Wireless communication nodes

Abstract

A wireless communication node (100B) receives configuration information from a network, the configuration information indicating whether simultaneous transmission and reception based on frequency division multiplexing is possible in a first wireless link between a higher-level node and a second wireless link between a lower-level node. The wireless communication node (100B) configures the first wireless link and the second wireless link based on the configuration information.

Description

Technical Field

[0001] The present disclosure relates to a wireless communication node for setting up wireless access and wireless backhaul. Background Art

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

[0003] For example, in the NR radio access network (RAN), integrated access and backhaul (IAB) is defined, which integrates "radio access for terminals (User Equipment: UE)" and "radio backhaul between wireless communication nodes such as radio base stations (gNBs)" (see non-patent document 1).

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

[0005] 3GPP Release 17 plans to support simultaneous transmission and reception using frequency division multiplexing (FDM) in the radio link (Link_parent) between the parent node and the IAB node (i.e., MT) and the radio link (Link_child) between the IAB node and the child node (i.e., DU).

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

[0010] Therefore, the following disclosure has been made in view of the above circumstances, and an object of the disclosure is to provide a wireless communication node that can perform appropriate simultaneous transmission and reception using FDM between an MT and a DU.

[0011] One embodiment of the present disclosure provides a wireless communication node (wireless communication node 100B), which has: a receiving unit (wireless transmitting unit 161), which receives setting information from a network, the setting information indicating whether simultaneous transmission and reception based on frequency division multiplexing can be performed in a first wireless link between an upper node and a second wireless link between a lower node; and a control unit (control unit 190), which sets the first wireless link and the second wireless link according to the setting information.

[0012] One embodiment of the present disclosure provides a wireless communication node (wireless communication node 100B), which has: a receiving unit (wireless transmitting unit 161), which receives resource information from a network, wherein the resource information indicates the types of time resources and frequency resources allocated to a first wireless link with an upper node and a second wireless link with a lower node; and a control unit (control unit 190), which, when indicating that both the type of the time resource and the type of the frequency resource can be used as the second wireless link, uses the time resource and the frequency resource to perform simultaneous transmission and reception based on frequency division multiplexing in the first wireless link and the second wireless link. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0015] Figure 3 FIG. 1 is a functional block diagram of the wireless communication node 100A.

[0016] Figure 4 FIG. 1 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 serving cell and an MT serving cell based on scenario 1.

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

[0019] Figure 5C This is a diagram showing an example of usage of frequency resources of a DU serving cell and an MT serving 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 an IAB node.

[0021] Figure 7A This is a diagram showing an example of indicating DU resources according to a modification example (Alt. 1) of operation example 2.

[0022] Figure 7B This is a diagram showing an example of indicating DU resources according to a modification example (Alt. 2) of operation example 2.

[0023] Figure 8 100 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

[0024] Hereinafter, the embodiment will be described with reference to the drawings. In addition, the same or similar reference numerals are given to the same functions and structures, and their description will be omitted as appropriate.

[0025] (1) Overall schematic structure of wireless communication system

[0026] Figure 1 1 is a diagram schematically illustrating the overall configuration of a wireless communication system 10 according to this embodiment. The wireless communication system 10 is a wireless communication system compliant with 5G New Radio (NR), and is composed of a plurality of wireless communication nodes and terminals.

[0027] Specifically, the wireless communication system 10 includes wireless communication nodes 100A, 100B, and 100C, and a user terminal 200 (hereinafter referred to as UE 200 ).

[0028] The wireless communication nodes 100A, 100B, and 100C are capable of establishing wireless access with the UE 200 and establishing a wireless backhaul (BH) between the wireless communication nodes. Specifically, a backhaul (transmission path) based on a wireless link is established 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.

[0029] Thus, a structure in which "radio access to the UE 200" and "radio backhaul between the radio communication nodes" are integrated is called Integrated Access and Backhaul (IAB).

[0030] IAB reuses existing functions and interfaces defined for radio access. Specifically, 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), along with corresponding interfaces such as NR Uu (between MT and gNB / DU), F1, NG, X2, and N4, are used as a baseline.

[0031] Wireless communication node 100A is connected to the NR radio access network (NG-RAN) and core network (Next Generation Core (NGC) or 5GC) via a wired transmission path such as optical fiber. The NG-RAN / NGC includes a central unit (CU 50) 50 (hereinafter referred to as CU 50), which serves as a communication node. The NG-RAN and NGC can be simply referred to as "network," including them.

[0032] In addition, CU 50 may be composed of any one or a combination of the above-mentioned UPF, AMF, and SMF. Alternatively, CU 50 may be a gNB-CU as described above.

[0033] Figure 2 : is a diagram showing an example of the basic structure of IAB. Figure 2As 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.

[0034] In addition, in the relationship with the IAB node, the parent node can be called the upper node. In addition, the parent node can also be called the IAB donor. In addition, in the relationship with the parent node, the IAB node can be called the lower node.

[0035] The child node in IAB is composed of Figure 1 Alternatively, UE 200 may constitute a child node. In relation to the child node, the IAB node may be referred to as an upper node, and in relation to the IAB node, the child node may be referred to as a lower node.

[0036] A wireless link is established between the parent node and the IAB node. Specifically, a wireless link called Link_parent is established.

[0037] A wireless link is established between the IAB node and the child node. Specifically, a wireless link called Link_child is established.

[0038] This wireless link established between wireless communication nodes can be called a wireless backhaul link. Link_parent consists of the downlink "DL Parent Backhaul (DL Parent BH)" and the uplink "UL Parent Backhaul (UL Parent BH)". Link_child consists of the downlink "DL Child Backhaul (DL Child BH)" and the uplink "UL Child Backhaul (UL Child BH).

[0039] In addition, the radio link established between the UE 200 and the IAB node or parent node is called a radio access link. Specifically, the radio link is composed of a downlink DL Access and an uplink UL Access.

[0040] The IAB node has a function for connecting to the parent node, namely the mobile terminal (MT) and a function for connecting to the child node (or UE 200), namely the distributed unit (DU). Figure 2 , but parent and child nodes also have MT and DU.

[0041] Among the radio resources used by the DU, downlink (DL), uplink (UL), and flexible time-resource (D / U / F) are classified as "Hard," "Soft," or "Not Available" (H / S / NA) from the DU's perspective. Furthermore, "Soft (S)" also specifies whether it is available or not available.

[0042] Flexible time resources (F) are time resources that can be used in either the DL or UL. Furthermore, "Hard" means that the corresponding time resource can always be used as a radio resource for a DU child link connected to a child node or UE, while "Soft" means that the availability of the corresponding time resource as a radio resource (DU resource) for a DU child link is explicitly or implicitly controlled by the parent node.

[0043] In addition, in the case of Soft(S), the wireless resources to be notified can be determined based on IA or INA.

[0044] "IA" indicates that the DU resource can be used, either explicitly or implicitly. In addition, "INA" indicates that the DU resource cannot be used, either explicitly or implicitly.

[0045] in addition, Figure 2 The example IAB structure shown utilizes CU / DU splitting, but the IAB structure is not necessarily limited to this. For example, in wireless backhaul, the IAB can be constructed using a tunnel using the GPRS Tunneling Protocol (GTP)-U / User Datagram Protocol (UDP) / Internet Protocol (IP).

