WO2022190286A1 - Terminal et procédé de communication sans fil - Google Patents

Terminal et procédé de communication sans fil Download PDF

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Publication number
WO2022190286A1
WO2022190286A1 PCT/JP2021/009616 JP2021009616W WO2022190286A1 WO 2022190286 A1 WO2022190286 A1 WO 2022190286A1 JP 2021009616 W JP2021009616 W JP 2021009616W WO 2022190286 A1 WO2022190286 A1 WO 2022190286A1
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Prior art keywords
secondary cell
cell group
scg
radio
terminal
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PCT/JP2021/009616
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English (en)
Japanese (ja)
Inventor
天楊 閔
明人 花木
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株式会社Ｎｔｔドコモ
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Priority to PCT/JP2021/009616 priority Critical patent/WO2022190286A1/fr
Priority to CN202180095327.XA priority patent/CN117063603A/zh
Publication of WO2022190286A1 publication Critical patent/WO2022190286A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H04W76/38—Connection release triggered by timers

Definitions

  • the present disclosure relates to a terminal and wireless communication method compatible with dual connectivity.
  • 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
  • Non-Patent Document 1 In Release-17 of 3GPP, expansion of Multi-RAT Dual Connectivity (MR-DC) is being considered. activation/deactivation mechanism (which may be referred to as SCG activation/deactivation) has been studied (Non-Patent Document 1).
  • the UE deactivates the SCG autonomously when an SCG failure occurs.
  • the SCG failure procedure eg, 3GPP TS38.331 Section 5.7.3.2
  • the following disclosure is made in view of such a situation, and aims to provide a terminal and a wireless communication method that can appropriately perform autonomous deactivation of SCG in the event of an SCG failure. do.
  • One aspect of the present disclosure is a transmission/reception unit (radio communication unit 210) that transmits and receives radio signals via a secondary cell group, and a control unit that deactivates the secondary cell group according to the state of the secondary cell group ( a controller 240), which deactivates the secondary cell group when a timer for radio resource reconfiguration expires or a problem occurs in the initial access procedure in the secondary cell group.
  • a transmission/reception unit radio communication unit 210) that transmits and receives radio signals via a secondary cell group
  • a control unit that deactivates the secondary cell group according to the state of the secondary cell group ( a controller 240), which deactivates the secondary cell group when a timer for radio resource reconfiguration expires or a problem occurs in the initial access procedure in the secondary cell group.
  • a terminal UE 200).
  • One aspect of the present disclosure is a transmission/reception unit (radio communication unit 210) that transmits and receives radio signals via a secondary cell group;
  • a control unit (control unit 240) that deactivates the secondary cell group according to the state of the secondary cell group, and the control unit deactivates the secondary cell group when the medium access control layer A terminal (UE 200) that maintains settings.
  • One aspect of the present disclosure includes a step of a terminal transmitting and receiving radio signals via a secondary cell group, and a step of the terminal deactivating the secondary cell group according to a state of the secondary cell group. and, in the deactivating step, the secondary cell group is deactivated when a timer related to radio resource reconfiguration expires or when a problem occurs in an initial access procedure in the secondary cell group. is.
  • One aspect of the present disclosure includes a step of a terminal transmitting and receiving radio signals via a secondary cell group, and a step of the terminal deactivating the secondary cell group according to the state of the secondary cell group. wherein the deactivating step maintains settings of a medium access control layer when deactivating the secondary cell group.
  • FIG. 1 is an overall schematic configuration diagram of a radio communication system 10.
  • FIG. 2 is a functional block configuration diagram of the eNB100A.
  • FIG. 3 is a functional block configuration diagram of UE200.
  • FIG. 4 is a diagram illustrating an example of a communication sequence for SCG deactivation and reactivation.
  • FIG. 5 is a diagram showing an operation example of the UE 200 when an SCG failure occurs according to the 3GPP Release-15, 16 regulations.
  • FIG. 6 is a diagram showing an operation example when the UE 200 according to Operation Example 2 autonomously deactivates the SCG.
  • FIG. 7 is a diagram showing an operation example in which the UE 200 according to Operation Example 2 restarts the SCG that has been autonomously deactivated.
