WO2024043295A1 - Terminal, station de base et procédé de communication - Google Patents

Terminal, station de base et procédé de communication Download PDF

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Publication number
WO2024043295A1
WO2024043295A1 PCT/JP2023/030450 JP2023030450W WO2024043295A1 WO 2024043295 A1 WO2024043295 A1 WO 2024043295A1 JP 2023030450 W JP2023030450 W JP 2023030450W WO 2024043295 A1 WO2024043295 A1 WO 2024043295A1
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WO
WIPO (PCT)
Prior art keywords
bwp
terminal
base station
common
specific
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PCT/JP2023/030450
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English (en)
Japanese (ja)
Inventor
優元 ▲高▼橋
聡 永田
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株式会社Ｎｔｔドコモ
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Publication of WO2024043295A1 publication Critical patent/WO2024043295A1/fr

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    • H—ELECTRICITY
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present disclosure relates to a terminal, a base station, and a communication method that support a mechanism that can appropriately reduce power consumption of a network.
  • the 3rd Generation Partnership Project (3GPP) specifies the 5th generation mobile communication system (5G, also known as New Radio (NR) or Next Generation (NG)), and the next generation specifications called Beyond 5G, 5G Evolution, or 6G. is also progressing.
  • 5G also known as New Radio (NR) or Next Generation (NG)
  • NG Next Generation
  • 6G 6th Generation
  • Non-Patent Document 2 the details are a subject for future consideration.
  • the present invention was made to solve the above-mentioned problems, and aims to provide a terminal, a base station, and a communication method that support a mechanism that can appropriately reduce the power consumption of a network.
  • One aspect of the disclosure includes a receiving unit that receives specific downlink control information used in network energy saving, and a control unit that performs bandwidth adaptation in a specific bandwidth portion based on the specific downlink control information. , is a terminal.
  • One aspect of the disclosure includes a transmitter that transmits specific downlink control information used in network energy saving, and a controller that assumes that a terminal performs bandwidth adaptation in a specific bandwidth portion based on the specific downlink control information. It is a base station equipped with .
  • One aspect of the disclosure provides a communication method comprising: receiving specific downlink control information used in network energy saving; and performing bandwidth adaptation in a specific bandwidth portion based on the specific downlink control information. It's a method.
  • FIG. 1 is a diagram illustrating an example of a wireless communication system according to an embodiment.
  • FIG. 3 is a diagram illustrating an example of BWP.
  • FIG. 3 is a diagram illustrating an example of BWP.
  • FIG. 3 is a diagram illustrating an example of BWP.
  • FIG. 3 is a diagram illustrating an example of a common BWP.
  • FIG. 2 is a diagram illustrating an example of proposal-option 1-option 1-1-Alt.1.
  • FIG. 2 is a diagram illustrating an example of proposal-option 1-option 1-1-Alt.1.
  • FIG. 2 is a diagram illustrating an example of proposal-Option 1-Option 1-1-Alt.2.
  • FIG. 3 is a diagram illustrating an example of proposal-option 1-option 1-2.
  • FIG. 2 is a diagram illustrating an example of proposal-option 2-option 2-1-Alt.1.
  • FIG. 2 is a diagram illustrating an example of proposal-option 2-option 2-1-Alt.1.
  • FIG. 2 is a diagram illustrating an example of proposal-option 2-option 2-1-Alt.2.
  • FIG. 3 is a diagram illustrating an example of proposal-option 2-option 2-2.
  • FIG. 3 is a diagram illustrating an example of a BWP indicator field.
  • FIG. 3 is a diagram illustrating an example of a BWP indicator field.
  • FIG. 1 is a block diagram showing an example of the configuration of a base station according to an embodiment.
  • FIG. 2 is a block diagram illustrating an example of the configuration of a terminal according to an embodiment.
  • LTE Long Term Evolution
  • SS Synchronization signal
  • PSS Primary SS
  • SSS Secondary SS
  • PBCH Physical broadcast channel
  • PRACH Physical Use terms such as random access channel
  • PDCCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Shared Channel
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • the duplex method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or other methods (for example, Flexible Duplex, etc.). ) may be used.
  • “configuring" wireless parameters etc. may mean pre-configuring predetermined values, or may mean pre-configuring predetermined values or It may also be possible to set wireless parameters notified from.
  • FIG. 1 is a diagram illustrating an example of a wireless communication system according to an embodiment.
  • the wireless communication system includes a base station 10 and a terminal 20.
  • FIG. 1 shows one base station 10 and one terminal 20, this is just an example, and there may be a plurality of each.
  • the base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20.
  • the physical resources of a radio signal are defined in the time domain and frequency domain, and the time domain may be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain may be defined by the number of subcarriers or resource blocks. Good too.
  • the TTI Transmission Time Interval
  • the time domain may be a slot, or the TTI may be a subframe.
  • the base station 10 transmits a synchronization signal and system information to the terminal 20.
  • the synchronization signals are, for example, NR-PSS and NR-SSS.
  • System information is transmitted, for example, on NR-PBCH, and is also referred to as broadcast information.
  • the synchronization signal and system information may be called SSB (SS/PBCH block).
  • the base station 10 transmits a control signal or data to the terminal 20 via DL (Downlink), and receives the control signal or data from the terminal 20 via UL (Uplink). Both the base station 10 and the terminal 20 can perform beamforming to transmit and receive signals. Furthermore, both the base station 10 and the terminal 20 can apply MIMO (Multiple Input Multiple Output) communication to DL or UL.
  • MIMO Multiple Input Multiple Output
  • both the base station 10 and the terminal 20 may communicate via a secondary cell (SCell) and a primary cell (PCell) using CA (Carrier Aggregation). Furthermore, the terminal 20 may communicate via a primary cell of the base station 10 and a primary SCG cell (PSCell) of another base station 10 using DC (Dual Connectivity).
  • SCell secondary cell
  • PCell primary cell
  • DC Direct Connectivity
  • the terminal 20 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable terminal, or a communication module for M2M (Machine-to-Machine).
  • the terminal 20 uses various communication services provided by the wireless communication system by receiving control signals or data from the base station 10 via DL and transmitting control signals or data to the base station 10 via UL.
  • the terminal 20 receives various reference signals transmitted from the base station 10, and measures the channel quality based on the reception results of the reference signals.
  • the terminal 20 may be called a UE, and the base station 10 may be called a gNB.
  • ⁇ BWP> the maximum bandwidth per carrier is, for example, 100MHz at frequencies below 6GHz and 400MHz at frequencies above that, which is significantly larger than in LTE.
  • 3GPP (NR) Release 15-2010 is required to enable terminals that support only a smaller bandwidth to communicate using carriers that operate with a wide bandwidth. 17 will support a technology called Bandwidth Part (BWP).
  • BWP Bandwidth Part
  • BWP Bandwidth Part
  • the base station sets (provides) information regarding BWP to the terminal.
  • the terminal has serving cell parameters for each DL BWP or UL BWP in one set of DL BWP (downlink BWP) or UL BWP (uplink BWP).