[0046] 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, including outdoor small cell configuration, indoor and mobile relay equipment support (for example, in buses and trains).

[0047] In addition, if Figure 1 and Figure 2As shown, IAB can support deployment based on standalone (SA) only NR, or deployment based on non-standalone (NSA) including other RATs (LTE, etc.).

[0048] In this embodiment, the wireless access and wireless backhaul can be half-duplex or full-duplex. In addition, the multiplexing method can use time division multiplexing (TDM), space division multiplexing (SDM), and frequency division multiplexing (FDM).

[0049] When the IAB node operates in half-duplex communication, the DL Parent BH is the receive (RX) side, the UL Parent BH is the transmit (TX) side, the DL Child BH is the transmit (TX) side, and the UL Child BH is the receive (RX) side. Furthermore, in time division duplex (TDD), the DL / UL configuration mode in the IAB node is not limited to DL-F-UL; configuration modes such as UL-F-DL can be applied only to the wireless backhaul (BH).

[0050] Furthermore, in this embodiment, SDM / FDM is used to achieve simultaneous operation of the DU and MT of the IAB node.

[0051] (2) Functional block structure of wireless communication system

[0052] 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.

[0053] (2.1) Wireless Communication Node 100A

[0054] 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 .

[0055] The wireless transmitter 110 transmits a wireless signal conforming to the 5G standard. Furthermore, the wireless receiver 120 transmits a wireless signal conforming to the 5G standard. In this embodiment, the wireless transmitter 110 and the wireless receiver 120 perform wireless communication with the wireless communication node 100B constituting the IAB node.

[0056] In this embodiment, the wireless communication node 100A has the functions of an MT and a DU, and the wireless transmission unit 110 and the wireless reception unit 120 transmit and receive wireless signals corresponding to the MT / DU.

[0057] The wireless transmitter 110 and the wireless receiver 120 can perform wireless communication in accordance with half-duplex and full-duplex. In addition, the wireless transmitter 110 and the wireless receiver 120 are not limited to TDM (TDD) and can also perform wireless communication in accordance with FDM and SDM.

[0058] The NW IF unit 130 provides a communication interface for connecting to the NGC side, etc. For example, the NW IF unit 130 may include interfaces such as X2, Xn, N2, and N3.

[0059] The IAB node connection unit 140 provides an interface for connecting to an IAB node (or a child node including a UE). Specifically, the IAB node connection unit 140 provides the functionality of a distributed unit (DU). In other words, the IAB node connection unit 140 is used to connect to an IAB node (or a child node).

[0060] In addition, an IAB node can be described as a RAN node that supports wireless access for UE 200 and backhauls access services wirelessly. In addition, a parent node (i.e., an IAB donor) can be described as a RAN node that provides an interface between the UE and the core network and a wireless backhaul function for the IAB node.

[0061] The control unit 150 controls each functional block constituting the wireless communication node 100A. In particular, in this embodiment, the control unit 150 controls the setting of a wireless link between IAB nodes (wireless communication nodes 100B).

[0062] Specifically, the control unit 150 can determine DU resources (which may also be referred to as radio resources) to be allocated to the radio link established via the DU function for the IAB node.

[0063] The resources may include time resources in the time direction and frequency resources in the frequency direction.

[0064] Time resources refer to resources in the time direction and can be expressed in units of symbols, time slots, or subframes. Furthermore, the time direction can be referred to as the time domain, symbol period, or symbol time. Furthermore, a symbol can be referred to as an Orthogonal Frequency Division Multiplexing (OFDM) symbol.

[0065] Frequency resources refer to resources in the frequency direction and can be represented by resource blocks, resource block groups, subcarriers, etc. The frequency direction can also be referred to as frequency domain, resource blocks, resource block groups, subcarriers, BWP (Bandwidth part), etc.

[0066] (2.2) Wireless Communication Node 100B

[0067] Figure 4 FIG. 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 .

[0068] Thus, the wireless communication node 100B has functional blocks similar to those of the wireless communication node 100A (parent node) described above, but differs in having an upper node connection unit 170 and a lower node connection unit 180 , and in the function of the control unit 190 .

[0069] The wireless transmission unit 161 transmits wireless signals compliant with the 5G standard. Furthermore, the wireless reception unit 162 transmits wireless signals compliant with the 5G standard. In this embodiment, the wireless transmission unit 161 and the wireless reception unit 162 perform wireless communications with the wireless communication node 100A constituting the parent node, and with child nodes (including the UE 200).

[0070] Similar to the wireless communication node 100A (parent node), the wireless transmission unit 161 and the wireless reception unit 162 can perform wireless communication based on half-duplex and full-duplex, and can also perform wireless communication based on FDM and SDM, not limited to TDM (TDD).

[0071] In this embodiment, wireless receiving unit 162 is capable of receiving configuration information from the network indicating whether simultaneous frequency division multiplexing (FDM) transmission and reception is permitted in a wireless link with an upper node (first wireless link (Link_parent)) and a wireless link with a lower node (second wireless link (Link_child)). In this embodiment, wireless receiving unit 162 constitutes a receiving unit.

[0072] Furthermore, the wireless reception unit 162 can receive resource information indicating the types (H / S / NA) of time resources and frequency resources allocated to the first wireless link with the upper node and the second wireless link with the lower node from the network.

[0073] Setting information and resource information can be sent from CU 50 according to the F1-AP (Application) protocol applied to the F1 interface between CU and DU, or they can be sent from the network (specifically, gNB) through signaling of the wireless resource control layer (RRC).

[0074] The wireless reception unit 162 can also receive instruction information indicating whether or not frequency bands used for simultaneous transmission and reception (FDD) in the first and second wireless links based on FDM overlap, or indicating a default operation in the simultaneous transmission and reception.

[0075] As described above, the wireless communication node 100B can perform simultaneous transmission and reception based on FDM by the MT and DU of the IAB node, that is, can perform frequency division duplexing (FDD).

[0076] Furthermore, frequency band overlap may include partial or complete overlap of the frequency bands allocated to the first radio link and the second radio link (which may alternatively be the MT serving cell and the DU serving cell). Furthermore, the default behavior for simultaneous transmission and reception may represent the default behavior when the MT and DU of the wireless communication node 100B operate according to FDM (FDD).

[0077] Furthermore, the wireless transmission unit 161 can transmit capability information (UE capability) indicating whether simultaneous transmission and reception based on FDM (FDD) is possible to the network. In this embodiment, the wireless transmission unit 161 constitutes a transmission unit.

[0078] The upper node connection unit 170 provides an interface for connecting to a node higher than the IAB node. Furthermore, an upper node refers to a wireless communication node located closer to the network side (specifically, the core network side (also referred to as the upstream side or uplink side)) than the IAB node.

[0079] Specifically, the upper node connection unit 170 provides a Mobile Termination (MT) function. In this embodiment, the upper node connection unit 170 is used to connect to the parent node constituting the upper node.

[0080] The lower node connection unit 180 provides an interface for connecting to nodes lower than the IAB node. A lower node is a wireless communication node located closer to the end user (also called downstream) than the IAB node.

[0081] Specifically, the lower node connection unit 180 provides the function of a distributed unit (DU). That is, in this 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.

