmits information of the radio resources allocated to the parent node and the IAB node according to an instruction from the control section 57. Specifically, the information transmission section 53 transmits allocation information of the MT, DU resources allocated to the wireless communication node 100A constituting the parent node toward the wireless communication node 100A.

[0087] Further, the information transmitting section 53 transmits the allocation information of the MT, DU resources allocated to the wireless communication node 100B constituting the IAB node toward the wireless communication node 100B.

[0088] Further, the information transmitting section 53 can transmit the setting information of the wireless resources toward the child node in the IAB node described above (specifically, the setting information 1 and the setting information 2) to the parent node.

[0089] The resource information retaining section 55 retains the allocation information of the MT, DU resources transmitted by the information transmitting section 53. Specifically, the resource information retaining section 55 retains the allocation information of the MT, DU resources allocated to the parent node and the IAB node. Further, the retained allocation information can be appropriately updated.

[0090] The control section 57 performs control of each functional block constituting the CU 50. In particular, in the present embodiment, the control section 57 performs control relating to the wireless resources allocated to the parent node and the IAB node.

[0091] Specifically, the control section 57 controls the MT, DU resources allocated to the parent node and the IAB node, and causes the allocation information of the MT, DU resources to be transmitted through the information transmitting section 53.

[0092] (3) Operation of the wireless communication system

[0093] Next, the operation of the wireless communication system 10 will be described. Specifically, the operation relating to the allocation of the MT, DU resources and the notification of the setting information of the wireless resources performed by the parent node and the IAB node will be described.

[0094] (3.1) Example of the allocation of the MT, DU resources by the parent node and the IAB node

[0095] Figure 5 An example of the allocation of the MT, DU resources by the parent node and the IAB node will be described. In the present embodiment, the parent node and the IAB node are assumed to be the wireless communication node 100A and the wireless communication node 100B, respectively. Figure 5 In the present embodiment, the Link_parent is set between the parent node (the wireless communication node 100A) and the IAB node (the wireless communication node 100B), and the Link_child (may also be referred to as the DU child link) is set between the IAB node and the child node.

[0096] Specifically, the Link_parent is set between the DU of the parent node and the MT of the IAB node. Further, the Link_child is set between the DU of the IAB node and the MT (not shown) of the child node.

[0097] As described above, the DU resource is classified as H / S / NA, and in addition, "Soft" is set as available or not available.

[0098] In Figure 5 In the table, "yes" or "no" shows whether or not the MT and the DU of the IAB node are allocated the wireless resource that can be used as a signal or a channel specific to a cell.

[0099] Further, "IAB decides" means that the selection of Link_parent or Link_child is delegated to the IAB node to judge. "Available" means that the IAB node can select the wireless resource based on the notification of the DU resource from the parent node (control unit 150) and the allocation of the signal or the channel specific to a cell.

[0100] As described above, in the case where the allocated wireless resource is judged only by H / S / NA / D / U / F, even if the parent node allocates the wireless resource to the DU of the parent node, the IAB node can not select the link (Link_parent) with the parent node (region A in the drawing). This DU resource is eventually wasted since it is not used by any process, and there is room for improvement from the viewpoint of the efficiency of the use of the wireless resource.

[0101] In the present embodiment, the allocation of the DU resource that can eliminate such a state is realized. In addition, in the 3GPP, the following is agreed.

[0102] • The core network (CU 50) sets H / S / NA to the DU resource of the IAB node.

[0103] • The parent node instructs the availability of the soft DU resource of the IAB node.

[0104] • In the case where the DU resource of the IAB node is set to "Hard" / "Soft (available)", but there is a signal or a channel specific to a cell allocated to the MT, either the DU or the MT is selected by the IAB node whether or not to use.

[0105] • The parent node has a function of grasping all or a part of the setting (H / S / NA / D / U / F) of the DU resource of the IAB node.

[0106] • The parent node does not need to directly recognize allocation information of a cell specific signal / channel for the DU of the IAB node.

[0107] • The IAB node handles the radio resources used in the setting of the cell specific signal / channel as "Hard" (Hard DU resource).

[0108] (3.2) Radio resource allocation action

[0109] Next, an example of the allocation action of the DU resource for the IAB node will be described. Figure 6 An allocation action timing of the DU resource for the IAB node is shown.

