WO2022024312A1 - 無線通信ノード - Google Patents

無線通信ノード Download PDF

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Publication number
WO2022024312A1
WO2022024312A1 PCT/JP2020/029302 JP2020029302W WO2022024312A1 WO 2022024312 A1 WO2022024312 A1 WO 2022024312A1 JP 2020029302 W JP2020029302 W JP 2020029302W WO 2022024312 A1 WO2022024312 A1 WO 2022024312A1
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WIPO (PCT)
Prior art keywords
resource
node
wireless communication
wireless
pdcch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
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PCT/JP2020/029302
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English (en)
French (fr)
Japanese (ja)
Inventor
大輔 栗田
浩樹 原田
ウェイチー スン
ジン ワン
ギョウリン コウ
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NTT Docomo Inc
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NTT Docomo Inc
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Filing date
Publication date
Application filed by NTT Docomo Inc filed Critical NTT Docomo Inc
Priority to JP2022539912A priority Critical patent/JP7637142B2/ja
Priority to PCT/JP2020/029302 priority patent/WO2022024312A1/ja
Priority to CN202080104686.2A priority patent/CN116134861B/zh
Priority to EP20946563.2A priority patent/EP4192068A4/en
Publication of WO2022024312A1 publication Critical patent/WO2022024312A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
    • H04B7/15542—Selecting at relay station its transmit and receive resources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • This disclosure relates to a wireless communication node that sets wireless access and a wireless backhaul.
  • the 3rd Generation Partnership Project (3GPP) specifies the 5th generation mobile communication system (also called 5G, New Radio (NR) or Next Generation (NG)), and next-generation specifications called Beyond 5G, 5G Evolution or 6G. We are also proceeding with the conversion.
  • 5G New Radio
  • NG Next Generation
  • RAN Radio Access Network
  • UE User Equipment
  • gNB wireless base stations
  • IAB nodes have MobileTermination (MT), which is a function for connecting to a parent node (which may be called an IAB donor), and Distributed Unit (DU), which is a function for connecting to a child node or UE. ) And.
  • MT MobileTermination
  • DU Distributed Unit
  • frequency division multiplexing is used in the wireless link (Link_parent) between the parent node and IAB node, that is, the wireless link between MT and the IAB node and child node (Link_child), that is, DU. It is planned to support simultaneous transmission and reception using.
  • the wireless communication node constituting the IAB node determines whether or not the DU resource (specifically, the frequency resource) assigned to Link_child can be applied to simultaneous transmission / reception with MT using FDM. Can't.
  • the IAB node may properly determine how long to apply the frequency resource as available. difficult.
  • the purpose is to provide a wireless communication node that can more reliably execute simultaneous transmission / reception using FDM in MT and DU.
  • One aspect of the present disclosure is to set a receiving unit (wireless receiving unit 162) that receives resource information indicating the type of resource assigned to the wireless link with the lower node from the network, and the wireless link based on the resource information.
  • a control unit (control unit 190) is provided, and the type includes a specific type in which the availability of a frequency resource in the frequency direction can be specified, and the control unit includes the specific type when the frequency resource is the specific type.
  • One aspect of the present disclosure is to set a receiving unit (wireless receiving unit 162) that receives resource information indicating the type of resource assigned to the wireless link with the lower node from the network, and the wireless link based on the resource information.
  • a control unit (control unit 190) is provided, and the type includes a specific type in which the availability of a frequency resource in the frequency direction can be specified, and the control unit includes the specific type when the frequency resource is the specific type.
  • FIG. 1 is an overall schematic configuration diagram of the wireless communication system 10.
  • FIG. 2 is a diagram showing a basic configuration example of the IAB.
  • FIG. 3 is a functional block configuration diagram of the wireless communication node 100A.
  • FIG. 4 is a functional block configuration diagram of the wireless communication node 100B.
  • FIG. 5 is an explanatory diagram of the application period (Applicable time duration) of the resource information received via the PDCCH in the IAB node.
  • FIG. 6 is a diagram showing a schematic communication sequence regarding the setting of the DU resource of the IAB node.
  • FIG. 7 is a diagram showing an example of the relationship between PDCCH and Applicable time duration according to operation example 1 (option 1-1).
  • FIG. 8 is a diagram showing an example of the relationship between PDCCH and Applicable time duration according to operation example 1 (option 1-2).
  • FIG. 9 is a diagram showing an example of the relationship between PDCCH and Applicable time duration according to operation example 1 (option 2-1).
  • FIG. 10 is a diagram showing an example of the relationship between PDCCH and Applicable time duration according to operation example 1 (option 2-2).
  • FIG. 11 is a diagram showing an example (Alt.1) of the relationship between PDCCH and Applicable time duration according to the operation example 3 (case 1-1).
  • FIG. 12 is a diagram showing an example (Alt.2) of the relationship between PDCCH and Applicable time duration according to operation example 3 (case 1-1).
  • FIG. 13 is a diagram showing an example (Alt.1) of the relationship between PDCCH and Applicable time duration according to the operation example 3 (case 1-2).
  • FIG. 14 is a diagram showing an example (Alt.2) of the relationship between PDCCH and Applicable time duration according to operation example 3 (case 1-2).
  • FIG. 15 is a diagram showing an example (Alt.3-1) of the relationship between PDCCH and Applicable time duration according to the operation example 3 (case 1-2).
  • FIG. 16 is a diagram showing an example (Alt.3-2) of the relationship between PDCCH and Applicable time duration according to the operation example 3 (case 1-2).
  • FIG. 17 is a diagram showing an example of the relationship between PDCCH and Applicable time duration according to operation example 3 (case 2-1).
  • FIG. 18 is a diagram showing an example (Alt.1) of the relationship between PDCCH and Applicable time duration according to operation example 3 (case 2-2).
  • FIG. 19 is a diagram showing an example (Alt.2) of the relationship between PDCCH and Applicable time duration according to operation example 3 (case 2-2).
  • FIG. 20 is a diagram showing an example (Alt.1) of the relationship between PDCCH and Applicable time duration according to the operation example 3 (case 3).
  • FIG. 21 is a diagram showing an example (Alt.2-1) of the relationship between PDCCH and Applicable time duration according to the operation example 3 (case 3).
  • FIG. 22 is a diagram showing an example (Alt.2-2) of the relationship between PDCCH and Applicable time duration according to the operation example 3 (case 3).
  • FIG. 23 is a diagram showing an example of the relationship between the DCI format and the Applicable time duration according to the operation example 4 (option 1).
  • FIG. 24 is a diagram showing an example of the relationship between the DCI format and the Applicable time duration according to the operation example 4 (option 2-1).
  • FIG. 25 is a diagram showing an example of the hardware configuration of the CU 50 and the wireless communication nodes 100A to 100C.
  • FIG. 1 is an overall schematic configuration diagram of the wireless communication system 10 according to the present embodiment.
  • the wireless communication system 10 is a wireless communication system according to 5G New Radio (NR), and is composed of a plurality of wireless communication nodes and terminals.
