WO2022249681A1 - 無線通信ノード及び無線通信方法 - Google Patents
無線通信ノード及び無線通信方法 Download PDFInfo
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- WO2022249681A1 WO2022249681A1 PCT/JP2022/012805 JP2022012805W WO2022249681A1 WO 2022249681 A1 WO2022249681 A1 WO 2022249681A1 JP 2022012805 W JP2022012805 W JP 2022012805W WO 2022249681 A1 WO2022249681 A1 WO 2022249681A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
- H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
- H04B7/06952—Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping
- H04B7/06954—Sidelink beam training with support from third instance, e.g. the third instance being a base station
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0636—Feedback format
- H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/28—Cell structures using beam steering
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- 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
-
- 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
- H04W88/08—Access point devices
- H04W88/085—Access point devices with remote components
Definitions
- the present disclosure relates to a wireless communication node and wireless communication method for setting up wireless access and wireless backhaul.
- the 3rd Generation Partnership Project (3GPP) has specified the 5th generation mobile communication system (also called 5G, New Radio (NR) or Next Generation (NG)), and the next generation specification called Beyond 5G, 5G Evolution or 6G We are also proceeding with 5G, 5G Evolution or 6G We are also proceeding with 5G, 5G Evolution or 6G We are also proceeding with 5G, 5G Evolution or 6G We are also proceeding with 5G, 5G Evolution or 6G We are also proceeding with 5G, 5G Evolution or 6G
- the integrated access and backhaul integrates radio access to terminals (user equipment, UE) and radio backhaul between radio communication nodes such as radio base stations (gNBs).
- UE user equipment
- gNBs radio base stations
- an IAB node has Mobile Termination (MT), a function for connecting with parent nodes (which may be called IAB donors), and Distributed Unit (DU), a function for connecting with child nodes or UEs. ) and
- MT Mobile Termination
- DU Distributed Unit
- support for dynamic indication of beam limitation/use/availability is being considered to facilitate concurrent operation and interference management of IAB nodes.
- a parent node can recognize information about an IAB node (MT)'s antenna beam (may be simply referred to as a beam) by operating in accordance with 3GPP Release 16 specifications, but information about an IAB node (DU)'s antenna beam cannot be recognized.
- MT IAB node
- DU IAB node
- the following disclosure is made in view of this situation, and provides a wireless communication node and a wireless communication method that can recognize in more detail information about antenna beams of IAB nodes (DU). With the goal.
- One aspect of the present disclosure is a receiving unit (radio communication unit 110) that receives first beam information about an antenna beam of a first unit of a lower node, the first beam information, and an antenna of a second unit of the lower node.
- a wireless communication node wireless communication node 100 including a controller (controller 190) that holds second beam information about beams.
- One aspect of the present disclosure is a receiving unit (radio communication unit 110) that receives beam information about the antenna beam of the first unit of the own node from an upper node, and based on the beam information, the second unit of the own node
- a wireless communication node wireless communication node 150 including a controller (controller 190) that sets the antenna beam to be used.
- An aspect of the present disclosure is a step of receiving first beam information regarding an antenna beam of a first unit of a lower node; said first beam information; and second beam information regarding an antenna beam of a second unit of said lower node; and holding a wireless communication method.
- One aspect of the present disclosure is a step of receiving beam information about an antenna beam of a first unit of the own node from an upper node, and setting the antenna beam used by the second unit of the own node based on the beam information. and a wireless communication method.
- FIG. 1 is an overall schematic configuration diagram of a radio communication system 10.
- FIG. FIG. 2 is a functional block configuration diagram of the wireless communication node 50.
- FIG. 3 is a functional block configuration diagram of the wireless communication node 100 and the wireless communication node 150.
- FIG. 4 is a diagram showing an example of a schematic communication sequence regarding control of antenna beams BM of IAB-MT and IAB-DU.
- FIG. 5 is a diagram showing an example of the hardware configuration of the radio communication node 50, radio communication node 100, radio communication node 150 and UE200.
- FIG. 1 is an overall schematic configuration diagram of a radio communication system 10 according to the present embodiment.
- the radio communication system 10 is a radio communication system according to 5G New Radio (NR), and is composed of a plurality of radio communication nodes and terminals.
- NR 5G New Radio
- the radio communication system 10 may be a radio communication system conforming to a scheme called Beyond 5G, 5G Evolution, or 6G.
- the radio communication system 10 includes Next Generation-Radio Access Network 20 (hereinafter NG-RAN 20, radio communication node 50, radio communication node 100, radio communication node 150 and terminal 200 (hereinafter UE 200, User Equipment) including.
- NG-RAN 20 Next Generation-Radio Access Network 20
- UE 200 User Equipment
- the radio communication node 50, the radio communication node 100, and the radio communication node 150 can establish a radio access (Access link) with the UE 200 and a radio backhaul (Backhaul link) between the radio communication nodes via the cell.
- a radio access Access link
- a radio backhaul Backhaul link
- a backhaul transmission path
- IAB Integrated Access and Backhaul
- the IAB will reuse existing functions and interfaces defined for wireless access.
- Mobile-Termination MT
- gNB-DU Distributed Unit
- gNB-CU Central Unit
- UPF User Plane Function
- AMF Access and Mobility Management Function
- SMF Session Management Function
- NR Uu MT to gNB/DU
- F1, NG, X2 and N4 may be used as a baseline.
- the wireless communication node 100 is connected to the NG-RAN 20 and core network (Next Generation Core (NGC) or 5GC) via a wired transmission line such as fiber transport.
- NGC Next Generation Core
- 5GC 5th Generation Core
- NG-RAN and NGC may be simply referred to as a "network”.
- the wireless communication node 50 may constitute an IAB donor in the IAB, and the wireless communication node 100 may constitute a parent node in the IAB. Also, the wireless communication node 150 may constitute an IAB node in the IAB.
- the IAB donor (or parent node) may be called a higher node in relation to the IAB node.
- an IAB donor may be referred to as a Parent node, or vice versa.
- an IAB donor has a CU, and a parent node is simply used as a name in relation to an IAB node (or child node) and may not have a CU.
- An IAB node may be called a subordinate node in relation to an IAB donor (parent node).
