WO2023067750A1 - 端末、基地局、無線通信システム及び無線通信方法 - Google Patents
端末、基地局、無線通信システム及び無線通信方法 Download PDFInfo
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- WO2023067750A1 WO2023067750A1 PCT/JP2021/038894 JP2021038894W WO2023067750A1 WO 2023067750 A1 WO2023067750 A1 WO 2023067750A1 JP 2021038894 W JP2021038894 W JP 2021038894W WO 2023067750 A1 WO2023067750 A1 WO 2023067750A1
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- secondary cell
- information element
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/32—Hierarchical cell structures
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Definitions
- the present disclosure relates to a terminal that performs wireless communication, in particular, a terminal that activates a secondary cell group, a base station, a wireless communication system, and a wireless communication method.
- 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 a method of setting a secondary cell (SCell; Secondary Cell) by an RRC (Radio Resource Control) message and activating the SCell by a MAC CE (Medium Access Control Control Element) message is specified (for example, Non-Patent Document 1).
- SCell Secondary Cell
- RRC Radio Resource Control
- MAC CE Medium Access Control Control Element
- 3GPP TS38.321 V16.7.6 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Medium Access Control (MAC) protocol specification (Release 16), 3GPP, September 2021
- the inventors found that it is possible to reduce the signaling load for SCells other than specific SCells (Secondary Cells) in which a physical uplink control channel (PUCCH) is set. found gender.
- SCells other than specific SCells (Secondary Cells) in which a physical uplink control channel (PUCCH) is set. found gender.
- PUCCH physical uplink control channel
- an object of the present invention is to provide a terminal, a base station, a wireless communication system, and a wireless communication method that can reduce the signaling load in activating a secondary group.
- One aspect of the disclosure is a control unit that controls activation of a secondary cell group including a specific secondary cell in which a physical uplink control channel is set and a secondary cell other than the specific secondary cell, and a communication with the secondary cell group. wherein the control unit activates the secondary cell based on the information element regarding the secondary cell, and the information element regarding the secondary cell is activated when the secondary cell group is deactivated. or an information element included in a message requesting activation of the secondary cell group.
- One aspect of the disclosure is a control unit that controls activation of a secondary cell group including a specific secondary cell in which a physical uplink control channel is set and a secondary cell other than the specific secondary cell, and a communication unit that performs communication with a terminal. And, the control unit assumes that the terminal activates the secondary cell based on the information element regarding the secondary cell, and the information element regarding the secondary cell is the secondary cell group A base station, which is an information element stored when it is deactivated or an information element included in a message requesting activation of said secondary cell group.
- One aspect of the disclosure includes a terminal and a base station, and the terminal controls activation of a secondary cell group including a specific secondary cell in which a physical uplink control channel is configured and a secondary cell other than the specific secondary cell.
- a control unit wherein the control unit activates the secondary cell based on the information element regarding the secondary cell, and the information element regarding the secondary cell is activated when the secondary cell group is deactivated;
- a wireless communication system that is a stored information element or an information element included in a message requesting activation of the secondary cell group.
- One aspect of the disclosure is a step A of controlling activation of a secondary cell group including a specific secondary cell in which a physical uplink control channel is set and a secondary cell other than the specific secondary cell, and performing communication with the secondary cell group. and B, wherein the step A includes the step of performing activation of the secondary cell based on the information element regarding the secondary cell, the information element regarding the secondary cell is based on the information element regarding the secondary cell group.
- the wireless communication method is an information element stored when activated or an information element included in a message requesting activation of the secondary cell group.
- FIG. 1 is an overall schematic configuration diagram of a radio communication system 10.
- FIG. 2 is a diagram illustrating frequency ranges used in wireless communication system 10.
- FIG. 3 is a diagram showing a configuration example of radio frames, subframes and slots used in the radio communication system 10.
- FIG. 4 is a functional block configuration diagram of UE200.
- FIG. 5 is a functional block configuration diagram of gNB100.
- FIG. 6 is a diagram for explaining an operation example.
- FIG. 7 is a diagram for explaining an operation example.
- FIG. 8 is a diagram for explaining an operation example.
- FIG. 9 is a diagram showing an example of the hardware configuration of gNB100 and UE200.
- FIG. 10 is a diagram showing a configuration example of the vehicle 2001. As shown in FIG.
- FIG. 1 is an overall schematic configuration diagram of a radio communication system 10 according to an embodiment.
- the radio communication system 10 is a radio communication system according to 5G New Radio (NR), and includes a Next Generation-Radio Access Network 20 (hereinafter, NG-RAN 20, and a terminal 200 (hereinafter, UE (User Equipment) 200). .