  • NR 5G New Radio
  • the wireless communication system 10 includes wireless communication nodes 100A, 100B, 100C, and a user terminal 200 (hereinafter, UE200).
  • UE200 user terminal 200
  • Wireless communication nodes 100A, 100B, 100C can set wireless access with UE200 and wireless backhaul (BH) between the wireless communication nodes. Specifically, a backhaul (transmission path) by a wireless link is set between the wireless communication node 100A and the wireless communication node 100B, and between the wireless communication node 100A and the wireless communication node 100C.
  • BH wireless backhaul
  • IAB Integrated Access and Backhaul
  • IAB reuses existing features and interfaces defined for wireless access.
  • MT Mobile-Termination
  • gNB-DU Distributed Unit
  • gNB-CU Central Unit
  • UPF User Plane Function
  • AMF Access and Mobility Management Function
  • SMF Session Management Function
  • NRUu between MT and gNB / DU
  • F1, NG, X2 and N4 may be used as the baseline.
  • the 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 line such as a fiber transport.
  • NG-RAN / NGC includes CentralUnit50 (hereinafter referred to as CU50), which is a communication node.
  • CU50 CentralUnit50
  • NG-RAN and NGC may be included and simply expressed as "network”.
  • the CU50 may be configured by any or a combination of the above-mentioned UPF, AMF, and SMF.
  • the CU 50 may be a gNB-CU as described above.
  • FIG. 2 is a diagram showing a basic configuration example of IAB.
  • the wireless communication node 100A constitutes a parent node (Parent node) in the IAB
  • the wireless communication node 100B (and the wireless communication node 100C) constitutes an IAB node in the IAB. ..
  • the parent node may be called a higher-level node in relation to the IAB node.
  • the parent node may be referred to as the IAB donor.
  • the IAB node may be called a lower node in relation to the parent node.
  • the child node in the IAB is composed of other wireless communication nodes (not shown in FIG. 1).
  • the UE 200 may configure a child node.
  • the IAB node may be referred to as the superior node in relation to the child node, and the child node may be referred to as the inferior node in relation to the IAB node.
  • a wireless link is set between the parent node and the IAB node. Specifically, a wireless link called Link_parent is set.
  • a wireless link is set between the IAB node and the child node. Specifically, a wireless link called Link_child is set.
  • the wireless link set between such wireless communication nodes may be called a wireless backhaul link.
  • Link_parent is composed of DLParentBH in the downward direction and ULParentBH in the upward direction.
  • Link_child is composed of DLChild BH in the downward direction and ULChild BH in the upward direction.
  • the wireless link set between the UE200 and the IAB node or parent node is called a wireless access link.
  • the wireless link is composed of DLAccess in the downlink direction and ULAccess in the uplink direction.
  • the IAB node has a MobileTermination (MT) that is a function for connecting to a parent node and a Distributed Unit (DU) that is a function for connecting to a child node (or UE200). Although omitted in FIG. 2, the parent node and the child node also have MT and DU.
  • MT MobileTermination
  • DU Distributed Unit
  • the wireless resources used by DU include downlink (DL) and uplink (UL) from the viewpoint of DU.
  • Flexible time-resource (D / U / F) are classified into either Hard, Soft or Not Available (H / S / NA) type. Also, in Soft (S), available or not available is stipulated.
  • Flexible time-resource is a time resource that can be used for both DL and UL. Further, “Hard” is a wireless resource that can always be used for DU child link in which the corresponding time resource is connected to the child node or UE, and “Soft” is for DU child link of the corresponding time resource. It is a radio resource (DU resource) whose availability is explicitly or implicitly controlled by the parent node.
  • the wireless resource to be notified can be determined based on IA or INA.
  • IA means that the DU resource is explicitly or implicitly indicated as available. Also, “INA” means that the DU resource is explicitly or implicitly indicated as not available.
  • IAB configuration example shown in FIG. 2 uses CU / DU division, but the IAB configuration is not necessarily limited to such a configuration.
  • IAB may be configured by tunneling using GPRS Tunneling Protocol (GTP) -U / User Datagram Protocol (UDP) / Internet Protocol (IP).
  • GTP GPRS Tunneling Protocol
  • UDP User Datagram Protocol
  • IP Internet Protocol
  • IAB The main advantage of such IAB is that NR cells can be arranged flexibly and at high density without increasing the density of the transport network. IAB can be applied to various scenarios such as outdoor small cell placement, indoors, and even support for mobile relays (eg, in buses and trains).
  • the IAB may also support NR-only stand-alone (SA) deployments or non-standalone (NSA) deployments including other RATs (LTE, etc.), as shown in FIGS. 1 and 2.
  • SA stand-alone
  • NSA non-standalone
  • the wireless access and the wireless backhaul may be half-duplex communication (Half-duplex) or full-duplex communication (Full-duplex).
  • time division multiplexing TDM
  • spatial division multiplexing SDM
  • frequency division multiplexing FDM
  • DLParentBH is on the receiving (RX) side
  • ULParentBH is on the transmitting (TX) side
  • DLChildBH is on the transmitting (TX) side
  • Child BH is the receiving (RX) side.
  • TDD Time Division Duplex
  • the DL / UL setting pattern on the IAB node is not limited to DL-F-UL, but only the wireless backhaul (BH), UL-F-DL, and other setting patterns. May be applied.
  • simultaneous operation of DU and MT of the IAB node is realized by using SDM / FDM.
  • FIG. 3 is a functional block configuration diagram of the wireless communication node 100A constituting the parent node.
  • the radio communication node 100A includes a radio transmission unit 110, a radio reception unit 120, a NW IF unit 130, an IAB node connection unit 140, and a control unit 150.
  • the wireless transmitter 110 transmits a wireless signal according to the 5G specifications. Further, the wireless receiver 120 transmits a wireless signal according to the 5G specifications. In the present embodiment, the wireless transmission unit 110 and the wireless reception unit 120 execute wireless communication with the wireless communication node 100B constituting the IAB node.
  • 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.
  • the wireless transmission unit 110 and the wireless reception unit 120 can execute wireless communication according to Half-duplex and Full-duplex. Further, the wireless transmission unit 110 and the wireless reception unit 120 can execute wireless communication according to FDM and SDM, not limited to TDM (TDD).
  • TDM TDM
  • the NW IF unit 130 provides a communication interface that realizes a connection with the NGC side and the like.
  • the NW IF unit 130 may include interfaces such as X2, Xn, N2, and N3.
  • the IAB node connection unit 140 provides an interface or the like that realizes a connection with an IAB node (or a child node including a UE). Specifically, the IAB node connection unit 140 provides the distributed unit (DU) function. That is, the IAB node connection unit 140 is used for connection with the IAB node (or child node).
  • DU distributed unit
  • the IAB node may be expressed as a RAN node that supports wireless access to the UE200 and backhauls access traffic wirelessly.
  • the parent node, or IAB donor may 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.
  • the control unit 150 controls each functional block constituting the wireless communication node 100A.