[0082] The control unit 190 controls the functional blocks that comprise the wireless communication node 100B. In particular, in this embodiment, the control unit 190 can configure a first wireless link (Link_parent) with a higher-level node and a second wireless link (Link_child) with a lower-level node based on configuration information regarding simultaneous transmission and reception based on FDM received by the wireless reception unit 162.

[0083] Furthermore, the control unit 190 can set up wireless links (specifically, a first wireless link (Link_parent) and a second wireless link (Link_child)) based on resource information received from the network (which may include the CU 50).

[0084] When the type of the time resource allocated to Link_child is not Link_child-specific, the control unit 190 can set Link_child using the time resource if it is instructed that simultaneous transmission and reception of MT and DU based on FDM is possible.

[0085] In addition, when the type of time resource (H / S / NA) and the type of frequency resource (H / S / NA) indicated are both usable for Link_child, the control unit 190 can use the time resource and the frequency resource to perform simultaneous FDM-based transmission and reception in Link_parent and Link_child.

[0086] Specifically, the control unit 190 can determine the resources (DU resources) allocated to the wireless link with the lower node (specifically, UE 200) or other wireless communication nodes that constitute child nodes in the relationship with 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.

[0087] Various channels can be transmitted and received via the wireless link to which the DU resources are allocated.

[0088] Channels include control channels and data channels. Control channels include PDCCH (Physical Downlink Control Channel), PUCCH (Physical Uplink Control Channel), PRACH (Physical Random Access Channel), and PBCH (Physical Broadcast Channel).

[0089] In addition, data channels include PDSCH (Physical Downlink Shared Channel), PUSCH (Physical Uplink Shared Channel), and the like.

[0090] Reference signals include 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). Signals include channels and reference signals. Furthermore, data may refer to data transmitted via a data channel.

[0091] Uplink Control Information (UCI) is UL control information and is symmetrical to Downlink Control Information (DCI). UCI is transmitted via the PUCCH or PUSCH. UCI can include SR (Scheduling Request), HARQ (Hybrid Automatic Repeat Request) ACK / NACK, and CQI (Channel Quality Indicator).

[0092] DCI is DL control information. DCI is transmitted via PDCCH. DCI may include scheduling information for PDSCH and PUSCH, etc.

[0093] (3) Operation of wireless communication system

[0094] Next, the operation of the wireless communication system 10 will be described. Specifically, the operation related to simultaneous transmission and reception using FDM between the radio link (parent link (Link_parent)) between the IAB node (wireless communication node 100B) and the parent node (wireless communication node 100A), and the radio link (child link (Link_child)) between the IAB node (wireless communication node 100B) and the child node (UE 200 or other wireless communication node constituting the child node).

[0095] (3.1) Prerequisites

[0096] In Release 17 of 3GPP, in order to support simultaneous transmission and reception in a parent link and a child link, an extension of radio resource multiplexing is planned.

[0097] For example, expansion of simultaneous transmission and reception in the following combinations of transmission and reception directions is planned.

[0098] MT send / DU send

[0099] MT sending / DU receiving

[0100] MT receiving / DU sending

[0101] MT reception / DU reception

[0102] Furthermore, support for Dual Connectivity (DC), which allows simultaneous communication between a UE and two NG-RAN nodes, is planned. Furthermore, to support this simultaneous transmission and reception, extensions related to IAB node timing modes, DL / UL power control, cross-link interference (CLI) in wireless backhaul (BH) links, and interference measurement may be considered.

[0103] In Release 16 of 3GPP, TDM-based resource multiplexing is specified between a parent link and a child link.

[0104] Specifically, 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 symbols in each time slot.

[0105] This setting can be achieved using the F1-AP message GNB-DU RESOURCE CONFIGURATION sent from the CU 50.

[0106] In addition, when the DU resource (codeword) is Soft, dynamic indication (IA or INA) can be performed explicitly and implicitly.

[0107] 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.

[0108] The IAB node MT does not transmit or receive in this symbol (implicit indication)

[0109] Since the IAB node MT transmits or receives in this symbol, the transmission or reception in this symbol by the IAB node DU based on the use of this symbol is not changed (implicit indication)

[0110] The IAB node MT detects DCI format 2_5 (refer to 3GPP TS 38.212 Chapter 7.3), and the field value indexed by the availability indicator (AI) indicates that the code element is available (explicit indication)

[0111] Regarding DU resources in the frequency domain, CU 50 can use the Served Cell Information information element (IE) to set the frequency information and transmission bandwidth of the serving cell formed by the DU (hereinafter referred to as the DU serving cell) via F1-AP signaling. Served Cell Information can include the NR Frequency Info and Transmission Bandwidth IEs.

[0112] In addition, in 3GPP Release 16, the donor CU and 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 DU for the IAB node.

[0113] Furthermore, for the above-mentioned combinations of transmission and reception directions (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.

[0114] Regarding simultaneous transmission and reception in a parent link and a child link using resource multiplexing between the parent link and the child link based on FDM, the following assumptions 1 to 3 can be considered.

[0115] Figure 5A 、 Figure 5B as well as Figure 5C Examples of frequency resource usage of the DU serving cell and the MT serving cell based on assumptions 1 to 3 are shown.

[0116] (Assumption 1): The DU serving cell and the MT serving cell perform simultaneous transmission and reception (which may represent simultaneous transmission or simultaneous reception) using non-overlapping resources in the frequency direction.

[0117] like Figure 5A As shown, the DU transmission band does not overlap with the BWP of the MT serving cell (which can be set to the RRC layer through signaling).

[0118] In addition, the DU serving cell and the MT serving cell may refer to cells formed by the DU and MT of the IAB node, respectively.

[0119] (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.

[0120] (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.

[0121] In the case of (Assumption 1), since the bandwidths of the DU serving cell and the MT serving cell are set to non-overlap, if the IAB node's multiplexing capability supports simultaneous transmission and reception of a pair of DU and MT serving cells, simultaneous transmission and reception can be performed if the MT and DU transmission directions of the IAB node match the multiplexing capability. In this case, additional signaling for resource multiplexing in the frequency domain is not required.

[0122] 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 an 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 jointly recognize that orthogonal frequency resources are used by the MT and DU.

[0123] In view of 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 is implemented.

[0124] (3.2) Action Overview

[0125] The operation example described below enables simultaneous transmission and reception based on FDM, i.e., frequency division duplexing (FDD), by the MT and DU of the IAB node within the same frequency band (which may be simply referred to as band, frequency range, etc.).

[0126] In particular, in any case where part or all of the frequency bands used by the DU service cell and the MT service cell overlap (also called in-band) (the above-mentioned assumptions 2 and 3), or where the frequency bands used by the DU service cell and the MT service cell do not overlap (also called out-band) (the above-mentioned assumption 1), simultaneous transmission and reception based on FDM by the MT and DU are achieved.

[0127] The operation examples described below are composed of operation examples 1 to 5.

[0128] (Action Example 1): Action example related to scenario 1

[0129] (Operation Example 1-1): The CU 50 or other nodes constituting the network instructs the IAB node whether operations other than TDD of the MT and DU of the IAB node are permitted or not.

[0130] (Action Example 1-2): The MT and DU of the IAB node perform transmission and reception simultaneously.