- NR 5G New Radio
- NG-RAN 20 Next Generation-Radio Access Network
- UE User Equipment
- the wireless communication system 10 may be a wireless communication system according to a system called Beyond 5G, 5G Evolution, or 6G.
- NG-RAN 20 includes a radio base station 100A (hereinafter gNB100A) and a radio base station 100B (hereinafter gNB100B).
- gNB100A radio base station 100A
- gNB100B radio base station 100B
- the specific configuration of the radio communication system 10 including the number of gNBs and UEs is not limited to the example shown in FIG.
- NG-RAN 20 actually includes multiple NG-RAN Nodes, specifically gNBs (or ng-eNBs), and is connected to a 5G-compliant core network (5GC, not shown). Note that NG-RAN 20 and 5GC may simply be referred to as a "network”.
- gNBs or ng-eNBs
- 5GC 5G-compliant core network
- gNB100A and gNB100B are 5G-compliant radio base stations and perform 5G-compliant radio communication with UE200.
- gNB100A, gNB100B and UE200 generate BM beams with higher directivity by controlling radio signals transmitted from multiple antenna elements Massive MIMO (Multiple-Input Multiple-Output), multiple component carriers (CC ), and dual connectivity (DC) in which communication is performed simultaneously between the UE and each of the two NG-RAN Nodes.
- DC may include MR-DC (Multi-RAT Dual Connectivity) using MCG (Master Cell Group) and SCG (Secondary Cell Group).
- a cell belonging to the MCG may be called PCell (Primary Cell), and a cell belonging to SCG (Secondary Cell Group) may be called SCell (Secondary Cell).
- MR-DC includes EN-DC (E-UTRA-NR Dual Connectivity), NE-DC (NR-EUTRA Dual Connectivity) and NR-DC (NR-NR Dual Connectivity).
- CCs (cells) used in CA may be considered to constitute the same cell group.
- MCG and SCG may be considered to constitute the same cell group.
- the wireless communication system 10 supports multiple frequency ranges (FR).
- FIG. 2 shows the frequency ranges used in wireless communication system 10. As shown in FIG.
- the wireless communication system 10 supports FR1 and FR2.
- the frequency bands of each FR are as follows.
- FR1 410MHz to 7.125GHz
- FR2 24.25 GHz to 52.6 GHz
- SCS Sub-Carrier Spacing
- BW bandwidth
- FR2 is higher frequency than FR1 and may use an SCS of 60 or 120 kHz (240 kHz may be included) and a bandwidth (BW) of 50-400 MHz.
- SCS may be interpreted as numerology.
- numerology is defined in 3GPP TS38.300 and corresponds to one subcarrier spacing in the frequency domain.
- the wireless communication system 10 also supports frequency bands higher than the FR2 frequency band. Specifically, the wireless communication system 10 supports frequency bands above 52.6 GHz and up to 71 GHz or 114.25 GHz. Such high frequency bands may be conveniently referred to as "FR2x".
- Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM)/ Discrete Fourier Transform - Spread (DFT-S-OFDM) may be applied.
- FIG. 3 shows a configuration example of radio frames, subframes and slots used in the radio communication system 10.
- one slot consists of 14 symbols, and the larger (wider) the SCS, the shorter the symbol period (and slot period).
- the SCS is not limited to the intervals (frequencies) shown in FIG. For example, 480 kHz, 960 kHz, etc. may be used.
- the number of symbols forming one slot does not necessarily have to be 14 symbols (eg, 28 symbols, 56 symbols). Furthermore, the number of slots per subframe may vary between SCSs.
- time direction (t) shown in FIG. 3 may be called the time domain, symbol period, symbol time, or the like.
- the frequency direction may be called a frequency domain, resource block, subcarrier, bandwidth part (BWP), or the like.
- DMRS is a type of reference signal and is prepared for various channels.
- it may mean a downlink data channel, specifically DMRS for PDSCH (Physical Downlink Shared Channel).
- DMRS for PDSCH Physical Downlink Shared Channel
- an uplink data channel specifically, a DMRS for PUSCH (Physical Uplink Shared Channel) may be interpreted in the same way as a DMRS for PDSCH.
- DMRS can be used for channel estimation in devices, eg, UE 200, as part of coherent demodulation.
- DMRS may reside only in resource blocks (RBs) used for PDSCH transmission.
- a DMRS may have multiple mapping types. Specifically, DMRS has mapping type A and mapping type B. For mapping type A, the first DMRS is placed in the 2nd or 3rd symbol of the slot. In mapping type A, the DMRS may be mapped relative to slot boundaries, regardless of where in the slot the actual data transmission begins. The reason the first DMRS is placed in the second or third symbol of the slot may be interpreted as to place the first DMRS after the control resource sets (CORESET).