  • the control unit 150 executes control regarding the setting of the wireless link with the IAB node (wireless communication node 100B).
  • control unit 150 can determine the DU resource (which may be called a radio resource) assigned to the radio link set via the DU function for the IAB node.
  • the resource may include a time resource in the time direction and a frequency resource in the frequency direction.
  • the time resource is a resource in the time direction, and a symbol, a slot, a subframe, or the like may be used as a unit. Further, the time direction may be referred to as a time domain, a symbol period, a symbol time, or the like. The symbol may be referred to as an Orthogonal Frequency Division Multiplexing (OFDM) symbol.
  • OFDM Orthogonal Frequency Division Multiplexing
  • a frequency resource is a resource in the frequency direction, and a resource block, a resource block group, a subcarrier, or the like may be used as a unit. Further, the frequency direction may be referred to as a frequency domain, a resource block, a resource block group, a subcarrier, a BWP (Bandwidth part), or the like.
  • BWP Bandwidth part
  • FIG. 4 is a functional block configuration diagram of the wireless communication node 100B constituting the IAB node.
  • 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.
  • the wireless communication node 100B has a functional block similar to the wireless communication node 100A (parent node) described above, but includes a higher node connection unit 170 and a lower node connection unit 180, and a function of the control unit 190. Is different.
  • the wireless transmitter 161 transmits a wireless signal according to the 5G specifications.
  • the wireless receiver 162 transmits a wireless signal according to the 5G specifications.
  • the wireless transmission unit 161 and the wireless reception unit 162 execute wireless communication with the wireless communication node 100A constituting the parent node and wireless communication with the child node (including the case of UE200).
  • the wireless transmission unit 161 and the wireless reception unit 162 are used for wireless communication according to Half-duplex and Full-duplex, as well as FDM and SDM, as well as TDM (TDD), in the same manner as the wireless communication node 100A (parent node). According to the wireless communication can be executed.
  • the radio receiver 162 determines the type of resource allocated to the radio link with another radio communication node constituting the child node in relation to the lower node, specifically the UE200 or the IAB node.
  • the indicated resource information can be received from the network.
  • the wireless receiving unit 162 constitutes a receiving unit.
  • the radio receiving unit 162 can receive resource information indicating the type (H / S / NA) of the DU resource assigned to the radio link set via the DU function for the lower node.
  • the resource information may be transmitted from the CU50 according to the F1-AP (Application) protocol applied to the F1 interface between the CU and DU, or by signaling the radio resource control layer (RRC) to the network (specifically). , GNB).
  • RRC radio resource control layer
  • the resource information received by the wireless receiver 162 can indicate the type of time resource (time resource) (H / S / NA) and the type of frequency resource (frequency resource) (H / S / NA).
  • the type of the DU resource may include a specific type (S) in which the availability of the time resource in the time direction can be specified. Further, in the present embodiment, it is possible to indicate whether the frequency resource is H / S / NA, and it is also possible to set Soft (S) that can specify IA or INA (usability).
  • S Soft
  • the resource specifically, the type of the DU resource may include a specific type (S) in which the availability of the frequency resource in the frequency direction can be specified.
  • S specific type
  • the radio receiving unit 162 can receive resource information indicating whether or not the frequency resource can be used.
  • the wireless receiving unit 162 may receive resource information indicating whether or not the time resource can be used and whether or not the frequency resource can be used. That is, the radio receiver 162 receives the resource information indicating the distinction between IA and INA when the time resource is Soft (S) and the distinction between IA and INA when the frequency resource is Soft (S). can.
  • the resource information includes a resource type (Hard, Soft or NA) for each unit (for example, a symbol) in the time direction and a resource type (Hard, Soft or NA) for each unit (for example, a subcarrier) in the frequency direction. NA) and can be shown.
  • the unit in the time direction (which may be read as a time unit) is not limited to symbols, and may be a slot composed of a plurality of symbols (for example, 14 symbols).
  • the resource information may indicate a frequency resource with reference to a resource block (RB) or a resource block group (RBG).
  • RB resource block
  • RBG resource block group
  • One RB may be interpreted as 12 resource elements (REs) in the frequency domain, where one RE is the smallest resource grid composed of one subcarrier (one OFDM symbol in the time domain) in the frequency domain. It may be interpreted as a unit.
  • the wireless receiving unit 162 can receive resource information indicating whether or not the frequency resource can be used for each unit in the time direction.
  • the radio receiver 162 can receive resource information indicating the distinction between IA and INA when the frequency resource is Soft (S) for each symbol (which may be a slot or the like) which is a unit in the time direction.
  • S Soft
  • the wireless reception unit 162 can also receive the resource information indicating whether or not the frequency resource can be used only in the unit in the time direction corresponding to the time resource. ..
  • the radio receiver 162 targets only the unit (for example, a symbol) in the time direction of the time resource, and IA or when the frequency resource is Soft (S). Can receive resource information indicating INA.
  • the upper node connection unit 170 provides an interface that realizes a connection with a node higher than the IAB node.
  • the upper node means a wireless communication node located on the network, specifically, the core network side (which may be called the upstream side or the upstream side) rather than the IAB node.
  • the upper node connection unit 170 provides the MobileTermination (MT) function. That is, in the present embodiment, the upper node connection unit 170 is used for connection with the parent node constituting the upper node.
  • MT MobileTermination
  • the lower node connection unit 180 provides an interface that realizes a connection with a node lower than the IAB node.
  • the lower node means a wireless communication node located on the end user side (which may be called the downstream side or the downlink side) of the IAB node.
  • the lower node connection unit 180 provides the distributed unit (DU) function. That is, in the present embodiment, the lower node connection unit 180 is used for connection with a child node (which may be UE200) constituting the lower node.
  • DU distributed unit
  • the control unit 190 controls each functional block constituting the wireless communication node 100B.
  • the control unit 190 sets a wireless link based on the resource information received from the network (which may include the CU50).
  • control unit 190 is a lower node, specifically, based on the type of time resource (H / S / NA) indicated by the resource information and the type of frequency resource (H / S / NA). Can determine the resource (DU resource) allocated to the radio link with other radio communication nodes constituting the child node in relation to the UE200 or the IAB node.
  • control unit 190 can determine the DU resource assigned to the wireless link with the other wireless communication node based on the combination of the time resource and the frequency resource (called the T-F resource).
  • Various channels may be transmitted and received via the wireless link to which the DU resource is assigned.
  • the Channels include control channels and data channels.
  • the control channel includes PDCCH (Physical Downlink Control Channel), PUCCH (Physical Uplink Control Channel), PRACH (Physical Random Access Channel), PBCH (Physical Broadcast Channel) and the like.
  • the data channels include PDSCH (Physical Downlink Shared Channel) and PUSCH (Physical Uplink Shared Channel).
  • PDSCH Physical Downlink Shared Channel
  • PUSCH Physical Uplink Shared Channel
  • the reference signal includes Demodulation reference signal (DMRS), Sounding Reference Signal (SRS), Phase Tracking Reference Signal (PTRS), and Channel State Information-Reference Signal (CSI-RS), and the signal includes a channel. And reference signals are included. Further, the data may mean data transmitted via a data channel.