  • FIG. 8 is a diagram showing an example of the hardware configuration of eNB100A, gNB100B 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 Long Term Evolution (LTE) and 5G New Radio (NR). Note that LTE may be called 4G, and NR may be called 5G. Also, the radio communication system 10 may be a radio communication system conforming to a scheme called Beyond 5G, 5G Evolution, or 6G.
  • LTE Long Term Evolution
  • NR 5G New Radio
  • 6G 6G
  • LTE and NR may be interpreted as radio access technology (RAT), and in this embodiment, LTE may be referred to as the first radio access technology and NR may be referred to as the second radio access technology.
  • RAT radio access technology
  • the wireless communication system 10 includes an Evolved Universal Terrestrial Radio Access Network 20 (hereinafter E-UTRAN 20) and a Next Generation-Radio Access Network 30 (hereinafter NG RAN 30).
  • E-UTRAN 20 Evolved Universal Terrestrial Radio Access Network 20
  • NG RAN 30 Next Generation-Radio Access Network 30
  • the wireless communication system 10 also includes a terminal 200 (hereafter UE 200, User Equipment).
  • E-UTRAN20 includes eNB100A, which is a radio base station conforming to LTE.
  • NG RAN30 includes gNB100B, a radio base station according to 5G (NR).
  • NG RAN 30 is connected to User Plane Function 40 (hereafter, UPF 40) that is included in the 5G system architecture and provides user plane functions.
  • UPF 40 User Plane Function 40
  • E-UTRAN 20 and NG RAN 30 (which may be eNB100A or gNB100B) may simply be referred to as networks.
  • the eNB100A, gNB100B, and UE200 can support carrier aggregation (CA) using multiple component carriers (CC), and dual connectivity that simultaneously transmits component carriers between multiple NG-RAN Nodes and UEs. .
  • CA carrier aggregation
  • CC component carriers
  • dual connectivity that simultaneously transmits component carriers between multiple NG-RAN Nodes and UEs.
  • eNB100A, gNB100B and UE200 perform radio communication via radio bearers, specifically Signaling Radio Bearer (SRB) or DRB Data Radio Bearer (DRB).
  • SRB Signaling Radio Bearer
  • DRB DRB Data Radio Bearer
  • eNB100A configures the master node (MN) and gNB100B configures the secondary node (SN) Multi-Radio Dual Connectivity (MR-DC), specifically E-UTRA-NR Dual Connectivity ( EN-DC) or NR-E-UTRA Dual Connectivity (NE-DC) in which the gNB 100B configures the MN and the eNB 100A configures the SN.
  • MR-DC Multi-Radio Dual Connectivity
  • EN-DC E-UTRA-NR Dual Connectivity
  • NE-DC NR-E-UTRA Dual Connectivity
  • NR-DC may be implemented in which the gNB configures the MN and SN.
  • UE200 supports dual connectivity connecting to eNB100A and gNB100B.
  • eNB100A is included in the master cell group (MCG) and gNB100B is included in the secondary cell group (SCG).
  • MCG master cell group
  • SCG secondary cell group
  • gNB100B is an SN included in the SCG.
  • the eNB100A and gNB100B may be called radio base stations or network devices.
  • the wireless communication system 10 may support addition or change (PSCell addition/change) of Primary SCell (PSCell).
  • PSCell addition/change may include conditional PSCell addition/change.
  • a PSCell is a type of secondary cell.
  • PSCell means Primary SCell (secondary cell), and may be interpreted as corresponding to any SCell among a plurality of SCells.
  • a secondary cell may be read as a secondary node (SN) or a secondary cell group (SCG).
  • SN secondary node
  • SCG secondary cell group
  • the radio communication system 10 may support a conditional inter-SN PSCell change procedure. Specifically, MN-initiated MN-initiated conditional inter-SN PSCell change and/or SN-initiated SN-initiated conditional inter-SN PSCell change may be supported.
  • FIG. 2 is a functional block configuration diagram of the eNB100A.
  • the eNB 100A includes a radio communication section 110, an RRC processing section 120, a DC processing section 130 and a control section 140.
  • the gNB100B may also have the same functions as the eNB100A, although the gNB100B is different in that it supports NR.
