Wireless communication nodes

Abstract

A wireless communication node (100B) receives resource information indicating the type of resources allocated to a wireless link with a lower node from a network, and sets up a wireless link based on the resource information. A wireless communication node (100B) receives resource information indicating the type of time resources in the time direction and the type of frequency resources in the frequency direction.

Description

Technical Field

[0001] The present disclosure relates to wireless communication nodes that configure wireless access and wireless backhaul. Background Art

[0002] In the 3rd Generation Partnership Project (3GPP), the fifth generation mobile communication system (5th generation mobile communication system) (also called 5G, New Radio (NR) or Next Generation (NG)) is standardized, and the standardization of the next generation called Beyond 5G, 5G Evolution or 6G is also underway.

[0003] For example, in the radio access network (RAN) of NR, an integrated access and backhaul (IAB) is defined to integrate the radio access to the terminal (User Equipment: UE) and the radio backhaul between wireless communication nodes such as the radio base station (gNB) (see non-patent document 1).

[0004] In IAB, an IAB node has a mobile terminal (MT) having a function for connecting to a parent node (also referred to as an IAB donor) and a distributed unit (DU) having a function for connecting to a child node or UE.

[0005] In Release 17 of 3GPP, simultaneous transmission and reception using frequency division multiplexing (FDM) is expected to be supported in the MT, which is a radio link (Link_parent) between a parent node and an IAB node, and in the DU, which is a radio link (Link_child) between an IAB node and a child node.

[0006] Prior art literature

[0007] Non-patent literature

[0008] Non-patent document 1: 3GPP TS 38.213 V16.1.0, 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Physical layer procedures for control (Release 16), 3GPP, March 2020 Summary of the invention

[0009] However, there are the following problems in achieving simultaneous transmission and reception between MT and DU using FDM as described above: Specifically, the wireless communication node constituting the IAB node cannot determine whether the DU resources (specifically, frequency resources) allocated to Link_child can be used for simultaneous transmission and reception with MT using FDM.

[0010] Therefore, the following disclosure is made in view of such a situation, and an object of the disclosure is to provide a wireless communication node capable of performing appropriate simultaneous transmission and reception using FDM in an MT and a DU.

[0011] One embodiment of the present disclosure is a wireless communication node (wireless communication node 100B), which includes: a receiving unit (wireless receiving unit 162), which receives resource information "indicating the type of resources allocated to the wireless link with the lower node" from the network; and a control unit (control unit 190), which sets the wireless link according to the resource information, and the receiving unit receives the resource information "indicating the type of time resources in the time direction and the type of frequency resources in the frequency direction".

[0012] One embodiment of the present disclosure is a wireless communication node (wireless communication node 100B), which includes: a receiving unit (wireless receiving unit 162) that receives resource information "indicating the type of resources allocated to a wireless link with a lower node" from a network; and a control unit (control unit 190) that sets the wireless link based on the resource information, and the receiving unit receives the resource information "indicating the type of resources for each combination of a position in a time direction and a position in a frequency direction". BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a diagram schematically showing the overall structure of the wireless communication system 10 .

[0014] Figure 2 It is a diagram showing a basic configuration example of IAB.

[0015] Figure 3 FIG. 4 is a functional block diagram of the wireless communication node 100A.

[0016] Figure 4 FIG. 4 is a functional block diagram of the wireless communication node 100B.

[0017] Figure 5A This is a diagram showing an example of usage of frequency resources of a DU service cell and an MT service cell based on scenario 1.

[0018] Figure 5B This is a diagram showing an example of usage of frequency resources of a DU service cell and an MT service cell based on scenario 2.

[0019] Figure 5C This is a diagram showing an example of usage of frequency resources of a DU service cell and an MT service cell based on scenario 3.

[0020] Figure 6 This is a diagram showing a schematic communication sequence related to the setting of DU resources of the IAB node.

[0021] Fig. 7A This is a diagram showing a configuration example of DU resources according to option 1.

[0022] Figure 7B This is a diagram showing an example of setting DU resources according to Option 2.

[0023] Figure 8 This is a diagram showing an indication example of DU resources related to action example 1 (option 1).

[0024] Fig. 9 This is a diagram showing an indication example of DU resources related to operation example 1-1.

[0025] Fig.10 This is a diagram showing an example of indicating DU resources in accordance with operation example 1a.

[0026] Fig.11 This is a diagram showing an indication example of DU resources related to action example 2 (option 2).

[0027] Fig.12 This is a diagram showing an example of indicating DU resources related to action example 2-1 (option 2-1-1).

[0028] Fig.13A This is a diagram showing an indication example (part 1) of DU resources related to action example 2-1 (option 2-1-2).

[0029] Fig. 13B This is a diagram showing an indication example (part 2) of DU resources related to action example 2-1 (option 2-1-2).

[0030] Fig.14AThis is a diagram showing an example of indicating DU resources related to action example 2-2 (option 2-2-1).

[0031] Fig. 14B This is a diagram showing an example of indicating DU resources related to action example 2-2 (option 2-2-2).

[0032] Fig.15 This is a diagram showing an indication example of DU resources related to action example 4.

[0033] Fig.16 This is a diagram showing an example of indicating DU resources related to action example 5.

[0034] Fig.17 1 is a diagram showing an example of the hardware configuration of the CU 50 , the wireless communication nodes 100A to 100C, and the UE 200 . DETAILED DESCRIPTION

[0035] Hereinafter, the embodiments will be described with reference to the accompanying drawings. In addition, the same or similar reference numerals are given to the same functions and structures, and the description thereof will be appropriately omitted.

[0036] (1) Overall schematic structure of wireless communication system

[0037] Figure 1 1 is a diagram schematically showing the overall configuration of a wireless communication system 10 according to the present embodiment. The wireless communication system 10 is a wireless communication system in accordance with 5G New Radio (NR), and is composed of a plurality of wireless communication nodes and terminals.

[0038] Specifically, the wireless communication system 10 includes wireless communication nodes 100A, 100B, 100C and a user terminal 200 (hereinafter referred to as UE 200 ).

[0039] The wireless communication nodes 100A, 100B, and 100C can set up wireless access with the UE 200 and a wireless backhaul (BH) between the wireless communication nodes. Specifically, a backhaul (link) based on a wireless link is set up 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.

[0040] In this way, a structure in which the radio access with the UE 200 and the radio backhaul between the radio communication nodes are integrated is called an integrated access and backhaul (IAB).

[0041] IAB reuses existing functions and interfaces defined for wireless access. In particular, the mobile terminal (MT), gNB-DU (Distributed Unit), gNB-CU (Central Unit), user plane function (UPF), access and mobility management function (AMF) and session management function (SMF), as well as corresponding interfaces such as NR Uu (MT to gNB / DU), F1, NG, X2 and N4 can be used as a baseline.

[0042] The wireless communication node 100A is connected to the NR radio access network (NG-RAN) and the core network (Next Generation Core (NGC: Next Generation Core) or 5GC) via a wired transmission path such as optical fiber transmission. The NG-RAN / NGC includes a centralized unit 50 (Central Unit) (hereinafter referred to as CU 50) as a communication node. In addition, the NG-RAN and NGC may be simply expressed as a "network".

[0043] In addition, CU 50 may also be composed of any one or a combination of the above-mentioned UPF, AMF, and SMF. Alternatively, CU50 may also be the above-mentioned gNB-CU.

[0044] Figure 2 : is a diagram showing a basic structural example of IAB. Figure 2 As shown, in this embodiment, the wireless communication node 100A constitutes a parent node in the IAB, and the wireless communication node 100B (and the wireless communication node 100C) constitute an IAB node in the IAB.

[0045] In addition, the parent node can be referred to as an upper node in relation to the IAB node. Also, the parent node can be referred to as an IAB donor. In addition, the IAB node can be referred to as a lower node in relation to the parent node.

[0046] The child node in IAB consists of Figure 1 Alternatively, UE200 may constitute a child node. The IAB node may be referred to as an upper node in relation to the child node, and the child node may be referred to as a lower node in relation to the IAB node.

[0047] A wireless link is established between the parent node and the IAB node. Specifically, a wireless link called Link_parent is established.

[0048] A wireless link is established between the IAB node and the child node. Specifically, a wireless link called Link_child is established.

[0049] This wireless link set between wireless communication nodes can be called a wireless backhaul link (Backhaullink). Link_parent consists of the "DL Parent BH" in the downlink direction and the "UL Parent BH" in the uplink direction. Link_child consists of the "DL Child BH" in the downlink direction and the "UL Child BH" in the uplink direction.