  • DMRS Demodulation reference signal
  • SRS Sounding Reference Signal
  • PTRS Phase Tracking Reference Signal
  • CSI-RS Channel State Information-Reference Signal
  • Uplink Control Information is UL control information, and is symmetric control information of Downlink Control Information (DCI).
  • UCI is transmitted via PUCCH or PUSCH.
  • UCI may include SR (Scheduling Request), HARQ (Hybrid Automatic repeat request) ACK / NACK, CQI (Channel Quality Indicator), and the like.
  • DCI is DL control information.
  • DCI is transmitted via PDCCH.
  • the DCI may include PDSCH and PUSCH schedule information and the like.
  • the control unit 190 can determine the application of the frequency resource based on the reception timing of the resource information.
  • control unit 190 contains resource information that can be included in a DCI, for example, DCI format 2_5 (see Chapter 7.3 of 3GPP TS38.212) or a new format DCI (referred to as DCI format X for convenience).
  • DCI format 2_5 see Chapter 7.3 of 3GPP TS38.212
  • DCI format X a new format DCI
  • control unit 190 may determine whether or not not only the soft frequency resource but also the T-F resource set in Soft (hereinafter referred to as soft T-F resource) is applied to the DU resource (same below).
  • control unit 190 may determine the application of the soft frequency resource based on the slot or symbol that has received the resource information.
  • the timing of starting the application to the DU resource as the soft frequency resource may be the same as the reception of the resource information or may be after a certain time lag has elapsed.
  • the control unit 190 may determine the application period (Applicable time duration) for applying the frequency resource to the DU resource as Soft. Specifically, the control unit 190 can determine the length applied in the time direction of the soft frequency resource set by DCI format 2_5 or DCI format X.
  • control unit 190 may apply the length of the slot or symbol as the application period, and the application period may be predetermined by the specifications of 3GPP or may be set by signaling such as RRC. ..
  • control unit 190 may determine the monitoring cycle of the downlink control channel as the applicable period. Specifically, the control unit 190 can determine the same time as the monitoring period of the PDCCH as the application period.
  • the monitoring cycle may be indicated by DCI format X.
  • control unit 190 has the same monitoring cycle and application period of the PDCCH, and when the wireless receiving unit 162 receives the resource information only through a part of the PDCCH, the monitoring that received the resource information.
  • the frequency resource may be applied as Soft (specific type) only in the period.
  • Frequency resources can be applied as Soft (specific type).
  • the wireless receiving unit 162 when the monitoring cycle and the application period of the PDCCH are the same and the wireless receiving unit 162 receives the resource information only through a part of the PDCCH, the wireless receiving unit 162 newly obtains the resource information.
  • the frequency resource may be applied as Soft (specific type) until it is received.
  • control unit 190 receives the resource information via the PDCCH received first, and if the PDCCH received next does not include the resource information, until the resource information is newly received via the PDCCH.
  • the frequency resource may be applied as Soft (specific type).
  • the IAB node wireless communication node 100B
  • the IAB node 100B has a wireless link (parent link (Link_parent)) with the parent node (wireless communication node 100A) and a child node (UE200, or another radio constituting the child node).
  • the operation related to simultaneous transmission / reception using FDM between the wireless link (child link (Link_child)) with the communication node) will be described.
  • the DU resource for TDM can be configured quasi-static.
  • the IAB node DU can set the resource type (type) of Hard, Soft or NA for the symbol in each slot.
  • the setting can be realized by using GNB-DU RESOURCE CONFIGURATION, which is an F1-AP message sent from CU50.
  • the IAB node DU can send / receive, send or receive within the symbol only in the following cases.
  • the IAB node MT detects DCI format 2_5 (see Chapter 7.3 of 3GPP TS38.212) and indicates that the symbol is available by the field value of the Availability Indicator (AI) index (explicit instruction).
  • the CU50 uses the information element (IE) of the Served Cell Information to perform F1-AP signaling of the frequency information and transmission bandwidth of the serving cell (hereinafter referred to as DU serving cell) formed by the DU.
  • IE information element
  • Served Cell Information can include IE for NR Frequency Info and Transmission Bandwidth.
  • Release 17 of 3GPP plans to expand wireless resource multiplexing in order to support simultaneous transmission and reception on parent and child links.
  • the availability (IA or INA) of the resource may be set dynamically. In this case, availability may be explicitly indicated or implicitly indicated.
  • the availability (IA / INA) of the soft frequency resource (or soft TF resource) is determined by notifying the IAB node of the resource information using DCI (DCI format 2_5 and / or DCI format X). Can be instructed.
  • the issue is which slot / symbol should be applied to the soft frequency resource instruction by the DCI.
  • FIG. 5 is an explanatory diagram of the application period (Applicable time duration) of the resource information received via the PDCCH in the IAB node.
  • the IA / INA of the soft frequency resource based on the resource information contained in the DCI transmitted via the PDCCH may apply the corresponding slot or symbol as an Applicable time duration.
  • the IA / INA of the soft frequency resource may apply a unit in the time direction (which may be called a time unit) as an Applicable time duration.
  • the time unit may be a subframe of each slot / multi-slot / slot / symbol / symbol group / type of D / U / F resource (time resource) set in advance quasi-statically (same below).
  • the software T-F resource IA / INA can apply the size (length) of the time resource as an Applicable time duration.
  • the following describes the operation related to the setting of DCI format (DCI format X, etc.) that indicates the dynamic availability of the soft frequency resource for DU of the IAB node, especially the operation related to the application period of the resource information included in DCI. ..
  • ⁇ (Alt.3-2) The IAB node is The latest setting is applied to resources with duplicate settings.
  • ⁇ (Case 2) When the length of the resource set by DCI format in the time direction is the same as the monitoring cycle of PDCCH.
  • -(Option 2-1) The IAB node receives DCI format X and sets the resources according to both DCI formats at the timing when DCI format 2_5 is set.
  • -(Option 2a) The IAB node sets the resources according to DCI format 2_5. And it is assumed that the setting cycle of DCI format X and the monitoring cycle of DCI are the same.
  • ⁇ (Option 3) The relationship between DCI format X and DCI format 2_5 is not specified.
  • ⁇ (Option 3) The IAB node. Makes DU work
  • FIG. 6 shows a schematic communication sequence for setting the DU resource of the IAB node.
  • the CU 50 transmits a GNB-DU RESOURCE CONFIGURATION including the type (type) of the DU resource of the IAB node to the wireless communication node 100B (IAB node) (S10).
  • GNB-DU RESOURCE CONFIGURATION is a type of F1-AP message and is specified in 3GPP TS38.473.
  • the wireless communication node 100B specifically the DU of the IAB node, returns the GNB-DU RESOURCE CONFIGURATION ACKNOWLEDGE to the CU50 in response to the reception of the GNB-DU RESOURCE CONFIGURATION (S20).