  • the terminal is provided with the following parameters:
  • RIV is determined by the following formula (see e.g. 3GPP TS38.214 V17.1.0 Sec.6.1.2.2.2):
  • 3GPP Release 15-17 supports a technology called BWP switching that switches between BWPs.
  • the terminal performs BWP switching by a timer such as Radio Resource Control (RRC), Medium Access Control - Control Element (MAC-CE), Downlink Control Information (DCI), or an inactivity timer. be instructed to do so.
  • RRC Radio Resource Control
  • MAC-CE Medium Access Control - Control Element
  • DCI Downlink Control Information
  • DCI format 0_1/0_2/1_1/1_2 is used for BWP switching.
  • the terminal receives PDSCH and/or transmits PUSCH while dynamically switching BWP.
  • the timer is used to allow the terminal to fall back to the default DL BWP, allowing DCI false positives to indicate a BWP switch.
  • the timer is set by RRC in millisecond time units.
  • the timer starts subtracting from the value configured by the RRC, for example, if there is a downlink or uplink grant or if there is a configured downlink or uplink channel. , or restart (eg, reset the value set by RRC and start subtracting).
  • the timer does not expire if there is downlink or uplink permission, or if there is a configured downlink or uplink channel, and the terminal changes the BWP to the default DL BWP. No fallback.
  • the timer determines the remaining period of the timer at the end of a subframe for Frequency Range (FR) 1 frequency bands, or at the end of half a subframe for FR2 frequency bands, e.g. , subtract.
  • the terminal falls back to the default DL BWP when the timer expires (e.g., the value set by RRC becomes 0).
  • the BWP assumed (set) by the terminal is different from the BWP assumed by the base station and the terminal cannot receive the DCI indicating BWP switching
  • the BWP will be changed by the expiration of the timer. reverts to the default DL BWP.
  • the terminal can receive DCI indicating BWP switching in the default DL BWP.
  • the default DL BWP is the BWP set by "defaultDownlinkBWP-Id" (if set), otherwise it is the initial BWP. For example, if the default DL BWP is not set by "defaultDownlinkBWP-Id", the terminal assumes that the initial BWP used for initial access is the default DL BWP.
  • BWP switching is performed on both downlink and uplink.
  • ⁇ Consideration> As mentioned above in ⁇ Base station power saving>, the technology for saving power consumption of base stations has not been standardized in 3GPP. With regard to BWP switching, there is room for consideration of technology that realizes Energy Saving (ES) from the perspective of base stations.
  • ES Energy Saving
  • Common BWP is set. For example, in BWP switching, a common BWP is set for a base station and a terminal.
  • FIG. 5 is a diagram illustrating an example of a common BWP.
  • FIG. 5 shows BWP1 to BWP4 of terminals UE1 to UE4 as an example.
  • the terminals UE1 to UE4 switch from BWP1 to BWP4 to common BWP, as shown by arrow A5A in FIG. 5, for example, based on an instruction from the base station or a timer. This operation narrows the communication bandwidth from the base station's point of view and realizes ES.
  • a common BWP may be regarded as a BWP in which the BWP frequencies of multiple terminals are aligned and the BWP bandwidths of multiple terminals are set to be the same.
  • the common BWP may be referred to as NW ES BWP or ES BWP.
  • NW is an abbreviation for network.
  • the plurality of common BWPs may have different bandwidths. Any one of the plurality of common BWPs having different bandwidths may be selected depending on the mode, service, or type of the NW ES, for example.
  • the common BWP is set for each cell.
  • a common BWP is configured using parameters that are commonly configured for all terminals within a cell.
  • the parameters are notified to the terminal from the base station, for example.
  • the parameters may be, for example, parameters of higher layer signaling such as RRC (upper layer parameters).
  • the parameters are, for example, parameters set for each cell (cell unit), and may be referred to as cell-specific parameters.
  • the common BWP for NW ES is configured by new parameters such as "EnergySavingBWP" included in “ServingCellConfigCommon” and/or “DownlinkConfigCommon” and/or "UplinkConfigCommon".
  • "ServingCellConfigCommon”, “DownlinkConfigCommon”, and “UplinkConfigCommon” may be referred to as Information Elements (IEs) or parameters.
  • IEs Information Elements
  • the common BWP is set in ServingCellConfigCommon.
  • the EnergySavingBWP parameter for the common BWP is configured in ServingCellConfigCommon.
  • the common BWP is set individually in DL and UL, the common BWP is set in each of "DownlinkConfigCommon" and "UplinkConfigCommon".
  • the common BWP is configured separately in the DL and UL, the EnergySavingBWP parameter for the DL common BWP is configured in DownlinkConfigCommon, and the EnergySavingBWP parameter for the UL common BWP is configured in UplinkConfigCommon.
  • the base station uses cell-specific parameters to set a common BWP to the terminal for each cell, thereby reducing overhead such as exchanging parameters.
  • option 1 the following options 1-1 and 1-2 are further proposed.
  • BWP Id may be set by EnergySavingBWP.
  • BWP Id is, for example, an identifier that identifies a BWP. That is, the BWP Id that identifies the common BWP may be set by the EnergySavingBWP parameter.
  • the BWP Id of the common BWP may be one of the legacy BWP Ids.
  • the legacy BWP Id is, for example, the BWP Id used in 3GPP Release 15-17.
  • FIG. 6 is a diagram illustrating an example of proposal-option 1-option 1-1-Alt.1.
  • “downlinkBWP-ToAddModList” shown in FIG. 6 is a list of BWP Ids managed in the base station and terminal.
  • the base station and terminal can set up to four BWPs in addition to the initial BWP (#0).
  • the base station and the terminal switch the BWP, for example, at the BWP Id (#0 to #4 in the example of FIG. 6) shown in "downlinkBWP-ToAddModList".
  • the BWP Id of the common BWP may be one of the legacy BWP Ids.
  • the legacy BWP Ids “#0 to #4”, “#1” is linked (set) to the BWP Id of the common BWP.
  • FIG. 7 is a diagram illustrating an example of proposal-option 1-option 1-1-Alt.1.
  • the BWP Id of the common BWP is notified to the terminal in upper layer signaling such as RRC, for example.
  • the BWP Id of the common BWP may be linked to the EnergySavingBWP parameter of ServingCellConfigCommon.
  • the BWP Id of the common BWP is set by the EnergySavingBWP parameter of the ServingCellConfig from the base station. For example, in DCI format 0_1/0_2/1_1/1_2, the terminal switches the BWP to the common BWP when the BWP Id of the common BWP is notified or due to the expiration of a timer (e.g., ⁇ proposal-option 3 below) > and ⁇ Proposal - Option 4>).
  • a timer e.g., ⁇ proposal-option 3 below
  • the EnergySavingBWP parameter of ServingCellConfig has been described, but the BWP Id of the common BWP is also linked to the EnergySavingBWP parameter of DownlinkConfigCommon.
  • the BWP Id of the common BWP is also linked in the EnergySavingBWP parameter of UplinkConfigCommon.
  • BWP Ids of common BWPs may be added.
  • the BWP Id of a common BWP may be added separately from the legacy BWP Id.