[0050] In addition, the radio link established between the UE 200 and the IAB node or the parent node is called a radio access link. Specifically, the radio link is composed of a DL access (DL Access) in the downlink direction and a UL access (UL Access) in the uplink direction.

[0051] The IAB node has a function for connecting to the parent node, namely a mobile terminal (MT) and a function for connecting to the child node (or UE 200), namely a distributed unit (DU). Figure 2 , but the parent and child nodes have MT and DU.

[0052] Among the wireless resources used by DU, downlink (DL), uplink (UL) and flexible time-resource (D / U / F) are classified into any type of "Hard", "Soft" or "Not Available" (H / S / NA) based on the DU's point of view. In addition, within Soft (S), "Available" or "Not Available" is also specified.

[0053] Flexible time resources (F) are time resources that can be used in either DL or UL. In addition, "Hard" means that the corresponding time resource is a wireless resource that can always be used as a DU child link connected to a child node or UE, and "Soft" means that the parent node explicitly or implicitly controls whether the corresponding time resource can be used as a wireless resource (DU resource) for a DU child link.

[0054] Furthermore, in the case of Soft (S), the wireless resources to be notified can be determined according to whether it is IA or INA.

[0055] "IA" means explicitly or implicitly indicating that the DU resource is available. In addition, "INA" means explicitly or implicitly indicating that the DU resource is not available.

[0056] in addition, Figure 2 The example of the IAB structure shown uses CU / DU splitting, but the structure of the IAB is not necessarily limited to this structure. For example, in the wireless backhaul, the IAB can be composed of a tunnel using GPRS Tunneling Protocol-U / User Datagram Protocol (GTP-U / UDP) / Internet Protocol (IP).

[0057] The main advantage of IAB is the ability to flexibly and densely configure NR cells without densifying the transmission network. IAB can be applied to various scenarios such as outdoor small cell configuration, indoor, and mobile relay station (mobilerelay) support (for example, in buses and trains).

[0058] In addition, if Figure 1 and Figure 2 As shown, IAB can also support extensions based on standalone (SA) based on NR only or non-standalone (NSA) based on extensions including other RATs (LTE, etc.).

[0059] In this embodiment, the wireless access and wireless backhaul may be half-duplex communication or full-duplex communication. In addition, the multiplexing method may utilize time division multiplexing (TDM), space division multiplexing (SDM) and frequency division multiplexing (FDM).

[0060] When the IAB node operates in half-duplex communication, the DL Parent BH becomes the receiving (RX) side, the UL Parent BH becomes the transmitting (TX) side, the DL Child BH becomes the transmitting (TX) side, and the UL Child BH becomes the receiving (RX) side. In addition, in the case of time division duplex (TDD), the DL / UL setting mode in the IAB node is not limited to DL-F-UL, and only wireless backhaul (BH), UL-F-DL and other setting modes can be applied.

[0061] Furthermore, in this embodiment, SDM / FDM is used to realize the simultaneous operation of the DU and the MT of the IAB node.

[0062] (2) Functional block structure of wireless communication system

[0063] Next, the functional block configuration of the wireless communication node 100A and the wireless communication node 100B constituting the wireless communication system 10 will be described.

[0064] (2.1) Wireless communication node 100A

[0065] Figure 3 FIG. 1 is a functional block diagram of the wireless communication node 100A constituting the parent node. Figure 3 As shown, the wireless communication node 100A includes a wireless transmission unit 110 , a wireless reception unit 120 , a NW IF unit 130 , an IAB node connection unit 140 , and a control unit 150 .

[0066] The wireless transmission unit 110 transmits a wireless signal in accordance with the 5G specification. In addition, the wireless reception unit 120 transmits a wireless signal in accordance with the 5G specification. In this embodiment, the wireless transmission unit 110 and the wireless reception unit 120 perform wireless communication with the wireless communication node 100B constituting the IAB node.

[0067] In the present embodiment, the wireless communication node 100A has the functions of MT and DU, and the wireless transmission unit 110 and the wireless reception unit 120 also transmit and receive wireless signals corresponding to MT / DU.

[0068] The wireless transmission unit 110 and the wireless reception unit 120 can perform wireless communication in accordance with half-duplex and full-duplex. In addition, the wireless transmission unit 110 and the wireless reception unit 120 are not limited to TDM (TDD) and can also perform wireless communication in accordance with FDM and SDM.

[0069] The NW IF unit 130 provides a communication interface for achieving connection with the NGC side, etc. For example, the NW IF unit 130 may include interfaces such as X2, Xn, N2, and N3.

[0070] The IAB node connection unit 140 provides an interface for realizing connection with an IAB node (or a sub-node including a UE). Specifically, the IAB node connection unit 140 provides a function of a distributed unit (DU). That is, the IAB node connection unit 140 is used for connection with an IAB node (or a sub-node).

[0071] In addition, the IAB node can also be described as a RAN node that "supports wireless access for UE 200 and wirelessly backhauls access traffic." In addition, the parent node, that is, the IAB donor, can also be described as a RAN node that "provides a UE interface to the core network and a wireless backhaul function to the IAB node."

[0072] The control unit 150 controls each functional block constituting the wireless communication node 100A. In particular, in the present embodiment, the control unit 150 controls the setting of a wireless link with the IAB node (wireless communication node 100B).

[0073] Specifically, the control unit 150 can determine DU resources (which may be referred to as radio resources) to be allocated to “the radio link set up via the DU function for the IAB node”.

[0074] The resources may include time resources in the time direction and frequency resources in the frequency direction.

[0075] Time resources refer to resources in the time direction, and can be in units of symbols, time slots, or subframes. In addition, the time direction can be called a time domain, a symbol period, or a symbol time, etc. In addition, a symbol can be called an orthogonal frequency division multiplexing (OFDM) symbol.

[0076] Frequency resources refer to resources in the frequency direction, and resource blocks, resource block groups, subcarriers, etc. can be used as units. In addition, the frequency direction can be called frequency domain, resource blocks, resource block groups, subcarriers, BWP (Bandwidth part), etc.

[0077] (2.2) Wireless Communication Node 100B

[0078] Figure 4FIG. 1 is a functional block diagram of a wireless communication node 100B constituting an IAB node. Figure 4 As shown, the wireless communication node 100B includes a wireless transmission unit 161 , a wireless reception unit 162 , an upper node connection unit 170 , a lower node connection unit 180 , and a control unit 190 .

[0079] As described above, the wireless communication node 100B has functional blocks similar to those of the wireless communication node 100A (parent node) described above, but has an upper node connection unit 170 and a lower node connection unit 180 , and the function of the control unit 190 is different.

[0080] The wireless transmission unit 161 transmits a wireless signal in accordance with the 5G specification. In addition, the wireless reception unit 162 transmits a wireless signal in accordance with the 5G specification. In this embodiment, the wireless transmission unit 161 and the wireless reception unit 162 perform wireless communication with the wireless communication node 100A constituting the parent node, and wireless communication with the child node (including the case of the UE 200).

[0081] Similar to the wireless communication node 100A (parent node), the wireless transmission unit 161 and the wireless reception unit 162 are not limited to wireless communication in accordance with Half-duplex and Full-duplex and further limited to TDM (TDD), and can also perform wireless communication in accordance with FDM and SDM.

[0082] In this embodiment, the wireless receiving unit 162 can receive resource information "indicating the type of resources allocated to the wireless links with other wireless communication nodes constituting the child nodes" from the network in the relationship with the lower node, specifically, the UE 200 or the IAB node. In this embodiment, the wireless receiving unit 162 constitutes the receiving unit.

[0083] Specifically, the wireless receiving unit 162 is capable of receiving resource information indicating the type (H / S / NA) of DU resources allocated to the wireless link set via the function of the DU facing the lower node. The resource information may be sent from the CU 50 in accordance with the F1-AP (Application) protocol applied to the F1 interface between the CU and DU, or may be sent from the network (specifically, the gNB) through signaling of the radio resource control layer (RRC).

[0084] The resource information received by the wireless reception unit 162 can indicate the type (H / S / NA) of a time resource and the type (H / S / NA) of a frequency resource.

[0085] Specifically, the resource information can show the resource type (Hard, Soft, or NA) of each unit (eg, symbol) in the time direction and the resource type (Hard, Soft, or NA) of each unit (eg, subcarrier) in the frequency direction.

[0086] In addition, as described above, the unit in the time direction is not limited to a symbol, and may be a time slot composed of a plurality of symbols (for example, 14 symbols) or the like.