- CORESET control resource sets
- mapping type B the first DMRS may be placed in the first symbol of data allocation. That is, the position of the DMRS may be given relative to where the data is located rather than relative to slot boundaries.
- DMRS may have multiple types (Type). Specifically, DMRS has Type 1 and Type 2. Type 1 and Type 2 differ in mapping in the frequency domain and the maximum number of orthogonal reference signals. Type 1 can output up to 4 orthogonal signals with single-symbol DMRS, and Type 2 can output up to 8 orthogonal signals with double-symbol DMRS.
- FIG. 4 is a functional block diagram of the UE200.
- the UE 200 includes a radio signal transmission/reception unit 210, an amplifier unit 220, a modem unit 230, a control signal/reference signal processing unit 240, an encoding/decoding unit 250, a data transmission/reception unit 260, and a control unit 270. .
- the radio signal transmitting/receiving unit 210 transmits/receives radio signals according to NR.
- the radio signal transmitting/receiving unit 210 supports Massive MIMO, CA that bundles multiple CCs, and DC that simultaneously communicates between the UE and each of the two NG-RAN Nodes.
- the radio signal transmitting/receiving unit 210 constitutes a communication unit that communicates with (a cell included in) the SCG.
- the amplifier section 220 is configured by a PA (Power Amplifier)/LNA (Low Noise Amplifier) and the like. Amplifier section 220 amplifies the signal output from modem section 230 to a predetermined power level. In addition, amplifier section 220 amplifies the RF signal output from radio signal transmission/reception section 210 .
- PA Power Amplifier
- LNA Low Noise Amplifier
- the modulation/demodulation unit 230 executes data modulation/demodulation, transmission power setting, resource block allocation, etc. for each predetermined communication destination (gNB 100 or other gNB).
- the modem unit 230 may apply Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM)/Discrete Fourier Transform-Spread (DFT-S-OFDM). Also, DFT-S-OFDM may be used not only for uplink (UL) but also for downlink (DL).
- the control signal/reference signal processing unit 240 executes processing related to various control signals transmitted and received by the UE 200 and processing related to various reference signals transmitted and received by the UE 200.
- control signal/reference signal processing unit 240 receives various control signals transmitted from the gNB 100 via a predetermined control channel, for example, radio resource control layer (RRC) control signals. Also, the control signal/reference signal processing unit 240 transmits various control signals to the gNB 100 via a predetermined control channel.
- RRC radio resource control layer
- the control signal/reference signal processing unit 240 executes processing using reference signals (RS) such as Demodulation Reference Signal (DMRS) and Phase Tracking Reference Signal (PTRS).
- RS reference signals
- DMRS Demodulation Reference Signal
- PTRS Phase Tracking Reference Signal
- a DMRS is a known reference signal (pilot signal) between a terminal-specific base station and a terminal for estimating the fading channel used for data demodulation.
- PTRS is a terminal-specific reference signal for estimating phase noise, which is a problem in high frequency bands.
- reference signals may include Channel State Information-Reference Signal (CSI-RS), Sounding Reference Signal (SRS), and Positioning Reference Signal (PRS) for position information.
- CSI-RS Channel State Information-Reference Signal
- SRS Sounding Reference Signal
- PRS Positioning Reference Signal
- control channels include Physical Downlink Control Channel (PDCCH), Physical Uplink Control Channel (PUCCH), Random Access Channel (RACH), Downlink Control Information (DCI) including Random Access Radio Network Temporary Identifier (RA-RNTI), and Physical Broadcast Channel (PBCH) etc. are included.
- PDCCH Physical Downlink Control Channel
- PUCCH Physical Uplink Control Channel
- RACH Random Access Channel
- DCI Downlink Control Information
- RA-RNTI Random Access Radio Network Temporary Identifier
- PBCH Physical Broadcast Channel
- data channels include PDSCH (Physical Downlink Shared Channel) and PUSCH (Physical Uplink Shared Channel).
- Data means data transmitted over a data channel.
- a data channel may be read as a shared channel.
- control signal/reference signal processing unit 240 may receive downlink control information (DCI).
- DCI has existing fields such as DCI Formats, Carrier indicator (CI), BWP indicator, FDRA (Frequency Domain Resource Assignment), TDRA (Time Domain Resource Assignment), MCS (Modulation and Coding Scheme), HPN (HARQ Process Number) , NDI (New Data Indicator), RV (Redundancy Version), etc.
- the value stored in the DCI Format field is an information element that specifies the DCI format.
- the value stored in the CI field is an information element that specifies the CC to which DCI is applied.
- the value stored in the BWP indicator field is an information element that specifies the BWP to which DCI applies.
- the BWP that can be specified by the BWP indicator is configured by an information element (BandwidthPart-Config) included in the RRC message.
- the value stored in the FDRA field is an information element that specifies the frequency domain resource to which DCI is applied.