- the child node may include UE200.
- a wireless link is set up between the IAB donor (or parent node) and the IAB node. Specifically, a wireless link called Link_parent may be set up. A wireless link (backhaul link) is set between the IAB node and the child node. Specifically, a radio link called Link_child may be set up.
- Link_parent may consist of a downstream DL Parent BH and an upstream UL Parent BH.
- a Link_child may be composed of a downstream DL Child BH and an upstream UL Child BH.
- IAB nodes may include parent nodes
- IAB-MT Mobile Termination
- IAB-DU Distributed Unit
- Child nodes also have MT and DU.
- An IAB donor has a Central Unit (CU) and a DU.
- Radio resources used by DUs include downlink (DL), uplink (UL), and flexible time-resources (D/U/F) from the perspective of DUs, which are hard, soft, or not available (H/S/ NA) are classified into any type. Also, within Soft (S), available or not available is specified.
- DL downlink
- UL uplink
- D/U/F flexible time-resources
- Flexible time-resource is a radio resource (time resource and/or frequency resource) that can be used for either DL or UL.
- “Hard” is a radio resource that is always available for the DU child link in which the corresponding time resource is connected to the child node or UE, and “Soft” is the radio resource for the DU child link of the corresponding time resource.
- DU resource a radio resource (DU resource) whose availability is controlled explicitly or implicitly by the IAB donor (or parent node).
- IA means that the DU resource is explicitly or implicitly indicated as available. Also, “INA” means that the DU resource is explicitly or implicitly marked as unavailable.
- radio access and radio backhaul may be half-duplex or full-duplex.
- time division multiplexing TDM
- space division multiplexing SDM
- frequency division multiplexing FDM
- the DL/UL setting pattern at the IAB node is not limited to DL-F-UL, and there are setting patterns such as wireless backhaul (BH) only and UL-F-DL. may be applied.
- SDM/FDM is used to realize simultaneous operation of the DU and MT of the IAB node.
- Massive MIMO that generates antenna beams BM with higher directivity
- a carrier that bundles a plurality of component carriers (CC) Aggregation (CA) and dual connectivity (DC) in which communication is performed simultaneously between the UE and multiple NG-RAN Nodes can be supported.
- CC component carriers
- CA Aggregation
- DC dual connectivity
- the IAB may support dual connectivity (DC) scenarios, for example, intra-band DC and intra-carrier DC.
- DC dual connectivity
- Intra-band DC is DC within a specific frequency band (band), and multiple component carriers (CC) may be used.
- Intra-Carrier DC is DC within one CC band.
- An Intra-band DC may include an Intra-Carrier DC.
- a wireless communication node 150 may connect to two wireless communication nodes 100 and execute DC.
- one radio communication node 100 may form a master cell group (MCG) and the other radio communication node 100 may form a secondary cell group (SCG).
- MCG master cell group
- SCG secondary cell group
- FIG. 2 is a functional block configuration diagram of a radio communication node 50 that constitutes an IAB donor. As shown in FIG. 2, the radio communication node 50 includes a radio communication section 51, a NW IF section 53, a lower node connection section 55 and a control section 57. FIG.
- the wireless communication unit 51 transmits and receives wireless signals according to NR.
- the wireless communication unit 51 controls radio (RF) signals transmitted from multiple antenna elements to generate beams with higher directivity, Massive MIMO, and carrier aggregation that bundles multiple component carriers (CC). (CA), etc.
- RF radio
- Massive MIMO Massive MIMO
- CA carrier aggregation that bundles multiple component carriers
- the wireless communication unit 51 may or may not support DC.
- the NW IF unit 53 provides a communication interface that realizes connection with the NGC side and the like.
- the NW IF unit 53 may include interfaces such as X2, Xn, N2, N3.
- the lower node connection unit 55 provides an interface that realizes connection with nodes lower than the IAB donor.
- the lower node means a wireless communication node located on the end user side (which may be called downstream side or downstream side) than the IAB donor, and wireless communication node 100 (parent node) and wireless communication node 150 ( IAB node) may be included.
- the wireless link in the lower node is not the wireless link between the IAB donor (wireless communication node 50) and the parent node (wireless communication node 100), but the link between the parent node (wireless communication node 100) and the IAB node (wireless communication node 100). It may mean a wireless link with the node 150).
- the control unit 57 controls each functional block that configures the wireless communication node 50 .
- the control unit 57 executes DC and controls the DC between the wireless communication node 100 that configures the master node (MN) and the wireless communication node 100 that configures the secondary node (SN). can.
- control unit 57 controls notification of information (beam information) on the antenna beam BM used by the IAB nodes (IAB-MT and IAB-DU). Specifically, the control unit 57 can notify the beam information applied to the parent node and/or the IAB node via the lower node connection unit 55 .
- TCI Transmission Configuration Indication
- TCI state may mean that it is explicitly set by the control element (MAC CE) of the radio resource control layer (RRC) or medium access control layer (MAC).
- QCL relationships may include both cases where the TCI state is explicitly set and cases where the TCI state is not set.
- QCL/TCI state/beam (antenna beam) may be read interchangeably.
- Beam information may include any information related to such QCL/TCI state/beam.
- it may be an index (SSB index) that identifies an SSB (SS/PBCH Block), which is a synchronization signal/broadcast channel block composed of SS (Synchronization Signal) and PBCH (Physical Broadcast CHannel).
- SSB index identifies an SSB (SS/PBCH Block) that identifies an SSB (SS/PBCH Block), which is a synchronization signal/broadcast channel block composed of SS (Synchronization Signal) and PBCH (Physical Broadcast CHannel). Beam information will be described further below.
- FIG. 3 is a functional block configuration diagram of the radio communication node 100 that constitutes the parent node and the radio communication node 150 that constitutes the IAB node.
- the functions of the wireless communication node 100 will be mainly described below.
- the wireless communication node 100 includes a wireless communication unit 110, an upper node connection unit 170, a lower node connection unit 180 and a control unit 190.
- the radio communication unit 110 transmits and receives radio signals according to NR.