[0131] When the DU resource is NA, any of the following options may be used.

[0132] (Option 1): DU cannot perform actions.

[0133] (Option 2): When capability information indicating that operations other than TDD of MT and DU are possible is reported, the operation is possible.

[0134] When the DU resource is Soft, when the IAB node reports capability information indicating that actions other than TDD of the MT and DU can be performed, or when the IAB node receives an indication indicating that actions other than TDD can be performed, the IAB node can perform simultaneous transmission and reception by the MT and DU.

[0135] (Action Example 2): Action example related to scenario 2

[0136] The configuration of time resources and frequency resources is performed independently, and the DU operation (simultaneous transmission and reception) is performed only when it is indicated that both resources can be used.

[0137] Regarding time resources, the mechanism of 3GPP Release 16 (hereinafter referred to as Rel-16) is reused, and Action Example 1 can be applied.

[0138] Regarding frequency resources, availability (H / S / NA) of DU resources is semi-statically or dynamically set.

[0139] For example, the IAB node may act as follows.

[0140] DU operates using a frequency band set to Hard / IA for time resources set to Hard.

[0141] DU can operate according to any of the following options for time resources set to NA.

[0142] (Alt. 1): The DU resources are not used (DU does not perform any action).

[0143] (Alt. 2): When the IAB node reports capability information indicating that operations other than TDD are possible for MT and DU, or when the IAB node receives an instruction indicating that operations other than TDD are possible, it operates using a frequency band configured with Hard / IA.

[0144] When the DU reports capability information indicating that operations other than TDD of the MT and DU are possible for a time resource set to Soft, the DU operates using a frequency band set to Hard / IA.

[0145] (Modification of Operation Example 2): Operation Example for Setting Frequency Resources for Types of Time Resources (H / S / NA)

[0146] The frequency resource setting for the time resource type (H / S / NA) can be performed according to any of the following options.

[0147] (Alt. 1): Regardless of the setting status of the time resource (H / S / NA), the type of frequency resource (H / S / NA) is set.

[0148] (Alt. 2): The type of frequency resource (H / S / NA) is set according to the setting state of the time resource (H / S / NA) (for example, only in the case of Hard).

[0149] (Action Example 3): Action example related to scenario 3

[0150] The DU can operate according to instructions from a network (which may include the CU 50 ) that sets matrices (combinations) in the time direction and the frequency direction.

[0151] Furthermore, the operation for setting resource types (H / S / NA) may follow Rel-16.

[0152] (Action Example 4): Action Example Related to IAB Node Capabilities

[0153] Regarding actions related to the capabilities of the IAB node, any of the following options may be used.

[0154] (Option 1): The IAB node reports the availability of FDM operations for the MT and DU, and whether out-band FDM and in-band FDM are supported.

[0155] (Option 2): The IAB node sets either out-band FDM or in-band FDM as default to report whether FDM is supported.

[0156] (Action Example 5): Action example related to FDM settings

[0157] Actions related to FDM settings can be based on any of the following options.

[0158] (Option 1): The CU 50 (network) sets the FDM action (out-band FDM or in-band FDM).

[0159] (Option 2): The CU 50 (network) sets the FDM action when the IAB node supports the default action of FDM (out-band FDM or in-band FDM).

[0160] (3.3) Action example

[0161] First, the overall sequence related to 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.

[0162] like Figure 6 As shown, the wireless communication node 100B (IAB node) transmits capability information (UE capability) related to FDM operation of MT and DU to the CU 50 (or other nodes constituting the network) ( S10 ).

[0163] Specifically, the wireless communication node 100B can transmit capability information indicating that it can perform operations other than TDD for MT and DU to the CU 50. More specifically, the wireless communication node 100B can transmit capability information indicating whether the wireless communication node 100B supports simultaneous transmission and reception using out-band FDM and / or in-band FDM to the CU 50. Furthermore, as described above, either out-band FDM or in-band FDM can be set as the default.

[0164] The CU 50 transmits a GNB-DU RESOURCE CONFIGURATION message including the type of DU resources of the IAB node to the wireless communication node 100B (IAB node) based on the received capability information of the IAB node ( S20 ).

[0165] GNB-DU RESOURCE CONFIGURATION is a type of F1-AP message and is specified in 3GPP TS38.473.

[0166] Upon receiving the GNB-DU RESOURCE CONFIGURATION, the wireless communication node 100B, specifically the DU of the IAB node, returns a GNB-DU RESOURCE CONFIGURATION ACKNOWLEDGE (S30) to the CU 50. GNB-DU RESOURCE CONFIGURATION and GNB-DU RESOURCE CONFIGURATION ACKNOWLEDGE are types of F1-AP messages and are specified in 3GPP TS 38.473.

[0167] The wireless communication node 100B configures the DU resource according to the type of DU resource (H / S / NA) included in the GNB-DU RESOURCE CONFIGURATION ( S40 ).

[0168] Specifically, the wireless communication node 100B determines the time resources and frequency resources to be allocated to the child link (Link_child) based on the type of DU resources (H / S / NA). In addition, the child link can be called a DU serving cell as described above.

[0169] 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) (S50). As described above, in this operation example, transmission and reception based on FDM (ie, FDD) are performed between the parent link and the child link.

[0170] (3.3.1) Action Example 1

[0171] In Rel-16, the IAB node can provide the CU 50 or parent node with a multiplexing capability for the combination of MT and DU transmission directions per pair of {MTCC / DU cells}. However, the behavior of the IAB node depends on the installation.

[0172] In action example 1-1, for each pair of {MT CC / DU cells}, CU50 may notify the IAB node via RRC and / or F1-AP signaling whether multiplexing between MT and DU related to the combination of their transmission directions is supported.

[0173] In action example 1-2, the DU of the IAB node can perform the following actions. Specifically, in the case of a DU serving cell, if the D / U / F codeword is set to Hard, the DU can perform transceiver, transmit, or receive within that codeword. This is in accordance with Rel-16.

[0174] On the other hand, if the D / U / F symbol is set to NA, the DU can be in accordance with Option 1 or Option 2 as described above.

[0175] Specifically, in the case of Option 1, the DU may not perform transmission or reception within this symbol. This is also an operation in accordance with Rel-16.

[0176] In the case of option 2, when the DU reports that the IAB node supports the multiplexing capability of the combination of transmission directions of MT and DU in the pair consisting of the MT service cell and the DU service cell, and / or when the IAB node is set with the multiplexing capability of the combination of transmission directions of MT and DU through CU 50 in the pair consisting of the MT service cell and the DU service cell, transceiving, sending or receiving can be performed within the codeword.

[0177] In addition, if the DU resource (specifically, D / U / F codeword) is set to Soft, the DU can perform transceiver, transmission, or reception within the codeword only in the following cases.

[0178] The MT of the IAB node performs transmission or reception in this symbol. The IAB node may report to the CU 50 that the MT serving cell and the DU serving cell (abbreviated as DU cell) support the combined multiplexing capability for the transmission directions of MT and DU in a pair.

[0179] In addition, as described above, the multiplexing capability for the combination of the transmission directions of MT and DU in the IAB node can be set by the CU 50 (implicit indication).

