WO2022039189A1 - 端末及び無線通信システム - Google Patents
端末及び無線通信システム Download PDFInfo
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- WO2022039189A1 WO2022039189A1 PCT/JP2021/030157 JP2021030157W WO2022039189A1 WO 2022039189 A1 WO2022039189 A1 WO 2022039189A1 JP 2021030157 W JP2021030157 W JP 2021030157W WO 2022039189 A1 WO2022039189 A1 WO 2022039189A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/15—Setup of multiple wireless link connections
Definitions
- the present invention relates to a terminal for transmitting and receiving messages of a wireless resource control layer and a wireless communication system.
- 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
- Non-Patent Document 1 For example, in 3GPP Release-17, expansion of Multi-RAT Dual Connectivity (MR-DC) is being considered (Non-Patent Document 1). Specifically, in order to realize more efficient addition or change of Primary SCell (PSCell), the procedure for adding / changing a conditional secondary cell (secondary node) (conditional PSCell addition / change) has been simplified. Support is being considered.
- PSCell Primary SCell
- conditional PSCell addition / change has the following problems.
- E-UTRA-NR Dual Connectivity EN-DC
- RRC Reconfiguration Complete the message (RRC Reconfiguration Complete) of the NR radio resource control layer (RRC) to the eNB which is the master node (MN).
- the MN determines which target secondary node (T-SN) should send the SgNB Reconfiguration Complete. Can not do it. Also, the MN cannot determine which T-SN the UE has accessed.
- the purpose is to provide a terminal and a wireless communication system capable of reliably executing changes.
- One aspect of the present disclosure includes a transmission / reception unit (RRC processing unit 220) for transmitting / receiving a message of the radio resource control layer, and the transmission / reception unit is a reset message of the radio resource control layer in a procedure for adding or changing a secondary cell. It is a terminal (UE200) that transmits dual connectivity information including the above to the network.
- RRC processing unit 220 for transmitting / receiving a message of the radio resource control layer
- the transmission / reception unit is a reset message of the radio resource control layer in a procedure for adding or changing a secondary cell.
- It is a terminal (UE200) that transmits dual connectivity information including the above to the network.
- One aspect of the present disclosure includes a transmission / reception unit (RRC processing unit 220) for transmitting / receiving a message of the radio resource control layer, and the transmission / reception unit is a reset message of the radio resource control layer in a procedure for adding or changing a secondary cell.
- RRC processing unit 220 for transmitting / receiving a message of the radio resource control layer
- the transmission / reception unit is a reset message of the radio resource control layer in a procedure for adding or changing a secondary cell.
- a terminal (UE200) that transmits another message of the radio resource control layer including the above to the network.
- FIG. 1 is an overall schematic configuration diagram of the wireless communication system 10.
- FIG. 2 is a functional block configuration diagram of the eNB 100A.
- FIG. 3 is a functional block configuration diagram of the UE 200.
- FIG. 4 is a diagram showing an example of a communication sequence (later data forwarding) according to a conventional conditional PSCell addition procedure (conditional PSCell addition).
- FIG. 5 is a diagram showing an example of a communication sequence (early data forwarding) according to a conventional conditional PSCell addition procedure (conditional PSCell addition).
- FIG. 6 is a diagram showing an example of a communication sequence (later data forwarding) according to a conditional inter-SN PSCell change procedure (SN-initiated conditional inter-SN PSCell change) led by an SN.
- FIG. 7 is a diagram showing a partial example of a communication sequence using the UL Information Transfer MRDC according to the operation example 1.
- FIG. 8 is a diagram showing a partial example of a communication sequence using the new RRC message according to the operation example 2.
- FIG. 9 is a diagram showing a configuration example of CondReconfigToAddModList.
- FIG. 10 is a diagram showing a configuration example of NRULInformationTransferMRDCmessage.
- FIG. 11 is a diagram showing a configuration example of the LTE ULInformation Transfer MRDC message.
- FIG. 12 is a diagram showing an example of the hardware configuration of eNB100A, gNB100B and UE200.
- 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 Long Term Evolution (LTE) and 5G New Radio (NR).
- LTE Long Term Evolution
- NR 5G New Radio
- LTE Long Term Evolution
- 4G Long Term Evolution
- 5G New Radio
- the wireless communication system 10 may be a wireless communication system according to a method called Beyond 5G, 5G Evolution or 6G.