  • GNB-DU RESOURCE CONFIGURATION and GNB-DU RESOURCE CONFIGURATION ACKNOWLEDGE are a type of F1-AP message and are specified in 3GPP TS38.473.
  • the wireless communication node 100B sets the DU resource based on the type (H / S / NA) of the DU resource included in the GNB-DU RESOURCE CONFIGURATION (S30).
  • the wireless communication node 100B determines the time resource and frequency resource allocated to the child link (Link_child) based on the type of DU resource (H / S / NA).
  • the child link may be called a DU serving cell as described above.
  • 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).
  • a parent link (Link_parent) and a child link (Link_child) (S40).
  • FDM transmission / reception according to FDM, that is, FDD is executed between the parent link and the child link.
  • Option 1 defines the application start slot of the resource to be set. That is, the start slot of the IA / INA application period (Applicable time duration) of the soft frequency resource is defined.
  • FIG. 7 shows an example of the relationship between PDCCH and Applicable time duration according to operation example 1 (option 1-1).
  • the IAB node may start the Applicable time duration from the slot in which the DCI format X notified via the PDCCH is detected.
  • FIG. 8 shows an example of the relationship between PDCCH and Applicable time duration according to operation example 1 (option 1-2).
  • the IAB node when the IAB node detects (receives) DCI format X in slot n, the IAB node may start Applicable time duration from the first slot (X) after slot n.
  • X may be a subframe, a slot, a subslot, or a symbol as a unit.
  • X may be specified by an absolute value.
  • X may be specified in advance by the specifications of 3GPP, or may be set or instructed by DCI format X.
  • Option 2 defines the application start symbol of the resource to be set. That is, the start symbol of the IA / INA Applicable time duration of the soft frequency resource is specified.
  • FIG. 9 shows an example of the relationship between PDCCH and Applicable time duration according to operation example 1 (option 2-1).
  • the IAB node may start the Applicable time duration from the symbol that first receives the PDCCH that detected DCI format X.
  • FIG. 10 shows an example of the relationship between PDCCH and Applicable time duration according to operation example 1 (option 2-2).
  • the IAB node may start the Applicable time duration from the first symbol "X" time after the completion of receiving the PDCCH in which DCI format X is detected.
  • X may be in the subframe, slot, subslot, or symbol as a unit, as in option 1-2.
  • “X” may be specified by an absolute value.
  • "X” may be specified in advance by the specifications of 3GPP, or may be set or instructed by DCI format X.
  • the IAB node can determine the availability of soft frequency resources based on the instructions given by DCI format X. More specifically, the IAB node may determine that the soft frequency resource is available when DCI format X indicates that the soft frequency resource is IA.
  • the number of slots / symbols included in the Applicable time duration may be specified in advance by the specifications of 3GPP, or may be set for the IAB node by signaling such as RRC.
  • the IAB node may assume that the number of slots / symbols included in the Applicable time duration is the same as the monitoring cycle of the PDCCH to which DCI format X is transmitted.
  • the IAB node sets the soft frequency resource based on the Applicable time duration of the resource set by the DCI format, that is, the relationship between the length in the time direction and the monitoring periodicity of the PDCCH. Can be changed.
  • Case 1 can be further distinguished into a case where the DCI format is notified via a plurality of PDCCHs (case 1-1) and a case where the DCI format is notified only to the first PDCCH (case 1-2).
  • FIG. 11 shows an example (Alt.1) of the relationship between PDCCH and Applicable time duration according to operation example 3 (case 1-1).
  • the IAB node assumes that the same settings, that is, IA or INA, are applied to the soft frequency resources (TF resources) whose settings are duplicated (see the frame in the figure). good.
  • the IAB node may assume that the availability (IA or INA) of the same content applies to the overlapping Applicable time durations based on DCI notified via different PDCCHs.
  • FIG. 12 shows an example (Alt.2) of the relationship between PDCCH and Applicable time duration according to operation example 3 (case 1-1).
  • the IAB node may apply the latest settings to soft frequency resources (or T-F resources, the same shall apply hereinafter) with overlapping settings.
  • the IAB node considers that the earlier Applicable time duration based on the DCI notified via a different PDCCH is invalid when it overlaps with the later Applicable time duration.
  • the availability (IA or INA) may be determined based on the later Applicable time duration.
  • FIG. 13 shows an example (Alt.1) of the relationship between PDCCH and Applicable time duration according to operation example 3 (case 1-2). As shown in FIG. 13, DCI is not detected in the later PDCCH, and the Applicable time duration is not set.
  • the IAB node may set the soft frequency resource until the reception timing of the next PDCCH, but after the reception timing of the next PDCCH for which DCI is not notified, the Applicable time duration is invalidated and the soft frequency resource is disabled. You may cancel the setting of. In other words, the IAB node may maintain the soft frequency resource setting until the next PDCCH reception timing when DCI is not notified.
  • FIG. 14 shows an example (Alt.2) of the relationship between PDCCH and Applicable time duration according to operation example 3 (case 1-2). As shown in FIG. 14, in the later PDCCH, DCI is not detected and Applicable time duration is not set.
  • the IAB node may continue the length in the time direction previously notified, that is, the Applicable time duration as it is. That is, the IAB node may continue to determine the availability (IA or INA) of the soft frequency resource until the previous Applicable time duration is completed, regardless of the reception timing of the next PDCCH.
  • the IAB node may repeat the setting of the length (Applicable time duration) in the notified time direction until the next DCI is notified via PDCCH.
  • FIG. 15 shows an example (Alt.3-1) of the relationship between PDCCH and Applicable time duration according to operation example 3 (case 1-2).
  • the IAB node may assume that the same settings are applied to resources having overlapping settings (see the frame in the figure).
  • the IAB node repeats the setting of Applicable time duration based on the previously detected DCI until it detects a new DCI via the PDCCH (the third PDCCH in the figure), and detects a new DCI. It may be assumed that the availability (IA or INA) of the same content is applied to the part where the Applicable time duration overlaps.
  • FIG. 16 shows an example (Alt.3-2) of the relationship between PDCCH and Applicable time duration according to operation example 3 (case 1-2).
  • the IAB node may apply the newest settings for soft frequency resources with overlapping settings.
  • the IAB node considers that the earlier Applicable time duration based on the DCI notified via a different PDCCH is invalid when it overlaps with the later Applicable time duration.
  • the availability (IA or INA) may be determined based on the later Applicable time duration.
  • Case 2 can be further divided into the case where a new setting is notified for each PDCCH (Case 2-1) and the case where the DCI format is notified only for the first PDCCH (Case 2-2).
  • FIG. 17 shows an example of the relationship between PDCCH and Applicable time duration according to operation example 3 (case 2-1). As shown in FIG. 17, when the setting of the new soft frequency resource is notified for each PDCCH, the Applicable time duration is also set for each reception of the PDCCH, so that no particular problem occurs.
  • FIG. 18 shows an example (Alt.1) of the relationship between PDCCH and Applicable time duration according to operation example 3 (case 2-2). As shown in FIG. 18, in Case 2-2, DCI is not detected in the later PDCCH, and Applicable time duration is not set.