  • the radio communication unit 110 transmits downlink signals (DL signals) according to LTE.
  • Radio communication section 110 also receives an uplink signal (UL signal) according to LTE.
  • the radio communication unit 110 performs PDU/SDU assembly/ Perform disassembly, etc.
  • the RRC processing unit 120 executes various processes in the radio resource control layer (RRC). Specifically, RRC processing section 120 can transmit RRC Reconfiguration to UE 200 . Also, RRC processing section 120 can receive RRC Reconfiguration Complete, which is a response to RRC Reconfiguration, from UE 200 .
  • RRC radio resource control layer
  • the eNB 100A supports LTE, but in this case, the name of the RRC message may be RRC Connection Reconfiguration or RRC Connection Reconfiguration Complete.
  • RRC Reconfiguration (and RRC messages between MN and SN (inter-node RRC messages) may include reconfigurationWithSync regarding cell reconfiguration.
  • reconfigurationWithSync is described in 3GPP TS38.331 5.3.5.5.2, etc. stipulated.
  • reconfigurationWithSync may be interpreted as a common mechanism for activating cells (NR cells) (that is, adding NR cells) in non-standalone (NSA) including other RATs (such as LTE).
  • UE 200 can execute a random access procedure (RA procedure) or the like based on reconfigurationWithSync.
  • DC processing section 130 executes processing related to dual connectivity, specifically Multi-RAT Dual Connectivity (MR-DC).
  • MR-DC Multi-RAT Dual Connectivity
  • the eNB 100A supports LTE and the gNB 100B supports NR, so DC processing section 130 may perform processing related to E-UTRA-NR Dual Connectivity (EN-DC).
  • EN-DC E-UTRA-NR Dual Connectivity
  • the type of DC is not limited as described above, and may correspond to, for example, NR-E-UTRA Dual Connectivity (NE-DC) or NR-NR Dual Connectivity (NR-DC).
  • the DC processing unit 130 can transmit and receive messages defined in 3GPP TS37.340, etc., and execute processing related to DC setup and release between the eNB100A, gNB100B, and UE200.
  • the control unit 140 controls each functional block that configures the eNB 100A.
  • the control unit 140 performs control regarding addition or change of secondary cells (or secondary nodes).
  • control unit 140 can perform control related to activation/de-activation of the secondary cell group (SCG). Specifically, the control unit 140 may activate (may be called activation) or deactivate (may be called inactivation) the SCG. More specifically, the control unit 140 may activate or deactivate one or more SCells (which may include PSCells; hereinafter the same) included in the SCG.
  • SCG secondary cell group
  • SCells which may include PSCells; hereinafter the same
  • An active SCG may be interpreted as a state in which the UE 200 can immediately use the SCG (SCell).
  • An inactive SCG (SCell) may be interpreted as a state in which the UE 200 cannot immediately use the SCG (SCell), but configuration information is retained.
  • channels include control channels and data channels.
  • Control channels include PDCCH (Physical Downlink Control Channel), PUCCH (Physical Uplink Control Channel), PRACH (Physical Random Access Channel), and PBCH (Physical Broadcast Channel).
  • data channels include PDSCH (Physical Downlink Shared Channel) and PUSCH (Physical Uplink Shared Channel).
  • PDSCH Physical Downlink Shared Channel
  • PUSCH Physical Uplink Shared Channel
  • Reference signals include demodulation reference signal (DMRS), sounding reference signal (SRS), phase tracking reference signal (PTRS), and channel state information-reference signal (CSI-RS). Channels and reference signals are included. Data may also refer to data transmitted over 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 UE200. As shown in FIG. 3 , UE 200 includes radio communication section 210 , RRC processing section 220 , DC processing section 230 and control section 240 .
  • the radio communication unit 210 transmits an uplink signal (UL signal) according to LTE or NR. Also, radio communication section 210 receives a downlink signal (DL signal) according to LTE or NR.
  • UL signal uplink signal
  • DL signal downlink signal
  • UE200 can access eNB100A (E-UTRAN20) and gNB100B (NG RAN30), and can support dual connectivity (specifically, EN-DC). In this way, UE 200 can transmit and receive radio signals via MCG or SCG, specifically via cells included in MCG or cells included in SCG (SCell including PSCell).