- the radio communication unit 110 controls radio (RF) signals transmitted from multiple antenna elements to generate beams with higher directivity, Massive MIMO, and carrier aggregation that uses multiple component carriers (CC). (CA), and dual connectivity (DC) in which communication is performed simultaneously between the UE and each of the two NG-RAN Nodes.
- RF radio
- Massive MIMO Massive MIMO
- CC component carriers
- DC dual connectivity
- the wireless communication unit 110 may receive beam information regarding the antenna beam BM.
- the radio communication unit 110 may receive beam information (first beam information) regarding the antenna beam BM of the DU (first unit) of the lower node (which may include the IAB node).
- the radio communication unit 110 may constitute a receiving unit.
- the IAB-DU is associated with the first unit, but the first unit may be called by other names such as the downstream unit and distributed unit.
- the IAB-MT is associated with the second unit, but the second unit may be called by other names such as an upstream unit or a terminal termination unit.
- the wireless communication unit 110 may receive beam information regarding the antenna beam BM of the IAB-DU of the own node from the upper node (parent node).
- the upper node connection unit 170 provides an interface for realizing connection with nodes higher than the parent node.
- a higher node means a wireless communication node located on the network, more specifically, on the core network side (which may also be called the upstream side or upstream side) than the parent node.
- the upper node connection unit 170 provides an interface for realizing connection with nodes higher than the IAB node.
- a higher node means a wireless communication node located on the network side, specifically, on the core network side (which may also be called upstream or upstream side) than the IAB node.
- the upper node connection unit 170 provides a Mobile Termination (MT) function.
- MT Mobile Termination
- the higher node connection unit 170 may be used for connection with higher nodes in this embodiment.
- the lower node connection unit 180 provides an interface for realizing connection with nodes lower than the parent node.
- a lower node means a wireless communication node located on the end-user side (which may also be referred to as the downstream side or downstream side) from the IAB node.
- the lower node connection unit 180 provides a Distributed Unit (DU) function. That is, in this embodiment, the lower node connection unit 180 is used for connection with the IAB node or child node (which may be the UE 200) that configures the lower node.
- DU Distributed Unit
- the control unit 190 executes control of each functional block that configures the wireless communication node 150.
- the control unit 190 can perform control regarding the antenna beam BM of the IAB node (child node).
- control unit 190 may hold beam information (first beam information) regarding the antenna beam BM of the IAB-DU.
- the control unit 190 can hold the beam information received from the CU or the like via the upper node connection unit 170 .
- control unit 190 obtains beam information (second beam information) regarding the second unit of the lower node (IAB node), that is, the antenna beam BM of the IAB-MT, according to the operation specified in 3GPP TS38.213. can recognize.
- the control unit 190 may hold beam information (first beam information) regarding the antenna beam BM of the IAB-DU and beam information (second beam information) regarding the antenna beam BM of the IAB-MT.
- the control unit 190 may set the antenna beam BM used by the IAB-DU based on the first beam information and the second beam information.
- the antenna beam BM used by the IAB-DU may be different from the antenna beam BM used by the IAB-MT, or may partially or wholly overlap.
- Control unit 190 may set the antenna beam BM used by .
- control unit 190 sets the antenna beam BM used by the IAB-MT of the own node based on the beam information received from the parent node (wireless communication node 100). good.
- the antenna beam BM used by the IAB-MT may be different from the antenna beam BM used by the IAB-DU, or may partially or wholly overlap.
- the parent node assigns a set of desirable and/or undesirable (hereinafter denoted desirable (or undesirable)) antenna beams BM in the IAB-DU to child nodes (including IAB nodes). ) to achieve simultaneous transmission of IAB-MT and IAB-DU.
- desirable (or undesirable) a set of desirable and/or undesirable antenna beams BM in the IAB-DU to child nodes (including IAB nodes).
- the parent node may measure the interference between the MT's transmit (Tx) beam and the DU's transmit (Tx) beam. This allows the parent node to indicate to the IAB node which DU's Tx beams cause significant interference to the MT's Tx beams. Note that how the parent node measures interference depends on the implementation.
- Fig. 4 shows an example of a schematic communication sequence for controlling the antenna beams BM of IAB-MT and IAB-DU.
- the parent node can inform the IAB-DU which antenna beam to use.
- the parent node and the IAB node may operate as follows.
- the parent node holds information about the antenna beam of the IAB node (child node) (for example, it may be notified from the CU or reported from the IAB node (step 1 ( 1′), 2).
- the parent node can recognize the information about the IAB-MT antenna beam by existing operation (see 3GPP TS38.213).
- the information about the IAB-DU antenna beam may be recognized by operation example 0.
- the upper node uses the beam information of IAB-MT and IAB-DU acquired by the operation example 0 and the information on the antenna beam of IAB-MT with the existing operation, for example, the antenna beam of IAB-DU is interference. It is possible to recognize the combination with the IAB-MT antenna beam.
- a higher node may notify (instruct) the information about the antenna beam to the IAB node (in FIG. 4 steps 3, 4).
- ⁇ (Operation example 1): The parent node sets the desired (or undesired) beam as the antenna beam set by the IAB-DU for the IAB node (child node).
- PUSCH Physical Uplink Shared Channel
- CB Code Block
- NCB Non CB
- SRI SRS resource indicator
- DCI downlink control information
- IAB-DU antenna beams desirable (or undesired) for simultaneous transmission are set.
- the operation of the IAB node (step 5 in Fig. 4) may be as follows.
- IAB nodes do not use beams that have been signaled as undesirable for IAB-DU antenna beams when transmitting IAB-MTs.
- the setting of the IAB-DU antenna beam may be dependent on the implementation of the IAB-DU.
- Operation example 2 The operation of the IAB node in operation example 1 is set according to the IAB-DU resource type (H/S/NA) or channel, and the MT channel. Also, operation example 1 is applied when IAB-DU and IAB-MT operate simultaneously.
- the parent node may know the transmission configuration of the SSBs (which may be interpreted as antenna beams) for each DU cell of the child node DU.
- Such transmission configuration information may be provided from the IAB donor CU via F1-AP signaling.
- an IAB STC (SSB transmission configuration) Info IE information element may be used.
- the information may be provided from the IAB-MT to the parent node.