[0110] As shown in Figure 6 , the CU 50 allocates radio resources to the parent node (wireless communication node 100A, hereinafter the same) and the IAB node (wireless communication node 100B, hereinafter the same) (S10). Specifically, the CU 50 allocates MT and DU resources of the parent node and the IAB node.

[0111] The CU 50 notifies the parent node of information of the radio resources allocated to the parent node (including allocation information of a cell specific signal / channel) (S20).

[0112] Further, the CU 50 notifies the IAB node of information of the radio resources allocated to the IAB node (including allocation information of a cell specific signal / channel) (S30).

[0113] In addition, the notification of the information of the radio resources can be implemented by signaling described later, or can be notified by using signaling (Radio Resource Control layer (RRC) or MAC Control Element (CE)).

[0114] The IAB node performs setting of the radio resources used by the IAB node based on the notified information of the radio resources. Specifically, the IAB node sets a communication path with the parent node and the child node using the MT and the DU resources (S35).

[0115] Further, the IAB node notifies the parent node of setting information 1, that is, notifies the parent node of information of DU resources semi-statically indicated by the CU 50 to the IAB node (H / S / NA) (S40). In addition, the IAB node notifies the parent node of setting information 2, that is, notifies the parent node of information of a wireless resource (Hard DU resource) that is treated as a "Hard" in the IAB node as a DU to which a cell specific signal or channel is allocated in the IAB node (S50).

[0116] Further, in the example shown in FIG. 6, the IAB node notifies the parent node of the setting information 1 and the setting information 2, but the CU 50 can recognize the state of the Hard DU resource of the IAB node and notify the parent node of the setting information 1 and the setting information 2. In addition, the notification (signaling) method of the setting information 1 and the setting information 2 will be described later. Figure 6

[0117] The parent node allocates a DU resource to the parent node based on the setting information of the DU of the IAB node including the setting information 1 and the setting information 2 notified by the IAB node (S60).

[0118] (3.3) Notification Action of Setting Information of Wireless Resource

[0119] Next, an example of the notification (signaling) action of the setting information of the wireless resource will be described. Figure 7 An example of signaling of the setting information 1 is shown.

[0120] As described above, the setting information 1 is information of DU resources semi-statically indicated by the CU 50 to the IAB node (H / S / NA). As shown in FIG. 5, the setting information 1 (Semi-static DU resource indication in the figure) is notified in units of radio frames. In addition, in the example shown in FIG. 5, although in units of radio frames, as described above, it can also be in units of subframes or slots. Figure 7 Figure 7 In the example shown in FIG. 5, although in units of radio frames, as described above, it can also be in units of subframes or slots.

[0121] In the example shown in FIG. 5, although in units of radio frames, as described above, it can also be in units of subframes or slots. Figure 7 ​​In the example shown, "indication #1" is displayed for radio frame #0. "Indication #1" consists of 10 elements representing information (H / S / NA) about the DU resources indicated to the IAB node. It corresponds to a subframe within the radio frame, and "indication #1" is displayed as "NA,NA,NA,NA,H,H,H,S,NA,H". That is, it shows the type (H / S / NA) of the DU resources in the time domain corresponding to each subframe within this radio frame.

[0122] exist Figure 7 The example shown illustrates that, from radio frames #0 to #9, the content of "Instruction #1" (indicated by a solid line) is repeatedly applied.

[0123] Then, for radio frame #10, “indication #2” is shown. “Indication #2”, like “indication #1”, also consists of 10 elements representing information (H / S / NA) indicating the DU resources indicated to the IAB node. In “indication #2”, it is shown as “NA,NA,H,H,H,H,H,S,NA,H”.

[0124] exist Figure 7 The example shown illustrates that, from radio frames #10 to #19, the content of "Instruction #2" (indicated by dashed lines) is repeatedly applied. Thereafter, the same information is repeated.

[0125] Additionally, due to support Figure 7 The structure shown in the configuration information 1 notification can therefore use Layer 1 (L1) signaling as the base line. Existing 3GPP Release 15 signaling methods or time slot formats can be used. If it is a new time slot format or possibly, MAC-CE and higher layer signaling can also be used.