  • the wireless communication unit 210 may constitute a transmission/reception unit.
  • the radio communication unit 210 performs assembly/disassembly of PDU/SDU in MAC, RLC, PDCP, etc., like the radio communication unit 110 of the eNB100A (gNB100B).
  • the RRC processing unit 220 executes various processes in the radio resource control layer (RRC). Specifically, the RRC processing unit 220 can transmit and receive radio resource control layer messages.
  • RRC radio resource control layer
  • the RRC processing unit 220 can receive RRC Reconfiguration from the network, specifically from the E-UTRAN 20 (or NG RAN 30). Also, the RRC processing unit 220 can transmit RRC Reconfiguration Complete, which is a response to RRC Reconfiguration, to the network.
  • the DC processing unit 230 executes processing related to dual connectivity, specifically MR-DC. As described above, in this embodiment, the DC processing unit 230 may perform processing related to EN-DC, but may also support NE-DC and/or NR-DC.
  • DC processing unit 230 accesses each of eNB100A and gNB100B, and multiple layers including RRC (medium access control layer (MAC), radio link control layer (RLC), and packet data convergence protocol layer (PDCP), etc.) can be performed.
  • RRC medium access control layer
  • RLC radio link control layer
  • PDCP packet data convergence protocol layer
  • the DC processing unit 230 can send a report regarding SCG deactivation.
  • a report on deactivation may be interpreted in a broad sense, and may include settings related to SCG activation or deactivation, explicit or implicit display of active or de-active state, transition to that state, and the like. .
  • the DC processing unit 230 can also transmit SCG failure information to the network. Specifically, the DC processing unit 230 may transmit an SCG failure information message (or a new RRC message) via the RRC processing unit 220.
  • the control unit 240 controls each functional block that configures the UE200.
  • the control unit 240 can perform control regarding activation/de-activation of secondary cell groups (SCGs).
  • SCGs secondary cell groups
  • control unit 240 deactivates the SCG according to the state of the SCG. More specifically, the control unit 240 may deactivate the SCG when a timer related to radio resource resetting expires in the SCG.
  • a timer for radio resource reconfiguration may be interpreted as a timer for RRC reconfiguration.
  • the timer may be T304, T310 or T312 specified in 3GPP TS38.331. Controller 240 may deactivate the SCG when these timers expire in the SCG.
  • Timer T304 is started when an RRCReconfiguration message with reconfigurationWithSync is received or when a conditional reconfiguration is performed, i.e. when applying a stored RRCReconfiguration message with May be stopped upon completion.
  • Timer T310 is started when a Special Cell (SpCell) physical layer problem is detected, i.e. when consecutive out-of-sync indications of N310 are received from the lower layers, and consecutive synchronous indications of N311 are received from the lower layers of the SpCell. is received, when RRCReconfiguration is received in reconfigurationWithSync of the cell group, when MobilityFromNRCommand is received, when rlf-TimersAndConstant is reconfigured, when the connection re-establishment procedure is started, when the MCG failure information procedure is started, and May be stopped upon SCG release.
  • SpCell Special Cell
  • T312 is started when T312 is configured and triggers a measurement report for a measurement ID with "useT312" set to true during T310 execution of a PCell, if T312 is configured in MCG, If T312 is configured in the SCG and "useT312" is set to true, it may be initiated when T312 triggers a measurement report for the configured measurement ID during T310 execution of the PSCell.
  • T312 receives N311 continuous synchronization indication from the lower layer of SpCell, receives RRCReconfiguration in reconfigurationWithSync of the cell group, starts the connection re-establishment procedure, reconfigures rlf-TimersAndConstant, MCG It may be stopped when starting the failure information procedure and when the T310 expires on the corresponding SpCell.
  • control unit 240 may deactivate the SCG when a problem occurs in the initial access procedure.
  • An initial access procedure may be interpreted as a procedure performed by an idle UE 200 to connect to a cell included in the SCG, and may be a random access (RA) procedure.
  • RA random access
  • control unit 240 may deactivate the SCG when a random access problem indication of the RA procedure (which may be RACH transmission) is provided from the MAC layer of the SCG.
  • a random access problem indication of the RA procedure (which may be RACH transmission) is provided from the MAC layer of the SCG.