- the information includes the number of SSBs, the SSB index, the position of the SSBs in time (e.g. periodicity or offset), the position of the SSBs in frequency, and a bit indicating whether the SSBs are transmitted or need to be measured.
- Maps (such as the SSB-ToMeasure IE of 3GPP TS 38.331, which may include the same information as the IAB STC Info IE of 3GPP TS 38.473), etc. (at least any of them) may be included.
- the parent node may recognize the CSI-RS/SRS resource configuration of each DU cell of the child node DU.
- Such configuration information may be provided by the IAB donor CU via F1-AP signaling.
- the information may be provided from the IAB-MT to the parent node.
- the information includes the number of CSI-RS resources, the index of the CSI-RS resources, the position of the CSI-RS resources in the time direction (eg, periodicity and offset), the position of the CSI-RS resources in the frequency, PDSCH RE (Resource Element ) to CSI-RS RE, power control offset from CSI-RS RE to SSS RE, QCL information for CSI-RS resources (CSI-ResourceConfig/NZP-CSI-RS-ResourceSet/NZP- It may include information similar to the CSI-RS-Resource IE), etc. (at least any of them may be included).
- the parent node may recognize the relationship between MT beams and DU beams. For example, whether or not the MT beam and the DU beam are beams transmitted from the same antenna panel, whether or not the MT beam and the DU beam can be transmitted simultaneously, and the like may be included.
- the DCI of the TCI field in the DCI of the MT serving cell/SSB/CSI-RS/SRS/Release (Rel)-17 of the SRI field of the codepoint/UL TCI/Rel-17 Reference may be made to the joint UL and UL TCI/Codepoints.
- the DU beam may refer to the SSB/CSI-RS/SRS of the DU cell.
- a parent node may indicate to a child node a set of desired (or undesired) beams in the child node's IAB-DU.
- the IAB-DU beam may be supplied as DU SSB index, DU cell index and (DU ID).
- the IAB-DU beam may be provided as DU CSI-RS/SRS resource index, DU cell index and (DU ID).
- DU ID may or may not be required in some cases.
- Option 1 A set of desired (or undesired) beams in the IAB-DU is provided for each MT serving cell.
- At least one of RRC, MAC CE, or DCI may be used for the instruction.
- An IAB node may also operate as follows.
- the DUs may not perform transmissions with the same spatial relationship as the DU beams designated as 'unwanted' for the MT serving cell.
- the DU may only perform transmissions that have the same spatial relationship as the DU beam designated as "preferred" for the MT serving cell.
- a set of desired (or undesired) beams in IAB-DU may be provided for a group of MT serving cells.
- Option 2 A set of desired (or undesired) beams in IAB-DU is provided for each SSB/CSI-RS/SRS of each MT serving cell.
- SSB/CSI-RS/SRS is the RS (reference signal) that is the basis of the spatial relationship of UL transmission in MT. Specifically, SSB/CSI-RS is transmitted from the parent node and received in MT. be done. SRS is sent from MT and received at the parent node.
- At least one of RRC, MAC CE, or DCI may be used for the instruction.
- An IAB node may also operate as follows.
- the DU is indicated as 'not desirable' for the MT's SSB/CSI-RS/SRS
- the transmission cannot be configured/directed by the same spatial relationship as the DU beam.
- the DU is indicated as "preferred" to the MT's SSB/CSI-RS/SRS. Only this transmission may be performed with the same spatial relationship as the DU beam.
- a set of desired (or undesired) beams in IAB-DU may be provided for groups of SSB/CSI-RS/SRS.
- Option 3 For CB/NCB PUSCH transmission, a set of desired (or undesired) beams in IAB-DU is provided for each SRI codepoint of the SRI field in DCI.
- the SRI codepoint may indicate a CB SRS resource).
- an SRI codepoint may indicate a combination of one or more NCB SRS resources and NCB SRS resources.
- At least one of RRC, MAC CE, or DCI may be used for the instruction.
- An IAB node may also operate as follows.
- the DU performs a transmission that has the same spatial relationship as the DU beam indicated as 'unwanted' for the SRI codepoint in the MT you don't have to
- the DU shall only perform transmissions that have the same spatial relationship as the DU beam indicated as "preferred" for the SRI codepoint in the MT. you can
- a set of desired (or undesired) beams in IAB-DU may be provided for group codepoints of SRI.
- PUCCH-spatialRelationInfo is specified in 3GPP TS38.331, and may be used to configure parameters for PUCCH transmission spatial settings and PUCCH power control (3GPP TS38.213 Section 9.2.2).
- At least one of RRC, MAC CE, or DCI may be used for the instruction.
- An IAB node may also operate as follows.
- the DU shall not perform transmissions that have the same spatial relationship as the DU beams indicated as 'unwanted' for the pucch-spatialRelation of the MT. you can
- the DU shall only perform transmissions that have the same spatial relationship as the DU beams indicated as "preferred" for the pucch-spatialRelation of the MT. good.
- a set of desired (or undesired) beams in IAB-DU may be provided for a group of PUCCH spatial relationships.
- a set of desired (or undesired) beams in the IAB-DU is provided for each Rel-17 UL TCI state, or joint DL/UL TCI state, of each MT serving cell.
- each UL TCI state and joint DL/UL TCI state set by RRC, or each UL TCI state and joint DL/UL TCI state activated by MAC CE may be used.
- At least one of RRC, MAC CE, or DCI may be used for the instruction.
- An IAB node may also operate as follows.
- DU is the same as DU beam indicated as 'unwanted' for UL TCI or joint DL/UL TCI in MT Transmissions with spatial relationships need not be performed.
- the DU is in the same space as the DU beam designated as "preferred" for the MT's UL TCI or joint DL/UL TCI Only relevant transmissions may be performed.
- a set of desired (or undesired) beams in IAB-DU may be provided for a group of UL TCIs or MT joint DL/UL TCIs.
- a set of desired (or undesired) beams in the IAB-DU is the DCI of each MT serving cell (each TCI codepoint indicates Rel-17 UL TCI or Rel-17 joint UL/DL TCI ) for each TCI codepoint in the TCI field.
- At least one of RRC, MAC CE, or DCI may be used for the instruction.
- An IAB node may also operate as follows.