- a frequency domain resource is identified by a value stored in the FDRA field and an information element (RA Type) included in the RRC message.
- the value stored in the TDRA field is an information element that specifies the time domain resource to which DCI applies.
- the time domain resource is specified by the value stored in the TDRA field and information elements (pdsch-TimeDomainAllocationList, pusch-TimeDomainAllocationList) included in the RRC message.
- a time-domain resource may be identified by a value stored in the TDRA field and a default table.
- the value stored in the MCS field is an information element that specifies the MCS to which DCI applies.
- the MCS is specified by the values stored in the MCS and the MCS table.
- the MCS table may be specified by RRC messages or identified by RNTI scrambling.
- the value stored in the HPN field is an information element that specifies the HARQ Process to which DCI is applied.
- the value stored in NDI is an information element for specifying whether data to which DCI is applied is initial transmission data.
- the value stored in the RV field is an information element that specifies the data redundancy
- the encoding/decoding unit 250 performs data segmentation/concatenation, channel coding/decoding, etc. for each predetermined communication destination (gNB 100 or other gNB).
- the encoding/decoding unit 250 divides the data output from the data transmission/reception unit 260 into pieces of a predetermined size, and performs channel coding on the divided data. Also, encoding/decoding section 250 decodes the data output from modem section 230 and concatenates the decoded data.
- the data transmission/reception unit 260 executes transmission/reception of Protocol Data Unit (PDU) and Service Data Unit (SDU). Specifically, the data transmitting/receiving unit 260 performs PDU/SDU in multiple layers (medium access control layer (MAC), radio link control layer (RLC), packet data convergence protocol layer (PDCP), etc.). Assemble/disassemble etc. The data transmission/reception unit 260 also performs data error correction and retransmission control based on HARQ (Hybrid Automatic Repeat Request).
- MAC medium access control layer
- RLC radio link control layer
- PDCP packet data convergence protocol layer
- HARQ Hybrid Automatic Repeat Request
- the control unit 270 controls each functional block that configures the UE200.
- controller 270 constitutes a controller that controls activation of the SCG.
- the control unit 270 may control deactivation of the SCG.
- the SCG may include a specific secondary cell configured with a physical uplink control channel (PUCCH) and secondary cells other than the specific secondary cell.
- a specific secondary cell may be referred to as a PUCCH SCell or a PSCell (Primary Secondary Cell).
- a specific secondary cell is hereinafter referred to as a PSCell.
- a secondary cell other than a specific secondary cell may simply be referred to as an SCell.
- Activation of SCG may be referred to as SCG activation.
- Deactivation of SCG may be referred to as SCG deactivation.
- the control unit 270 may activate the SCell based on information elements related to the SCell. SCell activation may be performed without MAC CE messages.
- the SCell-related information element may be considered an information element for SCell activation.
- the information element for SCell may be referred to as sCellState.
- the SCell-related information element may be the information element that was stored when the SCG was deactivated. That is, the SCell-related information element is an information element that is referred to when UE 200 activates an SCell with which UE 200 has been communicating before SCG deactivation.
- the SCell-related information element may be an information element included in a message requesting SCG activation.
- the message may be an RRC message.
- the RRC message may be called SCG activation indication.
- information elements related to SCells are not limited to SCells that UE200 was communicating with before SCG deactivation, but are information elements that are referred to in activation of SCells selected on the NW side.
- SCellState-r16 defined in 3GPP TS38.331 may be used for information elements related to SCell.
- SCG activation may be added as a condition for setting sCellState-r16 to activated. That is, the SCell-related information element may be considered an extension of sCellState-r16.
- the SCell-related information element may be a newly defined information element.
- the SCell-related information element may be considered an information element for activating the SCell without using a MAC CE message in SCG activation.
- information elements related to SCell may be included in information elements related to SCell configuration (for example, SCellConfig).
- the SCell Config may include at least an information element that identifies the SCell (eg, sCellIndex).
- SCell Config may be included in an information element (eg, CellGroupConfig) regarding MSG or SCG configuration.
- FIG. 5 is a functional block configuration diagram of gNB100. As shown in FIG. 5, the gNB 100 has a receiver 110, a transmitter 120 and a controller .
- the receiving unit 110 receives various signals from the UE200.
- the receiver 110 may receive the UL signal via PUCCH or PUSCH.
- the receiving unit 110 may receive a message requesting SCG activation from the UE 200.
- the transmission unit 120 transmits various signals to the UE200.
- Transmitting section 120 may transmit the DL signal via PDCCH or PDSCH.
- the transmitting unit 120 may transmit a message requesting SCG activation to the UE200.
- At least one of the receiving unit 110 and the transmitting unit 120 constitutes a communication unit that communicates with the UE200.
