WO2024069907A1 - 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
WO2024069907A1
WO2024069907A1 PCT/JP2022/036612 JP2022036612W WO2024069907A1 WO 2024069907 A1 WO2024069907 A1 WO 2024069907A1 JP 2022036612 W JP2022036612 W JP 2022036612W WO 2024069907 A1 WO2024069907 A1 WO 2024069907A1
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WIPO (PCT)
Prior art keywords
terminal
base station
information
monitoring
wus
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PCT/JP2022/036612
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English (en)
Japanese (ja)
Inventor
拓真 中村
大樹 武田
慎也 熊谷
大輔 栗田
知也 小原
Original Assignee
株式会社Ｎｔｔドコモ
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Application filed by 株式会社Ｎｔｔドコモ filed Critical 株式会社Ｎｔｔドコモ
Priority to PCT/JP2022/036612 priority Critical patent/WO2024069907A1/fr
Publication of WO2024069907A1 publication Critical patent/WO2024069907A1/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
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H04W8/24—Transfer of terminal data
    • 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 invention relates to a terminal, a base station, and a communication method in a wireless communication system.
  • Non-Patent Document 1 For NR (New Radio) (also known as “5G”), the successor system to LTE (Long Term Evolution), technologies are being considered that meet the requirements of a large-capacity system, high data transmission speed, low latency, simultaneous connection of many terminals, low cost, and low power consumption (for example, Non-Patent Document 1).
  • WURs Wike up receivers
  • the present invention has been made in consideration of the above points, and aims to provide technology that enables a terminal capable of operating in a low-power state to operate properly.
  • a receiving unit that monitors a specific signal transmitted from a base station in a low power state; and a control unit that switches between an operation of constantly monitoring the specific signal and an operation of periodically monitoring the specific signal based on an instruction from the base station.
  • the disclosed technology provides a technology that enables a terminal capable of operating in a low-power state to operate properly.
  • FIG. 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention.
  • 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention.
  • FIG. 13 is a diagram showing an operation of monitoring a PO.
  • FIG. 13 is a diagram showing an operation when the PO is not monitored.
  • FIG. 13 is a diagram for explaining an example of operation when using WUR.
  • FIG. 11 is a diagram illustrating an example of a state transition.
  • FIG. 11 is a diagram illustrating an example of a state transition.
  • FIG. 11 is a diagram illustrating an example of a monitoring operation.
  • FIG. 11 is a diagram illustrating an example of a monitoring operation.
  • FIG. 11 is a diagram illustrating an example of an operation sequence.
  • FIG. 11 is a diagram illustrating an example of an operation sequence.
  • FIG. 11 is a diagram illustrating an example of a monitoring operation.
  • FIG. 11 is a diagram illustrating a terminal operation during a state transition.
  • FIG. 11 is a diagram illustrating a terminal operation during a state transition.
  • FIG. 11 is a diagram illustrating a terminal operation during a state transition.
  • FIG. 13 is a diagram showing an example of a 4-step RACH.
  • FIG. 2 illustrates an example of RACH operation.
  • FIG. 2 is a diagram illustrating an example of a two-step RACH.
  • FIG. 2 illustrates an example of RACH operation.
  • FIG. 2 is a diagram illustrating an example of the configuration of a base station 10.
  • FIG. 2 is a diagram illustrating an example of the configuration of a terminal 20.
  • FIG. 13 is a diagram illustrating a configuration example in which the WUR is explicitly shown.
  • 2 is a diagram illustrating an example of a hardware configuration of a base station 10 or a terminal 20 according to an embodiment of the present invention.
  • FIG. 1 is a diagram illustrating an example of the configuration of a vehicle.
  • existing technologies are used as appropriate.
  • the existing technologies are, for example, existing LTE or existing NR, but are not limited to existing LTE and NR.
  • the duplex method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or another method (e.g., Flexible Duplex, etc.).
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • another method e.g., Flexible Duplex, etc.
  • "configuring" wireless parameters and the like may mean that a predetermined value is pre-configured, or that wireless parameters notified from the base station 10 or the terminal 20 are set.
  • FIG. 1 is a diagram showing a configuration example (1) of a wireless communication system in an embodiment of the present invention.
  • the wireless communication system in the embodiment of the present invention includes a base station 10 and a terminal 20.
  • FIG. 1 shows one base station 10 and one terminal 20, this is an example, and there may be multiple 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 wireless signal are defined in the time domain and the 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 the number of resource blocks.
  • the base station 10 transmits a synchronization signal and system information to the terminal 20.
  • the synchronization signal is, for example, NR-PSS and NR-SSS.
  • the system information is, for example, transmitted by NR-PBCH and is also called broadcast information.
  • the synchronization signal and system information may be called SSB (SS/PBCH block).
  • the SSB may be called a synchronization signal or a synchronization signal block.
  • the base station 10 transmits a control signal or data to the terminal 20 in DL (Downlink) and receives a control signal or data from the terminal 20 in UL (Uplink).