  • the IAB node may apply the setting only to the soft frequency resource of the PDCCH monitoring cycle notified of DCI. That is, as shown in FIG. 18, if DCI is not detected, there may be a soft frequency resource to which the setting is not applied.
  • FIG. 19 shows an example (Alt.2) of the relationship between PDCCH and Applicable time duration according to operation example 3 (case 2-2).
  • the IAB node may repeat the setting of the length (Applicable time duration) in the notified time direction until the next DCI is notified via the PDCCH.
  • FIG. 20 shows an example (Alt.1) of the relationship between PDCCH and Applicable time duration according to the operation example 3 (case 3).
  • the IAB node may apply the setting only to the resource of the PDCCH monitoring cycle notified of DCI. That is, as shown in FIG. 20, soft frequency resources to which the setting is not applied may occur until the reception timing of the next PDCCH.
  • the IAB node may repeatedly set the length (Applicable time duration) in the notified time direction.
  • FIG. 21 shows an example (Alt.2-1) of the relationship between PDCCH and Applicable time duration according to the operation example 3 (case 3).
  • the IAB node assumes that the same settings, that is, IA or INA, are applied to the soft frequency resources (TF resources) whose settings are duplicated (see the frame in the figure). good.
  • FIG. 22 shows an example (Alt.2-2) of the relationship between PDCCH and Applicable time duration according to the operation example 3 (case 3).
  • the IAB node may apply the newest settings for soft frequency resources with overlapping settings.
  • the IAB node considers that the earlier Applicable time duration based on the DCI notified via a different PDCCH is invalid when it overlaps with the later Applicable time duration.
  • the availability (IA or INA) may be determined based on the later Applicable time duration.
  • the IAB node is set to Soft (S) by setting the Applicable time duration based on DCI format 2_5 (specified for time resources) and DCI format X (specified for frequency resources). You can decide whether to use the resource.
  • DCI format 2_5 which indicates the availability of soft time resources (IA or INA)
  • DCI format X which indicates the availability of soft frequency resources
  • the IAB node may assume that the IAB node has the same DCI format 2_5 and DCI format X settings and PDCCH monitoring cycle. Further, the IAB node may assume that the Applicable time duration by DCI format 2_5 and DCI format X has the same length.
  • FIG. 23 shows an example of the relationship between the DCI format and the Applicable time duration according to the operation example 4 (option 1). As shown in FIG. 23, it may be assumed that the IAB node has the same DCI format 2_5 and DCI format X settings and PDCCH monitoring cycle.
  • the Applicable time duration by DCI format X may follow any of the above-mentioned operation examples 1 to 3.
  • DCI format X may refer to the Applicable time duration of DCI format 2_5, which is located in the same PDCCH monitoring opportunity (MO) as DCI format X. That is, the IAB node may start the Applicable time duration from the slot in which DCI format 2_5 is detected, and the number of slots included in the Applicable time duration may be determined based on the Availability Combination included in DCI format 2_5.
  • MO PDCCH monitoring opportunity
  • the IAB node has the same setting cycle of DCI format 2_5 and DCI format X. That is, it may be assumed that the IAB node has the same Applicable time duration (length in the time direction) by DCI format 2_5 and DCI format X.
  • FIG. 24 shows an example of the relationship between the DCI format and the Applicable time duration according to the operation example 4 (option 2-1).
  • the IAB node may receive DCI format X and set resources according to both DCI formats at the timing when DCI format 2_5 is set.
  • the Applicable time duration by DCI format X may follow any of the above-mentioned operation examples 1 to 3. Further, the DCI format X may refer to the Applicable time duration of the first DCI format 2_5 received after the DCI format X. That is, the IAB node may start the Applicable time duration from the slot in which DCI format 2_5 is detected, and the number of slots included in the Applicable time duration may be determined based on the Availability Combination included in DCI format 2_5.
  • the IAB node may assume that the DCI format 2_5 and DCI format X setting cycles and the DCI monitoring cycle (which may be interpreted as the PDCCH monitoring cycle) are equal (option 2a). This is similar to option 2, but with the addition of the restriction that DCI format X and DCI format 2_5 are the same PDCCH monitoring opportunity (MO).
  • the IAB node may set the Applicable time duration separately based on each of DCI format X and DCI format 2_5.
  • the IAB node may operate the DU of the IAB node as follows in the absence of DCI instructions as described above.
  • the IAB node operates the DU according to the operating status of the MT. May be decided. That is, the IAB node may implicitly determine the availability of soft frequency resources according to the operating status of the MT.
  • the IAB node may use the frequency resource to execute transmission and / or reception in DU.
  • the IAB node does not operate the DU if the DCI indicating the availability of the resource (IA / INA) cannot be detected, that is, the DU of the IAB node transmits and / or is in the resource (soft frequency resource). It is not necessary to execute reception.
  • the IAB node operates the DU if the DCI indicating the availability of the resource (IA / INA) cannot be detected, that is, the DU of the IAB node transmits and / or is in the resource (soft frequency resource). You may execute reception.
  • the wireless communication node 100B is the type of DU resource (H / S / NA) assigned to the wireless link configured via the DU function for the subordinate node (UE200 or child node). Can receive resource information indicating. Further, the wireless communication node 100B can set a wireless link (child link) based on the resource information. Further, when the frequency resource is a specific type (Soft (S)), the wireless communication node 100B can determine the application of the frequency resource based on the reception timing of the resource information.
  • Soft Soft
  • the IAB node is a DU resource, specifically MT using FDM. It is possible to determine whether or not the frequency resource can be applied to simultaneous transmission / reception with. As a result, the IAB node can perform appropriate simultaneous transmission / reception using FDM between MT and DU.
  • the wireless communication node 100B can determine the application of the soft frequency resource based on the slot or symbol that has received the resource information. Therefore, the IAB node can accurately and easily determine the application period (Applicable time duration) of the availability (IA / INA) of the soft frequency resource.
  • the Applicable time duration to be applied to the DU resource can be determined by setting the frequency resource as Soft. Therefore, the IAB node can quickly and accurately determine the soft frequency resources applicable as DU resources.
  • the wireless communication node 100B can determine the PDCCH monitoring cycle as an Applicable time duration. Therefore, the IAB node can easily set an efficient Applicable time duration consistent with the reception of DCI.
  • the wireless communication node 100B has the same PDCCH monitoring cycle and Applicable time duration, and when resource information is received only via some PDCCH, only in the monitoring cycle in which the resource information is received.
  • Frequency resources can be applied as Soft (specific type).
  • the wireless communication node 100B has the same PDCCH monitoring cycle and application period, and when resource information is received only via some PDCCH, the frequency resource is softened until the resource information is newly received. It can be applied as (specific type).
  • the IAB node can realize the appropriate soft frequency resource setting according to the state of the IAB node and / or the network.
  • the names of the parent node, the IAB node, and the child node are used, but the wireless communication in which the wireless backhaul between the wireless communication nodes such as gNB and the wireless access to the terminal are integrated.