[0087] In addition, resource information can indicate frequency resources based on resource blocks (RBs) or resource block groups (RGBs). One RB can be interpreted as 12 resource elements (REs) in the frequency domain, and one RE can be interpreted as the smallest unit of a resource grid consisting of one subcarrier in the frequency domain (one OFDM symbol in the time domain).

[0088] Furthermore, as described later, the resource information may indicate the type of time resource and the type of frequency resource separately, or may indicate a combination of the type of time resource and the type of frequency resource.

[0089] Alternatively, the resource information may also indicate the type of resource for each combination of the position in the time direction and the position in the frequency direction. For example, the resource information may indicate the resource type (Hard, Soft, or NA) of each combination of a symbol position (which may be determined by a symbol number) and a subcarrier position (which may be determined by a subcarrier number or an RB / RBG index) (i.e., a combination of a time resource and a frequency resource (which may be expressed as a set).

[0090] In addition, even in the case where the resource type is shown for each combination (set) of time resources and frequency resources, the resource information can also show the resource type (Hard, Soft, or NA) of each combination of time resources and frequency resources specified by the unit in the time direction (e.g., codeword) and the unit in the frequency direction (e.g., subcarrier).

[0091] Furthermore, the resource information may collectively indicate a plurality of resources of the same type that are continuous in the time direction or the frequency direction (or at least one of them).

[0092] For example, the resource information may indicate the time slot number at which the same type of resource (eg, Hard) starts and the number of time slots (eg, 2 time slots) that the same type of resource continues in the time direction. Specific examples of the resource information will be described later.

[0093] The upper node connection unit 170 provides an interface for connecting to a node higher than the IAB node. The upper node refers to a wireless communication node located on the network side, specifically on the core network side (also called upstream or uplink side) of the IAB node.

[0094] Specifically, the upper node connection unit 170 provides a mobile terminal (MT) function. That is, in the present embodiment, the upper node connection unit 170 is used to connect to a parent node constituting an upper node.

[0095] The lower node connection unit 180 provides an interface for connecting to a node lower than the IAB node. The lower node means a wireless communication node located closer to the end user side (also called downstream side or downlink side) than the IAB node.

[0096] Specifically, the lower node connection unit 180 provides the function of a distributed unit (DU) That is, in the present embodiment, the lower node connection unit 180 is used to connect to a child node (which may be the UE 200) constituting a lower node.

[0097] The control unit 190 controls each functional block constituting the wireless communication node 100B. In particular, in the present embodiment, the control unit 190 sets a wireless link based on resource information received from the network (which may include the CU 50).

[0098] Specifically, the control unit 190 can determine the resources (DU resources) allocated to the wireless link with the lower node, specifically, other wireless communication nodes that constitute child nodes in the relationship with the UE 200 or the IAB node, based on the type of time resources (H / S / NA) and the type of frequency resources (H / S / NA) indicated by the resource information.

[0099] Various channels may be transmitted and received via the wireless link to which the DU resources are allocated.

[0100] The channels include control channels and data channels. The control channels include PDCCH (Physical Downlink Control Channel), PUCCH (Physical Uplink Control Channel), PRACH (Physical Random Access Channel) and PBCH (Physical Broadcast Channel).

[0101] In addition, the data channel includes PDSCH (Physical Downlink Shared Channel) and PUSCH (Physical Uplink Shared Channel) and the like.

[0102] In addition, 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. In addition, data may mean data sent via a data channel.

[0103] Uplink Control Information (UCI) is UL control information and is symmetrical control information as Downlink Control Information (DCI). UCI is transmitted via PUCCH or PUSCH. UCI may include SR (Scheduling Request), HARQ (Hybrid Automatic repeat request) ACK / NACK and CQI (Channel Quality Indicator), etc.

[0104] DCI is DL control information. DCI is sent via PDCCH. DCI may include scheduling information of PDSCH and PUSCH, etc.

[0105] (3) Operation of wireless communication system

[0106] Next, the operation of the wireless communication system 10 is described. Specifically, the operation associated with "simultaneous transmission and reception using FDM between the wireless link (parent link (Link_parent)) between the IAB node (wireless communication node 100B) and the parent node (wireless communication node 100A) and the wireless link (child link (Link_child)) between the IAB node and the child node (UE 200 or other wireless communication nodes constituting the child node)".

[0107] (3.1) Prerequisites

[0108] In Release 16 of 3GPP, TDM-based resource multiplexing is specified between a parent link and a child link.

[0109] Specifically, the TDM DU resources can be configured semi-statically. In each serving cell formed by the IAB node DU, the IAB node DU can set the resource type (type) of Hard, Soft, or NA for the symbol in each time slot.

[0110] This setting can be realized using the F1-AP message GNB-DU RESOURCE CONFIGURATION sent from the CU 50.

[0111] In addition, when the DU resource (symbol) is Soft, dynamic indication (IA or INA) can be performed explicitly and implicitly.

[0112] Specifically, when the DL, UL or Flexible symbol is set to Soft, the IAB Node DU can perform transmission and reception, or either transmission or reception within the symbol only in the following cases.

[0113] The IAB node MT does not transmit or receive in this symbol (implicit indication).

[0114] Since the IAB node MT performs transmission or reception in this symbol, the transmission or reception in this symbol due to the use of this symbol by the IAB node DU is not changed (implicit indication).

[0115] The IAB node MT detects DCI format 2_5 (refer to 3GPP TS38.212 Chapter 7.3), and indicates (explicitly indicates) that the symbol is available through the field value indexed by the availability indicator (AI: Availability Indicator).

[0116] In addition, regarding DU resources in the frequency domain, CU 50 can use the information element (IE) of the serving cell information (Served Cell Information) to set the frequency information and transmission bandwidth of the serving cell (hereinafter referred to as the DU serving cell) formed by the DU via F1-AP signaling. Served Cell Information can include IEs of NR frequency information (NRFrequency Info) and transmission bandwidth (Transmission Bandwidth).

[0117] Table 1 shows a structural example of the Transmission Bandwidth specified in Chapter 9.3.1.15 of 3GPP TS 38.473.

[0118] [Table 1]

[0119]

[0120] Transmission Bandwidth is used to indicate the transmission bandwidth of UL or DL.

[0121] Table 2 shows an example structure of NR Frequency Info specified in Chapter 9.3.1.17 of 3GPP TS38.473.

[0122] [Table 2]

[0123]

[0124] NR Frequency Info can define the carrier frequency used in a cell for a specific direction (UL or DL) in FDD and a bidirectional or supplementary uplink (SUL) carrier in TDD.

[0125] In Release 16 of 3GPP, the donor CU and the parent node can identify the multiplexing capability (whether TDM is required) of any MT component carrier (CC) or DU cell pair between the MT and the DU for the IAB node.

[0126] Furthermore, as shown below, with respect to the combination in the transmit / receive direction (each pair of MT CC or DU cells), an indication of the multiplexing capability of the IAB node in the case where the MT and DU are non-TDM is additionally provided.

[0127] MT send / DU send

[0128] MT send / DU receive

[0129] MT receiving / DU sending

[0130] MT receiving / DU receiving

[0131] Regarding simultaneous transmission and reception in the parent link and the child link due to resource multiplexing between the parent link and the child link based on FDM, the following assumptions 1 to 3 are considered.

[0132] Figure 5A , Figure 5B and Figure 5CAn example of using frequency resources of a DU serving cell and a MT serving cell based on assumptions 1 to 3 is shown.

[0133] (Assumption 1): The DU serving cell and the MT serving cell perform simultaneous transmission and reception (which may mean simultaneous transmission or simultaneous reception) using resources that do not overlap in the frequency direction.

[0134] like Figure 5A As shown, the DU transmission band does not overlap with the BWP of the MT serving cell (which can be set in the RRC layer by signaling).

[0135] In addition, the DU serving cell and the MT serving cell may mean cells formed by the DU and the MT of the IAB node, respectively.

[0136] (Assumption 2): The DU serving cell and the MT serving cell perform simultaneous transmission and reception using resources that completely overlap in the frequency direction.

[0137] (Assumption 3): The DU serving cell and the MT serving cell perform simultaneous transmission and reception using resources that partially overlap in the frequency direction.

[0138] In the case of (Assumption 1), since the bandwidths of the DU service cell and the MT service cell are set to be non-overlapping, if the multiplexing capability of the IAB node supports simultaneous transmission and reception of a pair consisting of the DU service cell and the MT service cell, as long as the transmission direction matches the multiplexing capability, the MT and DU of the IAB node can perform simultaneous transmission and reception. In this case, no additional signaling for resource multiplexing in the frequency domain is required.