[0126] Figure 8 The following is a signaling example of configuration information 2. As mentioned above, configuration information 2 is information about radio resources (hard DU resources) that are allocated cell-specific signals or channels in the IAB node and treated as "hard" DUs in the IAB node.

[0127] like Figure 8As illustrated, since the configuration information 2 (in the figure, "Treated as DU H resource") corresponds to a Hard DU resource that is treated as a "Hard" DU in the IAB node in association with a signal or a channel that is assigned to a cell-specific in the IAB node, it can be associated with a transmission period of the signal or the channel (for example, 160 ms of RACH, and the like).

[0128] The information of "Treated as DU H resource", that is, the Hard DU resource, can be shown in a specific resource position (in the figure, "ID") within the transmission period of the signal or the channel.

[0129] As described above, the information of the Hard DU resource includes a transmission period of the Hard DU resource (or the cell-specific signal or the channel), and an offset amount indicating a position of the Hard DU resource in the time direction (for example, as illustrated in the figure, "Offset" in the figure). Figure 8 As illustrated, 1 Radio Frame = 10 ms), but such information is not necessarily necessary. For example, for indicating the position of the Hard DU resource, it can be prescribed in advance for each corresponding signal or channel, or an offset value can not be used, and an absolute position of the Hard DU resource within the transmission period is signaled.

[0130] In addition, regarding the configuration information 2, as with the configuration information 1, since the notification of the configuration information 2 is supported, Layer 1 (L1) signaling, an existing 3GPP Release 15 signaling method, or signaling of a slot format, a MAC-CE, and a higher layer can be used.

[0131] (4) Effects

[0132] According to the above-described embodiment, the following effects can be obtained. Specifically, the parent node (wireless communication node 100A) in the IAB acquires the configuration information of the radio resource facing the child node in the IAB node (wireless communication node 100B), specifically, the configuration information 1 (Semi-static DU resource) and the configuration information 2 (Treated as DU H resource).

[0133] The setting information 1 is information of a DU resource (H / S / NA) indicated semi-statically by the CU 50 to the IAB node, and the setting information 2 is information of a wireless resource (Hard DU resource) treated as a "Hard" DU in the IAB node to which a cell specific signal or channel in the IAB node is allocated.

[0134] Thus, the parent node can acquire both of the setting information about the IAB node. Therefore, the parent node does not need to directly recognize the allocation information of the cell specific signal or channel for the DU of the IAB node, and can recognize the setting situation of the wireless resource in the IAB node in detail even in the case where the IAB node treats the wireless resource used in the setting of the cell specific signal or channel for the DU of itself as a Hard DU resource.

[0135] Thus, the parent node can more appropriately achieve the allocation of the wireless resource for the node and the IAB node on the basis of the recognition of the setting situation of the wireless resource in the IAB node at the time of Integrated Access and Backhaul (IAB) configuration.

[0136] In addition, the parent node can allocate the DU resource to the parent node on the basis of the consideration of the Hard DU resource of the IAB node, and can reduce Figure 5 the occurrence of the wasted DU resource not used as illustrated.

[0137] In the present embodiment, the setting information 1 (Semi-static DU resource) contains information indicating the type (H / S / NA) of the wireless resource in units of radio frames, subframes, or slots. Therefore, the setting information 1 can be reliably signaled in synchronization with the operation and timing of the wireless communication node constituting the IAB.

[0138] In the present embodiment, the setting information 2 (Treated as DU H resource) contains information indicating the position of the wireless resource (Hard DU resource) on the radio frames, subframes, or slots. Therefore, the setting information 2 can be signaled at an appropriate timing corresponding to the transmission period of the cell specific signal / channel of the IAB node.

[0139] In this embodiment, configuration information 2 is processed before configuration information 1. Configuration information 2 (Treated as DU H resource) is information about the modified Hard DU resource that has been allocated to the IAB node as a cell-specific signal / channel. Therefore, by prioritizing configuration information 2, the parent node can allocate radio resources based on the latest radio resource configuration status of the IAB node.

[0140] (5) Other implementation methods

[0141] The present invention has been described above along with the embodiments, but the present invention is not limited to these descriptions and various modifications and improvements can be made, which will be obvious to those skilled in the art.