- the control unit 130 controls the gNB100.
- the control unit 130 constitutes a control unit that controls activation of the SCG.
- the control unit 130 may control deactivation of the SCG.
- Control section 130 may assume that UE 200 activates the SCell based on the SCell-related information element.
- SCG deactivated state A state in which the SCG is deactivated (SCG deactivated state) is being studied in order to reduce the power consumption of the UE 200 and the NW. For example, UE 200 does not perform operations such as PUSCH transmission, SRS transmission, and PDCCH monitoring in the SCG deactivated state.
- SCG activation can be divided into PSCell activation and SCell activation.
- Activation of the PSCell may be executed with a NW trigger or with a UE200 trigger.
- the NW eg, MN; Master Node
- the NW transmits a message requesting SCG activation (eg, SCG activation indication) to the UE.
- UE200 may transmit a message requesting activation of SCG to NW (for example, MN), and may transmit a message requesting activation of SCG to NW.
- a connection e.g., PRACH transmission
- the NW e.g., SN; Secondary Node
- SCell activation is assumed to be performed by transmitting a MAC CE message from the NW (eg, PSCell) to UE 200 after PSCell activation.
- NW eg, PSCell
- the inventors found that the signaling load associated with SCell activation can be reduced by omitting the transmission of MAC CE messages that are assumed for SCell activation.
- Option 1 describes a case where the information element stored when the SCG was deactivated is used as the information element regarding the SCell, and the SCG activation is executed by the NW trigger.
- step S10 the UE 200 executes SCG deactivation.
- the UE 200 has received the information element regarding the SCell before SCG deactivation and stores the information element regarding the SCell.
- the SCell-related information element may be (an extension of) sCellState-r16, or may be a newly defined information element.
- the NG-RAN 20 transmits a message requesting SCG activation to the UE 200.
- the entity sending the message may be the MCG (MN).
- the message may be an RRC message.
- the RRC message may be called SCG activation indication.
- the RRC message may be RRCReconfiguration.
- the UE 200 refers to the information element regarding the SCell.
- Information elements for SCell are information elements that were stored when the SCG was deactivated.
- step S13 the UE 200 executes SCG activation. Specifically, the UE 200 activates the PSCell and activates the SCell. Activation of SCell may be performed simultaneously with activation of PSCell, or may be performed after activation of PSCell. It should be noted that transmission of a MAC CE message from the PSCell to the UE 200 is not required when activating the SCell.
- Option 2 describes a case where the information element stored when the SCG was deactivated is used as the information element regarding the SCell, and the SCG activation is executed with the UE 200 trigger.
- step S20 the UE 200 executes SCG deactivation.
- the UE 200 has received the information element regarding the SCell before SCG deactivation and stores the information element regarding the SCell.
- the SCell-related information element may be (an extension of) sCellState-r16, or may be a newly defined information element.
- the UE 200 transmits a message requesting SCG activation to the NG RAN 20.
- the destination of the message may be the MCG (MN).
- the message may be an RRC message.
- the RRC message may be called SCG activation indication.
- the RRC message may be UEAssistanceInformation or may be a newly defined message.
- step S21 may be omitted.
- the UE 200 refers to the information element regarding the SCell.
- Information elements for SCell are information elements that were stored when the SCG was deactivated.
- step S23 the UE 200 executes SCG activation. Specifically, the UE 200 activates the PSCell and activates the SCell. Activation of SCell may be performed simultaneously with activation of PSCell, or may be performed after activation of PSCell. It should be noted that transmission of a MAC CE message from the PSCell to the UE 200 is not required when activating the SCell.
- Option 3 describes a case where an information element included in a message requesting activation of SCG is used as an information element related to SCell, and SCG activation is performed with a NW trigger.
- step S30 the UE 200 executes SCG deactivation.
- UE 200 may have received information elements regarding SCells before SCG deactivation, and may store information elements regarding SCells.
- the SCell-related information element may be (an extension of) sCellState-r16, or may be a newly defined information element.
- the NG-RAN 20 transmits a message requesting SCG activation to the UE 200.
- the entity sending the message may be the MCG (MN).
- the message may be an RRC message.
- the RRC message may be called SCG activation indication.
- the RRC message may be RRCReconfiguration.
- the message requesting activation of the SCG contains an information element regarding the SCell.
- the SCell-related information element may be (an extension of) sCellState-r16, or may be a newly defined information element.
- the UE 200 refers to the information element regarding the SCell.
- the information element regarding SCell is an information element included in the message received in step S31.
- step S33 the UE 200 executes SCG activation. Specifically, the UE 200 activates the PSCell and activates the SCell. Activation of SCell may be performed simultaneously with activation of PSCell, or may be performed after activation of PSCell. It should be noted that transmission of a MAC CE message from the PSCell to the UE 200 is not required when activating the SCell.