  • BWP Ids up to 4 BWP Ids can be set in addition to the BWP Id of the initial BWP, one new BWP Id will be added for the common BWP, apart from the BWP Id of the initial BWP and 4 BWP Ids. It's okay.
  • FIG. 8 is a diagram illustrating an example of proposal-option 1-option 1-1-Alt.2. As shown in Figure 8, for example, in addition to the legacy BWP Ids of “#0 to #4”, the BWP Id of “#5” for the common BWP (indicated as NW ES BWP in Figure 8) will be added.
  • the BWP Id of the common BWP is notified to the terminal in upper layer signaling such as RRC, for example.
  • a new BWP Id for the common BWP is linked to the EnergySavingBWP parameter of ServingCellConfigCommon and is notified to the terminal.
  • the BWP Id of the common BWP is also linked to the EnergySavingBWP parameter of DownlinkConfigCommon.
  • the BWP Id of the common BWP is also linked in the EnergySavingBWP parameter of UplinkConfigCommon.
  • FIG. 9 is a diagram illustrating an example of proposal-option 1-option 1-2. As shown in FIG. 9, for example, whether the common BWP is valid or invalid is set by the EnergySavingBWP parameter of ServingCellConfigCommon.
  • the terminal For example, if the terminal is notified that it is valid by the EnergySavingBWP parameter of ServingCellConfigCommon, it switches the BWP to the common BWP. For example, when the terminal is notified of invalidation by the EnergySavingBWP parameter of ServingCellConfigCommon, it switches from the common BWP to the BWP notified from the base station.
  • the EnergySavingBWP parameter of ServingCellConfigCommon has been described, but the enablement or invalidation of the common BWP is also set in the EnergySavingBWP parameter of DownlinkConfigCommon. Enable or disable of the common BWP is also set in the EnergySavingBWP parameter of UplinkConfigCommon.
  • the common BWP is set for each terminal.
  • the common BWP is configured using parameters that are configured for each terminal.
  • the parameters are notified to the terminal from the base station, for example.
  • the parameters may be, for example, parameters of upper layer signaling such as RRC.
  • the parameters are, for example, parameters set for each terminal, and may be referred to as UE-specific parameters.
  • the common BWP for NW ES is configured by a new parameter such as "EnergySavingBWP" included in "ServingCellConfig” and/or “DownlinkConfig” and/or "UplinkConfig”.
  • “ServingCellConfig”, “DownlinkConfig”, and “UplinkConfig” may be referred to as IEs or parameters.
  • a common BWP is set in common in DL and UL
  • the common BWP is set in ServingCellConfig.
  • an EnergySavingBWP parameter for the common BWP is configured in ServingCellConfig.
  • the common BWP is set individually in DL and UL, the common BWP is set in each of "ServingCellConfig" and "UplinkConfig".
  • the common BWP is configured separately in DL and UL, the EnergySavingBWP parameter for the DL common BWP is configured in ServingCellConfig, and the EnergySavingBWP parameter for the UL common BWP is configured in UplinkConfig.
  • "ServingCellConfig" includes a parameter that sets the BWP Id of the DL's default BWP. The BWP Id of the common BWP in DL may be set in this parameter.
  • the common BWP is set individually in DL and UL, the common BWP is set in each of "DownlinkConfig" and "UplinkConfig".
  • the common BWP is configured separately in DL and UL, the EnergySavingBWP parameter for the common BWP in DL is configured in DownlinkConfig, and the EnergySavingBWP parameter for the common BWP in UL is configured in UplinkConfig.
  • the base station uses the UE-specific parameters to set the common BWP for each terminal, so it is possible to flexibly set the common BWP.
  • the base station can set a common BWP for some terminals.
  • BWP Id may be set by EnergySavingBWP.
  • BWP Id is, for example, an identifier that identifies a BWP. That is, the BWP Id that identifies the common BWP may be set by the EnergySavingBWP parameter.
  • Alt.1 and Alt.2 are proposed as BWP Ids that identify common BWPs.
  • the BWP Id of the common BWP may be one of the legacy BWP Ids.
  • FIG. 10 is a diagram illustrating an example of Proposal-Option 2-Option 2-1-Alt.1.
  • "downlinkBWP-ToAddModList" shown in FIG. 10 is a list of BWP Ids managed in the base station and terminal.
  • the base station and terminal can set up to four BWPs in addition to the initial BWP (#0).
  • the base station and the terminal switch the BWP, for example, at the BWP Id (#0 to #4 in the example of FIG. 10) shown in "downlinkBWP-ToAddModList".
  • the BWP Id of the common BWP may be one of the legacy BWP Ids.
  • the legacy BWP Ids "#0 to #4”, "#1" is linked to the BWP Id of the common BWP.
  • FIG. 11 is a diagram illustrating an example of proposal-option 2-option 2-1-Alt.1.
  • the BWP Id of the common BWP is notified to the terminal in upper layer signaling such as RRC, for example.
  • the BWP Id of the common BWP may be linked to the EnergySavingBWP parameter of the ServingCellConfig.
  • the BWP Id of the common BWP is set, for example, by the EnergySavingBWP parameter of the ServingCellConfig from the base station. For example, in DCI format 0_1/0_2/1_1/1_2, the terminal switches the BWP to the common BWP when the BWP Id of the common BWP is notified or due to the expiration of a timer (e.g., ⁇ proposal-option 3 below) > and ⁇ Proposal - Option 4>).
  • a timer e.g., ⁇ proposal-option 3 below
  • the EnergySavingBWP parameter of ServingCell was explained, but the BWP Id of the common BWP is also linked to the EnergySavingBWP parameter of DownlinkConfig.
  • the BWP Id of the common BWP is also linked in the EnergySavingBWP parameter of UplinkConfig.
  • BWP Ids of common BWPs may be added.
  • the BWP Id of a common BWP may be added separately from the legacy BWP Id.
  • up to 4 BWP Ids can be set in addition to the BWP Id of the initial BWP, even if one BWP Id is added for the common BWP in addition to the BWP Id of the initial BWP and the 4 BWP Ids. good.
  • FIG. 12 is a diagram illustrating an example of proposal-option 2-option 2-1-Alt.2. As shown in Figure 12, for example, in addition to the legacy BWP IDs "#0 to #4", the BWP ID "#5" is added for the common BWP (indicated as NW ES BWP in Figure 12). will be added.
  • the BWP Id of the common BWP is notified to the terminal in upper layer signaling such as RRC, for example.
  • a new BWP Id for the common BWP is linked to the EnergySavingBWP parameter of ServingCellConfig and notified to the terminal.
  • the BWP Id of the common BWP is linked to the EnergySavingBWP parameter of DownlinkConfig.
  • the BWP Id of the common BWP is also linked in the EnergySavingBWP parameter of UplinkConfig.
  • FIG. 13 is a diagram illustrating an example of proposal-option 2-option 2-2. As shown in FIG. 13, for example, whether the common BWP is valid or invalid is set by the EnergySavingBWP parameter of ServingCellConfig.