[0139] In the case of (Assumption 2) or (Assumption 3), even if the IAB node has the ability to support simultaneous transmission and reception of a pair consisting of a DU service cell and a MT service cell, the MT and DU of the IAB node can only perform simultaneous transmission and reception when the parent node and the IAB node have a common understanding that orthogonal frequency resources are used by the MT and DU.

[0140] Based on the provisions of 3GPP Release 16, in this embodiment, semi-static or dynamic resource multiplexing between a parent link and a child link based on FDM can be implemented.

[0141] (3.2) Operation Overview

[0142] The following describes semi-static resource multiplexing based on FDM and also describes dynamic resource multiplexing. In addition, the actions described below are not limited to (Assumption 2) or (Assumption 3), but can also be applied to the case of (Assumption 1).

[0143] In the operation example described below, simultaneous transmission and reception of MT and DU by FDM of the IAB node in the same frequency band (may be simply referred to as band or frequency range, etc.), that is, frequency division multiplexing (FDD) can be performed.

[0144] The following two options can be set to support FDD operation of MT and DU based on IAB node.

[0145] (Option 1): The availability (H / S / NA) of the DU resources of the IAB node can be set semi-statically for each frequency axis / time axis (each unit in the frequency direction / time direction).

[0146] (Option 2): The availability (H / S / NA) of the DU resources of the IAB node is semi-statically set for each matrix (combination) of the frequency / time axis (units in the frequency direction / time direction).

[0147] The operation examples described below are composed of operation examples 1 to 5.

[0148] (Action Example 1): Action example associated with Option 1

[0149] (Option 1-1): Set the index of the resource block / resource block group (RB / RBG) set to H / S / NA at the same time

[0150] (Option 1-1-1): Set the starting index and number of RBs / RBGs set to H / S / NA

[0151] The starting index can be notified based on any of the following methods.

[0152] (Alt.1): NR-ARFCN (Absolute Radio-Frequency Channel Number)

[0153] (Alt. 2): Offset relative to CRB (Carrier Resource Block) #0 In addition, the start index of RB / RBG and the number of RB / RBG can be set by any of the following methods.

[0154] (Alt.1): Alone

[0155] (Alt.2): Using (RIV, Resource Indicator Value)

[0156] (Option 1-1-2): Use a bitmap to set each H / S / NA

[0157] (Option 1-2): Set the H / S / NA of each RB / RBG according to the RB / RBG index order

[0158] (Action Example 1a): This is an action example related to Option 1, but H / S / NA in the frequency direction is set for each time resource (3GPP Release 16 H / S / NA setting in the time direction is not required)

[0159] (Action Example 2): Action example related to Option 2

[0160] (Option 2-1): Set all resources that are set to H / S / NA

[0161] (Option 2-1-1): Set for each frequency axis / time axis

[0162] (Option 2-1-2): For resources shown in the frequency axis / time axis matrix, set the bitmap for each H / S / NA

[0163] (Action Example 2-2): Set the H / S / NA of each resource in the order of frequency, time, or time, frequency.

[0164] (Action Example 3): RBG Setting

[0165] The size of the RBG is pre-defined by the 3GPP specification or set by signaling such as RRC.

[0166] (Action Example 4): Setting the default resource type

[0167] For example, a default value (H / S / NA) is set for each RB / RBG.

[0168] (Action Example 5): Setting resource types

[0169] For example, two (H / S) of the resource types (H / S / NA) are set.

[0170] (3.3) Action example

[0171] First, the overall sequence regarding the configuration of DU resources of the IAB node will be described. Figure 6 A schematic communication sequence related to the setting of DU resources of the IAB node is shown.

[0172] like Figure 6 As shown, the CU 50 transmits a GNB-DU RESOURCE CONFIGURATION including the DU resource category (type) of the IAB node to the wireless communication node 100B (IAB node) ( S10 ).

[0173] GNB-DU RESOURCE CONFIGURATION is a type of F1-AP message and is specified in 3GPP TS38.473.

[0174] When receiving GNB-DU RESOURCE CONFIGURATION, the wireless communication node 100B, specifically the DU of the IAB node, returns GNB-DU RESOURCE CONFIGURATION ACKNOWLEDGE (S20) to the CU 50. In addition, GNB-DU RESOURCE CONFIGURATION and GNB-DU RESOURCE CONFIGURATION ACKNOWLEDGE are one type of F1-AP messages and are specified in 3GPP TS38.473.

[0175] The wireless communication node 100B sets the DU resource according to the type of DU resource (H / S / NA) included in the GNB-DU RESOURCE CONFIGURATION ( S30 ).

[0176] Specifically, the wireless communication node 100B determines the time resources and frequency resources to be allocated to the child link (Link_child) according to the type of DU resources (H / S / NA). In addition, as described above, the child link can be called a DU serving cell.

[0177] The wireless communication node 100A (parent node) and the wireless communication node 100B set a parent link (Link_parent) and a child link (Link_child) (S40). As described above, in this operation example, transmission and reception according to FDM, that is, FDD, is performed between the parent link and the child link.

[0178] Fig. 7A An example of setting DU resources according to Option 1 is shown. Figure 7B An example of setting DU resources according to Option 2 is shown.

[0179] As described above, in Option 1, the H / S / NA of the frequency resource can be set for each DU serving cell, but in Option 1, the setting method of the DU symbol (time resource) of Release 16 (hereinafter referred to as Rel-16) of 3GPP can also be reused. Whether the DU can use the time / frequency (TF) resource needs to be determined based on both the H / S / NA setting of the DU symbol (i.e., time resource) of Rel-16 and the H / S / NA setting of the frequency resource of Option 1.

[0180] like Fig. 7AAs shown, the time direction determines the type of each DU resource (Hard, Soft or NA) according to the H / S / NA setting of Rel-16, and the frequency direction determines the type of each DU resource (Hard, Soft or NA) according to the H / S / NA setting of option 1.

[0181] That is, when the settings of both the time direction and the frequency direction are Hard (H), the DU resource can be used for sending or receiving, and when the settings of either the time direction or the frequency direction are NA, the DDU resource cannot be used for sending / receiving. In addition, in other cases (when the settings of either or both of the time direction and the frequency direction are Soft (S)), DCI format 2_5 is used to notify the parent node whether the sending / receiving of the DU resource can be used.

[0182] In addition, as described above, in Option 2, TF resources can be set to Hard, Soft, or NA for each DU serving cell. In Option 2, separate settings of H / S / NA are not required for DU symbols of Rel-16. Whether a DU can use TF resources can be directly determined according to the settings based on Option 2.

[0183] (3.3.1) Action Example 1

[0184] Regarding option 1, the following sub-options can be further set.

[0185] (Option 1-1): A set of frequency resources and a resource type of the set of frequency resources are shown.

[0186] (Option 1-2): The sequence of resource types is shown, and each resource type corresponds to each frequency resource in the DU transmission band.

[0187] In addition, the granularity of frequency resources may be RB or RBG (RB / RBG).

[0188] Figure 8 An example of indicating DU resources related to action example 1 (option 1) is shown. Figure 8 As shown, the indication of DU resources can be based on the DU transmission band. Figure 8 In the example shown, resource blocks (RB) #1, 6, and 10 are set to Hard, RB #5 and 7 are set to Soft, and RB #4, 8, and 9 are set to NA.

[0189] In the case of option 1-1, if Figure 8 As shown, the numbers of RBs and resource types (H / S / NA) included in each set (#1 to 3) of frequency resources are shown.

[0190] In the case of option 1-2, the timing (H, S, NA, NA, S, H, S, NA, NA, H) of resource types (H / S / NA) following the order (Index) of RBs is shown.

[0191] (3.3.1.1) Example 1-1 of the action according to option 1-1

[0192] In the case of option 1-1, the following options may be further set to indicate a set of frequency resources.

[0193] (Option 1-1-1): A plurality of consecutive RBs / RBGs are shown. Specifically, the start RB / RBG (RB_start / RBG_start) and the number of consecutive RBs / RBGs (L_RB / L_RBG) are shown.

[0194] (Option 1-1-2): A bitmap corresponding to each RB / RBG in a DU transmission band is shown.

[0195] Fig. 9 An example of indicating DU resources related to action example 1-1 is shown. Fig. 9 In the example shown, Figure 8 Similarly, resource blocks (RB) #1, 6, and 10 are set to Hard, RB #5 and 7 are set to Soft, and RB #4, 8, and 9 are set to NA.