- the UE 200 activates the SCell based on the SCell-related information element included in the message received in step S31.
- the operation example described above is not limited to this.
- UE 200 determines whether the SCell is active based on the information element stored when the SCG was deactivated, similar to option 1. You may perform a transformation. In such cases, the information elements that were stored when the SCG was deactivated are retained in the UE 200 as they are.
- the information element included in the message requesting activation of the SCG is an update of the information element stored when the SCG was deactivated. can be considered to be used for
- the UE 200 activates the SCell based on the information element regarding the SCell. According to such a configuration, it is possible to omit transmission of MAC CE from PSCell to UE 200 and reduce the signaling load associated with activation of SCell.
- PSCell in SCG activation, PSCell is activated by an RRC message requesting SCG activation (Direct SCell activation).
- a PSCell may be activated by a MAC CE message requesting PSCell activation (Normal SCell activation). Even in such a case, the SCell may be activated without using the MAC CE message.
- the SCell-related information element may be included in an RRC message requesting SCG activation, or may be included in a MAC CE message requesting PS Cell activation.
- each functional block may be implemented using one device that is physically or logically coupled, or directly or indirectly using two or more devices that are physically or logically separated (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. 9 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. 4) 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 program a program that causes a computer to execute at least part of the operations described in the above embodiments is used.
- the above-described various processes 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 a combination thereof
- RRC signaling may also be referred to as RRC messages, e.g., RRC Connection Setup ) message, RRC Connection Reconfiguration message, or the like.
- 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 object may be a vehicle (e.g., car, airplane, etc.), an unmanned mobile object (e.g., drone, self-driving car, etc.), or a robot (manned or unmanned ).
- at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations.
- at least one of the base station and mobile station may be an Internet of Things (IoT) device such as a sensor.
- IoT Internet of Things
- the base station in the present disclosure may be read as a mobile station (user terminal, hereinafter the same).
- communication between a base station and a mobile station is replaced with communication between multiple mobile stations (for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.)
- the mobile station may have the functions that the base station has.
- words such as "up” and “down” may be replaced with words corresponding to inter-terminal communication (for example, "side”).
- uplink channels, downlink channels, etc. may be read as side channels.
- a mobile station in the present disclosure may be read as a base station.
- the base station may have the functions that the mobile station has.
- a radio frame may consist of one or more frames in the time domain. Each frame or frames in the time domain may be referred to as a subframe.
- a subframe may further 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
- TTI transmission time interval
- TTI transmission time interval
- 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 normal 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 be configured with one or a plurality of resource blocks.
- One or more RBs are physical resource blocks (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 the 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 optical (both visible and invisible) regions, and the like.
- the reference signal can also be abbreviated as Reference Signal (RS), and may also be called Pilot depending on the applicable standard.
- RS Reference Signal
- any reference to elements using the "first”, “second”, etc. designations used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, references to first and second elements do not imply that only two elements may be employed therein, or that the first element must precede the second element in any way.
- determining and “determining” used in this disclosure may encompass a wide variety of actions.
- “Judgement” and “determination” are, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (eg, lookup in a table, database, or other data structure), ascertaining as “judged” or “determined”, and the like.
- "judgment” and “determination” are used for receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, access (accessing) (for example, accessing data in memory) may include deeming that a "judgment” or “decision” has been made.
- judgment and “decision” are considered to be “judgment” and “decision” by resolving, selecting, choosing, establishing, comparing, etc. can contain.
- judgment and “decision” may include considering that some action is “judgment” and “decision”.
- judgment (decision) may be read as “assuming”, “expecting”, “considering”, or the like.
- a and B are different may mean “A and B are different from each other.”
- the term may also mean that "A and B are different from C”.
- Terms such as “separate,” “coupled,” etc. may also be interpreted in the same manner as “different.”
- FIG. 10 shows a configuration example of a vehicle 2001.
- a vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, left and right front wheels 2007, left and right rear wheels 2008, axles 2009, an electronic control unit 2010, It has various sensors 2021 to 2029, an information service unit 2012 and a communication module 2013.
- the driving unit 2002 is composed of, for example, an engine, a motor, or a hybrid of the engine and the motor.
- the steering unit 2003 includes at least a steering wheel (also referred to as a steering wheel), and is configured to steer at least one of the front wheels and rear wheels based on the operation of the steering wheel operated by the user.
- a steering wheel also referred to as a steering wheel
- the electronic control unit 2010 is composed of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals from various sensors 2021 to 2027 provided in the vehicle are input to the electronic control unit 2010 .
- the electronic control unit 2010 may be called an ECU (Electronic Control Unit).