  • the SCG inactive state (dedicated state) may be at least one of the following states.
  • ⁇ PDCCH is not monitored in PSCell of deactivated SCG.
  • ⁇ UE200 maintains the DL synchronization state.
  • the UE 200 performs restricted RRM measurement.
  • the UE 200 performs limited radio link monitoring (RLM) and/or does not perform beam management (beam failure detection and restoration), SRS (Sounding Reference Signal) transmission, CSI reporting.
  • RLM radio link monitoring
  • SRS Sounding Reference Signal
  • control unit 240 may deactivate the SCG when the number of retransmissions related to radio link control reaches the maximum number in the SCG. Specifically, the control unit 240 may deactivate the SCG if an indication is provided from the RLC layer of the SCG that the maximum number of retransmissions has been reached.
  • the control unit 240 may maintain the MAC layer settings when deactivating the SCG. Specifically, when deactivating the SCG, the control unit 240 may follow the operation in the event of an SCG failure, but may skip resetting the MAC of the SCG.
  • control unit 240 may follow the SCG failure information initiation procedure specified in 3GPP TS38.331 Section 5.7.3.2. You may skip the action and keep the SCG MAC setting.
  • control unit 240 may restart at least one of radio bearers in the SCG and channels related to radio link control.
  • control unit 240 since the control unit 240 maintains the SCG MAC settings, SCG transmission via Signaling Radio Bearer (SRB) and Data Radio Bearer (DRB) may be resumed. Also, if a Backhaul (BH) RLC channel exists, control section 240 may restart the RLC channel.
  • SRB Signaling Radio Bearer
  • DRB Data Radio Bearer
  • a BH RLC channel may be interpreted as an RLC channel configured by logical channels of RLC and IAB (Integrated Access and Backhaul) nodes.
  • FIG. 4 shows an example of a communication sequence for SCG deactivation and reactivation.
  • UE 200 configures Autonomous SCG deactivation to deactivate SCG autonomously (step 1). This allows the UE 200 to autonomously deactivate the SCG when an SCG failure (for example, SCG radio link failure (RLF)) occurs.
  • SCG failure for example, SCG radio link failure (RLF)
  • SCG may use a higher frequency band (for example, 24.25 GHz to 52.6 GHz (FR2) or 52.6 GHz or higher) compared to MCG. is high, and the propagation state of radio signals (radio waves) tends to be unstable.
  • FR2 52.6 GHz
  • SCell in which a high frequency band is used, it is easy to repeat failure and recovery, and if UE 200 cannot deactivate SCG autonomously, activation/deactivation of SCG with the network each time failure and recovery Requires communication regarding conversion.
  • the UE 200 reports the SCG failure information message to the network when the SCG failure determination condition is satisfied in the state where the autonomous SCG deactivation is set in this way (steps 2 and 3).
  • the SCG failure determination conditions may be based on the conditions specified in 3GPP TS38.331 Section 5.7.3.2 and Section 5.7.3.3 (details will be described later).
  • the UE 200 may transition the SCG to the deactivation state (step 4). Also, the network can detect SCG failure based on the received SCG failure information message (step 5).
  • the UE 200 may transmit a report (including the SCG failure information message) regarding the deactivation of the SCG (may be almost simultaneously), and may transition the SCG to the inactive state, or within a predetermined time after the transition may transition the SCG to the inactive state.
  • a report including the SCG failure information message
  • the UE 200 may transmit a report (including the SCG failure information message) regarding the deactivation of the SCG (may be almost simultaneously), and may transition the SCG to the inactive state, or within a predetermined time after the transition may transition the SCG to the inactive state.
  • the UE 200 detects recovery of the SCG (step 6). Specifically, the UE 200 can detect that the failure determination conditions satisfied in step 2 are not satisfied.
  • the UE 200 reactivates the SCG and transitions (returns) the SCG to the activation state (step 7).
  • the UE 200 may autonomously reactivate such an SCG.
  • SCG autonomous reactivation may be referred to as UE autonomous reactivation.
  • the UE 200 may autonomously deactivate the SCG when at least one of the following conditions is satisfied.