[0142] For example, in the above implementation, names such as parent node, IAB node, and child node are used. However, as long as the structure of the wireless communication node is adopted, which integrates the wireless backhaul between wireless communication nodes such as gNBs and the wireless access with user terminals, the names can be different. For example, it can be simply called the first node, the second node, etc., or it can be called the upper node, the lower node, the relay node, the intermediate node, etc.

[0143] In addition, wireless communication nodes can be simply referred to as communication devices or communication nodes, or they can be replaced by wireless base stations.

[0144] The block diagram used in the description of the above embodiments ( Figure 3 , 4 The diagram illustrates blocks organized by function. These functional blocks (structural units) are implemented through any combination of at least one of hardware and software. Furthermore, there are no particular limitations on the implementation method of each functional block. That is, each functional block can be implemented using a single device that is physically or logically combined, or by directly or indirectly (e.g., using wired, wireless, etc.) connecting two or more physically or logically separate devices. Functional blocks can also be implemented by combining software with one or more of the aforementioned devices.

[0145] judging, deciding, determining, calculating, computing, processing, deriving, investigating, searching, recognizing, receiving, transmitting, outputting, accessing, resolving, selecting, choosing, establishing, comparing, assuming, expecting, considering, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, and the like, but are not limited to these. For example, a functional block (structural unit) that causes transmission to function is referred to as a transmitting unit or a transmitter. In general, as described above, the implementation method is not particularly limited.

[0146] In addition, the above-described CU 50 and the wireless communication nodes 100A to 100C (the apparatus) can also function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 9 is a diagram illustrating an example of a hardware structure of the apparatus. As illustrated in Figure 9 The apparatus can also be configured as a computer apparatus including a processor 1001, a memory 1002, a storage 1003, a communication apparatus 1004, an input apparatus 1005, an output apparatus 1006, and a bus 1007, and the like.

[0147] In addition, in the following description, the expression "apparatus" can be replaced with "circuit", "device", "unit", and the like. The hardware structure of the apparatus can be configured to include one or a plurality of each of the illustrated apparatuses, or can be configured not to include a part of the apparatuses.

[0148] Each functional block (refer to Figure 3 , 4 ) of the apparatus can be implemented by any hardware element of the computer apparatus or a combination of the hardware elements.

[0149] Further, each function in the apparatus is implemented by a method in which predetermined software (program) is read into the processor 1001, the memory 1002, and the like, and the processor 1001 performs arithmetic operation and controls at least one of communication of the communication apparatus 1004 or reading and writing of data in the memory 1002 and the storage 1003.

[0150] The processor 1001, for example, causes an operating system to work and controls the entire computer. The processor 1001 can also be constituted by a central processing device (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like.

[0151] Further, the processor 1001 reads out programs (program codes), software modules, or data, etc., from the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to the programs. As the programs, a program causing a computer to execute at least a part of the operations described in the above-described embodiments is used. In addition, regarding the above-described various processes, although it is described that the above-described various processes are executed by one processor 1001, the above-described various processes can be executed by two or more processors 1001 simultaneously or sequentially. The processor 1001 can also be mounted by one or more chips. In addition, the program can be transmitted from a network via a telecommunication line.

[0152] The memory 1002 is a computer-readable recording medium, and can be constituted by at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), a RAM (Random Access Memory), and the like, for example. The memory 1002 can also be referred to as a register, a cache, a main storage, and the like. The memory 1002 can hold a program (program code), a software module, and the like that can execute the method related to one embodiment of the present disclosure.

[0153] The storage 1003 is a computer-readable recording medium, and can be constituted by at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (for example, a compact disc, a digital versatile disc, a Blu-ray (registered trademark) disc, a smart card, a flash memory (for example, a card, a stick, a Key drive), a Floppy (registered trademark) disk, a magnetic stripe, and the like. The storage 1003 can also be referred to as an auxiliary storage device. The above-described storage medium can be, for example, a database, a server, and the like, or other appropriate medium including at least one of the memory 1002 and the storage 1003.

[0154] The communication device 1004 is a hardware (transmitting and receiving device) for communication between computers via at least one of a wired network and a wireless network, and can also be referred to as a network device, a network controller, a network card, a communication module, and the like.

[0155] The communication device 1004 can also include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like in order to realize at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD).