- LTE and NR may be interpreted as radio access technology (RAT), and in this embodiment, LTE may be referred to as a first radio access technology and NR may be referred to as a second radio access technology.
- RAT radio access technology
- the wireless communication system 10 includes Evolved Universal Terrestrial Radio Access Network 20 (hereinafter, E-UTRAN20) and Next Generation-Radio Access Network 30 (hereinafter, NG RAN30). Further, the wireless communication system 10 includes a terminal 200 (hereinafter referred to as UE200, User Equipment).
- E-UTRAN20 Evolved Universal Terrestrial Radio Access Network 20
- NG RAN30 Next Generation-Radio Access Network 30
- UE200 User Equipment
- E-UTRAN20 includes eNB100A, which is a wireless base station that complies with LTE.
- NG RAN30 includes gNB100B, which is a radio base station according to 5G (NR).
- the E-UTRAN20 and NGRAN30 may be eNB100A or gNB100B) may be simply referred to as a network.
- the eNB100A, gNB100B and UE200 can support carrier aggregation (CA) using multiple component carriers (CC), and dual connectivity in which component carriers are simultaneously transmitted between multiple NG-RAN Nodes and UEs. ..
- CA carrier aggregation
- CC component carriers
- dual connectivity in which component carriers are simultaneously transmitted between multiple NG-RAN Nodes and UEs. ..
- the eNB100A, gNB100B and UE200 execute wireless communication via a wireless bearer, specifically, a Signaling Radio Bearer (SRB) or a DRB Data Radio Bearer (DRB).
- SRB Signaling Radio Bearer
- DRB DRB Data Radio Bearer
- the eNB 100A constitutes a master node (MN) and the gNB100B constitutes a secondary node (SN).
- MN master node
- SN secondary node
- Multi-Radio Dual Connectivity (MR-DC) specifically, E-UTRA-NR Dual Connectivity ( EN-DC) is executed.
- UE200 supports dual connectivity that connects to eNB100A and gNB100B.
- ENB100A is included in the master cell group (MCG), and gNB100B is included in the secondary cell group (SCG). That is, gNB100B is an SN contained in SCG.
- the eNB 100A and gNB 100B may be referred to as a radio base station or a network device.
- conditional addition or change (conditional PSCell addition / change) of Primary SCell may be supported.
- PSCell is a kind of secondary cell.
- PSCell means Primary SCell, and may be interpreted as corresponding to any SCell among a plurality of SCells.
- the secondary cell may be read as a secondary node (SN) or a secondary cell group (SCG).
- SN secondary node
- SCG secondary cell group
- Conditional PSCell addition / change can enable efficient and rapid addition or modification of secondary cells.
- Conditional PSCell addition / change may be interpreted as a procedure for adding / changing a conditional secondary cell with a simplified procedure.
- the wireless communication system 10 may support the conditional PSCell change procedure between SNs. Specifically, MN-led conditional inter-SN PSCell change and / or SN-led SN-initiated conditional inter-SN PSCell change may be supported.
- FIG. 2 is a functional block configuration diagram of the eNB 100A.
- the eNB 100A includes a wireless communication unit 110, an RRC processing unit 120, a DC processing unit 130, and a control unit 140.
- the wireless communication unit 110 transmits a downlink signal (DL signal) according to LTE. Further, the wireless communication unit 110 receives the uplink signal (UL signal) according to LTE.
- DL signal downlink signal
- UL signal uplink signal
- the RRC processing unit 120 executes various processes in the radio resource control layer (RRC). Specifically, the RRC processing unit 120 can transmit the RRC Reconfiguration to the UE 200. Further, the RRC processing unit 120 can receive the RRC Reconfiguration Complete, which is a response to the RRC Reconfiguration, from the UE 200.
- RRC radio resource control layer
- the eNB 100A supports LTE, but in this case, the name of the RRC message may be RRCConnectionReconfiguration or RRCConnectionReconfigurationComplete.
- the RRC processing unit 120 may include the cell ID of the Target PSCell, for example, the Cell Global Identifier (CGI) for each condReconfigId in the Conditional Reconfiguration included in the RRC Reconfiguration.
- CGI Cell Global Identifier
- the RRC layer may be set by such Conditional Reconfiguration.
- Information that can identify the SN (gNB100B) may be called gNBID) may be used instead of the CGI.
- the RRC processing unit 120 is a target SN to be added or changed based on the cell ID (for example, NR Physical Cell ID (PCI), NR CGI, or gNB ID) included in the ULInformationTransfer MRDC message transmitted from the UE 200. (T-SN) may be determined.