  • Both the base station 10 and the terminal 20 are capable of transmitting and receiving signals by performing beamforming.
  • both the base station 10 and the terminal 20 can apply MIMO (Multiple Input Multiple Output) communication to DL or UL.
  • both the base station 10 and the terminal 20 may communicate via a secondary cell (SCell: Secondary Cell) and a primary cell (PCell: Primary Cell) using CA (Carrier Aggregation).
  • the terminal 20 may communicate via a primary cell of the base station 10 and a primary secondary cell group cell (PSCell: Primary SCG Cell) of another base station 10 using DC (Dual Connectivity).
  • SCell Secondary Cell
  • PCell Primary Cell
  • CA Carrier Aggregation
  • 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, an IoT terminal, or a communication module for M2M (Machine-to-Machine). As shown in FIG. 1, the terminal 20 receives control signals or data from the base station 10 in DL and transmits control signals or data to the base station 10 in UL, thereby utilizing various communication services provided by the wireless communication system. The terminal 20 also receives various reference signals transmitted from the base station 10, and performs measurement of the propagation path quality based on the reception results of the reference signals.
  • a wireless communication function such as a smartphone, a mobile phone, a tablet, a wearable terminal, an IoT terminal, or a communication module for M2M (Machine-to-Machine).
  • M2M Machine-to-Machine
  • the terminal 20 is capable of performing carrier aggregation, which bundles multiple cells (multiple CCs (Component Carriers)) together to communicate with the base station 10.
  • carrier aggregation one PCell (Primary cell) and one or more SCells (Secondary cells) are used.
  • a PUCCH-SCell having a PUCCH may also be used.
  • FIG. 2 is a diagram for explaining an example (2) of a wireless communication system in an embodiment of the present invention.
  • FIG. 2 shows an example of the configuration of a wireless communication system when DC (Dual connectivity) is implemented.
  • a base station 10A serving as a MN (Master Node) and a base station 10B serving as a SN (Secondary Node) are provided.
  • Base station 10A and base station 10B are each connected to a core network.
  • Terminal 20 can communicate with both base station 10A and base station 10B.
  • the cell group provided by base station 10A which is an MN
  • the MCG Master Cell Group
  • the cell group provided by base station 10B which is an SN
  • the SCG Secondary Cell Group
  • the MCG is composed of one PCell and one or more SCells
  • the SCG is composed of one PSCell (Primary SCG Cell) and one or more SCells.
  • processing operations in this embodiment may be executed in the system configuration shown in FIG. 1, in the system configuration shown in FIG. 2, or in other system configurations.
  • "/” means “or” unless otherwise specified or unless it is clear from the context that it has a different meaning.
  • the terminal 20 wakes up, power is consumed, but if there is no signaling, the terminal 20 transitions to a sleep state. For example, as shown in Figure 4, if the terminal 20 knows that there is no scheduling signaling, it is possible to eliminate unnecessary wake-ups and achieve power savings.
  • the terminal 20 is assumed to be equipped with a simple receiver with low power consumption (e.g., a passive receiver) in addition to the Main Circuit for normal data transmission and reception.
  • this simple receiver will be referred to as a WUR (Wake up receiver).
  • the terminal 20 of this embodiment is equipped with a Main Circuit and a WUR.
  • the WUR may also be referred to as a wake-up receiver, a low-power receiver, a passive receiver, etc.
  • the WUR may also be referred to as a receiving unit.
  • the WUR may receive an existing signal, or a signal dedicated to the WUR (hereinafter referred to as WUS (Wake up Signal)).
  • WUS Wike up Signal
  • the WUS may be referred to as LP-WUS (Low Power WUS) or R-18 WUS. In the following, when "WUS" is written, it may be replaced with LP-WUS or R-18 WUS.
  • the terminal 20 can expect a significant reduction in power consumption by keeping the Main Circuit OFF while monitoring the presence or absence of data via the WUR. For example, as shown in FIG. 5, the terminal 20 keeps the Main Circuit OFF (or in deep sleep) during periods when there is no signaling or data traffic (specifically, periods when no WUS is detected), and turns the Main Circuit ON when it detects a WUS via the WUR. However, turning the Main Circuit ON when a WUS is detected via the WUR is just one example, and other operations may also be performed. For example, if a WUS is detected and addressed to the terminal 20, the terminal 20 may turn the Main Circuit ON. Also, if a WUS is periodically transmitted and no WUS is received, the terminal 20 may turn the Main Circuit ON.
  • the current specifications do not stipulate the operation of the terminal 20 equipped with the WUR (for example, the related operation between the WUR and the Main Circuit, the L1 procedure, etc.). Therefore, in the conventional technology, there is a problem that the terminal 20 equipped with the WUR cannot operate appropriately, and it is possible that power consumption cannot be sufficiently reduced.
  • the operation of a terminal 20 equipped with a WUR is specified to realize terminal operation that can reduce power consumption more than existing power saving technologies.