  • LBT Listen-Before-Talk
  • the UE 200 may maintain the MAC of the SCG when autonomously deactivating the SCG. Specifically, when deactivating the SCG, the UE 200 may retain the MAC layer settings of the SCG at that time.
  • Fig. 5 shows an operation example of UE 200 when an SCG failure occurs according to the 3GPP Release-15, 16 regulations.
  • the SCG MAC is reset (see the underlined part).
  • FIG. 6 shows an operation example when the UE 200 according to operation example 2 autonomously deactivates the SCG. Note that the conditions for the UE 200 to autonomously deactivate the SCG may follow Operation Example 1 described above.
  • the operation example of the UE 200 shown in FIG. 6 corresponds to the SCG failure information initiation procedure specified in 3GPP TS38.331 Section 5.7.3.2, but is added as a procedure for autonomously deactivating the SCG. may be
  • the UE 200 may operate as follows when autonomously deactivating the SCG.
  • the UE 200 may operate as described above. Note that the autonomous SCG deactivation by the UE 200 may be called UE triggered SCG deactivation.
  • the UE 200 may restart (may be called reactivation) an autonomously deactivated SCG.
  • FIG. 7 shows an operation example in which the UE 200 according to Operation Example 2 resumes the SCG that has been autonomously deactivated.
  • UE 200 when UE 200 receives an indication that the setting of the lower layer is active from the lower layer (physical layer, etc.) regarding SCG, the transmission of SCG via suspended SRB and DRB, and BH RLC Channels (if any) may be restarted.
  • the setting of the lower layer may be activated according to an instruction from the network, or may be activated based on the internal operation of the UE 200 instead of an instruction from the network.
  • the UE 200 may deactivate the SCG when a timer related to radio resource reconfiguration expires or when a problem occurs in the initial access procedure in the SCG. Also, the UE 200 may maintain the MAC layer setting when deactivating the SCG.
  • the UE 200 can appropriately perform autonomous SCG deactivation in the event of an SCG failure while responding to prompt SCG reactivation. Also, the MAC of the SCG is preserved, allowing quick reactivation.
  • the UE 200 may deactivate the SCG when the number of retransmissions related to radio link control (RLC) reaches the maximum number in the SCG. Therefore, the autonomous deactivation of the SCG considering the state of the RLC can be properly performed.
  • RLC radio link control
  • the UE 200 may restart at least one of the radio bearer in the SCG and the channel related to radio link control (BH RLC channel).
  • BH RLC channel radio link control
  • the EN-DC in which the MN is the eNB and the SN is the gNB was described as an example, but other DCs may be used as described above.
  • NR-DC in which MN is gNB and SN is gNB, or NE-DC in which MN is gNB and SN is eNB may be used.
  • SCG deactivation may be replaced with other terms with similar meanings, such as the above-described deactivation and hibernation.
  • 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. 8 is a diagram showing an example of the hardware configuration of the device.
  • the device may be configured as a computing 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 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 Fig. 2.3) 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 by a central processing unit (CPU) including interfaces with peripheral devices, a control unit, an arithmetic unit, 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 radio frame may consist of one or more frames in the time domain. Each frame or frames in the time domain may be referred to as a subframe. A subframe may also consist of one or more slots in the time domain. A subframe may be a fixed time length (eg, 1 ms) independent of 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 an RB may be the same regardless of neurology, 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 "judgement” 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 E-UTRAN 30NG RAN 40 UPF 100A eNB 100B gNB 110 Radio 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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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Ce terminal désactive un groupe de cellules secondaires en fonction de l'état du groupe de cellules secondaires. Le terminal désactive le groupe de cellules secondaires lorsqu'un temporisateur pour redéfinir des ressources sans fil a expiré ou qu'un problème s'est produit dans une procédure d'accès initial dans le groupe de cellules secondaires.
PCT/JP2021/009616 2021-03-10 2021-03-10 Terminal et procédé de communication sans fil WO2022190286A1 (fr)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018174038A1 (fr) * 2017-03-23 2018-09-27 株式会社Ｎｔｔドコモ Système de communication sans fil et station de base sans fil

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018174038A1 (fr) * 2017-03-23 2018-09-27 株式会社Ｎｔｔドコモ Système de communication sans fil et station de base sans fil

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