- the cell ID for example, NR Physical Cell ID (PCI), NR CGI, or gNB ID
- T-SN may be determined.
- a new RRC message may be used instead of the ULInformationTransferMRDC message.
- the RRC message may be called a bye-message.
- SgNB Reconfiguration complete may be transmitted to the T-SN based on the control by the control unit 140. Further, the control unit 140 may specify the T-SN based on the cell ID of the Target PSCell transmitted from the UE 200 and the frequency band in the NR.
- the DC processing unit 130 executes processing related to dual connectivity, specifically, Multi-RAT Dual Connectivity (MR-DC).
- MR-DC Multi-RAT Dual Connectivity
- the DC processing unit 130 may execute processing related to E-UTRA-NR Dual Connectivity (EN-DC).
- EN-DC E-UTRA-NR Dual Connectivity
- the type of DC is not limited, and for example, NR-E-UTRA Dual Connectivity (NE-DC) or NR-NR Dual Connectivity (NR-DC) may be supported.
- the DC processing unit 130 can send and receive messages specified in 3GPP TS37.340 and execute processing related to DC setting and release between eNB100A, gNB100B and UE200.
- the control unit 140 controls each functional block constituting the eNB 100A. In particular, in the present embodiment, control regarding the addition or modification of the secondary node is executed.
- control unit 140 can determine whether or not to execute conditional PSCell addition / change (CPA / CPC) based on the measurement report (Measurement Report) from the UE 200.
- control unit 140 may send an SN Addition Request to the target secondary node (T-SN). Further, the control unit 140 may receive the SN Addition Request Ack, which is a response to the SN Addition Request, from the T-SN.
- T-SN target secondary node
- control unit 140 receives not only the CPA / CPC but also the SN change required from the S-SN when the source / secondary node (S-SN) determines the SN-initiated conditional inter-SN PSCell change (CPC). You may. Further, the control unit 140 may send an SN Addition Request to the T-SN in response to the SN change required.
- S-SN source / secondary node
- CPC SN-initiated conditional inter-SN PSCell change
- the channel includes a control channel and a data channel.
- 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), Channel State Information-Reference Signal (CSI-RS), and the like. Includes channels and reference signals. 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
- FIG. 3 is a functional block configuration diagram of the UE 200.
- the UE 200 includes a wireless communication unit 210, an RRC processing unit 220, a DC processing unit 230, and a control unit 240.
- the wireless communication unit 210 transmits an uplink signal (UL signal) according to LTE or NR. Further, the wireless communication unit 210 receives the uplink signal (UL signal) according to LTE. That is, the UE200 can access the eNB100A (E-UTRAN20) and gNB100B (NGRAN30), and can support dual connectivity (specifically, EN-DC).
- UL signal uplink signal
- UE200 can access the eNB100A (E-UTRAN20) and gNB100B (NGRAN30), and can support dual connectivity (specifically, EN-DC).
- the RRC processing unit 220 executes various processes in the radio resource control layer (RRC). Specifically, the RRC processing unit 220 can send and receive messages of the radio resource control layer. In the present embodiment, the RRC processing unit 220 constitutes a transmission / reception unit.
- RRC radio resource control layer
- the RRC processing unit 220 can receive the RRC Reconfiguration from the network, specifically, the E-UTRAN20 (or NGRAN30). Further, the RRC processing unit 220 can transmit the RRC Reconfiguration Complete, which is a response to the RRC Reconfiguration, to the network.
- the RRC processing unit 220 may transmit dual connectivity information including a reset message of the radio resource control layer to the network in the procedure for adding or changing the secondary cell (conditional PSCell addition / change).
- the RRC processing unit 220 may send a ULInformationTransfer MRDC message including RRC Reconfiguration Complete to the network.
- RRC Reconfiguration Complete may be RRC Connection Reconfiguration Complete.
- normal UL information transfer may be used instead of UL Information Transfer MRDC.
- the RRC processing unit 220 may send another message of the radio resource control layer including the reset message of the radio resource control layer to the network in the conditional PSCell addition / change.
- the RRC processing unit 220 may send a new RRC message (bye-message) to the RRC layer including the RRC Reconfiguration Complete, or diverts the existing message of the RRC layer and includes the RRC Reconfiguration Complete. (That is, it may be embed).