[0180] The MT of the IAB node does not perform transmission or reception in this symbol (this is an action according to Rel-16, an implicit indication).

[0181] The MT of the IAB node can detect DCI format 2_5 (refer to 3GPP TS 38.212 Chapter 7.3) having an AvailabilityIndicator (AI) index field value indicating that the symbol (Soft) can be used (this is an implicit indication based on Rel-16 operation).

[0182] In addition, in assumption 1, when the DU of the IAB node can be transmitted or received in a symbol set to Hard, Soft, or NA, the DU of the IAB node can be transmitted and / or received in any frequency resource of the DU serving cell.

[0183] (3.3.2) Action Example 2

[0184] In the case of a DU serving cell, the DU of the IAB node can use time-frequency (TF) resources (TF resources) to perform transmission and / or reception only when time resources are set and / or indicated as available and frequency resources are set and / or indicated as available.

[0185] Regarding time resources, the configuration and / or indication signaling of DU resources according to Rel-16 can be reused. In addition, the above-mentioned operation example 1 can be reused to determine whether a DU symbol can be used.

[0186] Regarding frequency resources, similar to time resources, whether DU resources are available can be indicated by H / S / NA in units of resource blocks (RBs), resource block groups (RBGs), subcarriers, etc. in the frequency direction.

[0187] Table 1 shows the operation of the IAB node DU for each combination of the type of time resource (H / S / NA) and the type of frequency resource (H / S / NA).

[0188] [Table 1]

[0189]

[0190] In addition, Soft-IA can be interpreted as a soft resource that is explicitly designated as available through DCI, or as a soft resource that is implicitly determined as available.

[0191] Soft-INA can be interpreted as a soft resource that is explicitly designated as unusable through DCI or a soft resource that is implicitly determined to be unusable.

[0192] Furthermore, the IAB node may operate as follows: For example, in the case of a DU serving cell, if the DU symbol is set to Hard, the IAB node may perform transmission and / or reception in symbols corresponding to frequency resources also set to Hard.

[0193] Alternatively, when the DU symbol is set to Soft, the IAB node can perform transmission and / or reception in the symbol corresponding to the frequency resource that is explicitly designated as available through DCI or implicitly determined to be available and is set to Soft.

[0194] In addition, when the DU symbol is set to NA (corresponding to the case where the DU symbol is set to NA in Operation Example 1-2), the IAB node can operate according to any of the following options.

[0195] (Alt. 1): The DU does not perform transmission or reception in this symbol.

[0196] (Alt. 2): When it is reported that the IAB node supports the multiplexing capability for the combination of transmission directions of MT and DU in the pair consisting of the MT service cell and the DU service cell, and / or when the IAB node is set with the multiplexing capability for the combination of transmission directions of MT and DU through CU 50 in the pair consisting of the MT service cell and the DU service cell, the DU can perform transceiving, transmission, or reception within the codeword corresponding to the frequency resource set to Hard or within the codeword corresponding to the frequency resource set to Soft.

[0197] In addition, when the DU codeword is set to Soft, the DU of the IAB node can perform transmission and reception, sending or receiving within the codeword corresponding to the frequency resource set to Hard, or transmission and reception, sending or receiving within the codeword corresponding to the frequency resource explicitly specified as available through DCI or implicitly determined to be available and set to Soft (corresponding to the case where the DU codeword is set to NA in Action Example 1-2).

[0198] The MT of the IAB node can perform transmission or reception in this symbol. In addition, the IAB node can report to the network (which may include the CU 50) that the IAB node supports the multiplexing capability of the combination of MT and DU transmission directions in a pair consisting of an MT serving cell and a DU serving cell, and / or the CU 50 can be configured to enable the IAB node to support the multiplexing capability of the combination of MT and DU transmission directions in a pair consisting of an MT serving cell and a DU serving cell (implicit indication).

[0199] In this case, the MT of the IAB node may not transmit or receive in this symbol (implicit indication). In addition, the MT of the IAB node may detect DCI format 2_5 having a field value indicating the AI ​​index that can be used in this symbol (implicit indication according to the Rel-1 operation).

[0200] In addition, as described above, frequency resources may be specified in units of RBs or RBGs.

[0201] Next, a modification of Operation Example 2 will be described. Specifically, operations related to "setting and indicating the type of DU frequency resource (H / S / NA) combined with any type of DU symbol (time resource) set to H / S / NA" will be described.

[0202] As described above, the setting of frequency resources for the type of time resources (H / S / NA) can be performed according to either option of Alt.1 or Alt.2.

[0203] Figure 7AAn example of indicating DU resources according to the modification example (Alt. 1) of operation example 2 is shown. Figure 7B An example of indicating DU resources according to a modification example (Alt. 2) of operation example 2 is shown.

[0204] In Alt.1, such as Figure 7A As shown, the type of frequency resource (H / S / NA) can be specified in the same manner as the time resource (symbol). As described above, the type of frequency resource (H / S / NA) can be set independently of the setting state of the time resource (H / S / NA).

[0205] exist Figure 7A As shown on the right, whether the combination (matrix) position of time resources (e.g., codewords) and frequency resources (e.g., RBs) can be used can be determined by the setting of time resources (H / S / NA) and the setting of frequency resources (H / S / NA).

[0206] In Alt.2, for example, the DU frequency resource setting (H / S / NA) can be applied only to Hard symbols, only to Soft symbols, or to any combination of H / S / NA symbols.

[0207] exist Figure 7B , an example is shown in which the DU frequency resource configuration (H / S / NA) is applied only to Hard symbols. That is, the DU frequency resource configuration (H / S / NA) is not applied to Soft and NA symbols. Therefore, the type of DU frequency resources corresponding to Soft symbols can be predefined as Hard, and the type of DU frequency resources corresponding to NA symbols can be predefined as NA.

[0208] Therefore, for symbols that are not used, a default resource type can be predefined in the 3GPP standard. The default resource type can be applied to all frequency resources within a symbol (which can be expressed as corresponding to the symbol).

[0209] In addition, if Figure 7B As shown, when the DU is dynamically indicated by the CU 50 or the like as being able to utilize the resources, there may be a combination (matrix) position where the DU can perform transmission and / or reception.

[0210] When the types of symbols (H / S / NA) are different, a type that is the same as or different from the resource type of the frequency resource may be defined in advance.

[0211] For example, the DU frequency resource setting (H / S / NA) can be applied only to Hard symbols. Default resource types can be applied to Soft and NA symbols. In a specific example, frequency resources can be pre-specified as Hard for Soft symbols.

[0212] That is, if the symbol is set to Soft and is determined to be usable according to Rel-16, the IAB node can perform transmission and / or reception in the symbol on any frequency resource (the symbol corresponding to the frequency resource). Soft and NA symbols can be predefined with the same or different default resource types.

[0213] Therefore, in this modification example, even if the type of frequency resource is set, for example, when the type of frequency resource cannot be applied to the Soft symbol, the resource type can be applied to the Soft symbol.

[0214] (3.3.3) Action Example 3

[0215] As described above, this operation example is related to scenario 3 (the DU serving cell and the MT serving cell perform simultaneous transmission and reception using resources that partially overlap in the frequency direction).

[0216] In this case, in the case of the DU serving cell, if it is set and / or indicated that TF resources can be used, the DU of the IAB node can perform transmission and / or reception in the TF resources.