  • the terminal For example, if the terminal is notified that it is valid by the EnergySavingBWP parameter of ServingCellConfig, it switches the BWP to the common BWP. For example, when the terminal is notified of invalidity by the EnergySavingBWP parameter of ServingCellConfig, it switches from the common BWP to the BWP notified from the base station.
  • the EnergySavingBWP parameter of the ServingCellConfig has been described, but the enablement or invalidation of the common BWP is also set in the EnergySavingBWP parameter of the DownlinkConfig. Enable or disable of the common BWP is also set in the EnergySavingBWP parameter of UplinkConfig.
  • the terminal is instructed to switch to the common BWP for the NW ES using a terminal-specific DCI format (UE-specific DCI format) or a group-common DCI format (group-common DCI format).
  • UE-specific DCI format terminal-specific DCI format
  • group-common DCI format group-common DCI format
  • the terminal-specific DCI format may be, for example, DCI format 0_1/0_2/1_1/1_2.
  • the group-common DCI format may be, for example, a new DCI format that is notified to the group to which the terminal belongs.
  • the group common DCI format for example, in individual formats, DL BWP switching and UL BWP switching may be individually instructed, or in a common format, DL BWP switching and UL BWP switching may be instructed individually. Further, the group-common DCI format may commonly instruct DL BWP switching and UL BWP switching.
  • the bit width of the BWP indicator field may be similar to 3GPP Release 15-17, eg, 0, 1, or 2 bits.
  • the BWP indicator field is a bit field for identifying BWP Id, and the BWP Id is notified from the base station to the terminal using this field.
  • bit width of the BWP indicator field is shown below.
  • n BWP parameter set by upper layer signaling
  • the BWP indicator is equivalent to the ascending order of the upper layer parameter “BWP-Id”.
  • bit width of the BWP indicator field is defined as shown in FIG. 14, for example.
  • the bit width of the BWP indicator field may be, for example, 0, 1, 2, or 3 bits.
  • the bit width of the BWP indicator field is, for example, 0, 1, 2, Or it may be 3 bits. That is, the bit width of the BWP indicator field in the addition of one BWP may be newly defined with respect to the bit width in 3GPP Release 15-17 (legacy bit width).
  • bit width of the BWP indicator field is shown below.
  • n BWP parameter set by upper layer signaling
  • the BWP indicator is equivalent to the ascending order of the upper layer parameter “BWP-Id”.
  • bit width of the BWP indicator field is defined, for example, as shown in FIG. 15.
  • the common BWP may be the default BWP.
  • the default BWPs of each terminal are aligned in frequency and have the same bandwidth.
  • each terminal is set with a default BWP that is frequency aligned and has the same bandwidth.
  • the common BWP may be configured with the DL default BWP and/or the UL default BWP.
  • the DL default BWP may be set, for example, by defaultDownlinkBWP-Id.
  • the UL default BWP may be configured by introducing a new parameter, eg defaultUplinkBWP-Id.
  • the terminal falls back to the default BWP for NW ES, i.e. common BWP, when the timer expires.
  • the timer may be, for example, an existing fallback timer. Also, a new timer for the NW ES may be used (or may be set).
  • Option 5 describes a mechanism that enables bandwidth adaptation within BWP without switching between BWPs. According to such a configuration, it is possible to suppress the power consumption of the base station 10 while suppressing the bandwidth adaptation latency.
  • the terminal 20 receives specific downlink control information (specific DCI) used in network energy saving (NW Energy Saving), and controls the bandwidth within a specific bandwidth portion (specific BWP) based on the received specific DCI. Perform adaptation.
  • specific DCI specific downlink control information
  • NW Energy Saving network energy saving
  • specific BWP specific bandwidth portion
  • the following options are possible for the information (indication) included in the specific DCI.
  • the specific DCI includes information (Field) that specifies the frequency resource to be activated within the specific BWP.
  • the specific DCI includes information (Field) that specifies the frequency resource to be deactivated within the specific BWP.
  • the following options are possible as the specific granularity of frequency resources to be activated or deactivated within a specific BWP by a specific DCI.
  • the specific granularity may be in RBG (Resource Block Group) units.
  • RBG is a group of RBs (Resource Blocks).
  • the number of RBs in a group may be set by upper layer parameters or may be predefined in the wireless communication system.
  • one RBG may be composed of eight RBs. In such a case, 8 may be set by upper layer parameters.
  • the specific granularity may be in RB units.
  • the specific granularity may be in RE units.
  • the specific granularity may be a ratio to a specific BWP, or may be the number of divisions of a specific BWP.
  • the number of divisions may be expressed as 2, 4, X.
  • the ratio may be expressed as 1/2, 1/4, 1/X.
  • the specific DCI may include a field that specifies frequency resources to be activated or deactivated within a specific BWP.
  • the options listed below are possible as fields.
  • the fields included in the specific DCI may include a field that directly specifies the number of specific granules, with each specific granularity as one unit.
  • the specific DCI may include a field that specifies the number of RBGs. For example, if 2 is specified as the number of RBGs by the specific DCI, two RBGs are activated or deactivated within the specific BWP. RBGs to be activated or deactivated may be specified in ascending order of RB Index within a specific BWP, may be specified in descending order of RB Index within a specific BWP, and may be set by upper layer parameters, It may be predefined in the wireless communication system.
  • the specific DCI may include a field that specifies the number of RBs. For example, if 20 is specified as the number of RBs by a specific DCI, 20 RBs are activated or deactivated within the specific BWP. RBs to be activated or deactivated may be specified in ascending order of RB Index within a specific BWP, may be specified in descending order of RB Index within a specific BWP, and may be set by upper layer parameters, It may be predefined in the wireless communication system.
  • the specific DCI may include a field that specifies the number of REs. For example, if 100 is specified as the number of REs by a specific DCI, 100 REs are activated or deactivated within the specific BWP. REs to be activated or deactivated may be specified in ascending order of RB Index within a specific BWP, may be specified in descending order of RB Index within a specific BWP, and may be set by upper layer parameters, It may be predefined in the wireless communication system.
  • the specific DCI may include a field that specifies the ratio to the specific BWP or the number of divisions of the specific BWP. For example, if 2 is specified by the specific DCI as the number of divisions of the specific BWP, half of the frequency resources are activated or deactivated within the specific BWP. Frequency resources to be activated or deactivated may be specified in ascending order of RB Index within a specific BWP, may be specified in descending order of RB Index within a specific BWP, or may be configured by upper layer parameters. , may be predefined in the wireless communication system.
  • the fields included in the specific DCI include a field that specifies a frequency resource from among one or more configured candidates.
  • One or more candidates may be set by upper layer parameters.
  • 10, 20, 40, 80 RBGs may be set as candidates for the number of RBGs.
  • the frequency resource may be specified from among these candidates by a 2-bit field included in the specific DCI.
  • possible values of the field may be “01”, “01”, “10”, and “11”, which correspond to 10, 20, 40, and 80 RBGs, respectively.
  • the size of the field may be determined by the maximum number of candidates that can be set. Therefore, the field size may be 1 bit or 3 bits or more.
  • 2, 4, 8, 16 may be set as candidates for the number of divisions.