- the RRC processing unit 220 may receive a message of the radio resource control layer including the identification information of the SCell (which may include the PSCell) or the radio base station (gNB) that forms the SCell.
- the RRC processing unit 220 may receive the RRC Reconfiguration including the CGI (or gNB ID) of the Target PS Cell as the identification information.
- the RRC processing unit 220 may transmit dual connectivity information including the CGI (or gNB ID), specifically, a ULInformationTransfer MRDC message, to the network according to the received RRC Reconfiguration.
- the RRC processing unit 220 transmits another message of the RRC layer including the CGI (or gNB ID), specifically, the above-mentioned new RRC message (bye-message) to the network according to the received RRC Reconfiguration. You may.
- the DC processing unit 230 executes processing related to dual connectivity, specifically, MR-DC. As described above, in the present embodiment, the DC processing unit 230 may execute the processing related to EN-DC, but may correspond to NE-DC and / or NR-DC.
- the DC processing unit 230 accesses each of the eNB 100A and gNB 100B, and has a plurality of layers including RRC (medium access control layer (MAC), radio link control layer (RLC), and packet data convergence protocol layer (. PDCP) etc.) can be executed.
- RRC medium access control layer
- RLC radio link control layer
- PDCP packet data convergence protocol layer
- the control unit 240 controls each functional block constituting the UE 200.
- the control unit 240 executes the transmission / reception of the RRC message by the RRC processing unit 220 and the control regarding DC by the DC processing unit 230.
- control unit 240 encodes the cell ID (NR PCI, NR CGI or gNB ID) of the Target PS Cell that satisfies the conditions for addition or change in the RRC layer of LTE, and together with RRC Reconfiguration Complete, the above-mentioned ULInformationTransfer MRDC.
- a message or a new RRC message (bye-message) may be sent to the network.
- the encoding of the cell ID of the Target PSCell may be interpreted as the processing required to include it in the ULInformationTransferMRDC message or a new RRC message, and the dual connectivity information (ULInformationTransferMRDC) or RRC including the cell ID (identification information). It may be interpreted as a message.
- FIG. 4 shows a communication sequence example (late data forwarding) according to the conventional conditional PSCell addition procedure.
- the MN determines whether or not CPA is possible (necessity) based on the Measurement Report from UE200 (step 2).
- UE200 monitors the execution condition, and if there is a targetPSCell that satisfies the execution condition, the UE200 applies the RRC reset of the targetPSCell (apply). Then, since it is necessary to send the RRC reconfiguration completion message to the SN via the MN, the RRC Reconfiguration Complete is returned to the MN (steps 7 and 8).
- the MN when the MN (eNB) receives the RRC Reconfiguration Complete from the UE 200, the MN sends SgNB Reconfiguration Complete (may be called SN Reconfiguration Complete) to any target secondary node (T-SN).
- SgNB Reconfiguration Complete may be called SN Reconfiguration Complete
- T-SN target secondary node
- FIG. 5 shows an example of a communication sequence (early data forwarding) according to a conventional conditional PSCell addition procedure (conditional PSCell addition).
- FIG. 6 shows an example of a communication sequence (late data) according to the SN-initiated conditional inter-SN PSCell change procedure (SN-initiated conditional inter-SN PSCell change). forwarding)) is shown.
- CPC conditional PSCell change
- FIG. 7 shows an example of a part of the communication sequence using the UL Information Transfer MRDC according to the operation example 1.
- FIG. 7 corresponds to a communication sequence example (late data forwarding) according to the conditional PSCell addition shown in FIG.
- the UE 200 may embed the RRC message of NR, specifically, RRC Reconfiguration Complete, in the UL Information Transfer MRDC of LTE.
- the UE 200 may include the cell ID (CGI, etc.) of the Target PSCell (T-SN) or the identification information (gNB ID) of the gNB constituting the T-SN in the UL Information Transfer MRDC.
- CGI Cell ID
- gNB ID identification information
- the UE200 encodes the cell ID (NRPCI, NRCGI or gNBID) of the TargetPSCell in the RRC layer of LTE, and sends the ULInformationTransfer MRDC message including the RRC Reconfiguration Complete and the cell ID (or gNBID). You can do it.
- FIG. 7 shows an example of late data forwarding
- the transmission of the UL Information Transfer MRDC message including such RRC Reconfiguration Complete is early as shown in FIG. It may also apply to data forwarding.