[0217] Specifically, in the case of a DU serving cell, the DU of the IAB node may operate as follows.

[0218] When the TF resource is set to Hard, transmission and / or reception can be performed on the TF resource. In addition, "on the TF resource" can mean that a wireless link (sub-link) using the TF resource is set to perform data transmission and / or reception.

[0219] When a TF resource is set to NA, transmission and reception may not be performed on the TF resource.

[0220] When the TF resource is set to Soft, if the TF resource is explicitly designated as available through DCI or implicitly determined to be available, transmission and / or reception can be performed on the TF resource.

[0221] (3.3.4) Action Example 4

[0222] As described above, the IAB node can report capability information related to simultaneous transceiving using FDM in the parent link and the child link to the network (which may include the CU 50).

[0223] In option 1, the IAB node can report a multiplexing capability indicating whether it supports FDM (out-band FDM) of assumption 1 or FDM (in-band FDM) of assumption 2.

[0224] When out-band FDM is supported, the above-mentioned operation example 1 can be applied. In addition, when in-band FDM is supported, the above-mentioned operation example 2 or operation example 3 can be applied.

[0225] Furthermore, in Option 2, the IAB node can report whether it supports the multiplexing capability of simultaneous transmission and reception using FDM. In this case, the following options can also be set.

[0226] (Option 2-1): When out-band FDM is supported, the above-mentioned operation example 1 is applied.

[0227] (Option 2-2): When in-band FDM is supported, the above-mentioned operation example 2 or operation example 3 is applied.

[0228] (3.3.5) Action Example 5

[0229] As described above, the CU 50 can set operations related to simultaneous transmission and reception using FDM for the IAB node.

[0230] In option 1, the CU 50 (network) can set whether the IAB node supports FDM (out-band FDM) of scenario 1 or FDM (in-band FDM) of scenario 2.

[0231] When out-band FDM is supported, the above-mentioned operation example 1 can be applied. In addition, when in-band FDM is supported, the above-mentioned operation example 2 or operation example 3 can be applied.

[0232] Furthermore, in Option 2, the CU 50 (network) can configure the IAB node to support simultaneous transmission and reception using FDM. If simultaneous transmission and reception using FDM is supported, the following options can be configured as a default operation.

[0233] (Option 2-1): Support out-band FDM and apply the above-mentioned action example 1.

[0234] (Option 2-2): Support in-band FDM and apply the above-mentioned Action Example 2 or Action Example 3.

[0235] (4) Action and Effect

[0236] According to the above-mentioned embodiment, the following effects can be obtained. Specifically, the wireless communication node 100B (IAB node) can receive setting information from the network, and the setting information indicates whether simultaneous transmission and reception based on frequency division multiplexing (FDM) can be performed in the wireless link between the upper node (the first wireless link (Link_parent)) and the wireless link between the lower node (the second wireless link (Link_child)). In addition, the wireless communication node 100B can set the first wireless link and the second wireless link according to the setting information.

[0237] Therefore, even when the IAB node performs simultaneous transmission and reception between the MT and DU using FDM, the IAB node, specifically the DU node, can easily determine whether simultaneous transmission and reception with the MT using FDM is possible. This allows the IAB node to perform appropriate simultaneous transmission and reception between the MT and DU using FDM.

[0238] In this embodiment, when the type of time resource allocated to a Link_child is not Link_child-dedicated, the wireless communication node 100B can use this time resource to configure the Link_child if instructed to enable simultaneous transmission and reception of the MT and DU using FDM. This reliably avoids resource contention between the MT and DU, allowing for more reliable simultaneous transmission and reception of the MT and DU using FDM.

[0239] In this embodiment, the wireless communication node 100B is capable of receiving resource information from the network, the resource information indicating the types (H / S / NA) of time resources and frequency resources allocated to the first wireless link with the upper node and the second wireless link with the lower node. Furthermore, when the wireless communication node 100B indicates that both the types (H / S / NA) of the time resources and the types (H / S / NA) of the frequency resources are usable as Link_child, the wireless communication node 100B is capable of performing simultaneous transmission and reception based on FDM in Link_parent and Link_child using the time resources and the frequency resources.

[0240] Therefore, even when the IAB node performs simultaneous transmission and reception between the MT and DU using FDM, the IAB node, specifically the DU node, can easily determine whether simultaneous transmission and reception with the MT using FDM is possible. This allows the IAB node to perform appropriate simultaneous transmission and reception between the MT and DU using FDM.

[0241] In this embodiment, the wireless communication node 100B can transmit capability information (UE capability) to the network, indicating whether simultaneous transmission and reception using FDM (FDD) is possible. Therefore, the network can configure simultaneous transmission and reception using FDM (FDD) appropriately based on the capabilities of the wireless communication node 100B (IAB node).

[0242] In this embodiment, the wireless communication node 100B can also receive indication information indicating whether the frequency bands used for simultaneous transmission and reception (FDD) in the first and second FDM-based wireless links overlap, or indicating a default action for such simultaneous transmission and reception. Therefore, the IAB node can perform appropriate FDM-based (FDD)-based simultaneous transmission and reception according to the conditions of the wireless communication system 10.

[0243] (5) Other implementation methods

[0244] Although the embodiment has been described above, it is not limited to the description of the embodiment and it is obvious to those skilled in the art that various modifications and improvements can be made.

[0245] For example, in the above embodiments, the names "parent node," "IAB node," and "child node" are used. However, if a wireless communication node structure is adopted that integrates "wireless backhaul between wireless communication nodes such as gNBs" and "wireless access to terminals," these names can be different. For example, they can be simply called "first node," "second node," etc., or they can be called "upper node," "lower node," "relay node," or "intermediate node."

[0246] 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.

[0247] In the above embodiments, the terms downlink (DL) and uplink (UL) are used, but other terms may be used. For example, they may be replaced or associated with terms such as forward link, reverse link, access link, and backhaul. Alternatively, terms such as first link, second link, first direction, and second direction may be simply used.

[0248] The block diagram used in the description of the above embodiment ( 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 it can be implemented by connecting two or more physically or logically separated devices directly or indirectly (for example, using wired or wireless connections) and 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.

[0249] Functionally, these include, but are not limited to, judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, resolving, selecting, choosing, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning. For example, a functional block (structural unit) that enables the transmission function is called a transmitting unit or a transmitter. In short, as described above, there is no particular limitation on the implementation method.

[0250] 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. Figure 8 FIG. 1 is a diagram showing an example of the hardware structure of the device. Figure 8 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 .

[0251] In the following description, the word "device" can be replaced with "circuit," "device," "unit," etc. The hardware structure of the device may include one or more of the devices shown in the figures, or may exclude some of the devices.

[0252] Each functional block of the device (refer to Figure 3 、 4 ) can be implemented by any hardware element or combination of hardware elements of the computer device.

[0253] In addition, each function in the device is implemented by the following method: predetermined software (program) is read into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations and controls the communication of the communication device 1004 or controls at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0254] The processor 1001 controls the entire computer by, for example, running an operating system. The processor 1001 may be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, a calculation device, registers, and the like.