  • the frequency resource may be specified from among these candidates by a 2-bit field included in the specific DCI.
  • the possible values of the field are “01”, “01”, “10” corresponding to 2, 4, 8, 16 (i.e. 1/2, 1/4, 1/8, 1/16) respectively. ”, “11”.
  • the size of the field may be determined by the maximum number of candidates that can be set. Therefore, the field size may be 1 bit or 3 bits or more.
  • the terminal 20 may perform the operations described below in response to receiving the specific DCI.
  • the base station 10 and the terminal 20 assume that the base station 10 and the terminal 20 receive the DL channel in the frequency resource specified by the specific DCI in the specific BWP, and receive the DL channel in the frequency resource specified by the specific DCI. There is no need to assume that it will be received. Similarly, in a specific BWP, the base station 10 and the terminal 20 assume reception of UL channels on frequency resources specified by a specific DCI, and do not assume reception of UL channels on frequency resources other than those specified by the specific DCI. It's okay.
  • the base station 10 and the terminal 20 do not assume reception of DL channels on the frequency resources specified by the specific DCI in a specific BWP, but instead use DL channels on frequency resources other than those specified by the specific DCI. It may be assumed that the channel is received. Similarly, in a specific BWP, the base station 10 and the terminal 20 do not assume reception of UL channels in the frequency resources specified by the specific DCI, but instead assume reception of UL channels in frequency resources other than those specified by the specific DCI. You may.
  • the base station 10 and the terminal 20 assume communication on the DL channel in the frequency resource activated by the specific DCI in the specific BWP set in the terminal 20, and perform DL channel communication in the frequency resource inactivated by the specific DCI. It is not necessary to assume channel communication.
  • the base station 10 and the terminal 20 assume communication on the UL channel in the frequency resource activated by the specific DCI in the specific BWP set in the terminal 20, and in the frequency resource inactivated by the specific DCI. There is no need to assume UL channel communication.
  • the format of the specific DCI may be UE-specific DCI format or group-common DCI format.
  • the specific DCI format may be an existing format (for example, DCI format 1_1/1_2/2_0) or a newly introduced format (for example, DCI format 2_x).
  • the RNTI used for DCI CRC scrambling may be an existing RNTI (e.g. C-RNTI, SFI-RNTI) or a newly introduced RNTI for NW energy saving (e.g. ES-RNTI). Good too.
  • the specific BWP may be an active BWP or may be another BWP other than the active BWP. If the specific BWP is an active BWP, there is no need for explicit indication as to which BWP the specific DCI is applied to. On the other hand, if the specific BWP is a BWP other than the active BWP, explicit indication is required as to which BWP the specific DCI is applied. Regarding which BWP a specific DCI is applied, it may be set by upper layer parameters, or may be notified by the DCI. The specific BWP may be considered to be the BWP set in the terminal 20.
  • option 5 which option is applied may be determined based on one or more elements selected from RRC settings, MAC CE, DCI, UCI, and UE capability.
  • UE capability may include an information element indicating whether the terminal 20 supports bandwidth adaptation within a specific BWP.
  • UE capability may include an information element indicating which options the terminal 20 supports or not.
  • Each of the above options and/or each Alt. may be applied in combination.
  • the BWP Id of the common BWP is notified to the terminal in upper layer signaling such as RRC.
  • the terminal When the terminal is notified by the DCI of an instruction to switch to the common BWP, the terminal switches the BWP to the common BWP.
  • each option and each Alt. supported may be one or more.
  • the terminal may report the following terminal capabilities to the base station as UE capabilities. ⁇ Whether to support common BWP for NW ES
  • FIG. 16 is a block diagram showing an example of the configuration of base station 10 according to the embodiment.
  • Base station 10 includes, for example, a transmitter 101, a receiver 102, and a controller 103.
  • the base station 10 communicates wirelessly with the terminal 20 (see FIG. 17).
  • the transmitter 101 transmits a downlink (DL) signal to the terminal 20.
  • DL downlink
  • the transmitter 101 transmits a DL signal under the control of the controller 103.
  • the DL signal may include, for example, a downlink data signal and control information (for example, Downlink Control Information (DCI)). Further, the DL signal may include information indicating scheduling regarding signal transmission by the terminal 20 (for example, UL grant). Further, the DL signal may include upper layer control information (for example, Radio Resource Control (RRC) control information). Further, the DL signal may include a reference signal.
  • DCI Downlink Control Information
  • RRC Radio Resource Control
  • RRC Radio Resource Control
  • Channels used for transmitting DL signals include, for example, data channels and control channels.
  • the data channel may include a PDSCH (Physical Downlink Shared Channel)
  • the control channel may include a PDCCH (Physical Downlink Control Channel).
  • the base station 10 transmits control information to the terminal 20 using the PDCCH, and transmits a downlink data signal using the PDSCH.
  • Reference signals included in DL signals include, for example, demodulation reference signal (DMRS), Phase Tracking Reference Signal (PTRS), Channel State Information-Reference Signal (CSI-RS), and Sounding Reference Signal (SRS). ), and a Positioning Reference Signal (PRS) for location information.
  • DMRS demodulation reference signal
  • PTRS Phase Tracking Reference Signal
  • CSI-RS Channel State Information-Reference Signal
  • SRS Sounding Reference Signal
  • PRS Positioning Reference Signal
  • reference signals such as DMRS and PTRS are used for demodulating downlink data signals and are transmitted using PDSCH.
  • the receiving unit 102 receives an uplink (UL) signal transmitted from the terminal 20.
  • the receiving unit 102 receives the UL signal under the control of the control unit 103.
  • the control unit 103 controls the communication operation of the base station 10, including the transmission processing of the transmission unit 101 and the reception processing of the reception unit 102.
  • control unit 103 acquires information such as data and control information from an upper layer and outputs it to the transmission unit 101. Furthermore, the control unit 103 outputs the data, control information, etc. received from the reception unit 102 to the upper layer.
  • control unit 103 determines the resources (or channels) used for transmitting and receiving DL signals based on the signal (for example, data and control information, etc.) received from the terminal 20 and/or the data and control information obtained from the upper layer. and/or allocate resources used for transmitting and receiving UL signals. Information regarding the allocated resources may be included in the control information transmitted to the terminal 20.
  • the control unit 103 sets PUCCH resources as an example of resource allocation used for transmitting and receiving UL signals.
  • Information regarding the PUCCH configuration such as the PUCCH cell timing pattern may be notified to the terminal 20 by RRC.
  • the control unit 103 determines to transmit a signal instructing multiple terminals to switch to a common bandwidth portion. Transmitting section 101 transmits the signal determined by control section 103.
  • the signal indicating switching to the common bandwidth portion may be DCI.
  • the common bandwidth portion for multiple terminals is a common BWP.
  • the control unit 103 notifies the common BWP using cell-specific parameters or terminal-specific parameters.
  • the common BWP may be signaled by a new parameter such as "EnergySavingBWP" included in “ServingCellConfigCommon” and/or “DownlinkConfigCommon” and/or "UplinkConfigCommon”.