[0156] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an input from an outside. The output device 1006 is an output device (e.g., a display, a speaker, an LED lamp, and the like) that performs an output to the outside. The input device 1005 and the output device 1006 can also be integrally configured (e.g., a touch panel).

[0157] Further, the processor 1001, the memory 1002, and the like are connected through a bus 1007 for communication of information. The bus 1007 can be configured using a single bus, or can be configured using different buses between each device.

[0158] Further, the device can be configured to include a microprocessor, a Digital Signal Processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), a FPGA (Field Programmable Gate Array), and the like, and a part or all of each functional block can be realized by the hardware. For example, the processor 1001 can also be mounted using at least one of these hardware.

[0159] Further, the notification of the information is not limited to the form / implementation described in the present disclosure, and can be performed using other methods. For example, the notification of the information can be implemented by physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof. Further, the RRC signaling can also be referred to as an RRC message, and for example, can be an RRC connection setup message, an RRC connection reconfiguration message, or the like.

[0160] The forms / implementation described in the present disclosure can also be applied to at least one of LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, a 4th generation mobile communication system (4G), a 5th generation mobile communication system (5G), 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), systems using other appropriate systems, and next-generation systems extended therefrom. Further, the forms / implementation can also be applied in combination of a plurality of systems (e.g., at least one of LTE and LTE-A in combination with 5G, or the like).

[0161] For the processes, timings, flows, and the like of the forms / embodiments described in the present disclosure, the order can be changed without contradiction. For example, for the methods described in the present disclosure, the elements of the various steps are prompted using the order of the examples, but are not limited to the specific order prompted.

[0162] In the present disclosure, specific actions by the base station are sometimes performed by an upper node thereof according to the situation. In a network constituted by one or a plurality of network nodes having a base station, it is obvious that various actions performed for communication with a terminal can be performed by at least one of the base station and other network nodes (for example, consider MME or S-GW or the like, but not limited to these) other than the base station. In the above, a case where the other network nodes are one is exemplified, but the other network nodes can also be a combination of a plurality of other network nodes (for example, MME and S-GW).

[0163] Information, signals, and the like can be output from a higher layer (or lower layer) to a lower layer (or higher layer). It is also possible to input or output via a plurality of network nodes.

[0164] Information and the like input or output can be saved in a specific location (for example, a memory), and can be managed using a management table. The information and the like input or output can be overwritten, updated, or appended. The information and the like output can also be deleted. The information and the like input can also be transmitted to other devices.

[0165] Determination can be performed by a value (0 or 1) represented by 1 bit, by a Boolean value (true or false), or by comparison of numerical values (for example, comparison with a predetermined value).

[0166] The forms / embodiments described in the present disclosure can be used alone, in combination, or switched according to execution. In addition, notification of predetermined information is not limited to being performed explicitly (for example, notification of "X"), but can also be performed implicitly (for example, without notification of the predetermined information).

[0167] For software, regardless of being called software, firmware, middleware, microcode, hardware description language, or by another name, it should be broadly interpreted as referring to commands, command sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, execution threads, procedures, functions, and the like.

[0168] Moreover, software, commands, information, and so on can be transmitted via transmission media. For example, if the software is transmitted from a webpage, a server, or other remote source using at least one of wired technology (e.g., coaxial cables, fiber optic cables, twisted pair, digital subscriber line (DSL), or the like) and / or wireless technology (e.g., infrared, microwave, or the like), at least one of wired technology and / or wireless technology is included in the definition of transmission media.

[0169] Information, signals, and so on in the present disclosure can be represented using any of a variety of different technologies and techniques. For example, data, commands, instructions, information, signals, bits, symbols, chips, and so on that can be referenced throughout the above description can be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0170] Further, terms and words used in the present disclosure and not specifically defined in the present disclosure should be interpreted as open and inclusive rather than exclusive. For example, the use of "or" should be interpreted as inclusive, meaning "either or" or "any item by itself." Therefore, such as "A or B" means "A or B or both." Further, "and" should be interpreted as a conjunctive, meaning "both A and B." Further, "a" or "an" should be interpreted as "one or more" unless otherwise indicated. Further, the term "based on" should be interpreted as "based, at least in part, on" unless otherwise indicated.