[0196] In the case of option 1-1-1, if Fig. 9 As shown, the start position of the frequency resource set to NA (RB#3 and #8), the number of consecutive RBs (2), and the type of frequency resource (NA) are shown (refer to the circled portion in the figure).

[0197] In the case of option 1-1-2, if Fig. 9 As shown, RBs of NA (eg, set to "1") are shown by a bitmap corresponding to RBs in the DU transmission band.

[0198] In addition, in this case, in the bitmap, "0" or "1" may mean that RB / RBG of the number of bits is included in the set.

[0199] (3.3.1.2) Example 1-1-1 of the action according to option 1-1-1

[0200] In the case of option 1-1-1, as described above, the start RB / RBG, that is, the start index of the RB / RBG may be indicated based on any of the following as a reference, as the offset of the RB / RBG.

[0201] (Alt.1): Absolute frequency position shown by NR-ARFCN

[0202] (Alt.2): CRB#0 of DU serving cell

[0203] In addition, the starting RB / RBG and the number of RB / RBG may be indicated by any of the following.

[0204] (Alt.1): Alone

[0205] (Alt.2): Simultaneously using (RIV, Resource Indicator Value)

[0206] RIV is specified in 3GPP TS38.214. In the case of Alt.2, RIV can be calculated as follows.

[0207] [Formula 1]

[0208]

[0209] N BW The number of RBs / RBGGs corresponding to the DU transmission band may be a value defined by the 3GPP specification or may be set by the CU 50. In addition, in the case of RBG, L_RB and RB_start may be replaced by L_RBG and RBG_start.

[0210] In addition, the starting RB may be shown as an offset of the granularity of RB, and the number of RBs may be shown by the granularity of RBG.

[0211] (3.3.1.3) Action Example 1a

[0212] As a modification example of Option 1 above, for each DU serving cell, each frequency resource may be set to Hard, Soft, or NA for each time unit.

[0213] Fig.10 An example of indicating DU resources related to operation example 1a is shown. As in operation example 1, the setting of H / S / NA for DU symbols in Rel-16 is reused.

[0214] Regarding whether the DU of the IAB node can use the TF resources, the IAB node can determine based on both the H / S / NA settings of the DU codeword according to Rel-16 and the H / S / NA settings of the frequency resources of Option 1.

[0215] Here, the difference from Option 1 is that if the time unit (e.g., symbol) is different, different resource types (H / S / NA) can be set for the frequency resources (refer to the circled portion in the figure). On the other hand, the H / S / NA setting of the frequency resource for each time unit is the same as that in Operation Example 1. ... Fig. 7A Likewise, whether or not the DU resources can be used for transmission / reception is determined according to the H / S / NA settings in the time direction and the frequency direction.

[0216] The time unit may be any one of multiple subframes, subframes, multiple time slots, time slots, symbols, symbol groups or D / U / F within each time slot.

[0217] In addition, the granularity may be predefined as a 3GPP specification or may be set by the network. Similarly, the periodicity in the time domain may be predefined as a 3GPP specification or may be set by the network. In addition, the set resource type may be repeated according to the periodicity.

[0218] (3.3.2) Action Example 2

[0219] Regarding option 2, the following sub-options can be further set.

[0220] (Option 2-1): A set of TF resources and resource types of the set of TF resources are shown.

[0221] (Option 2-2): The time sequence of resource types is shown, and each resource type corresponds to a TF resource.

[0222] In addition, the granularity of the frequency domain may be RB or RBG (RB / RBG). The granularity of the time domain may be any one of the symbols of each time slot, the symbol group, the entire time slot, or D / U / F.

[0223] In addition, the periodicity in the time domain may be predefined as a 3GPP specification, or may be set by the CU 50. The set resource type may be repeated according to the periodicity.

[0224] Fig.11 An example of indicating DU resources related to action example 2 (option 2) is shown. Fig.11 As shown, the type of DU resources of the IAB node can be shown according to each matrix (combination) of units in the frequency direction / time direction, specifically, Hard, Soft or NA.

[0225] As described above, the unit in the frequency direction may be a subcarrier, an RB, an RBG, etc., and the unit in the time direction may be a symbol, a symbol group, etc.

[0226] exist Fig.11 In the example shown, a cycle of three units in the time domain is set, and the same type of TF resource is repeatedly set according to the three units.

[0227] (3.3.2.1) Example 2-1 of the action according to option 2-1

[0228] In the case of option 2-1, the following options may be further set to indicate a collection of TF resources.

[0229] (Option 2-1-1): The frequency domain and the time domain of the TF resource are shown separately.

[0230] (Option 2-1-2): A bitmap corresponding to a TF resource is shown.

[0231] Action Example 1-1 may be reused to indicate resources in the frequency domain. Resources in the time domain may be indicated by any of the following.

[0232] (Alt. 1): Bitmap-based indication (“0” or “1” can mean that the time resource of this bit number is included in the set).

[0233] (Alt. 2): The same type of resources indicates the number of consecutive symbols, symbol groups, or time slots, or the starting symbol, symbol group, or time slot of the same type of resources and the number of consecutive symbols, symbol groups, or time slots.

[0234] Fig.12 An example of indicating DU resources related to action example 2-1 (option 2-1-1) is shown. Fig.12 As shown, in the case of Alt.1, for example, "1" may mean that the time resource is included in the set of TF resources (refer to the circled portion in the figure).

[0235] Specifically, regarding the frequency domain, as described above, the operation example 1-1 may be followed. In addition, regarding the time domain, it may be shown as "110", and the resource type corresponding to "1" may be associated with Hard.

[0236] In the case of Alt.2, as in Alt.1, regarding the frequency domain, the operation example 1-1 can be followed. Also, regarding the time domain, the same type of starting time slot (#1) and the number of consecutive time slots (2) can be shown.

[0237] In addition, in the case of option 2-1-2, a bit of "0" or "1" constituting the bitmap may mean that the TF resource is included in the set. The first bit may correspond to the first resource, and the second and subsequent bits may correspond to the second and subsequent resources in sequence.

[0238] In addition, the indication order of TF resources can be any of the following.

[0239] (Alt. 1): The time domain is shown first, followed by the frequency domain.

[0240] (Alt. 2): The frequency domain is shown first, followed by the time domain.

[0241] Fig.13A and Fig. 13B An example of indicating DU resources related to action example 2-1 (option 2-1-2) is shown. Specifically, Fig.13A An example of indicating TF resources according to Alt.1 is shown. Fig. 13B An indication example of TF resources according to Alt.2 is shown.

[0242] exist Fig.13A and Fig. 13B In the example, “1” may mean that the time resource is included in the set of TF resources.

[0243] exist Fig.13A , the bitmap shows "100110001", first showing the time domain and then the frequency domain. Fig.13A This shows an example in which TF resources #1, 4, 5, and 9 are set to Hard.

[0244] In addition, Fig. 13B , the bitmap shows "11001000", first showing the frequency domain and then the time domain. Fig. 13B This shows an example in which TF resources #1, 2, 5, and 9 are set to Hard.

[0245] In addition, Fig.13A (Alt.1) and Fig. 13B In either case of (Alt.2), the position of the TF resource set to Hard is the same.

[0246] (3.3.2.2) Example 2-2 of the action according to option 2-2

[0247] In the case of option 2-2, the following options may be further set to show the timing of TF resources.

[0248] (Option 2-2-1): Show the time domain first, then the frequency domain.

[0249] (Option 2-2-2): Show the frequency domain first, then the time domain.

[0250] Fig.14A An example of indicating DU resources related to action example 2-2 (option 2-2-1) is shown. Fig.14AB shows an indication example of DU resources related to action example 2-2 (option 2-2-2).

[0251] exist Fig.14A , the timing of TF resources is shown as “H, S, NA, H, H, S, NA, S, H”, first showing the time domain and then the frequency domain. Fig.14A This shows an example in which TF resources #1, 4, 5, and 9 are set to Hard.

[0252] In addition, Fig. 14B , the timing of TF resources is shown as “H, H, NA, S, H, S, NA, S, H”, first showing the frequency domain and then the time domain. Fig. 14B This shows an example in which TF resources #1, 2, 5, and 9 are set to Hard.

[0253] In addition, Fig.14A (Option 2-2-1) and Fig. 14B In either of (option 2-2-2), the position of the TF resource set to Hard is the same.