  • the common BWP may be signaled by a new parameter such as "EnergySavingBWP” included in "ServingCellConfig” and/or “DownlinkConfig” and/or "UplinkConfig".
  • FIG. 17 is a block diagram showing an example of the configuration of the terminal 20 according to the embodiment.
  • Terminal 20 includes, for example, a receiving section 201, a transmitting section 202, and a control section 203.
  • the terminal 20 communicates with the base station 10 wirelessly, for example.
  • the receiving unit 201 receives the DL signal transmitted from the base station 10. For example, receiving section 201 receives a DL signal under the control of control section 203.
  • the transmitter 202 transmits the UL signal to the base station 10. For example, the transmitter 202 transmits a UL signal under the control of the controller 203.
  • the UL signal may include, for example, an uplink data signal and control information (for example, UCI).
  • control information for example, UCI
  • information regarding the processing capability of the terminal 20 eg, UE capability
  • the UL signal may include a reference signal.
  • Channels used for transmitting UL signals include, for example, data channels and control channels.
  • the data channel includes PUSCH (Physical Uplink Shared Channel)
  • the control channel includes PUCCH (Physical Uplink Control Channel).
  • the terminal 20 receives control information from the base station 10 using the PU CCH, and transmits an uplink data signal using the PUSCH.
  • the reference signal included in the UL signal may include, for example, at least one of DMRS, PTRS, CSI-RS, SRS, and PRS.
  • reference signals such as DMRS and PTRS are used for demodulating uplink data signals and are transmitted using an uplink channel (for example, PUSCH).
  • the control unit 203 controls communication operations of the terminal 20, including reception processing in the reception unit 201 and transmission processing in the transmission unit 202.
  • control unit 203 acquires information such as data and control information from an upper layer and outputs it to the transmission unit 202. Further, the control unit 203 outputs, for example, data and control information received from the reception unit 201 to an upper layer.
  • control unit 203 controls the transmission of information to be fed back to the base station 10.
  • the information fed back to the base station 10 may include, for example, HARQ-ACK, channel state information (CSI), or scheduling request (SR). good.
  • Information fed back to the base station 10 may be included in the UCI.
  • the UCI is transmitted on the PUCCH resource.
  • the control unit 203 configures PUCCH resources based on configuration information received from the base station 10 (for example, configuration information such as a PUCCH cell timing pattern and/or DCI notified by RRC). Control section 203 determines PUCCH resources to be used for transmitting information to be fed back to base station 10. Under the control of control section 203, transmitting section 202 transmits information to be fed back to base station 10 in the PUCCH resource determined by control section 203.
  • channels used for transmitting DL signals and the channels used for transmitting UL signals are not limited to the examples described above.
  • channels used for transmitting DL signals and channels used for transmitting UL signals may include RACH (Random Access Channel) and PBCH (Physical Broadcast Channel).
  • RACH may be used, for example, to transmit Downlink Control Information (DCI) including Random Access Radio Network Temporary Identifier (RA-RNTI).
  • DCI Downlink Control Information
  • RA-RNTI Random Access Radio Network Temporary Identifier
  • the receiving unit 201 receives a signal instructing BWP switching.
  • the signal instructing BWP switching may be DCI.
  • the control unit 203 determines switching to the BWP common to other terminals based on the signal or timer received by the reception unit 201.
  • a BWP that is common to other terminals is a common BWP.
  • the common BWP may be set for each cell or for each terminal.
  • the common BWP may be configured by introducing a new parameter such as defaultUplinkBWP-Id.
  • each functional block may be realized using one physically or logically coupled device, or may be realized using two or more physically or logically separated devices directly or indirectly (e.g. , wired, wireless, etc.) and may be realized using a plurality of these devices.
  • the functional block may be realized by combining software with the one device or the plurality of devices.
  • Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, exploration, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, These include, but are not limited to, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning. I can't do it.
  • a functional block (configuration unit) that performs transmission is called a transmitting unit or a transmitter. In either case, as described above, the implementation method is not particularly limited.
  • a base station, a terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure.
  • FIG. 18 is a diagram illustrating an example of the hardware configuration of a base station and a terminal according to the embodiment.
  • the base station 10 and terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.
  • the word “apparatus” can be read as a circuit, a device, a unit, etc.
  • the hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured not to include some of the devices.
  • Each function in the base station 10 and the terminal 20 is performed by loading predetermined software (programs) onto hardware such as the processor 1001 and memory 1002, so that the processor 1001 performs calculations and controls communication by the communication device 1004. This is realized by controlling at least one of reading and writing data in the memory 1002 and storage 1003.
  • the processor 1001 for example, operates an operating system to control the entire computer.
  • the processor 1001 may be configured by a central processing unit (CPU) that includes interfaces with peripheral devices, a control device, an arithmetic unit, registers, and the like.
  • CPU central processing unit
  • control unit 103, control unit 203, etc. may be realized by the processor 1001.
  • 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 these.
  • 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 control unit 203 of the terminal 20 may be realized by a control program stored in the memory 1002 and operated on the processor 1001, and other functional blocks may be realized in the same way.
  • Processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via a telecommunications line.
  • the memory 1002 is a computer-readable recording medium, such as at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. It may be configured by Memory 1002 may be called a register, cache, main memory, or the like.
  • the memory 1002 can store executable programs (program codes), software modules, and the like to implement a wireless communication method according to an embodiment of the present disclosure.
  • the storage 1003 is a computer-readable recording medium, such as an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (such as a compact disk, a digital versatile disk, or a Blu-ray disk). (registered trademark disk), smart card, flash memory (eg, card, stick, key drive), floppy disk, magnetic strip, etc.
  • Storage 1003 may also be called auxiliary storage.
  • the storage medium mentioned above may be, for example, a database including at least one of memory 1002 and storage 1003, a server, or other suitable medium.
  • the communication device 1004 is hardware (transmission/reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, network controller, network card, communication module, etc.
  • the communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). It may be composed of.
  • FDD frequency division duplex
  • TDD time division duplex
  • the above-mentioned transmitting section 101, receiving section 102, receiving section 201, transmitting section 202, etc. may be realized by the communication device 1004.
  • the input device 1005 is an input device (eg, keyboard, mouse, microphone, switch, button, sensor, etc.) that accepts input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside. Note that the input device 1005 and the output device 1006 may have an integrated configuration (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 for each device.
  • the base station 10 and the terminal 20 are equipped with hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (F PGA). It may be configured to include hardware, and a part or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented using at least one of these hardwares.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • PLD programmable logic device
  • F PGA field programmable gate array
  • Information notification may be performed using physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling). , broadcast information (MIB (Master Information Block), SIB (System Information Block))), other signals, or a combination thereof.
  • RRC signaling may be called an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.
  • ⁇ Applicable system> The embodiments described in this disclosure apply to LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), and 5G (5th generation mobile communication system).
  • WiMAX registered trademark
  • IEEE 802.20 IEEE 802.20
  • UWB Ultra-WideBand
  • Bluetooth registered trademark
  • other appropriate systems and systems that are extended, modified, created, or defined based on these. It may be applied to at least one next generation system.