[0171] The terms "system" and "network" used in the present disclosure can be used interchangeably.

[0172] Further, information, parameters, and so on described in the present disclosure can be expressed using absolute values, relative values to predetermined values, or corresponding other information. For example, a radio resource can be indicated by an index.

[0173] The names used for the above-described parameters are non-limiting in any respect. Further, the mathematical expressions and so on using these parameters are sometimes different from what is explicitly shown in the present disclosure. A variety of channels (e.g., PUCCH, PDCCH, and so on) and information elements can be identified by appropriate names, and thus a variety of names assigned to the variety of channels and information elements are non-limiting in any respect.

[0174] In the present disclosure, the terms "base station (BS)," "wireless base station," "fixed station," "NodeB," "eNodeB (eNB)," "gNodeB (gNB)," "access point," "transmission point," "reception point," "transmission / reception point," "cell," "sector," "cell group," "carrier," "component carrier," and the like can be used interchangeably. The base station is also called a macro cell, a small cell, a femto cell, a pico cell, and the like at times.

[0175] A base station can accommodate one or more (e.g., 3) cells. In the case where a base station accommodates multiple cells, the coverage area of the base station as a whole can be divided into multiple smaller areas, and each of the smaller areas can be provided with communication services by a base station subsystem (e.g., a small base station for indoor use (RRH: Remote Radio Head)).

[0176] The term "cell" or "sector" refers to a part or the entirety of the coverage area of at least one of a base station and a base station subsystem that provides communication services within the coverage area.

[0177] In the present disclosure, the terms "mobile station (MS)," "user terminal," "user equipment (UE)," "terminal," and the like can be used interchangeably.

[0178] For a mobile station, the following terms are also used by those skilled in the art at times: 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.

[0179] At least one of the base station and the mobile station can also be referred to as a transmission device, a reception device, a communication device, or the like. In addition, at least one of the base station and the mobile station can be a device mounted on a mobile body, the mobile body itself, or the like. The mobile body can be a vehicle (for example, an automobile, an airplane, or the like), can be a mobile body that moves in an unmanned manner (for example, a drone, an autonomous vehicle, or the like), or can be a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move when performing communication. For example, at least one of the base station and the mobile station can be an IoT (Internet of Things) device such as a sensor.

[0180] In addition, the base station in the present disclosure can also be replaced with a mobile station (user terminal, the same applies hereinafter). For example, with respect to replacing the communication between the base station and the mobile station with the communication between a plurality of mobile stations (for example, a structure also referred to as D2D (Device-to-Device), V2X (Vehicle-to-Everything), or the like), each form / embodiment of the present disclosure can also be applied. In this case, it can also be configured that the mobile station has a function that the base station has. In addition, the terms such as "uplink" and "downlink" can also be replaced with terms corresponding to the inter-terminal communication (for example, "side"). For example, the uplink channel, the downlink channel, or the like can also be replaced with a side channel.

[0181] Likewise, the mobile station in the present disclosure can also be replaced with a base station. In this case, it can also be configured that the base station has a function that the mobile station has.

[0182] A radio frame can be constituted by one or a plurality of frames in the time domain. One or a plurality of each frame in the time domain can also be referred to as a subframe.

[0183] A subframe can also be constituted by one or a plurality of slots in the time domain. The subframe can be a fixed time length (for example, 1 ms) independent of numerology.

[0184] Numerology can also be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. Numerology can indicate at least one of, for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering processing performed by a transceiver in the frequency domain, specific windowing processing performed by a transceiver in the time domain, or the like.

[0185] A slot can be configured with one or a plurality of symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, and the like) in the time domain. A slot can be a time unit based on a numerology.

[0186] A slot can also include a plurality of mini-slots. Each mini-slot can be configured with one or a plurality of symbols in the time domain. In addition, a mini-slot can also be referred to as a sub-slot. A mini-slot can also be configured with a smaller number of symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot can also be referred to as PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot can also be referred to as PDSCH (or PUSCH) mapping type B.

[0187] A radio frame, a subframe, a slot, a mini-slot, and a symbol each represent a time unit for transmitting a signal. A radio frame, a subframe, a slot, a mini-slot, and a symbol can also be referred to by other names respectively corresponding thereto.