- the DU performs a transmission that has the same spatial relationship as the DU beam indicated as 'unwanted' for the TCI codepoint in the MT you don't have to
- the DU only performs transmissions that have the same spatial relationship as the DU beam indicated as "preferred" for the TCI codepoint in the MT You can
- a set of desired (or undesired) beams in IAB-DU may be provided for a group of MT TCI codepoints.
- At least any of options 1-6 described above may be supported. Additionally, at least one of the following options may be supported.
- ⁇ Define the number (or maximum number) of MT serving cells that can serve a set of desired (or undesired) beams in the IAB-DU.
- ⁇ Define the number (or maximum number) of MT beams that can provide a set of desired (or undesired) beams in the IAB-DU.
- ⁇ Define the number (or maximum number) of MT beams for each MT.
- MT beams may refer to MT SSB/CSI-RS/SRS/SRI codepoints/PUCCH-spatialrelationInfo/UL TCI/joint UL or DL TCI/TCI codepoints, as in options 2 to 6.
- ⁇ Define the number (or maximum number) of DU beams per DU.
- ⁇ Alternatively, define the number (or maximum number) of DU beams per DU cell.
- the DU beam may be associated with the MT beam.
- the association may be set by higher layer (eg, RRC) signaling.
- the relationship may be recognized by parent nodes and child nodes.
- the parent node instead of indicating the DU SSB/CSI-RS/SRS resource index, DU cell index and (DU ID), the parent node indicates the desired (or undesired) beam in the child node's IAB-DU to the desired (or undesired) It may be indicated (which may be implicit) by indicating the MT beam.
- the DU shall not transmit in a spatial relationship as the DU beam relative to the MT beam when there is an MT transmission configured/directed in the spatial relationship of the MT beam. good.
- the DUs are transmitting in a spatial relationship as the DU beam relative to the MT beam. good.
- the ⁇ MT beam, DU beam ⁇ pair may be set by higher layer signaling and recognized by the parent node and its child nodes.
- the parent node may indicate the preferred and/or undesirable beams in the child node's IAB-DU ⁇ It may be indicated (which may be implicit) by indicating the MT beam, DU beam ⁇ pair.
- a ⁇ MT beam, DU beam ⁇ pair is indicated as undesirable, then when there is an MT transmission configured/directed in the spatial relationship of the MT beams within the beam pair, the DU is in the spatial relationship as the DU beam within the beam pair You don't have to send with
- Operation example 2 The behavior (operation) of the IAB node in Operation Example 1 may differ depending on options and the like.
- H/S/NA DU time domain
- H/S/NA DU frequency domain
- PDSCH/PDCCH/(periodic/semi-permanent/aperiodic) CSI-RS/SSB may be applied to different DU channels/RS, namely PDSCH/PDCCH/(periodic/semi-permanent/aperiodic) CSI-RS/SSB.
- operation example 1 may be applied only to the MT serving cell and the DU cell that simultaneously support MT transmission and DU transmission.
- IAB Node Capabilities The following capabilities may be defined for IAB nodes.
- IAB node may report this capability to the network. Also, such capability reporting may only apply if the corresponding IAB node function and/or higher layer parameters are configured.
- the parent node stores beam information (first beam information) regarding the IAB-DU antenna beam BM and beam information (second beam information) regarding the IAB-MT antenna beam BM. can hold
- the IAB node can set the antenna beam BM used by the IAB-MT of its own node based on the beam information received from the parent node (wireless communication node 100).
- the parent node can recognize more detailed information about the antenna beams of the IAB nodes, including the IAB node (DU), and can direct the IAB node to the appropriate antenna beam. This makes it possible to more reliably avoid the IAB-DU transmission signal from interfering with the IAB-MT transmission signal.
- the names of the parent node, the IAB node, and the child node were used.
- the names may be different as long as the node configuration is adopted. For example, they may simply be called first and second nodes, or they may be called upper nodes, lower nodes, relay nodes, intermediate nodes, and 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.
- configure, activate, update, indicate, enable, specify, and select may be read interchangeably. good.
- link, associate, correspond, and map may be read interchangeably to allocate, assign, monitor. , map, may also be read interchangeably.
- precoding "precoding weight”
- QCL quadsi-co-location
- TCI state Transmission Configuration Indication state
- spatialal patial relation
- spatialal domain filter "transmission power”
- phase rotation "antenna port
- antenna port group "layer”
- number of layers Terms such as “rank”, “resource”, “resource set”, “resource group”, “beam”, “beam width”, “beam angle”, “antenna”, “antenna element”, “panel” are interchangeable. can be used as intended.
- each functional block may be implemented using one device physically or logically coupled, or directly or indirectly using two or more physically or logically separate devices (e.g. , wired, wireless, etc.) and may be implemented using these multiple devices.
- a functional block may be implemented by combining software in the one device or the plurality of devices.
- Functions include judging, determining, determining, calculating, calculating, processing, deriving, investigating, searching, checking, receiving, transmitting, outputting, accessing, resolving, selecting, choosing, establishing, comparing, assuming, expecting, assuming, Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc. can't
- a functional block (component) that performs transmission is called a transmitting unit or transmitter.
- the implementation method is not particularly limited.
- FIG. 5 is a diagram showing an example of the hardware configuration of the device. As shown in FIG. 5, the device may be configured as a computer device including processor 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, and the like.
- the term "apparatus” can be read as a circuit, device, unit, or the like.
- the hardware configuration of the device may be configured to include one or more of each device shown in the figure, or may be configured without some of the devices.
- Each functional block of the device (see FIGS. 2 and 3) is realized by any hardware element of the computer device or a combination of the hardware elements.
- each function of the device is implemented by causing the processor 1001 to perform calculations, controlling communication by the communication device 1004, and controlling the It is realized by controlling at least one of data reading and writing in 1002 and storage 1003 .
- a processor 1001 operates an operating system and controls the entire computer.
- the processor 1001 may be configured with a central processing unit (CPU) including interfaces with peripheral devices, a controller, arithmetic units, registers, and the like.
- CPU central processing unit
- the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to them.
- programs program codes
- software modules software modules
- data etc.
- the various processes described above may be executed by one processor 1001, or may be executed by two or more processors 1001 simultaneously or sequentially.
- Processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via an electric communication line.
- the memory 1002 is a computer-readable recording medium, and is composed of at least one of Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), Random Access Memory (RAM), etc. may be
- ROM Read Only Memory
- EPROM Erasable Programmable ROM
- EEPROM Electrically Erasable Programmable ROM
- RAM Random Access Memory
- the memory 1002 may also be called a register, cache, main memory (main storage device), or the like.
- the memory 1002 can store programs (program code), software modules, etc. capable of executing a method according to an embodiment of the present disclosure.
- the storage 1003 is a computer-readable recording medium, for example, an optical disc such as a Compact Disc ROM (CD-ROM), a hard disk drive, a flexible disc, a magneto-optical disc (for example, a compact disc, a digital versatile disc, a Blu-ray disk), smart card, flash memory (eg, card, stick, key drive), floppy disk, magnetic strip, and/or the like.
- Storage 1003 may also be referred to as an auxiliary storage device.
- the recording medium described above may be, for example, a database, server, or other suitable medium including at least one of memory 1002 and storage 1003 .
- the communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, or the like.
- the communication device 1004 includes a high-frequency switch, duplexer, filter, frequency synthesizer, etc., for realizing at least one of frequency division duplex (FDD) and time division duplex (TDD).
- FDD frequency division duplex
- TDD time division duplex
- the input device 1005 is an input device (for example, keyboard, mouse, microphone, switch, button, sensor, etc.) that receives input from the outside.
- the output device 1006 is an output device (eg, display, speaker, LED lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated (for example, a touch panel).
- each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information.
- the bus 1007 may be configured using a single bus, or may be configured using different buses between devices.
- the device includes hardware such as a microprocessor, digital signal processor (DSP), application specific integrated circuit (ASIC), programmable logic device (PLD), field programmable gate array (FPGA), etc.
- DSP digital signal processor
- ASIC application specific integrated circuit
- PLD programmable logic device
- FPGA field programmable gate array
- notification of information is not limited to the aspects/embodiments described in the present disclosure, and may be performed using other methods.
- the notification of information may include physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI), higher layer signaling (e.g., RRC signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), other signals, or combinations thereof, and RRC signaling may also be referred to as RRC messages, e.g., RRC Connection Setup ) message, RRC Connection Reconfiguration message, or the like.
- DCI Downlink Control Information
- UCI Uplink Control Information
- RRC signaling e.g., RRC signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), other signals, or combinations thereof
- RRC signaling may also be referred to as RRC messages, e.g., RRC Connection Setup ) message, R
- LTE Long Term Evolution
- LTE-A LTE-Advanced
- SUPER 3G IMT-Advanced
- 4G 4th generation mobile communication system
- 5G 5th generation mobile communication system
- Future Radio Access FAA
- New Radio NR
- 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®, other suitable systems, and/or next-generation systems enhanced therefrom.
- a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G).
- a specific operation that is performed by a base station in the present disclosure may be performed by its upper node in some cases.
- various operations performed for communication with a terminal may be performed by the base station and other network nodes other than the base station (e.g. MME or S-GW, etc., but not limited to).
- MME or S-GW network nodes
- the case where there is one network node other than the base station is exemplified above, it may be a combination of a plurality of other network nodes (for example, MME and S-GW).
- Information, signals can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). It may be input and output via multiple network nodes.
- Input/output information may be stored in a specific location (for example, memory) or managed using a management table. Input and output information may be overwritten, updated, or appended. 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 numerical comparison (for example, a predetermined value).
- notification of predetermined information is not limited to being performed explicitly, but may be performed implicitly (for example, not notifying the predetermined information). good too.
- Software whether referred to as software, firmware, middleware, microcode, hardware description language or otherwise, includes instructions, instruction sets, code, code segments, program code, programs, subprograms, and software modules. , applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.
- software, instructions, information, etc. may be transmitted and received via a transmission medium.
- the Software uses wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and/or wireless technology (infrared, microwave, etc.) to access websites, Wired and/or wireless technologies are included within the definition of transmission medium when sent from a server or other remote source.
- wired technology coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.
- wireless technology infrared, microwave, etc.
- data, instructions, commands, information, signals, bits, symbols, chips, etc. may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. may be represented by a combination of
- the channel and/or symbols may be signaling.
- a signal may also be a message.
- a component carrier may also be called a carrier frequency, a cell, a frequency carrier, or the like.
- system and “network” used in this disclosure are used interchangeably.
- information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values from a predetermined value, or may be expressed using other corresponding information.
- radio resources may be indexed.
- base station BS
- radio base station fixed station
- NodeB NodeB
- eNodeB eNodeB
- gNodeB gNodeB
- a base station may also be referred to by terms such as macrocell, small cell, femtocell, picocell, and the like.
- a base station can accommodate one or more (eg, three) cells (also called sectors). When a base station accommodates multiple cells, the overall coverage area of the base station can be partitioned into multiple smaller areas, each smaller area corresponding to a base station subsystem (e.g., a small indoor base station (Remote Radio)). Head: RRH) can also provide communication services.
- a base station subsystem e.g., a small indoor base station (Remote Radio)
- Head: RRH can also provide communication services.
- cell refers to part or all of the coverage area of at least one of a base station and base station subsystem that provides communication services in this coverage.
- MS Mobile Station
- UE User Equipment
- a mobile station is defined by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless It may also be called a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.
- At least one of the base station and 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 a mobile object, the mobile object itself, or the like.
- the mobile body may be a vehicle (e.g., car, airplane, etc.), an unmanned mobile body (e.g., drone, self-driving car, etc.), or a robot (manned or unmanned ).
- at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations.
- at least one of the base station and 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, hereinafter the same).
- communication between a base station and a mobile station is replaced with communication between multiple mobile stations (for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.)
- the mobile station may have the functions that the base station has.
- words such as "up” and “down” may be replaced with words corresponding to inter-terminal communication (for example, "side”).
- uplink channels, downlink channels, etc. may be read as side channels.
- a mobile station in the present disclosure may be read as a base station.
- the base station may have the functions that the mobile station has.
- a radio frame may consist of one or more frames in the time domain.