- FIG. 8 shows an example of a part of the communication sequence using the new RRC message according to the operation example 2.
- FIG. 8 also corresponds to a communication sequence example (late data forwarding) according to the conditional PSCell addition shown in FIG.
- the UE 200 may embed (embed) the NR RRC Reconfiguration Complete in a new LTE RRC message (which may be called Conditional Reconfiguration).
- the UE 200 may include the identification information (gNB ID) of the gNB constituting the Target PS Cell (T-SN) in the Conditional Reconfiguration.
- the Conditional Reconfiguration may include a combination (pair) of a plurality of RRC Reconfigurations and gNB IDs.
- the cell ID of T-SN may be included instead of the gNB ID.
- FIG. 8 also shows an example of late data forwarding
- the transmission of Conditional Reconfiguration including such Conditional Reconfiguration may be applied to early data forwarding shown in FIG.
- the MN includes the cell ID (CGI, etc.) of the Target PS Cell for each condReconfigId in the Conditional Reconfiguration included in the RRC Reconfiguration. You may do so.
- the RRC layer may be set based on the RRC Reconfiguration including such a cell ID.
- UE200 needs to apply the RRC resetting of the targetPSCell and send the RRC resetting completion message to the SN via MN, so the TargetPSCell that meets the conditions for addition or change
- the cell ID (NR PCI, NR CGI or gNB ID) may be encoded in the LTE RRC layer, and the ULInformation Transfer MRDC message or new RRC message (bye-message) described above may be sent to the MN together with the RRC Reconfiguration Complete.
- the MN (eNB100A) is a T-SN based on the cell ID (or gNB ID) of the Target PS Cell contained in the UL Information Transfer MRDC message or new RRC message (bye-message) sent from the UE 200 and the frequency band in the NR. May be specified and SgNB Reconfiguration Complete may be sent to the specified T-SN.
- the MN may specify the T-SN based on the PCI of the Target PSCell transmitted from the UE 200 and the frequency band in the NR (which may be interpreted as the frequency band (band) assigned to the NR). good.
- FIG. 9 shows a configuration example of CondReconfigToAddModList.
- IECondReconfigToAddModList is specified in 3GPP TS38.331 Chapter 6.3.2.
- IECondReconfigToAddModList is related to the list of conditional resets to be added or changed, and as shown in FIG. 9, condExecutionCond and condRRCReconfig related to condReconfigId are used for each entry.
- CondReconfigToAddModList may be interpreted as a setting list of candidate SpecialCell (SpCell) to be added or changed for conditional handover (CHO) or CPC.
- SpCell SpecialCell
- the field of targetSecondaryNodeId which is the identification information of T-SN may be included.
- FIG. 10 shows a configuration example of NRULInformationTransferMRDCmessage.
- the NRULInformationTransferMRDC message is specified in 3GPP TS38.331 Chapter 6.2.2.
- the NRULInformationTransferMRDCmessage may include ULInformationTransferMRDC-r17-IEs as an information element.
- the IE may be supported by Release-17 of 3GPP, but may be supported by other Releases.
- ULInformationTransferMRDC-r17-IEs may include targetSecondaryNodeId and targetPSCellId fields (see underlined part).
- targetPSCellId is the identification information (CGI, etc.) of TargetPSCell.
- FIG. 11 shows a configuration example of LTE ULInformation Transfer MRDC message.
- the LTE ULInformationTransfer MRDC message is specified in 3GPP TS36.331 Chapter 6.2.2.
- the configuration of the LTE ULInformationTransferMRDC message is substantially the same as the configuration of the NRULInformationTransferMRDCmessage shown in FIG. 10, and ULInformationTransferMRDC-r17-IEs may be included.
- ULInformationTransferMRDC-r17-IEs may include fields for targetSecondaryNodeId and targetPSCellId (see underlined parts).
- the UE200 can send a ULInformationTransferMRDC message (dual connectivity information) including RRC Reconfiguration Complete in the conditional PSCell addition / change procedure to the network.
- a ULInformationTransferMRDC message (dual connectivity information) including RRC Reconfiguration Complete in the conditional PSCell addition / change procedure
- the UE200 can send another message of the RRC layer including RRC Reconfiguration Complete, for example, a new RRC message (bye-message) to the network in the procedure of conditionalPSCell addition / change.
- RRC Reconfiguration Complete for example, a new RRC message (bye-message)
- UE200 can add or change PSCell by RRC message that MN (eNB) can recognize.