[0255] In addition, the processor 1001 reads a program (program code), a software module or data 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 the computer to perform at least a part of the actions described in the above-mentioned embodiment is used. In addition, with respect to the various processes described above, although it is described that the various processes are performed by one processor 1001, the various processes described above can also be performed simultaneously or sequentially by two or more processors 1001. The processor 1001 can also be installed by one or more chips. In addition, the program can also be sent from the network via a telecommunications line.

[0256] Memory 1002 is a computer-readable recording medium and may be composed of, for example, at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), or a random access memory (RAM). Memory 1002 may also be referred to as a register, a cache, or a main memory (main storage device). Memory 1002 can store programs (program code), software modules, and the like that can execute the method according to an embodiment of the present disclosure.

[0257] The memory 1003 is a computer-readable recording medium, and may be composed of, for example, at least one of an optical disc such as a CD-ROM (Compact Disc ROM), a hard disk drive, a floppy disk, a magneto-optical disc (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 strip, and the like. The memory 1003 may also be referred to as an auxiliary storage device. The above-mentioned recording medium may be, for example, other appropriate media such as a database, a server, or the like that includes at least one of the memory 1002 and the memory 1003.

[0258] The communication device 1004 is hardware (transceiver) used for communication between computers via at least one of a wired network and a wireless network, and may also be called a network device, a network controller, a network card, a communication module, etc.

[0259] For example, the communication device 1004 may be configured to 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).

[0260] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to the outside (e.g., a display, speaker, LED light, etc.). Alternatively, the input device 1005 and the output device 1006 may be integrally formed (e.g., a touch panel).

[0261] Furthermore, 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 separate buses for each device.

[0262] Furthermore, the device may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a field-programmable gate array (FPGA), and some or all of the functional blocks may be implemented using such hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0263] 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 (Downlink Control Information: DCI), uplink control information (Uplink Control Information: UCI)), high-layer signaling (e.g., RRC signaling, medium access control (Medium Access Control: MAC) signaling, broadcast information (Master Information Block (Master Information Block: MIB), System Information Block (System Information Block: SIB)), other signals or a combination thereof. In addition, RRC signaling may also be referred to as an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.

[0264] Each form / embodiment described in this disclosure may also be applied to at least one of Long Term Evolution (LTE), LTE-Advanced (LTE-A), 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. Furthermore, a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A with 5G) may also be applied.

[0265] The processing procedures, timings, and flows of each form / implementation described in this disclosure may be performed in a different order unless there is a conflict. For example, the methods described in this disclosure use an illustrative order to present the elements of various steps, but are not limited to the specific order presented.

[0266] 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 including a base station, it is obvious that 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, considering an MME or S-GW, but not limited to these). In the above, the case where there is only 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, an MME and an S-GW).

[0267] 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.

[0268] Input or output information can be stored in a specific location (e.g., memory) or managed using a management table. Input or output information can be overwritten, updated, or appended. Output information can also be deleted. Input information can also be sent to other devices.

[0269] The determination may be made using a value represented by one bit (0 or 1), a Boolean value (Boolean: true or false), or a comparison of numerical values ​​(for example, comparison with a predetermined value).

[0270] Each form / implementation described in this disclosure may be used individually or in combination, and may be switched depending on the 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., not notifying the scheduled information).

[0271] Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by other names, shall be interpreted broadly to refer to instructions, sets of instructions, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0272] Furthermore, software, commands, information, and the like may be transmitted and received via a transmission medium. For example, if software is transmitted from a web page, server, or other remote source using at least one of a wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and a wireless technology (infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of a transmission medium.

[0273] The information, signals, etc. described in this disclosure may also be represented using any of a variety of different technologies. For example, data, commands, instructions, information, signals, bits, symbols, chips, etc. that may be referred to in the entire description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0274] In addition, the terms used in this disclosure and those necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Furthermore, a signal may be a message. Furthermore, a component carrier (CC) may be referred to as a carrier frequency, a cell, a frequency carrier, or the like.

[0275] The terms "system" and "network" used in this disclosure may be used interchangeably.

[0276] In addition, the information, parameters, etc. described in this disclosure may be represented by absolute values, relative values ​​relative to predetermined values, or other corresponding information. For example, wireless resources may also be indicated by indexes.

[0277] The names used for the above parameters are not limiting in any way. Furthermore, the formulas and the like using these parameters may sometimes differ from those explicitly stated in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by appropriate names, and the various names assigned to these various channels and information elements are not limiting in any way.

[0278] In this disclosure, terms such as "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", and "component carrier" are used interchangeably. Base stations are also sometimes referred to as macrocells, small cells, femtocells, and picocells.

[0279] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the base station's overall coverage area can be divided into multiple smaller areas, each of which can also provide communication services through a base station subsystem (for example, a small base station (Remote Radio Head: RRH) for indoor use).

[0280] The terms "cell" or "sector" refer to a portion or the entirety of a coverage area of ​​at least one of a base station and a base station subsystem that provides communication services within the coverage area.

[0281] In the present disclosure, terms such as “mobile station (MS)”, “user terminal (user terminal)”, “user equipment (UE)”, and “terminal” may be used interchangeably.

[0282] For mobile stations, those skilled in the art sometimes also use the following terms to refer to them: 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.

[0283] 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 unmanned (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.

[0284] In addition, the base station in the present disclosure can also be replaced by a mobile station (user terminal, the same below). For example, regarding a structure in which the communication between a base station and a mobile station is replaced by communication between multiple mobile stations (for example, it can also be called D2D (Device-to-Device: device to device), V2X (Vehicle-to-Everything: vehicle to everything system, etc.), the various forms / implementations of the present disclosure can also be applied. In this case, it can also be set as a structure in which the mobile station has the functions of the base station. In addition, terms such as "uplink" and "downlink" can also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. can also be replaced by side channels.

[0285] 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.

[0286] A radio frame can be composed of one or more frames in the time domain. In the time domain, one or more frames can be called a subframe. A subframe can be composed of one or more time slots in the time domain. A subframe can be a fixed time length (e.g., 1 ms) that is independent of the numerology.

[0287] A parameter set may be a communication parameter applied to at least one of the transmission and reception of a signal or channel. For example, the parameter set may include at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering performed by the transceiver in the frequency domain, specific windowing performed by the transceiver in the time domain, and the like.

[0288] A slot may be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. A slot may be a time unit based on a parameter set.

[0289] A time slot may contain multiple mini-slots. Each mini-slot may consist of one or more symbols in the time domain. Furthermore, a mini-slot may also be referred to as a sub-slot. A mini-slot may consist of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in time units larger than a mini-slot may be referred to as PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may be referred to as PDSCH (or PUSCH) mapping type B.

[0290] Radio frame, subframe, time slot, mini-time slot, and symbol all represent time units for signal transmission. Radio frame, subframe, time slot, mini-time slot, and symbol may be referred to by other corresponding names.

[0291] For example, a subframe can be called a transmission time interval (TTI), multiple consecutive subframes can be called a TTI, and a slot or minislot can be called a TTI. That is, at least one of a subframe and a TTI can be a subframe (1ms) in existing LTE, a period shorter than 1ms (e.g., 1-13 symbols), or a period longer than 1ms. Furthermore, the unit representing a TTI can be a slot, a minislot, or the like, rather than a subframe.