- Each of one or more frames in the time domain may be called a subframe.
- a subframe may also consist of one or more slots in the time domain.
- a subframe may have a fixed time length (eg, 1 ms) that does not depend on numerology.
- a numerology may be a communication parameter that applies to the transmission and/or reception of a signal or channel. Numerology, for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, transmission and reception specific filtering operations performed by the receiver in the frequency domain, specific windowing operations performed by the transceiver in the time domain, and/or the like.
- SCS subcarrier spacing
- TTI transmission time interval
- number of symbols per TTI radio frame structure
- transmission and reception specific filtering operations performed by the receiver in the frequency domain specific windowing operations performed by the transceiver in the time domain, and/or the like.
- a slot may consist 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.
- OFDM Orthogonal Frequency Division Multiplexing
- SC-FDMA Single Carrier Frequency Division Multiple Access
- a slot may be a unit of time based on numerology.
- a slot may contain multiple mini-slots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be referred to as a subslot. A minislot may consist of fewer symbols than a slot.
- a PDSCH (or PUSCH) that is transmitted in time units larger than a minislot may be referred to as PDSCH (or PUSCH) mapping type A.
- PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (or PUSCH) mapping type B.
- Radio frames, subframes, slots, minislots and symbols all represent time units when transmitting signals. Radio frames, subframes, slots, minislots and symbols may be referred to by other corresponding designations.
- one subframe may be called a transmission time interval (TTI)
- TTI transmission time interval
- multiple consecutive subframes may be called a TTI
- one slot or one minislot may be called a TTI. That is, at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, may be a period shorter than 1ms (eg, 1-13 symbols), or a period longer than 1ms may be Note that the unit representing the TTI may be called a slot, minislot, or the like instead of a subframe.
- TTI refers to, for example, the minimum scheduling time unit in wireless communication.
- a base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each user terminal) to each user terminal on a TTI basis.
- radio resources frequency bandwidth, transmission power, etc. that can be used by each user terminal
- the TTI may be a transmission time unit for channel-encoded data packets (transport blocks), code blocks, codewords, etc., or may be a processing unit for scheduling, link adaptation, etc. Note that when a TTI is given, the time interval (for example, the number of symbols) in which transport blocks, code blocks, codewords, etc. are actually mapped may be shorter than the TTI.
- one slot or one minislot is called a TTI
- one or more TTIs may be the minimum scheduling time unit.
- the number of slots (the number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
- a TTI with a time length of 1 ms may be called a normal TTI (TTI in LTE Rel.8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc.
- TTI that is shorter than a regular TTI may also be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, and so on.
- long TTI for example, normal TTI, subframe, etc.
- short TTI for example, shortened TTI, etc.
- a TTI having a TTI length greater than or equal to this value may be read as a replacement.
- a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain.
- the number of subcarriers included in the RB may be the same regardless of the neumerology, and may be 12, for example.
- the number of subcarriers included in an RB may be determined based on neumerology.
- the time domain of an RB may include one or more symbols and may be 1 slot, 1 minislot, 1 subframe, or 1 TTI long.
- One TTI, one subframe, etc. may each consist of one or more resource blocks.
- One or more RBs are physical resource blocks (Physical RB: PRB), sub-carrier groups (SCG), resource element groups (REG), PRB pairs, RB pairs, etc. may be called.
- PRB Physical resource blocks
- SCG sub-carrier groups
- REG resource element groups
- PRB pairs RB pairs, etc.
- a resource block may be composed of one or more resource elements (Resource Element: RE).
- RE resource elements
- 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.
- a Bandwidth Part (which may also be called a Bandwidth Part) represents a subset of contiguous common resource blocks (RBs) for a neumerology in a carrier. good.
- the common RB may be identified by an RB index based on 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 may include BWP for UL (UL BWP) and BWP for DL (DL BWP).
- One or more BWPs may be configured in one carrier for a UE.
- At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal/channel outside the active BWP.
- BWP bitmap
- radio frames, subframes, slots, minislots and symbols described above are only examples.
- the number of subframes included in a radio frame the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of Configurations such as the number of subcarriers and the number of symbols in a TTI, symbol length, cyclic prefix (CP) length, etc.
- CP cyclic prefix
- connection means any direct or indirect connection or coupling between two or more elements, It can include the presence of one or more intermediate elements between two elements being “connected” or “coupled.” Couplings or connections between elements may be physical, logical, or a combination thereof. For example, “connection” may be read as "access”.
- two elements are defined using at least one of one or more wires, cables and printed electrical connections and, as some non-limiting and non-exhaustive examples, in the radio frequency domain. , electromagnetic energy having wavelengths in the microwave and light (both visible and invisible) regions, and the like.
- the reference signal can also be abbreviated as Reference Signal (RS), and may also be called Pilot depending on the applicable standard.
- RS Reference Signal
- any reference to elements using the "first,” “second,” etc. designations used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, references to first and second elements do not imply that only two elements may be employed therein or that the first element must precede the second element in any way.
- determining and “determining” used in this disclosure may encompass a wide variety of actions.
- “Judgement” and “determination” are, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (eg, lookup in a table, database, or other data structure), ascertaining as “judged” or “determined”, and the like.
- "judgment” and “determination” are used for receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, access (accessing) (for example, accessing data in memory) may include deeming that a "judgment” or “decision” has been made.
- judgment and “decision” are considered to be “judgment” and “decision” by resolving, selecting, choosing, establishing, comparing, etc. can contain.
- judgment and “decision” may include considering that some action is “judgment” and “decision”.
- judgment (decision) may be read as “assuming”, “expecting”, “considering”, or the like.
- a and B are different may mean “A and B are different from each other.”
- the term may also mean that "A and B are different from C”.
- Terms such as “separate,””coupled,” etc. may also be interpreted in the same manner as “different.”