- the UE 200 performs an RRC Reconfiguration (message of a radio resource control layer) including identification information (CGI or gNB ID) of an SCell (which may include a PSCell) or a radio base station (gNB) forming the SCell. It can receive and send a ULInformationTransferMRDC message containing the CGI (or gNBID) to the network. Alternatively, the UE 200 can send another message of the RRC layer including the CGI (or gNBID), specifically, the above-mentioned new RRC message (bye-message) to the network.
- RRC Reconfiguration messages of a radio resource control layer
- identification information CGI or gNB ID
- SCell which may include a PSCell
- gNB radio base station
- the UE 200 can send another message of the RRC layer including the CGI (or gNBID), specifically, the above-mentioned new RRC message (bye-message) to the network.
- the MN eNB100A
- T-SN Target PSCell
- EN-DC in which MN is eNB and SN is gNB has been described as an example, but as described above, it may be another DC.
- MN may be gNB and SN may be gNB, or MN may be gNB and SN may be NE-DC.
- UE200 applies RRC Reconfiguration and meets the conditions for addition or change of Target PS Cell cell ID (NR PCI, NR CGI).
- NR PCI Target PS Cell cell ID
- gNBID may be encoded in the RRC layer of NR, incorporated into the above-mentioned ULInformationTransferMRDC message or new RRC message (bye-message) together with RRCReconfigurationComplete, and transmitted to MN.
- UE200 applies RRCConnectionReconfiguration and the cell ID (NRPCI, NR) of TargetPSCell that meets the conditions for addition or change.
- CGI or gNBID may be encoded in the RRC layer of NR, incorporated into the ULInformationTransfer MRDC message or new RRC message (bye-message) described above together with RRCConnectionReconfigurationComplete, and transmitted to MN.
- conditional PSCell addition / change has been mainly described as an example, but as described above, the conditional PSCell change procedure (MN-initiated conditional inter-SN PSCell change / SN-initiated conditional inter). -The same operation may be applied to SNPSCellchange).
- each functional block is realized by any combination of at least one of hardware and software.
- the method of realizing each functional block is not particularly limited. That is, 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. 12 is a diagram showing an example of the hardware configuration of the device.
- 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 FIG. 2.3) 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), an ApplicationSpecific Integrated Circuit (ASIC), a ProgrammableLogicDevice (PLD), and a 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 LongTermEvolution
- LTE-A LTE-Advanced
- SUPER3G IMT-Advanced
- 4G 4th generation mobile communication system
- 5G 5th generation mobile communication system
- FutureRadioAccess FAA
- NewRadio NR
- W-CDMA registered trademark
- GSM registered trademark
- CDMA2000 Code Division Multiple Access 2000
- UMB UltraMobile Broadband
- IEEE802.11 Wi-Fi (registered trademark)
- IEEE802.16 WiMAX®
- IEEE802.20 Ultra-WideBand (UWB), Bluetooth®, and other systems that utilize appropriate systems and at least one of the 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 1 bit (0 or 1), by a boolean 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 base station coverage area 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.
- words such as "up” and “down” may be read as words corresponding to 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 called a subframe.
- Subframes may further be composed of one or more slots in the time domain.
- the subframe may have a fixed time length (for example, 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 neumerology, 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. Can be considered to be “connected” or “coupled” to each other using electromagnetic energy having wavelengths in the microwave and light (both visible and invisible) regions.
- 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”.