- the signals from various sensors 2021 to 2028 include the current signal from the current sensor 2021 that senses the current of the motor, the rotation speed signal of the front and rear wheels obtained by the rotation speed sensor 2022, and the front wheel obtained by the air pressure sensor 2023. and rear wheel air pressure signal, vehicle speed signal obtained by vehicle speed sensor 2024, acceleration signal obtained by acceleration sensor 2025, accelerator pedal depression amount signal obtained by accelerator pedal sensor 2029, brake pedal sensor 2026 obtained by There are a brake pedal depression amount signal, a shift lever operation signal acquired by the shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. acquired by the object detection sensor 2028, and the like.
- the information service unit 2012 includes various devices such as car navigation systems, audio systems, speakers, televisions, and radios for providing various information such as driving information, traffic information, and entertainment information, and one or more devices for controlling these devices. It consists of an ECU and The information service unit 2012 uses information acquired from an external device via the communication module 2013 and the like to provide passengers of the vehicle 1 with various multimedia information and multimedia services.
- Driving support system unit 2030 includes millimeter wave radar, LiDAR (Light Detection and Ranging), camera, positioning locator (e.g. GNSS), map information (e.g. high-definition (HD) map, autonomous vehicle (AV) map, etc. ), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, and AI processors to prevent accidents and reduce the driver's driving load. and one or more ECUs that control these devices.
- the driving support system unit 2030 transmits and receives various information via the communication module 2013, and realizes a driving support function or an automatic driving function.
- the communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 1 via communication ports.
- the communication module 2013 communicates with the vehicle 2001 through a communication port 2033 a driving unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, left and right front wheels 2007, left and right rear wheels 2008, Data is sent and received between axle 2009, microprocessor 2031 and memory (ROM, RAM) 2032 in electronic control unit 2010, and sensors 2021-2028.
- the communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with an external device. For example, it transmits and receives various information to and from an external device via wireless communication.
- Communication module 2013 may be internal or external to electronic control 2010 .
- the external device may be, for example, a base station, a mobile station, or the like.
- the communication module 2013 transmits the current signal from the current sensor input to the electronic control unit 2010 to the external device via wireless communication.
- the communication module 2013 receives, from the electronic control unit 2010, the rotation speed signals of the front and rear wheels obtained by the rotation speed sensor 2022, the air pressure signals of the front and rear wheels obtained by the air pressure sensor 2023, and the vehicle speed sensor. 2024, the acceleration signal obtained by the acceleration sensor 2025, the accelerator pedal depression amount signal obtained by the accelerator pedal sensor 2029, the brake pedal depression amount signal obtained by the brake pedal sensor 2026, and the shift lever.
- a shift lever operation signal obtained by the sensor 2027 and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by the object detection sensor 2028 are also transmitted to an external device via wireless communication.
- the communication module 2013 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from external devices and displays it on the information service unit 2012 provided in the vehicle. Communication module 2013 also stores various information received from external devices in memory 2032 available to microprocessor 2031 . Based on the information stored in the memory 2032, the microprocessor 2031 controls the driving unit 2002, the steering unit 2003, the accelerator pedal 2004, the brake pedal 2005, the shift lever 2006, the left and right front wheels 2007, and the left and right rear wheels provided in the vehicle 2001. 2008, axle 2009, sensors 2021-2028, etc. may be controlled.
- various information traffic information, signal information, inter-vehicle information, etc.