  • a combination of a plurality of systems for example, a combination of at least one of LTE and LTE-A and 5G may be applied.
  • ⁇ Base station operation> The specific operations performed by the base station in this disclosure may be performed by its upper node in some cases.
  • various operations performed for communication with a terminal are performed by the base station and other network nodes other than the base station (e.g., MME or It is clear that this could be done by at least one of the following: S-GW, etc.).
  • MME Mobility Management Entity
  • S-GW Serving GW
  • there is one network node other than the base station but it may be a combination of multiple other network nodes (for example, MME and S-GW).
  • ⁇ Input/output direction> Information etc. can be output from an upper layer (or lower layer) to a lower layer (or upper layer). It may be input/output via multiple network nodes.
  • the input/output information may be stored in a specific location (eg, memory) or may be managed using a management table. Information etc. to be input/output may be overwritten, updated, or additionally written. The output information etc. may be deleted. The input information etc. may be transmitted to other devices.
  • Judgment may be made using a value expressed by 1 bit (0 or 1), a truth value (Boolean: true or false), or a comparison of numerical values (for example, a predetermined value). (comparison with a value).
  • Software includes instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name. , should be broadly construed to mean an application, software application, software package, routine, subroutine, object, executable, thread of execution, procedure, function, etc.
  • software, instructions, information, etc. may be sent and received via a transmission medium.
  • a transmission medium such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.
  • wired technology such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.
  • wireless technology such as infrared, microwave
  • the information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies.
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. which may be referred to throughout the above description, may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may also be represented by a combination of
  • At least one of the channel and the symbol may be a signal.
  • the signal may be a message.
  • a component carrier may be called a carrier frequency, a cell, a frequency carrier, or the like.
  • the information, parameters, etc. described in this disclosure may be expressed using absolute values, relative values from a predetermined value, or using other corresponding information. may be expressed.
  • radio resources may be indicated by an index.
  • Base station BS
  • base station wireless base station
  • fixedstation NodeB
  • gNodeB(gNB) nodeB
  • a base station is sometimes referred to by terms such as macrocell, small cell, femtocell, and picocell.
  • a base station can accommodate one or more (eg, three) cells. If a base station accommodates multiple cells, the overall coverage area of the base station can be partitioned into multiple smaller areas, and each smaller area is divided into multiple subsystems (e.g., small indoor base stations (RRHs)).
  • RRHs small indoor base stations
  • the term "cell” or “sector” refers to part or all of the coverage area of a base station and/or base station subsystem that provides communication services in this coverage area. refers to
  • MS Mobile Station
  • UE User Equipment
  • a mobile station is defined by a person 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 referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.
  • At least one of a base station and a mobile station may be called a transmitting device, a receiving device, a communication device, or the like.
  • the base station and the mobile station may be a device mounted on a mobile body, the mobile body itself, or the like.
  • the moving body refers to a movable object, and the moving speed is arbitrary. Naturally, this also includes cases where the moving object is stopped. Examples of such moving objects include vehicles, transportation vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, carts, rickshaws, and ships and other watercraft.
  • the mobile object may be a mobile object that autonomously travels based on a travel command. It may be a vehicle (e.g. car, airplane, etc.), an unmanned moving object (e.g. drone, self-driving car, etc.), or a robot (manned or unmanned). good.
  • 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 the mobile station may be an IoT (Internet of Things) device such as a sensor.
  • IoT Internet of Things
  • the base station in the present disclosure may be replaced by a terminal.
  • a terminal For example, regarding a configuration in which communication between a base station and a terminal is replaced with communication between multiple terminals (for example, it may be called D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.) , embodiments of the present disclosure may be applied.
  • the terminal 20 may have the functions that the base station 10 described above 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 replaced with side channels.
  • a terminal in the present disclosure may be replaced by a base station.
  • the base station 10 may have the functions that the terminal 20 described above has.
  • FIG. 19 shows an example of the configuration of the 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, a front wheel 2007, a rear wheel 2008, an axle 2009, an electronic control unit 2010, and various sensors 2021 to 2029. , an information service section 2012 and a communication module 2013.
  • Each aspect/embodiment described in this disclosure may be applied to a communication device mounted on vehicle 2001, for example, may be applied to communication module 2013.
  • the drive unit 2002 is composed of, for example, an engine, a motor, or a hybrid of an engine and a 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 the rear wheels based on the operation of the steering wheel operated by the user.
  • the electronic control unit 2010 is composed of a microprocessor 2031, memory (ROM, RAM) 2032, and communication port (IO port) 2033. Signals from various sensors 2021 to 2029 provided in the vehicle 2001 are input to the electronic control unit 2010.
  • the electronic control unit 2010 may also be called an ECU (Electronic Control Unit).
  • Signals from various sensors 2021 to 2029 include current signals from current sensor 2021 that senses motor current, front and rear wheel rotation speed signals obtained by rotation speed sensor 2022, and front wheel rotation speed signals obtained by air pressure sensor 2023. and rear wheel air pressure signal, vehicle speed signal acquired by vehicle speed sensor 2024, acceleration signal acquired by acceleration sensor 2025, accelerator pedal depression amount signal acquired by accelerator pedal sensor 2029, and brake pedal sensor 2026. These include 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.
  • the Information Service Department 2012 provides various devices such as car navigation systems, audio systems, speakers, televisions, and radios that provide (output) various information such as driving information, traffic information, and entertainment information, and controls these devices. Consists of one or more ECUs.
  • the information service unit 2012 provides various multimedia information and multimedia services to the occupants of the vehicle 2001 using information acquired from an external device via the communication module 2013 and the like.
  • the information service unit 12 may include an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) that accepts input from the outside, and an output device (for example, (displays, speakers, LED lamps, touch panels, etc.).
  • an input device for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.
  • an output device for example, (displays, speakers, LED lamps, touch panels, etc.).
  • the driving support system unit 2030 includes millimeter wave radar, LiDAR (Light Detection and Ranging), cameras, positioning locators (e.g. GNSS, etc.), map information (e.g. high definition (HD) maps, autonomous vehicle (AV) maps, etc.) ), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, and AI processors that prevent accidents and reduce the driver's driving burden. It consists of various devices that provide functions for the purpose and one or more ECUs that control these devices. Further, 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.
  • GPS Light Detection and Ranging
  • map information e.g. high definition (HD) maps, autonomous vehicle (AV) maps, etc.
  • gyro systems e.g., IMU (Inertial Measurement Unit), INS (Iner
  • Communication module 2013 can communicate with microprocessor 2031 and components of vehicle 2001 via a communication port.
  • the communication module 2013 communicates with the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, electronic Data is transmitted and received between the microprocessor 2031, memory (ROM, RAM) 2032, and sensors 2021 to 29 in the control unit 2010.
  • 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 external devices. For example, various information is transmitted and received with an external device via wireless communication.
  • Communication module 2013 may be located either inside or outside electronic control unit 2010.
  • the external device may be, for example, a base station, a mobile station, or the like.