[0188] For example, 1 subframe can also be referred to as a transmission time interval (TTI), a plurality of consecutive subframes can also be referred to as a TTI, 1 slot or 1 mini-slot can also be referred to as a TTI. That is, at least one of a subframe and a TTI can be a subframe (1 ms) in the existing LTE, can be a period shorter than 1 ms (for example, 1-13 symbols), or can be a period longer than 1 ms. In addition, a unit representing a TTI can not be a subframe, but can be referred to as a slot, a mini-slot, or the like.

[0189] Here, a TTI, for example, refers to a minimum time unit of scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling in which radio resources (a frequency bandwidth, a transmission power, and the like, which can be used in each user terminal) are allocated to each user terminal in units of TTIs. In addition, the definition of a TTI is not limited thereto.

[0190] A TTI can be a transmission time unit of a data packet (a transport block) after channel coding, a code block, a codeword, or the like, or can be a processing unit of scheduling, link adaptation, or the like. In addition, when a TTI is given, a time interval (for example, a number of symbols) to which an actual transport block, code block, codeword, or the like is mapped can be shorter than the TTI.

[0191] Further, in a case where 1 slot or 1 mini-slot is referred to as a TTI, one or more TTIs (i.e., one or more slots or one or more mini-slots) can also constitute the minimum time unit of scheduling. In addition, the number of slots (the number of mini-slots) constituting the minimum time unit of scheduling can also be controlled.

[0192] A TTI having a time length of 1 ms can be referred to as a normal TTI (a TTI in LTE Rel. 8-12), a usual TTI, a long TTI, a normal subframe, a usual subframe, a long subframe, a slot, etc. A TTI shorter than the usual TTI can be referred to as a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini-slot, a sub-slot, a slot, etc.

[0193] Further, a long TTI (e.g., a normal TTI, a subframe, etc.) can be replaced with a TTI having a time length longer than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) can be replaced with a TTI having a TTI length shorter than that of a long TTI and a TTI length of 1 ms or more.

[0194] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and in the frequency domain, can also include one or more contiguous subcarriers. The number of subcarriers included in an RB can be the same regardless of numerologies, and for example, can be 12. The number of subcarriers included in an RB can be determined based on numerologies.

[0195] Further, the time domain of an RB can include one or more symbols, and can also be the length of 1 slot, 1 mini-slot, 1 subframe, or 1 TTI. 1 TTI, 1 subframe, etc. can also be constituted by one or more resource blocks, respectively.

[0196] Further, one or more RBs can also be referred to as a physical resource block (PRB), a subcarrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0197] Further, a resource block can also be constituted by one or more resource elements (REs). For example, 1 RE can also be a wireless resource area of 1 subcarrier and 1 symbol.

[0198] A bandwidth part (BWP: Bandwidth Part) (may also be referred to as a partial bandwidth, etc.) is a subset of contiguous common resource blocks (RBs) in a certain carrier, and can also be a subset of common RBs for a certain numerology. Here, the common RBs can also be determined by the index of the RBs with reference to a common reference point of the carrier. The PRBs can also be defined by a certain BWP and numbered within the BWP.

[0199] A BWP can also include a BWP for UL (UL BWP) and a BWP for DL (DL BWP). For a UE, one or more BWPs can also be configured within one carrier.

[0200] At least one of the configured BWPs can be activated, and it can not be assumed that the UE transmits / receives a predetermined signal / channel outside the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure can also be replaced with "BWP".

[0201] The structures of the wireless frame, the subframe, the slot, the mini-slot, the symbol, etc. described above are merely examples. For example, the number of subframes included in the wireless frame, the number of slots per subframe or per wireless frame, the number of mini-slots included in the slot, the number of symbols and RBs included in the slot or the mini-slot, the number of subcarriers included in the RB, and the number of symbols, the symbol length, the cyclic prefix (CP) length, etc. within the TTI can be variously changed.