[0292] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communications. For example, in the LTE system, a base station schedules the allocation of radio resources (such as the frequency bandwidth and transmit power available to each user terminal) to each user terminal using TTIs. The definition of TTI is not limited to this.

[0293] A TTI can be a unit of time for transmitting data packets (transport blocks), code blocks, code words, etc. after channel coding, or a unit of processing for scheduling, link adaptation, etc. Furthermore, when a TTI is assigned, the time interval (e.g., the number of symbols) to which a transport block, code block, code word, etc. is actually mapped can be shorter than the TTI.

[0294] In addition, when one time slot or one mini-time slot is referred to as a TTI, one or more TTIs (i.e., one or more time slots or one or more mini-time slots) can constitute the minimum time unit of scheduling. In addition, the number of time slots (mini-time slots) constituting the minimum time unit of scheduling can be controlled.

[0295] A TTI with a time length of 1 ms is also called 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 called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a time slot, etc.

[0296] In addition, for long TTI (for example, normal TTI, subframe, etc.), it can be replaced with a TTI with a time length of more than 1ms, and for short TTI (for example, shortened TTI, etc.), it can be replaced with a TTI length that is smaller than long TTI (longTTI) and has a TTI length of more than 1ms.

[0297] A resource block (RB) is a unit of resource allocation in the time and frequency domains. In the frequency domain, it can contain one or more consecutive subcarriers. The number of subcarriers contained in an RB can be the same regardless of the parameter set, for example, it can be 12. The number of subcarriers contained in an RB can also be determined by the parameter set.

[0298] In addition, the time domain of an RB may include one or more symbols and may be the length of one slot, one mini-slot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0299] 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.

[0300] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0301] A bandwidth part (BWP) (also known as a fractional bandwidth) represents a subset of contiguous common resource blocks (RBs) used for a particular parameter set within a carrier. Common RBs can be identified by their index relative to the common reference point for that carrier. PRBs are defined within a BWP and numbered within that BWP.

[0302] 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.

[0303] At least one of the configured BWPs may be active, and it is not assumed that the UE transmits or receives predetermined signals / channels outside of the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may be replaced with "BWP".

[0304] The above-described structures of radio frames, subframes, slots, mini-slots, and symbols are merely examples. For example, various modifications may be made to the structures including the number of subframes in a radio frame, the number of slots per subframe or radio frame, the number of mini-slots in a slot, the number of symbols and RBs in a slot or mini-slot, the number of subcarriers in an RB, the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length.

[0305] 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, including the situation where there is one or more intermediate elements between the two elements that are "connected" or "coupled" to each other. The combination or connection between elements can be a physical combination or connection, a logical combination or connection, or a combination of these. For example, "access" can be used to replace "connection". In the context of the present disclosure, two elements can be considered to be "connected" or "coupled" to each other by using at least one of one or more wires, cables and printed electrical connections, and as some non-limiting and non-inclusive examples, by using electromagnetic energy such as electromagnetic energy with wavelengths in the wireless frequency domain, microwave region and light (including both visible and invisible) region.

[0306] The reference signal may be referred to as RS (Reference Signal) for short, or may be called a pilot signal depending on the applied standard.

[0307] The phrase "according to" used in this 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."

[0308] The "unit" in the configuration of each of the above-mentioned devices can be replaced with a "section", "circuit", "device", etc.

[0309] Any reference to an element using the terms "first," "second," etc., as used in this disclosure, does not necessarily limit the number or order of these elements. These terms are used in this disclosure as a convenient way to distinguish between two or more elements. Therefore, a reference to a first and a second element does not imply that only two elements can be used or that the first element must precede the second element in any form.

[0310] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, the term "or" used in this disclosure does not mean an exclusive OR.

[0311] In the present disclosure, when an article is added by translation, such as a, an, and the in English, the present disclosure also includes cases where the noun following the article is in plural form.

[0312] As used in this disclosure, terms such as "determining" and "determining" sometimes include a variety of actions. "Determining" and "judging" can 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, etc. as matters that have been "judged" or "determined". In addition, "determining" and "receiving" (for example, receiving information), transmitting (for example, sending information), inputting, outputting, accessing (for example, accessing data in a memory) as matters that have been "judged" or "determined". In addition, "determining" and "resolving" can include matters that have been selected, chosen, established, compared, etc. as matters that have been "judged" or "determined". That is, "determining" and "resolving" can include matters that have been "judged" or "determined". In addition, “judgment (decision)” can also be replaced by “assuming (assuming)”, “expecting (expecting)”, “considering (considering)” and the like.

[0313] In this disclosure, the phrase "A and B are different" may also mean "A and B are different from each other." Furthermore, the phrase may also mean "A and B are each different from C." Terms such as "separate" and "combined" may also be interpreted in the same way as "different."

[0314] While the present disclosure has been described in detail above, it should 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 various modifications and variations without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is for illustrative purposes only and does not have any limiting meaning on the present disclosure.

[0315] Description of labels:

[0316] 10 Wireless Communication Systems

[0317] 50 CU

[0318] 100A, 100B, 100C wireless communication nodes

[0319] 110 Wireless Transmission Unit

[0320] 120 Wireless receiving unit

[0321] 130 NW IF Department

[0322] 140 IAB node connection

[0323] 150 Control Department

[0324] 161 Wireless Transmission Unit

[0325] 162 Wireless Receiving Unit

[0326] 170 Upper node connection

[0327] 180 Lower node connection

[0328] 190 Control Department

[0329] UE 200

[0330] 1001 Processor

[0331] 1002 Memory

[0332] 1003 Memory

[0333] 1004 Communication device

[0334] 1005 Input Device

[0335] 1006 Output Device

[0336] 1007 Bus

Claims

1. A wireless communication node, wherein: The wireless communication node has: a receiving unit configured to receive resource information from a network, the resource information indicating types of time resources and frequency resources allocated to a first wireless link with an upper node and a second wireless link with a lower node; as well as a control unit configured to perform at least one of transmission and reception on the time resource and the frequency resource, The control unit performs transmission and reception on the time resource and the frequency resource when the types of the time resource and the frequency resource are set to hard, When the types of the time resource and the frequency resource are set to soft and indicate that the time resource and the frequency resource are available, transmission and reception are performed on the time resource and the frequency resource.

2. The wireless communication node according to claim 1, wherein The control unit does not perform transmission and reception on the time resource and the frequency resource when the types of the time resource and the frequency resource are set to be unusable.

3. The wireless communication node according to claim 1, wherein The receiving unit receives downlink control information from the network, The control unit performs transmission and reception on the time resource and the frequency resource when the downlink control information indicates that the time resource and the frequency resource are available.

4. A wireless communication method in a wireless communication node, wherein: The wireless communication method comprises the following steps: receiving resource information from the network, the resource information indicating types of time resources and frequency resources allocated to a first wireless link with an upper node and a second wireless link with a lower node; as well as performing at least one of transmission and reception on the time resource and the frequency resource, In the steps of executing, When the types of the time resource and the frequency resource are set to hard, transmission and reception are performed on the time resource and the frequency resource. When the types of the time resource and the frequency resource are set to soft and indicate that the time resource and the frequency resource are available, transmission and reception are performed on the time resource and the frequency resource.

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