- Radio communication system 20 NG-RAN 50 wireless communication node 51 wireless communication unit 53 NW IF unit 55 lower node connection unit 57 control unit 100 wireless communication node 110 wireless communication unit 150 wireless communication node 170 upper node connection unit 180 lower node connection unit 190 control unit 200 UE 1001 Processor 1002 Memory 1003 Storage 1004 Communication Device 1005 Input Device 1006 Output Device 1007 Bus
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Abstract
Description
図1は、本実施形態に係る無線通信システム10の全体概略構成図である。無線通信システム10は、5G New Radio(NR)に従った無線通信システムであり、複数の無線通信ノード及び端末によって構成される。なお、無線通信システム10は、Beyond 5G、5G Evolution或いは6Gと呼ばれる方式に従った無線通信システムでもよい。
次に、無線通信システム10の機能ブロック構成について説明する。具体的には、無線通信ノード50、無線通信ノード100及び無線通信ノード150の機能ブロック構成について説明する。
図2は、IABドナーを構成する無線通信ノード50の機能ブロック構成図である。図2に示すように、無線通信ノード50は、無線通信部51、NW IF部53、下位ノード接続部55及び制御部57を備える。
図3は、親ノードを構成する無線通信ノード100、及びIABノードを構成する無線通信ノード150の機能ブロック構成図である。以下、無線通信ノード100の機能について主に説明する。
次に、無線通信システム10の動作について説明する。具体的には、IAB-MT及びIAB-DUのアンテナビームBMの制御に関する動作について説明する。
IAB-MTとIAB-DUとの同時送信に関して、親ノードのDUの受信時におけるIAB-DUの送信信号のIAB-MTに対する干渉対策として、親ノードがIAB-MTのアンテナビーム指示に加え、IAB-DUのアンテナビームの指示をすることが想定される。
(3.2.0)動作例0
親ノードは、子ノードDUの各DUセルのSSB(アンテナビームと解釈されてもよい)の送信構成を認識してよい。当該送信構成の情報は、F1-APシグナリングを介してIABドナーCUから提供されてよい。例えば、IAB STC (SSB transmission configuration) Info IE(情報要素)が用いられてよい。
(例えば、周期性やオフセット)、CSI-RSリソースの周波数における位置、PDSCH RE (Resource Element)からCSI-RS REへの電力制御オフセット、CSI-RS REからSSS REへの電力制御オフセット、CSI-RSリソースのQCL情報(TS 38.331のCSI-ResourceConfig/NZP-CSI-RS-ResourceSet/NZP-CSI-RS-Resource IEと同様の情報を含むことがあってもよい)など(少なくとも何れかでよい)を含んでよい。
joint UL及びUL TCI/コードポイントが参照されてよい。
親ノードは、子ノードのIAB-DUにおける一組の望ましい(または望ましくない)ビームを子ノードに指示してよい。
・MTサービングセル単位
・DU単位
・DUセル単位
動作例1の変更例として、DUビームは、MTビームと関連してよい。関連性は、上位レイヤ(例えば、RRC)のシグナリングによって設定されてよい。親ノードと子ノードによって当該関連性が認識されてよい。
動作例1におけるIABノードの挙動(動作)は、オプションなどに応じて異なってよい。
なお、動作例1は、MT送信とDU送信とを同時にサポートするMTサービングセル及びDUセルのみに適用されてよい。
IABノードに関して、次のような能力(capability)が定義されてもよい。
・DUビームの制限のサポート有無
IABノードは、ネットワークに対して当該能力を報告してよい。また、このような能力の報告は、対応するIABノード機能及び/または上位レイヤのパラメータが設定されている場合にのみ適用されてもよい。
上述した実施形態によれば、以下の作用効果が得られる。具体的には、親ノード(無線通信ノード100)は、IAB-DUのアンテナビームBMに関するビーム情報(第1ビーム情報)と、IAB-MTのアンテナビームBMに関するビーム情報(第2ビーム情報)とを保持できる。
以上、実施例に沿って本発明の内容を説明したが、本発明はこれらの記載に限定されるものではなく、種々の変形及び改良が可能であることは、当業者には自明である。
「離れる」、「結合される」などの用語も、「異なる」と同様に解釈されてもよい。
20 NG-RAN
50 無線通信ノード
51 無線通信部
53 NW IF部
55 下位ノード接続部
57 制御部
100 無線通信ノード
110 無線通信部
150 無線通信ノード
170 上位ノード接続部
180 下位ノード接続部
190 制御部
200 UE
1001 プロセッサ
1002 メモリ
1003 ストレージ
1004 通信装置
1005 入力装置
1006 出力装置
1007 バス
Claims (6)
- 下位ノードの第1ユニットのアンテナビームに関する第1ビーム情報を受信する受信部と、
前記第1ビーム情報と、前記下位ノードの第2ユニットのアンテナビームに関する第2ビーム情報とを保持する制御部と
を備える無線通信ノード。 - 前記制御部は、前記第1ビーム情報と前記第2ビーム情報とに基づいて、前記第1ユニットが用いる前記アンテナビームを設定する請求項1に記載の無線通信ノード。
- 前記制御部は、前記第1ユニットに適用されるリソース種別、及び前記第1ユニットまたは前記第2ユニットに割り当てられるチャネルに応じて、前記第1ユニットが用いる前記アンテナビームを設定する請求項1に記載の無線通信ノード。
- 上位ノードから自ノードの第1ユニットのアンテナビームに関するビーム情報を受信する受信部と、
前記ビーム情報に基づいて、前記自ノードの第2ユニットが用いる前記アンテナビームを設定する制御部と
を備える無線通信ノード。 - 下位ノードの第1ユニットのアンテナビームに関する第1ビーム情報を受信するステップと、
前記第1ビーム情報と、前記下位ノードの第2ユニットのアンテナビームに関する第2ビーム情報とを保持するステップと
を含む無線通信方法。 - 上位ノードから自ノードの第1ユニットのアンテナビームに関するビーム情報を受信するステップと、
前記ビーム情報に基づいて、前記自ノードの第2ユニットが用いる前記アンテナビームを設定するステップと
を含む無線通信方法。
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Non-Patent Citations (2)
Title |
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3GPP: "3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Physical layer procedures for control (Release 16", 3GPP TS 38.213 V 16.1.0, March 2020 (2020-03-01) |
MODERATOR (AT&T): "Feature Lead Summary #2 of 8.10.1", 3GPP DRAFT; R1-2106055, vol. RAN WG1, 21 May 2021 (2021-05-21), pages 1 - 29, XP052013002 * |
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