[0254] (3.3.3) Action Example 3

[0255] In option 1 or option 2, when the granularity in the frequency domain is RBG, the number of RBs contained in each RB group (RBG size) can be predefined as the 3GPP specification, or can be set by CU 50 (it can also be the same as the RBG setting related to resource allocation in 3GPP TS38.214).

[0256] In the case of being predefined as a specification of 3GPP, the RBG size may be different for each RBG according to the number of RBs included in the DU transmission band, and may also be commonly applied to multiple RBGs.

[0257] Table 3 shows a setting example of the DU transmission band and the RBG size related to Operation Example 3.

[0258] [Table 3]

[0259] <![CDATA[Transmitted bandwidth N RB > Predefined values ​​for RBG size X1 Y1 X2 Y2

[0260] "Send bandwidth NRB (N RB "Predefined value of transmission bandwidth" is the number of RBs included in the DU transmission band. "Predefined value of RBG size" is the predefined RGB size. The values ​​of X1, X2, Y1, and Y2 can be arbitrary. In addition, Y1 and Y2 can be the same value or different.

[0261] In addition, when the setting is performed by the CU 50, the set value may be any of the following.

[0262] (Alt.1): Directly set the number of RBs contained in each RBG.

[0263] (Alt.2): Set the value mapped to the predefined RGB size.

[0264] In this case, as described above, the predefined RGB size may be different for each RBG according to the number of RBs included in the DU transmission band, or may be commonly applied to a plurality of RBGs.

[0265] Table 4 shows another example of setting the DU transmission band and RBG size related to Operation Example 3.

[0266] [Table 4]

[0267]

[0268] As shown in Table 4, for example, in "configuration 1", in N RB In the case of X1, the RBG size is Y1. Y1, Y2, Y3, and Y4 are predefined RGB sizes. Y1 and Y2 can be the same value or different. Similarly, Y3 and Y4 can be the same value or different.

[0269] ((3.3.4) Action Example 4

[0270] In the case of option 1-1 or option 2-1, a resource type (Hard, Soft, or NA) applied as a default may be predefined for use in a case where the resource type of a part of frequency resources or TF resources is not set.

[0271] Fig.15 An indication example of DU resources related to action example 4 is shown. Fig.15 An example is shown in which the default resource type is predefined as Hard.

[0272] like Fig.15 As shown, in the case of option 1-1, set #1 consisting of RB#1, 2, and 3 is set to Hard, and set #2 consisting of RB#4, 5, and 6 is set to Soft.

[0273] In addition, Fig.15 In the example, the resource type of RB#7, 8, 9, and 10 is not set. The resource type applied to RB#7, 8, 9, and 10 follows the default resource type (Hard).

[0274] ((3.3.5) Action Example 5

[0275] In the above-mentioned operation examples 1 to 4, only two resource types among the types of DU resources (specifically, Hard, Soft, or NA) may be supported.

[0276] For example, for each DU serving cell, the frequency resource can be set to only Hard or Soft.

[0277] When the corresponding resource is semi-statically configured so as not to be usable in the DU, the CU 50 can avoid configuring the DU resource as the resource by configuring as shown in Tables 1 and 2, thereby assuming that NA is unnecessary. It should be noted that this operation example is applicable based on such a premise.

[0278] In addition, the type of frequency resources not only supports Hard or Soft, but can also support only Hard or NA, or only Soft or NA.

[0279] Furthermore, the resource type set in this way may be explicitly included in the indication of the DU resource, or may not be explicitly included in the indication of the DU resource.

[0280] Without being explicitly included in the indication of DU resources, the default resource category applied to frequency resources may be predefined as a 3GPP specification.

[0281] For example, only Hard or Soft may be supported, and it may be predefined that the indicated resource type is Soft, and the resource types other than Hard that are not indicated are Hard. In this case, explicit indication (designation) of the resource type is not required.

[0282] Fig.16 An indication example of DU resources related to action example 5 is shown. Fig.16 An example is shown in which only Hard or Soft is supported.

[0283] Fig.16 In the example shown, according to option 1-1, the frequency resources of RB#4, 5, and 6 are included in the set, and the RB is set to Soft. Here, it can be predefined that the type of the specified frequency resource is Soft. In addition, the type of the frequency resource may not be explicitly indicated.

[0284] (4) Function / Effect

[0285] According to the above-mentioned embodiment, the following effects can be obtained. Specifically, the wireless communication node 100B (IAB node) can receive resource information "indicating the type (H / S / NA) of the DU resource allocated to the wireless link set via the function of the DU facing the lower node (UE 200 or subnode)". In addition, the wireless communication node 100B can set the wireless link (sublink) according to the resource information. In addition, the resource information can indicate the type of time resource in the time direction and the type of frequency resource in the frequency direction.

[0286] Therefore, even when the IAB node performs simultaneous transmission and reception between the MT and the DU using FDM, the IAB node can determine whether the DU resources, specifically, the frequency resources, can be used for simultaneous transmission and reception with the MT using FDM. Thus, the IAB node can perform appropriate simultaneous transmission and reception between the MT and the DU using FDM.

[0287] In this embodiment, the wireless communication node 100B can receive resource information indicating frequency resources based on RB / RBG. Therefore, the wireless communication node 100B can quickly determine the type of frequency resources based on RB or RBG.

[0288] In this embodiment, the wireless communication node 100B can receive resource information indicating the type of time resource for each unit (symbol, etc.) in the time direction and the type of frequency resource for each unit (RB, etc.) in the frequency direction. Therefore, the wireless communication node 100B can quickly and reliably determine the type of time resource and the type of frequency resource.

[0289] In this embodiment, the wireless communication node 100B can receive resource information "indicating the type of resources allocated to the wireless link (sub-link) between the lower node" from the network. In this case, the resource information can indicate the type of resources for each combination of the position in the time direction (symbol position, etc.) and the position in the frequency direction (RB Index, etc.).

[0290] Furthermore, the wireless communication node 100B can receive resource information that “collectively indicates a plurality of resources of the same type that are continuous in the time direction or the frequency direction”.

[0291] Furthermore, the wireless communication node 100B can also receive resource information “indicating the type of resource for each combination specified by the unit in the time direction and the unit in the frequency direction”.

[0292] Therefore, the network can efficiently and reliably inform the wireless communication node 100B of the types of time resources and frequency resources that the wireless communication node 100B can use.

[0293] (5) Other Implementation Methods

[0294] Although the embodiments have been described above, the present invention is not limited to the description of the embodiments, and it is obvious that various modifications and improvements can be made by those skilled in the art.

[0295] For example, in the above-mentioned embodiments, the names of parent node, IAB node and child node are used, but as long as the structure of the wireless communication node is adopted by integrating the wireless backhaul between wireless communication nodes such as gNB and the wireless access with the terminal, the name may be different. For example, it may be simply called the first node, the second node, etc., or it may be called an upper node, a lower node, a relay node, an intermediate node, etc.

[0296] In addition, a wireless communication node may be simply referred to as a communication device or a communication node, and may also be replaced by a wireless base station.

[0297] In the above-mentioned embodiments, the terms downlink (DL) and uplink (UL) are used, but other terms may be used. For example, the terms forward link, reverse link, access link, backhaul, etc. may be substituted or associated. Alternatively, only terms such as first link, second link, first direction, second direction, etc. may be used.

[0298] In addition, the block diagram ( Figure 3 , 4 ) shows blocks in units of functions. These functional blocks (structural parts) are implemented by any combination of at least one of hardware and software. In addition, there is no particular limitation on the implementation method of each functional block. That is, each functional block can be implemented using a device that is physically or logically combined, or two or more physically or logically separated devices can be directly or indirectly connected (for example, using wires, wirelessly, etc.) and implemented using these multiple devices. The functional block can also be implemented by combining software with the above-mentioned one device or the above-mentioned multiple devices.

[0299] Functionally, it includes judging, determining, judging, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but is not limited to these. For example, the functional block (structural part) that enables the sending function is called a transmitting unit or a transmitter. In short, as mentioned above, there is no particular limitation on the implementation method.

[0300] Furthermore, the above-mentioned CU 50 , wireless communication nodes 100A to 100C, and UE 200 (the device) may also function as a computer that performs the processing of the wireless communication method of the present disclosure. Fig.17 FIG. 1 is a diagram showing an example of the hardware structure of the device. Fig.17 As shown, the device may also be configured as a computer device including a processor 1001, a memory 1002 (memory), a storage 1003 (storage), a communication device 1004, an input device 1005, an output device 1006, and a bus 1007.