  • the names may be different as long as the node configuration is adopted. For example, it may be simply called a first node, a second node, or the like, or it may be called an upper node, a lower node, a relay node, an intermediate node, or the like.
  • the wireless communication node may be simply referred to as a communication device or a communication node, or may be read as a wireless base station.
  • downlink (DL) and uplink (UL) were used, but they may be referred to by other terms. For example, it may be replaced with or associated with terms such as forward ring, reverse link, access link, and backhaul. Alternatively, terms such as first link, second link, first direction, and second direction may be simply used.
  • each functional block may be realized using one physically or logically coupled device, or two or more physically or logically separated devices can be directly or indirectly (eg, for example). , Wired, wireless, etc.) and may be realized using these plurality of devices.
  • the functional block may be realized by combining the software with the one device or the plurality of devices.
  • Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and assumption.
  • a functional block (configuration unit) that makes transmission function is called a transmitting unit (transmitting unit) or a transmitter (transmitter).
  • the realization method is not particularly limited.
  • FIG. 25 is a diagram showing an example of the hardware configuration of the device. As shown in FIG. 25, the device may be configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.
  • the word “device” can be read as a circuit, device, unit, etc.
  • the hardware configuration of the device may be configured to include one or more of each of the devices shown in the figure, or may be configured not to include some of the devices.
  • Each functional block of the device (see FIGS. 3 and 4) is realized by any hardware element of the computer device or a combination of the hardware elements.
  • each function in the device is such that the processor 1001 performs an operation by loading predetermined software (program) on the hardware such as the processor 1001 and the memory 1002, and controls the communication by the communication device 1004, or the memory. It is realized by controlling at least one of reading and writing of data in 1002 and storage 1003.
  • predetermined software program
  • Processor 1001 operates, for example, an operating system to control the entire computer.
  • the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, and the like.
  • CPU central processing unit
  • the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these.
  • a program program code
  • a program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used.
  • the various processes described above may be executed by one processor 1001 or may be executed simultaneously or sequentially by two or more processors 1001.
  • Processor 1001 may be implemented by one or more chips.
  • the program may be transmitted from the network via a telecommunication line.
  • the memory 1002 is a computer-readable recording medium, and is composed of at least one such as ReadOnlyMemory (ROM), ErasableProgrammableROM (EPROM), Electrically ErasableProgrammableROM (EEPROM), and RandomAccessMemory (RAM). May be done.
  • the memory 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like.
  • the memory 1002 can store a program (program code), a software module, or the like that can execute the method according to the embodiment of the present disclosure.
  • the storage 1003 is a computer-readable recording medium, for example, an optical disk such as Compact Disc ROM (CD-ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, or a Blu-ray). It may consist of at least one (registered trademark) disk), smart card, flash memory (eg, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like.
  • Storage 1003 may be referred to as auxiliary storage.
  • the recording medium described above may be, for example, a database, server or other suitable medium containing at least one of the memory 1002 and the storage 1003.
  • the communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.
  • the communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). It may be composed of.
  • FDD frequency division duplex
  • TDD time division duplex
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts an input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside.
  • the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
  • Bus 1007 may be configured using a single bus or may be configured using different buses for each device.
  • the device includes hardware such as a microprocessor, a digital signal processor (Digital Signal Processor: DSP), ApplicationSpecific IntegratedCircuit (ASIC), ProgrammableLogicDevice (PLD), and FieldProgrammableGateArray (FPGA).
  • the hardware may implement some or all of each functional block.
  • processor 1001 may be implemented using at least one of these hardware.
  • information notification includes physical layer signaling (eg Downlink Control Information (DCI), Uplink Control Information (UCI), higher layer signaling (eg RRC signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block)). (MIB), System Information Block (SIB)), other signals or combinations thereof.
  • DCI Downlink Control Information
  • UCI Uplink Control Information
  • RRC signaling eg RRC signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block)).
  • MIB System Information Block
  • SIB System Information Block
  • RRC signaling may also be referred to as an RRC message, eg, RRC Connection Setup. ) Message, RRC Connection Reconfiguration message, etc. may be used.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • SUPER 3G IMT-Advanced
  • 4G 5th generation mobile communication system.
  • 5G Future Radio Access
  • FAA New Radio
  • NR New Radio
  • W-CDMA registered trademark
  • GSM registered trademark
  • CDMA2000 Code Division Multiple Access 2000
  • UMB Ultra Mobile Broadband
  • IEEE 802.11 Wi-Fi (registered trademark)
  • IEEE 802.16 WiMAX®
  • IEEE 802.20 Ultra-WideBand (UWB), Bluetooth®, and other systems that utilize appropriate systems and at least next-generation systems extended based on them.
  • a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G).
  • the specific operation performed by the base station in this disclosure may be performed by its upper node (upper node).
  • various operations performed for communication with the terminal are the base station and other network nodes other than the base station (eg, MME or). It is clear that it can be done by at least one of (but not limited to, S-GW, etc.).
  • S-GW network node
  • the case where there is one network node other than the base station is illustrated above, it may be a combination of a plurality of other network nodes (for example, MME and S-GW).
  • Information and signals can be output from the upper layer (or lower layer) to the lower layer (or upper layer).
  • Input / output may be performed via a plurality of network nodes.
  • the input / output information may be stored in a specific location (for example, memory) or may be managed using a management table.
  • the input / output information may be overwritten, updated, or added.
  • the output information may be deleted.
  • the entered information may be transmitted to other devices.
  • the determination may be made by a value represented by one bit (0 or 1), by a true / false value (Boolean: true or false), or by comparing numerical values (for example, a predetermined value). It may be done by comparison with the value).
  • the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit one, but is performed implicitly (for example, the notification of the predetermined information is not performed). May be good.
  • Software whether referred to as software, firmware, middleware, microcode, hardware description language, or other names, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module.
  • Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.
  • software, instructions, information, etc. may be transmitted and received via a transmission medium.
  • a transmission medium For example, a website, where the software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technology (infrared, microwave, etc.).
  • wired technology coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.
  • wireless technology infrared, microwave, etc.
  • the information, signals, etc. described in this disclosure may be represented using any of a variety of different techniques.
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.
  • a channel and a symbol may be a signal (signaling).
  • the signal may be a message.
  • the component carrier (CC) may be referred to as a carrier frequency, a cell, a frequency carrier, or the like.
  • system and “network” used in this disclosure are used interchangeably.
  • the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented.
  • the radio resource may be one indicated by an index.
  • Base Station BS
  • Wireless Base Station Wireless Base Station
  • NodeB NodeB
  • eNodeB eNodeB
  • gNodeB gNodeB
  • Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.
  • a base station can accommodate one or more (eg, three) cells (also called sectors). When a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a remote radio for indoor use). Communication services can also be provided by Head: RRH).
  • RRH Remote Radio Head
  • cell refers to a base station that provides communication services in this coverage, and part or all of the coverage area of at least one of the base station subsystems.