[0202] The terms "connected", "coupled" or all modifications of these terms, mean all direct or indirect connections or couplings between two or more elements, and can include the case where one or more intervening elements exist between the two elements "connected" or "coupled" to each other. The coupling or connection between elements can be physical or logical, or a combination thereof. For example, "connected" can be replaced with "accessed". In the present disclosure, for two elements, it can be considered that they are "connected" or "coupled" to each other by using at least one of a wire, a cable, and a printed electrical connection, and as some non-limiting and non-inclusive examples, by using electromagnetic energy such as electromagnetic energy having a wavelength in the radio frequency domain, the microwave region, and the light region (including both visible and non-visible regions).

[0203] The reference signal can be simply referred to as RS (Reference Signal), and can also be referred to as a pilot according to the applied standard.

[0204] The expression "according to" as used in the present disclosure is not intended to mean "only according to" unless explicitly stated otherwise. In other words, the expression "according to" means both "only according to" and "at least according to".

[0205] The "unit" in the structure of each device described above can be replaced with "section", "circuit", "apparatus", or the like.

[0206] Any reference to elements using the expressions "first", "second", and the like used in the present disclosure does not necessarily limit the number and the order of the elements. These expressions are used in the present disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to first and second elements does not mean that there can be only two elements or that the first element must precede the second element in any form.

[0207] When the expressions "include", "including", and variations thereof are used in the present disclosure, these expressions mean the same as the expression "comprising". Also, the expression "or" used in the present disclosure means not only exclusive or but also inclusive or.

[0208] In the present disclosure, in the case where a definite article is added by translation, for example, as in a, an, and the in English, the present disclosure also includes the case where the noun following the definite article is plural.

[0209] The terms "determining" and "determining" as used in this disclosure sometimes encompass a variety of actions. For example, "determining" and "determining" can include situations where actions such as judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database, or other data structure), or ascertaining are considered as having been "judged" or "determined." Furthermore, "determining" and "determining" can include situations where actions such as receiving (e.g., receiving information), transmitting (e.g., sending information), inputting, outputting, or accessing (e.g., accessing data in memory) are considered as being "judged" or "determined." Additionally, "determining" and "determining" can include situations where actions such as resolving, selecting, choosing, establishing, or comparing are considered as being "judged" or "determined." In other words, "determining" and "determining" can include situations where any action has been "judged" or "determined." In addition, "judgment (decision)" can also be replaced by "assuming", "expecting", "considering", etc.

[0210] In this disclosure, the phrase "A and B are different" can also mean "A and B are different from each other." Furthermore, this phrase can also mean "A and B are each different from C." Terms such as "separate" and "combined" can also be interpreted as "different."

[0211] The present disclosure has been described in detail above, but it will be clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered ways without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the present disclosure is for illustrative purposes only and is not intended to be limiting.

[0212] Label Explanation:

[0213] 10 Wireless Communication Systems

[0214] 50 CU

[0215] 51 NW IF Department

[0216] 53 information transmission section

[0217] 55 resource information holding section

[0218] 57 control section

[0219] 100A, 100B, 100C wireless communication node

[0220] 110 wireless transmission section

[0221] 120 wireless reception section

[0222] 130 NW IF section

[0223] 140 resource information holding section

[0224] 150 control section

[0225] 200 UE

[0226] 1001 processor

[0227] 1002 memory

[0228] 1003 storage

[0229] 1004 communication device

[0230] 1005 input device

[0231] 1006 output device

[0232] 1007 bus

Claims

1. A wireless communication node, wherein, The wireless communication node has: a mobile terminal facing an IAB donor node; a distribution unit facing an IAB node; and a control section that acquires setting information of a wireless resource facing the distribution unit, the setting information indicating availability of a symbol in a time slot of the distribution unit, the control section, in a case where a cell-specific signal or channel in the distribution unit is allocated, even if being set as a "soft resource indicating availability or unavailability as a utilization of the distribution unit" or an unutilizable resource by the setting information, handles as a utilizable hard resource, the cell-specific signal or channel includes a scheduling request.

2. A method of wireless communication, wherein, The wireless communication method includes: acquiring setting information of a wireless resource facing a distribution unit of an IAB node, the setting information indicating availability of a symbol in a time slot of the distribution unit, in a case where a cell-specific signal or channel in the distribution unit is allocated, even if being set as a "soft resource indicating availability or unavailability as a utilization of the distribution unit" or an unutilizable resource by the setting information, handles as a utilizable hard resource, the cell-specific signal or channel includes a scheduling request.

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