[0301] In the following description, the word "device" may be replaced by "circuit", "device", "unit", etc. The hardware structure of the device may include one or more of the devices shown in the figure, or may exclude some of the devices.

[0302] Each functional block of the device (refer to Figure 3 , 4 ) is implemented by any hardware element or combination of hardware elements of the computer device.

[0303] In addition, each function in the device is implemented by the following method: predetermined software (program) is read into hardware such as processor 1001 and memory 1002, so that processor 1001 performs calculations and controls the communication of communication device 1004 or controls at least one of the reading and writing of data in memory 1002 and storage 1003.

[0304] The processor 1001 controls the entire computer by, for example, executing an operating system. The processor 1001 may be constituted by a central processing unit (CPU) including an interface with peripheral devices, a control device, a calculation device, a register, and the like.

[0305] In addition, the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the memory 1003 and the communication device 1004 to the memory 1002, and performs various processes accordingly. As a program, a program that causes a computer to perform at least a part of the actions described in the above-mentioned embodiments is used. In addition, with respect to the above-mentioned various processes, although it is described that the above-mentioned various processes are performed by one processor 1001, the above-mentioned various processes can also be performed simultaneously or sequentially by more than two processors 1001. The processor 1001 can also be installed by more than one chip. In addition, the program can also be sent from the network via a telecommunication line.

[0306] The memory 1002 is a computer-readable recording medium, and may be composed of at least one of a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), etc. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 may store a program (program code), a software module, etc. that can execute a method according to an embodiment of the present disclosure.

[0307] The memory 1003 is a computer-readable recording medium, and may be composed of at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a floppy disk, a magneto-optical disk (e.g., a compressed disk, a digital versatile disk, a Blu-ray (registered trademark) disk, a smart card, a flash memory (e.g., a card, a stick, a key drive), a Floppy (registered trademark) disk, a magnetic strip, etc. The memory 1003 may also be referred to as an auxiliary storage device. The above-mentioned recording medium may be, for example, a database, a server, and other appropriate media that includes at least one of the memory 1002 and the memory 1003.

[0308] The communication device 1004 is hardware (transceiver) used to communicate between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, etc.

[0309] The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., for example, in order to realize at least one of frequency division duplex (FDD) and time division duplex (TDD).

[0310] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that implements output to the outside (e.g., a display, a speaker, an LED light, etc.). In addition, the input device 1005 and the output device 1006 may also be integrally formed (e.g., a touch panel).

[0311] In addition, the processor 1001 and the memory 1002 and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured using a single bus or may be configured using different buses for each device.

[0312] 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), a field programmable gate array (FPGA), and the like, and may implement a part or all of each functional block through the hardware. For example, the processor 1001 may also be implemented using at least one of these hardware.

[0313] In addition, the notification of information is not limited to the form / implementation method described in the present disclosure, and other methods may also be used. For example, the notification of information may be implemented through physical layer signaling (e.g., downlink control information (DCI: Downlink Control Information), uplink control information (UCI: Uplink Control Information), high-layer signaling (e.g., RRC signaling, medium access control (MAC: Medium Access Control) signaling, broadcast information (Master Information Block (MIB: Master Information Block), System Information Block (SIB: System Information Block)), other signals or a combination thereof. In addition, RRC signaling may also be referred to as an RRC message, such as an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.

[0314] Each form / embodiment described in the present disclosure may also be applied to at least one of LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), Future Radio Access (FRA), New Radio (NR), W-CDMA (registered trademark), GSM (registered trademark), CDMA 2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), systems using other appropriate systems, and next generation systems extended therefrom. In addition, a combination of a plurality of systems (for example, a combination of at least one of LTE and LTE-A with 5G, etc.) may also be applied.

[0315] The processing procedures, timings, processes, etc. of each form / implementation described in this disclosure may be changed in order without contradiction. For example, for the method described in this disclosure, the elements of various steps are presented in an illustrative order, but are not limited to the specific order presented.

[0316] In the present disclosure, specific actions performed by a base station are sometimes performed by its upper node depending on the situation. In a network consisting of one or more network nodes having a base station, various actions performed to communicate with a terminal can be performed by at least one of the base station and other network nodes other than the base station (for example, consider MME or S-GW, etc., but not limited to this). In the above, the case where there is one other network node other than the base station is illustrated, but the other network node may also be a combination of multiple other network nodes (for example, MME and S-GW).

[0317] Information, signals (information, etc.) can be output from a higher layer (or lower layer) to a lower layer (or higher layer), and can also be input or output via multiple network nodes.

[0318] The input or output information can be stored in a specific location (e.g., memory) or managed using a management table. The input or output information can be rewritten, updated, or appended. The output information can also be deleted. The input information can also be sent to other devices.

[0319] The determination may be made by a value represented by one bit (0 or 1), by a Boolean value (Boolean: true or false), or by comparison of numerical values ​​(for example, comparison with a predetermined value).

[0320] Each form / implementation described in the present disclosure may be used alone or in combination, and may be switched according to execution. In addition, notification of scheduled information is not limited to being performed explicitly (e.g., notification of "yes X"), but may also be performed implicitly (e.g., notification of the scheduled information is not performed).

[0321] Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by other names, shall be interpreted broadly to refer to commands, sets of commands, codes, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0322] In addition, software, commands, information, etc. may be sent and received via a transmission medium. For example, when software is sent from a website, server, or other remote source using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired technology and wireless technology is included in the definition of transmission medium.

[0323] The information, signals, etc. described in the present disclosure may also be represented by any of a variety of different technologies. For example, the data, commands, instructions, information, signals, bits, symbols, chips, etc. that may be involved in the above description as a whole may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination of these.

[0324] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may also be a signal (signaling). In addition, a signal may also be a message. In addition, a component carrier (CC) may be referred to as a carrier frequency, a cell, a frequency carrier, etc.

[0325] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0326] In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values ​​to predetermined values, or other corresponding information. For example, wireless resources may also be indicated by indexes.

[0327] The names used for the above parameters are non-restrictive in any respect. Furthermore, the formulas etc. using these parameters may sometimes differ from those explicitly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by appropriate names, and therefore the various names assigned to these various channels and information elements are non-restrictive in any respect.

[0328] 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 are used interchangeably. Sometimes, the base station is also referred to as macro cell, small cell, femto cell, pico cell and the like.

[0329] A base station can accommodate one or more (e.g., 3) 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, each of which can also provide communication services through a base station subsystem (e.g., a small base station for indoor use (Remote Radio Head: RRH).

[0330] The terms "cell" or "sector" refer to a part or the entirety of a coverage area of ​​at least one of a base station and a base station subsystem that provide communication services within the coverage area.

[0331] In the present disclosure, terms such as “mobile station (MS)”, “user terminal (user terminal)”, “user equipment (UE)”, and “terminal” may be used interchangeably.

[0332] For mobile stations, those skilled in the art sometimes also use the following terms: 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 appropriate terms.

[0333] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a communication device, etc. In addition, at least one of the base station and the mobile station may be a device mounted on a mobile body, the mobile body itself, etc. The mobile body may be a means of transportation (e.g., a car, an airplane, etc.), a mobile body that moves in an unmanned manner (e.g., a drone, an autonomous vehicle, etc.), or 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 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.

[0334] In addition, the base station in the present disclosure may also be replaced by a mobile station (user terminal, the same below). For example, various forms / implementations of the present disclosure may also be applied to a structure in which the communication between a base station and a mobile station is replaced by communication between multiple mobile stations (for example, may also be referred to as device-to-device (D2D: Device-to-Device), vehicle-to-everything system (V2X: Vehicle-to-Everything), etc.). In this case, it is also possible to set a structure in which the mobile station has the functions of the base station. In addition, terms such as "uplink" and "downlink" may also be replaced by terms corresponding to terminal-to-terminal communication (for example, "side"). For example, uplink channels, downlink channels, etc. may also be replaced by side channels.

[0335] Likewise, the mobile station in the present disclosure may be replaced by a base station. In this case, the base station may have the same functions as the mobile station.

[0336] A radio frame may be composed of one or more frames in the time domain. In the time domain, one or more frames may be referred to as subframes. A subframe may be further composed of one or more time slots in the time domain. A subframe may also be a fixed time length (e.g., 1 ms) that is not dependent on a numerology.

[0337] A parameter set may be a communication parameter applied to at least one of the transmission and reception of a certain signal or channel. The parameter set may, for example, represent at least one of a subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, a radio frame structure, a specific filtering process performed by a transceiver in the frequency domain, a specific windowing process performed by a transceiver in the time domain, and the like.