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Abstract
Description
(1)無線通信システムの全体概略構成
図1は、実施形態に係る無線通信システム10の全体概略構成図である。無線通信システム10は、5G New Radio(NR)に従った無線通信システムであり、Next Generation-Radio Access Network 20(以下、NG-RAN20、及び端末200(以下、UE(User Equipment)200)を含む。
・FR2:24.25 GHz~52.6 GHz
FR1では、15, 30又は60kHzのSub-Carrier Spacing(SCS)が用いられ、5~100MHzの帯域幅(BW)が用いられてもよい。FR2は、FR1よりも高周波数であり、60,又は120kHz(240kHzが含まれてもよい)のSCSが用いられ、50~400MHzの帯域幅(BW)が用いられてもよい。
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。
次に、SCG activation/deactivationの導入における課題について説明する。SCGが非活性化された状態(SCG deactivated state)は、UE200及びNWの消費電力を削減するために検討されている。例えば、UE200は、SCG deactivated stateにおいて、PUSCHの送信、SRS送信、PDCCHの監視などの動作を実行しない。
次に、上述した課題に対する動作例について説明する。SCellの活性化で参照する情報要素及びSCG activationのトリガーの組合せに応じて、動作例としては、以下に示すオプションが考えられる。
オプション1では、SCellに関する情報要素として、SCGが非活性化されたときに格納されていた情報要素が用いられ、NWトリガーでSCG activatinが実行されるケースについて説明する。
オプション2では、SCellに関する情報要素として、SCGが非活性化されたときに格納されていた情報要素が用いられ、UE200トリガーでSCG activatinが実行されるケースについて説明する。
オプション3では、SCellに関する情報要素として、SCGの活性化を要求するメッセージに含まれる情報要素が用いられ、NWトリガーでSCG activatinが実行されるケースについて説明する。
実施形態では、UE200は、SCellに関する情報要素に基づいて、SCellの活性化を実行する。このような構成によれば、PSCellからUE200へのMAC CEの送信を省略することができ、SCellの活性化に伴うシグナリング負荷を軽減することができる。
以上、実施形態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。
20 NG-RAN
100 gNB
110 受信部
120 送信部
130 制御部
200 UE
210 無線信号送受信部
220 アンプ部
230 変復調部
240 制御信号・参照信号処理部
250 符号化/復号部
260 データ送受信部
270 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
2001 車両
2002 駆動部
2003 操舵部
2004 アクセルペダル
2005 ブレーキペダル
2006 シフトレバー
2007 左右の前輪
2008 左右の後輪
2009 車軸
2010 電子制御部
2012 情報サービス部
2013 通信モジュール
2021 電流センサ
2022 回転数センサ
2023 空気圧センサ
2024 車速センサ
2025 加速度センサ
2026 ブレーキペダルセンサ
2027 シフトレバーセンサ
2028 物体検出センサ
2029 アクセルペダルセンサ
2030 運転支援システム部
2031 マイクロプロセッサ
2032 メモリ(ROM, RAM)
2033 通信ポート
Claims (7)
- 物理上りリンク制御チャネルが設定される特定セカンダリセル及び前記特定セカンダリセル以外のセカンダリセルを含むセカンダリセルグループの活性化を制御する制御部と、
前記セカンダリセルグループと通信を実行する通信部と、を備え、
前記制御部は、前記セカンダリセルに関する情報要素に基づいて、前記セカンダリセルの活性化を実行し、
前記セカンダリセルに関する情報要素は、前記セカンダリセルグループが非活性化されたときに格納されていた情報要素、又は、前記セカンダリセルグループの活性化を要求するメッセージに含まれる情報要素である、端末。 - 前記制御部は、前記メッセージに応じて、前記セカンダリセルグループが非活性化されたときに格納されていた情報要素に基づいて、前記セカンダリセルの活性化を実行する、請求項1に記載の端末。
- 前記制御部は、前記セカンダリセルグループが非活性化されたときに格納されていた情報要素に基づいて、前記セカンダリセルの活性化を自律的に実行する、請求項1に記載の端末。
- 前記制御部は、前記メッセージに応じて、前記メッセージに含まれる情報要素に基づいて、前記セカンダリセルの活性化を実行する、請求項1に記載の端末。
- 物理上りリンク制御チャネルが設定される特定セカンダリセル及び前記特定セカンダリセル以外のセカンダリセルを含むセカンダリセルグループの活性化を制御する制御部と、
端末と通信を実行する通信部と、を備え、
前記制御部は、前記セカンダリセルに関する情報要素に基づいて、前記セカンダリセルの活性化を前記端末が実行することを想定し、
前記セカンダリセルに関する情報要素は、前記セカンダリセルグループが非活性化されたときに格納されていた情報要素、又は、前記セカンダリセルグループの活性化を要求するメッセージに含まれる情報要素である、基地局。 - 端末と基地局とを備え、
前記端末は、物理上りリンク制御チャネルが設定される特定セカンダリセル及び前記特定セカンダリセル以外のセカンダリセルを含むセカンダリセルグループの活性化を制御する制御部を備え、
前記制御部は、前記セカンダリセルに関する情報要素に基づいて、前記セカンダリセルの活性化を実行し、
前記セカンダリセルに関する情報要素は、前記セカンダリセルグループが非活性化されたときに格納されていた情報要素、又は、前記セカンダリセルグループの活性化を要求するメッセージに含まれる情報要素である、無線通信システム。 - 物理上りリンク制御チャネルが設定される特定セカンダリセル及び前記特定セカンダリセル以外のセカンダリセルを含むセカンダリセルグループの活性化を制御するステップAと、
前記セカンダリセルグループと通信を実行するステップBと、を備え、
前記ステップAは、前記セカンダリセルに関する情報要素に基づいて、前記セカンダリセルの活性化を実行するステップを含み、
前記セカンダリセルに関する情報要素は、前記セカンダリセルグループが非活性化されたときに格納されていた情報要素、又は、前記セカンダリセルグループの活性化を要求するメッセージに含まれる情報要素である、無線通信方法。
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