  • MS Mobile Station
  • UE user equipment
  • terminal terminal
  • Mobile stations can be used by those skilled in the art as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless. It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.
  • At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, or the like.
  • At least one of the base station and the mobile station may be a device mounted on the mobile body, a mobile body itself, or the like.
  • the moving body may be a vehicle (eg, car, airplane, etc.), an unmanned moving body (eg, drone, self-driving car, etc.), or a robot (manned or unmanned). ) May be.
  • at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation.
  • at least one of a base station and a mobile station may be an Internet of Things (IoT) device such as a sensor.
  • IoT Internet of Things
  • the base station in the present disclosure may be read as a mobile station (user terminal, the same shall apply hereinafter).
  • communication between a base station and a mobile station has been replaced with communication between a plurality of mobile stations (for example, it may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.).
  • D2D Device-to-Device
  • V2X Vehicle-to-Everything
  • Each aspect / embodiment of the present disclosure may be applied to the configuration.
  • the mobile station may have the functions of the base station.
  • the words such as "up” and “down” may be read as words corresponding to the communication between terminals (for example, "side”).
  • the upstream channel, the downstream channel, and the like may be read as a side channel.
  • the mobile station in the present disclosure may be read as a base station.
  • the base station may have the functions of the mobile station.
  • the wireless frame may be composed of one or more frames in the time domain. Each one or more frames in the time domain may be referred to as a subframe. Subframes may further be composed of one or more slots in the time domain.
  • the subframe may have a fixed time length (eg, 1 ms) that does not depend on numerology.
  • the numerology may be a communication parameter that applies to at least one of the transmission and reception of a signal or channel.
  • Numerology includes, for example, SubCarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (Transmission Time Interval: TTI), number of symbols per TTI, wireless frame configuration, transmission / reception. It may indicate at least one of a specific filtering process performed by the machine in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like.
  • the slot may be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain.
  • the slot may be a unit of time based on numerology.
  • the slot may include a plurality of mini slots. Each minislot may be composed of one or more symbols in the time domain. Further, the mini slot may be referred to as a sub slot. The minislot may consist of a smaller number of symbols than the slot.
  • PDSCH (or PUSCH) transmitted in time units larger than the minislot may be referred to as PDSCH (or PUSCH) mapping type A.
  • the PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (or PUSCH) mapping type B.
  • the wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal.
  • the radio frame, subframe, slot, minislot and symbol may use different names corresponding to each.
  • one subframe may be referred to as a transmission time interval (TTI)
  • TTI transmission time interval
  • TTI transmission time interval
  • TTI transmission time interval
  • TTI transmission time interval
  • TTI transmission time interval
  • TTI slot or one minislot
  • at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (eg, 1-13 symbols), or a period longer than 1ms. May be.
  • the unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.
  • TTI refers to, for example, the minimum time unit of scheduling in wireless communication.
  • a base station schedules each user terminal to allocate radio resources (frequency bandwidth that can be used in each user terminal, transmission power, etc.) in TTI units.
  • the definition of TTI is not limited to this.
  • TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation.
  • the time interval for example, the number of symbols
  • the transport block, code block, code word, etc. may be shorter than the TTI.
  • one or more TTIs may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
  • TTI with a time length of 1 ms may be called normal TTI (TTI in LTE Rel.8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc.
  • a TTI shorter than a normal TTI may be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.
  • the long TTI (for example, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms
  • the short TTI (for example, shortened TTI, etc.) may be read as a TTI less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.
  • the resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain.
  • the number of subcarriers contained in RB may be the same regardless of numerology, and may be, for example, 12.
  • the number of subcarriers contained in the RB may be determined based on numerology.
  • the time domain of RB may include one or more symbols, and may have a length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI.
  • Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.
  • One or more RBs are physical resource blocks (Physical RB: PRB), sub-carrier groups (Sub-Carrier Group: SCG), resource element groups (Resource Element Group: REG), PRB pairs, RB pairs, etc. May be called.
  • Physical RB Physical RB: PRB
  • sub-carrier groups Sub-Carrier Group: SCG
  • resource element groups Resource Element Group: REG
  • PRB pairs RB pairs, etc. May be called.
  • the resource block may be composed of one or a plurality of resource elements (ResourceElement: RE).
  • RE resource elements
  • 1RE may be a radio resource area of 1 subcarrier and 1 symbol.
  • Bandwidth Part (which may also be called partial bandwidth, etc.) may represent a subset of consecutive common resource blocks (RBs) for a neurology in a carrier. good.
  • the common RB may be specified by the index of the RB with respect to the common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within that BWP.
  • BWP may include BWP for UL (UL BWP) and BWP for DL (DL BWP).
  • BWP for UL
  • DL BWP BWP for DL
  • One or more BWPs may be set in one carrier for the UE.
  • At least one of the configured BWPs may be active, and the UE may not expect to send or receive a given signal / channel outside the active BWP.
  • “cell”, “carrier” and the like in this disclosure may be read as “BWP”.
  • the above-mentioned structures such as wireless frames, subframes, slots, mini-slots and symbols are merely examples.
  • the number of subframes contained in a radio frame the number of slots per subframe or radioframe, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, included in RB.
  • the number of subcarriers, as well as the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.
  • connection means any direct or indirect connection or connection between two or more elements and each other. It can include the presence of one or more intermediate elements between two “connected” or “joined” elements.
  • the connection or connection between the elements may be physical, logical, or a combination thereof.
  • connection may be read as "access”.
  • the two elements use at least one of one or more wires, cables and printed electrical connections, and, as some non-limiting and non-comprehensive examples, the radio frequency domain.
  • Electromagnetic energy with wavelengths in the microwave and light (both visible and invisible) regions, etc. can be considered to be “connected” or “coupled” to each other.
  • the reference signal can also be abbreviated as Reference Signal (RS), and may be called a pilot (Pilot) depending on the applied standard.
  • RS Reference Signal
  • Pilot pilot
  • each of the above devices may be replaced with a "part”, a “circuit”, a “device”, or the like.
  • references to elements using designations such as “first” and “second” as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Therefore, references to the first and second elements do not mean that only two elements can be adopted there, or that the first element must somehow precede the second element.
  • determining and “determining” used in this disclosure may include a wide variety of actions.
  • “Judgment” and “decision” are, for example, judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry). It may include (eg, searching in a table, database or another data structure), ascertaining as “judgment” or “decision”.
  • judgment and “decision” are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. It may include (for example, accessing data in memory) to be regarded as “judgment” or “decision”.
  • judgment and “decision” are considered to be “judgment” and “decision” when the things such as solving, selecting, choosing, establishing, and comparing are regarded as “judgment” and “decision”. Can include. That is, “judgment” and “decision” may include considering some action as “judgment” and “decision”. Further, “judgment (decision)” may be read as “assuming", “expecting”, “considering” and the like.
  • the term "A and B are different” may mean “A and B are different from each other”.
  • the term may mean that "A and B are different from C”.
  • Terms such as “separate” and “combined” may be interpreted in the same way as “different”.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
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