  • the communication module 2013 receives signals from the various sensors 2021 to 2029 described above that are input to the electronic control unit 2010, information obtained based on the signals, and input from the outside (user) obtained via the information service unit 2012. At least one of the information based on the information may be transmitted to an external device via wireless communication.
  • the electronic control unit 2010, various sensors 2021 to 2029, information service unit 2012, etc. may be called an input unit that receives input.
  • the PUSCH transmitted by the communication module 2013 may include information based on the above input.
  • 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 section 2012 provided in the vehicle 2001.
  • the information service unit 2012 is an output unit that outputs information (for example, outputs information to devices such as a display and a speaker based on the PDSCH (or data/information decoded from the PDSCH) received by the communication module 2013). may be called.
  • the communication module 2013 also stores various information received from external devices into a memory 2032 that can be used by the microprocessor 2031. Based on the information stored in the memory 2032, the microprocessor 2031 controls the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheel 2007, rear wheel 2008, and axle 2009 provided in the vehicle 2001. , sensors 2021 to 2029, etc. may be controlled.
  • determining may encompass a wide variety of operations.
  • “Judgment” and “decision” include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, search, and inquiry. (e.g., searching in a table, database, or other data structure), and regarding an ascertaining as a “judgment” or “decision.”
  • judgment and “decision” refer to receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, and access.
  • (accessing) may include considering something as a “judgment” or “decision.”
  • judgment and “decision” refer to resolving, selecting, choosing, establishing, comparing, etc. as “judgment” and “decision”. may be included.
  • judgment and “decision” may include regarding some action as having been “judged” or “determined.”
  • judgment (decision) may be read as "assuming", “expecting", “considering”, etc.
  • connection means any connection or coupling, direct or indirect, between two or more elements and each other. It can include the presence of one or more intermediate elements between two elements that are “connected” or “coupled.”
  • the bonds or connections between elements may be physical, logical, or a combination thereof. For example, "connection” may be replaced with "access.”
  • two elements include one or more electrical wires, cables, and/or printed electrical connections, as well as in the radio frequency domain, as some non-limiting and non-inclusive examples. , electromagnetic energy having wavelengths in the microwave and optical (both visible and non-visible) ranges.
  • the reference signal can also be abbreviated as RS (Reference Signal), and may also be called a pilot depending on the applied standard.
  • any reference to elements using the designations "first,””second,” etc. does not generally limit the amount or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Thus, reference to a first and second element does not imply that only two elements may be employed or that the first element must precede the second element in any way.
  • a radio frame may be composed of one or more frames in the time domain. Each frame or frames in the time domain may be called a subframe. A subframe may also be composed of one or more slots in the time domain. A subframe may have a fixed time length (eg, 1 ms) that does not depend on numerology.
  • the numerology may be a communication parameter applied to the transmission and/or reception of a certain signal or channel. Numerology includes, for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, transmission and reception. It may also indicate at least one of a specific filtering process performed by the device in the frequency domain, a specific windowing process performed by the transceiver in the time domain, etc.
  • SCS subcarrier spacing
  • TTI transmission time interval
  • the numerology may also indicate at least one of a specific filtering process performed by the device in the frequency domain, a specific windowing process performed by the transceiver in the time domain, etc.
  • a slot may be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.) in the time domain.
  • a slot may be a unit of time based on numerology.
  • a slot may include multiple mini-slots. Each minislot may be composed of one or more symbols in the time domain. Furthermore, a mini-slot may also be called a sub-slot. A minislot may be made up of fewer symbols than a slot.
  • PDSCH (or PUSCH) transmitted in time units larger than minislots may be referred to as PDSCH (or PUSCH) mapping type A.
  • PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (or PU SCH) mapping type B.
  • Radio frames, subframes, slots, minislots, and symbols all represent time units when transmitting signals. Other names may be used for the radio frame, subframe, slot, minislot, and symbol.
  • 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 minislot may be called a TTI. It's okay.
  • at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (for example, 1-13 symbols), or a period longer than 1ms. It may be.
  • the unit representing TTI may be called a slot, minislot, etc. instead of a subframe.
  • TTI refers to, for example, the minimum time unit for scheduling 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
  • TTI is not limited to this.
  • the TTI may be a unit of transmission time such as a channel-coded data packet (transport block), a code block, or a codeword, or may be a unit of processing such as scheduling or link adaptation. Note that when a TTI is given, the time interval (for example, the number of symbols) to which transport blocks, code blocks, code words, 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 time unit for scheduling.
  • the number of slots (minislot number) that constitutes 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 the normal TTI may be referred to as a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.
  • long TTI e.g., normal TTI, subframe, etc.
  • short TTI e.g., shortened TTI, etc.
  • TTI with a time length of less than the long TTI and 1ms. It may also be read as a TTI having a TTI length of the above length.
  • a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more continuous subcarriers in the frequency domain.
  • the number of subcarriers included in an RB may be the same regardless of the newerology, and may be 12, for example.
  • the number of subcarriers included in an RB may be determined based on newerology.
  • the time domain of an RB may include one or more symbols, and may be one slot, one minislot, one subframe, or one TTI in length.
  • One TTI, one subframe, etc. may each be composed of one or more resource blocks.
  • one or more RBs can be classified into physical resource blocks (PRBs), sub-carrier groups (SCGs), resource element groups (REGs), PRB pairs, RB pairs, etc. May be called.
  • PRBs physical resource blocks
  • SCGs sub-carrier groups
  • REGs resource element groups
  • PRB pairs RB pairs, etc. May be called.
  • a resource block may be composed of one or more resource elements (REs).
  • 1RE may be a radio resource region of 1 subcarrier and 1 symbol.
  • Bandwidth Part (also called partial bandwidth) refers to a subset of consecutive common resource blocks (RB) for a certain numerology in a certain carrier.
  • the common RB may be specified by an RB index based on a 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 within 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 of the active BWP.
  • “cell”, “carrier”, etc. in the present disclosure may be replaced with “BWP”.
  • radio frames, subframes, slots, minislots, symbols, etc. described above are merely 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 symbols included in an RB, Configurations such as the number of subcarriers, the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.
  • the "maximum transmit power” described in this disclosure may mean the maximum value of transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power ( It may also mean the rated UE maximum transmit power.

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

Abstract

Ce terminal comprend une unité de réception qui reçoit des informations de commande de liaison descendante spécifiques utilisées pour économiser de l'énergie dans un réseau, et une unité de commande qui exécute une adaptation de largeur de bande dans une partie de largeur de bande spécifique sur la base des informations de commande de liaison descendante spécifiques.
PCT/JP2023/030450 2022-08-24 2023-08-24 Terminal, station de base et procédé de communication WO2024043295A1 (fr)

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Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
LG ELECTRONICS: "Discussion on physical layer techniques for network energy savings", 3GPP DRAFT; R1-2207038, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Toulouse, France; 20220822 - 20220826, 12 August 2022 (2022-08-12), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052274976 *
SAMSUNG: "Uplink signal and channel design for NR-U", 3GPP DRAFT; R1-2002116, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. e-Meeting; 20200420 - 20200430, 10 April 2020 (2020-04-10), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051873430 *

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