- Wireless communication system 20 E-UTRAN 30 NG RAN 100A eNB 100B gNB 110 Wireless communication unit 120 RRC processing unit 130 DC processing unit 140 Control unit 200 UE 210 Wireless communication unit 220 RRC processing unit 230 DC processing unit 240 Control unit 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、Long Term Evolution(LTE)及び5G New Radio(NR)に従った無線通信システムである。なお、LTEは4Gと呼ばれてもよいし、NRは、5Gと呼ばれてもよい。また、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、eNB100A及びUE200の機能ブロック構成について説明する。
図2は、eNB100Aの機能ブロック構成図である。図2に示すように、eNB100Aは、無線通信部110、RRC処理部120、DC処理部130及び制御部140を備える。
図3は、UE200の機能ブロック構成図である。図3に示すように、UE200は、無線通信部210、RRC処理部220、DC処理部230及び制御部240を備える。
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、条件付きセカンダリーセル(セカンダリーノード)の追加・変更手順(conditional PSCell addition/change)、及び条件付きSN間PSCell変更手順(MN-initiated conditional inter-SN PSCell change/SN-initiated conditional inter-SN PSCell change)に関する無線通信システム10の動作について説明する。
図4は、従来の条件付きPSCell追加手順(conditional PSCell addition)に従った通信シーケンス例(後データフォワーディング(late data forwarding))を示す。
forwarding))を示す。
以下では、上述したNRのRRC Reconfiguration Completeを送信できない問題を解決し得る幾つかの動作例について説明する。
図7は、動作例1に係るULInformationTransferMRDCを用いた通信シーケンスの一部の例を示す。図7は、図4に示したconditional PSCell additionに従った通信シーケンス例(late data forwarding)と対応する。
data forwardingにも適用されてよい。
図8は、動作例2に係る新規RRCメッセージを用いた通信シーケンスの一部の例を示す。図8も、図4に示したconditional PSCell additionに従った通信シーケンス例(latedata forwarding)と対応する。
次に、上述した動作例1(図7)及び動作例2(図8)のステップ5において、MNは、RRC Reconfigurationに含まれるConditionalReconfigurationにおいて、condReconfigId毎にTarget PSCellのセルID(CGIなど)を含めるようにしてもよい。UE200は、このようなセルIDを含むRRC Reconfigurationに基づいて、RRCレイヤが設定されてよい。
次に、上述したRRCレイヤの情報要素(IE)及びRRCメッセージの構成例について説明する。
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、UE200は、conditional PSCell addition/changeの手順において、RRC Reconfiguration Complete(無線リソース制御レイヤの再設定メッセージ)を含むULInformationTransferMRDC message(デュアルコネクティビティの情報)をネットワークに送信できる。
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 E-UTRAN
30 NG RAN
100A eNB
100B gNB
110 無線通信部
120 RRC処理部
130 DC処理部
140 制御部
200 UE
210 無線通信部
220 RRC処理部
230 DC処理部
240 制御部
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)
- 無線リソース制御レイヤのメッセージを送受信する送受信部を備え、
前記送受信部は、セカンダリーセルの追加または変更手順において、前記無線リソース制御レイヤの再設定メッセージを含むデュアルコネクティビティの情報をネットワークに送信する端末。 - 無線リソース制御レイヤのメッセージを送受信する送受信部を備え、
前記送受信部は、セカンダリーセルの追加または変更手順において、前記無線リソース制御レイヤの再設定メッセージを含む前記無線リソース制御レイヤの別メッセージをネットワークに送信する端末。 - 前記送受信部は、
前記セカンダリーセルまたは前記セカンダリーセルを形成する無線基地局の識別情報を含む前記無線リソース制御レイヤのメッセージを受信し、
前記識別情報を含む前記デュアルコネクティビティの情報を送信する請求項1に記載の端末。 - 前記送受信部は、
前記セカンダリーセルまたは前記セカンダリーセルを形成する無線基地局の識別情報を含む前記無線リソース制御レイヤのメッセージを受信し、
前記識別情報を含む前記無線リソース制御レイヤの別メッセージを送信する請求項2に記載の端末。 - 端末及び無線基地局を含む無線通信システムであって、
前記端末は、無線リソース制御レイヤのメッセージを送受信する送受信部を備え、
前記送受信部は、セカンダリーセルの追加または変更手順において、前記無線リソース制御レイヤの再設定メッセージを含むデュアルコネクティビティの情報を前記無線基地局に送信し、
前記無線基地局は、前記デュアルコネクティビティの情報を受信する受信部を備える無線通信システム。 - 端末及び無線基地局を含む無線通信システムであって、
前記端末は、無線リソース制御レイヤのメッセージを送受信する送受信部を備え、
前記送受信部は、セカンダリーセルの追加または変更手順において、前記無線リソース制御レイヤの再設定メッセージを含む前記無線リソース制御レイヤの別メッセージを前記無線基地局に送信し、
前記無線基地局は、前記別メッセージを受信する受信部を備える無線通信システム。
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| HUAWEI, HISILICON: "Discussion on Conditional PSCell addition/change", 3GPP DRAFT; R2-2007679, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), 7 August 2020 (2020-08-07), XP051912308 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2022039189A1 (ja) | 2022-02-24 |
| US20240031884A1 (en) | 2024-01-25 |
| JP7743414B2 (ja) | 2025-09-24 |
| CN115956392A (zh) | 2023-04-11 |
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