[0338] A slot may be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.) in the time domain. A slot may be a time unit based on a parameter set.

[0339] A time slot may contain multiple mini-slots. Each mini-slot may be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may be composed of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in units of time greater than a mini-slot may be referred to as a PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may be referred to as a PDSCH (or PUSCH) mapping type B.

[0340] A radio frame, a subframe, a time slot, a mini-time slot, and a symbol all represent time units for transmitting signals. A radio frame, a subframe, a time slot, a mini-time slot, and a symbol may be referred to by other corresponding names.

[0341] For example, one subframe may also be referred to as a transmission time interval (TTI), multiple consecutive subframes may also be referred to as a TTI, and one time slot or one mini time slot may also be referred to as a TTI. That is, at least one of a subframe and a TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (e.g., 1-13 symbols), or a period longer than 1ms. In addition, the unit representing a TTI may not be referred to as a subframe, but may be referred to as a time slot, a mini time slot, or the like.

[0342] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station schedules the allocation of wireless resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) to each user terminal in units of TTI. In addition, the definition of TTI is not limited to this.

[0343] TTI can be a transmission time unit for data packets (transport blocks), code blocks, code words, etc. after channel coding, and can also be a processing unit for scheduling, link adaptation, etc. In addition, when TTI is given, the time interval (e.g., the number of symbols) to which the transport block, code block, code word, etc. is actually mapped can be shorter than the TTI.

[0344] In addition, when 1 time slot or 1 mini time slot is called TTI, more than one TTI (i.e., more than one time slot or more than one mini time slot) can constitute the minimum time unit of scheduling. In addition, the number of time slots (number of mini time slots) constituting the minimum time unit of scheduling can be controlled.

[0345] A TTI having a time length of 1 ms may also be referred to as a normal TTI (TTI in LTE Rel.8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may be referred to as a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini-time slot, a sub-time slot, a time slot, etc.

[0346] In addition, for a long TTI (for example, a normal TTI, a subframe, etc.), it can be replaced with a TTI having a time length exceeding 1ms, and for a short TTI (for example, a shortened TTI, etc.), it can be replaced with a TTI length that is smaller than the long TTI (longTTI) and has a TTI length of more than 1ms.

[0347] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain. In the frequency domain, it may contain one or more consecutive subcarriers. The number of subcarriers contained in an RB may be the same regardless of the parameter set, for example, it may be 12. The number of subcarriers contained in an RB may also be determined according to the parameter set.

[0348] In addition, the time domain of an RB may include one or more symbols, and may be the length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI. 1 TTI, 1 subframe, etc. may be composed of one or more resource blocks, respectively.

[0349] In addition, one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, and the like.

[0350] In addition, a resource block may be composed of one or more resource elements (RE). For example, 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.

[0351] A bandwidth part (BWP) (also referred to as a partial bandwidth, etc.) may represent a subset of contiguous common resource blocks (RBs) for a parameter set in a carrier. Here, the common RBs may be identified by the index of the RBs relative to the common reference point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0352] 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.

[0353] At least one of the set BWPs may be active, and it is not assumed that the UE transmits or receives a predetermined signal / channel outside the activated BWP. In addition, "cell", "carrier" and the like in the present disclosure may be replaced with "BWP".

[0354] The above structures of radio frames, subframes, time slots, mini-time slots, and symbols are only examples. For example, the number of subframes included in a radio frame, the number of time slots per subframe or radio frame, the number of mini-time slots included in a time slot, the number of symbols and RBs included in a time slot or mini-time slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP: Cyclic Prefix) length, and the like can be changed in various ways.

[0355] The terms "connected", "coupled" or all variations of these terms are intended to indicate any direct or indirect connection or combination between two or more elements, and may include the situation where there is one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be a physical combination or connection, a logical combination or connection, or a combination of these. For example, "access" may be used to replace "connection". In the context of the present disclosure, two elements may be considered to be "connected" or "coupled" to each other using at least one of one or more wires, cables, and printed electrical connections, and as some non-limiting and non-inclusive examples, electromagnetic energy having wavelengths in the wireless frequency domain, microwave region, and light (both visible and invisible) region may be used to "connect" or "couple" to each other.

[0356] The reference signal may be referred to as Reference Signal (RS) for short, or may be referred to as a pilot signal depending on the applied standard.

[0357] The phrase "according to" used in the present disclosure does not mean "only according to" unless otherwise expressly stated. In other words, the phrase "according to" means both "only according to" and "at least according to".

[0358] The “unit” in the configuration of each of the above-mentioned devices may be replaced with a “section”, “circuit”, “device” or the like.

[0359] Any reference to an element using the designations "first", "second", etc. used in this disclosure does not necessarily limit the number or order of these elements. These designations can be used as a simple method to distinguish between two or more elements in this disclosure. Therefore, a reference to a first element and a second element does not mean that only two elements can be taken or that the first element must precede the second element in any form.

[0360] When the terms "include," "including," and variations thereof are used in the present disclosure, these terms are intended to be inclusive, as is the term "comprising." Furthermore, the term "or" used in the present disclosure does not mean an exclusive or.

[0361] In the present disclosure, when an article is added by translation, such as a, an, and the in English, for example, the present disclosure may also include a case where the noun following the article is in a plural form.

[0362] The terms "determining" and "determining" used in the present disclosure sometimes also include a variety of actions. "Judgment" and "determination" may include, for example, considering matters that have been judged, calculated, calculated, processed, derived, investigated, searched (for example, searched in a table, database or other data structure), confirmed (ascertaining) as matters that have been "judged" or "determined", etc. In addition, "judgment" and "determination" may include matters that have been received (for example, receiving information), transmitted (for example, sending information), input, output, accessed (for example, accessing data in memory) as matters that have been "judged" or "determined", etc. In addition, "judgment" and "determination" may include matters that have been resolved (resolving), selected (selecting), chosen (choosing), established (establishing), compared (comparing), etc. as matters that have been "judged" or "determined". That is, "judgment" and "decision" can include matters that are considered to be "judged" and "decided". In addition, "judgment (decision)" can also be replaced by "assuming", "expecting", "considering", etc.

[0363] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other". In addition, the term may also mean "A and B are different from C, respectively". The terms "separate" and "combined" may also be interpreted in the same way as "different".

[0364] The present disclosure is described in detail above, but it should be clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented as a modification and variation without departing from the subject matter and scope of the present disclosure as determined by the claims. Therefore, the purpose of the description of the present disclosure is to illustrate and not to have any limiting meaning on the present disclosure.

[0365] Description of symbols

[0366] 10: Wireless communication system;

[0367] 50: CU;

[0368] 100A, 100B, 100C: wireless communication nodes;

[0369] 110: wireless transmission unit;

[0370] 120: wireless receiving unit;

[0371] 130: NW IF Department;

[0372] 140: IAB node connection part;

[0373] 150: Control Department;

[0374] 161: wireless transmission unit;

[0375] 162: wireless receiving unit;

[0376] 170: upper node connection part;

[0377] 180: lower node connection part;

[0378] 190;Control Department;

[0379] UE: 200;

[0380] 1001: processor;

[0381] 1002: Memory;

[0382] 1003: memory;

[0383] 1004: Communication device;

[0384] 1005: input device;

[0385] 1006: output device;

[0386] 1007: Bus.

Claims

1. A wireless communication node, comprising: a receiving unit that receives resource information indicating the type of resources allocated to a wireless link with a lower node from a network; and a control unit, which sets the wireless link according to the resource information, The receiving unit receives the resource information indicating the type of time resources in the time domain and the type of frequency resources in the frequency domain. The control unit determines a cycle for applying “transmission based on the resource information” according to an instruction from the central unit.

2. The wireless communication node according to claim 1, wherein: The receiving unit receives the resource information indicating the frequency resource based on a resource block.

3. The wireless communication node according to claim 1, wherein: The control unit determines the period based on signaling that complies with the F1 application protocol.

4. The wireless communication node according to claim 1, wherein: The control unit determines the size of the time resource based on signaling that complies with the F1 application protocol.

5. A wireless communication method in a wireless communication node, comprising the following steps: receiving resource information indicating the type of resources allocated to a wireless link with a lower node from a network; and According to the resource information, setting the wireless link, In the step of performing the receiving, the resource information “showing the type of time resources in the time domain and the type of frequency resources in the frequency domain” is received, In the step of performing the setting, a cycle for applying “transmission based on the resource information” is determined according to an instruction from the central unit.

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