  • a first embodiment, a second embodiment, and a third embodiment are described as specific examples of the operation of a terminal 20 and a base station.
  • the above-mentioned issues are not limited to terminals equipped with a WUR, but are issues that can occur in all terminals that can operate in a low-power state (low-power consumption state). Furthermore, the technology related to the embodiments described below is not limited to terminals equipped with a WUR, but can be applied to all terminals that can operate in a low-power state.
  • the second and third embodiments are premised on the state transitions described in the first embodiment.
  • the technology of the first embodiment, the technology of the second embodiment, and the technology of the third embodiment may each be implemented independently.
  • the technology of the first embodiment, the technology of the second embodiment, and the technology of the third embodiment may be implemented in combination with any two of the technologies of the first embodiment, the technology of the second embodiment, and the technology of the third embodiment.
  • LPM Low Power mode
  • the terminal 20 in the LPM performs, for example, one or more, or all of the following operations (1) to (8).
  • the terminal 20 does not perform PDCCH monitoring in all or some of the search spaces (SS). For example, the terminal 20 performs PDCCH monitoring only in the Common SS and does not perform PDCCH monitoring in other SSs.
  • the terminal 20 does not receive Dynamic-PDSCH/SPS-PDSCH.
  • Terminal 20 does not perform UL DG/CG transmission.
  • the terminal 20 does not perform RRM measurements.
  • Terminal 20 does not perform the RACH procedure.
  • the terminal 20 does not perform cell reselection.
  • Terminal 20 does not perform RLM/BFM.
  • Terminal 20 does not perform paging or monitoring of system information.
  • a new RRC state (the above-mentioned LPM) may not be defined.
  • a period during which the above-mentioned LPM operation is performed in Connected or Inactive/Idle mode may be set.
  • this period will be referred to as Low Power duration (abbreviated as LPD). Note that calling this period LPD is merely an example, and LPD may be replaced with another word.
  • the terminal 20 may assume that it will transition from Connected mode or Inactive/Idle mode to LPM (or LPD).
  • the base station 10 may also assume that it will transition from Connected mode or Inactive/Idle mode to LPM (or LPD).
  • the terminal 20 may assume that it will transition from LPM or LPD to Connected mode or Inactive/Idle mode.
  • the base station 10 may also assume that the terminal 20 will transition from LPM or LPD to Connected mode or Inactive/Idle mode.
  • Figure 6 shows the transition patterns related to LPM.
  • Figure 7 shows the transition patterns related to LPD.
  • the WUR In a terminal 20 in an LPM or LPD state, for example, the WUR is turned ON and the Main Circuit is turned OFF (or in a sleep state). When the terminal 20 is in Connected mode or Inactive/Idle mode, the Main Circuit is turned ON. When the terminal 20 is in Connected mode or Inactive/Idle mode, the WUR may be turned ON or OFF.
  • LPM or LPD may be called a low power state.
  • the low power state may be a state in which the WUR is ON and the Main Circuit is OFF (or in a sleep state). Note that state transitions in the terminal 20 are performed, for example, by the control unit 240, which will be described later.
  • the state of the terminal 20 is clear, and the operations related to state transitions can be clearly defined.
  • the operation of the terminal 20 in the LPM (or LPD) will be described.
  • the operation of the terminal 20 in the LPM (or LPD) is mainly performed by the WUR.
  • the LPM (or LPD) described in the first embodiment is used here, the second embodiment may be performed independently of the first embodiment.
  • the operation described below may be the operation when the Main Circuit is OFF and the WUR is ON, regardless of the mode.
  • the terminal 20 performs, for example, one of the following Alt1 and Alt2 operations.
  • the terminal 20 periodically monitors the WUS in the LPM (or LPD).
  • the terminal 20 may monitor only the Search Space (hereinafter, LP-SS) in which the WUS is transmitted.
  • LP-SS Search Space
  • FIG. 9 shows an example of "monitoring only 3 symbols in one slot.”
  • the monitoring period of the terminal 20 in Alt2 may be specified in advance, or the base station 10 may set/notify the monitoring period to the terminal 20.
  • the method of setting/notifying the information may be any one of SIB, RRC, MAC CE, and DCI, or any combination of two or more of these.
  • the base station 10 may set/notify a plurality of pieces of information to the terminal 20 by SIB or RRC, and activate one of the pieces of information by MAC CE or DCI.
  • the terminal 20 uses the activated information.
  • N and M in “monitoring only N symbols in one slot” or “monitoring only N symbols in one slot and that slot has an M slot period” may be specified in specifications, etc., or may be set/notified from the base station 10 to the terminal 20.
  • the above terminal operation (Alt1/2) may be dynamically switched by an instruction from the base station 10 to the terminal 20.
  • the terminal 20 may be explicitly configured/instructed as to which operation to perform depending on the value of one bit in the LP-WUS or MAC CE/DCI. In other words, the terminal 20 determines which operation to perform based on the value of one bit in the LP-WUS or MAC CE/DCI transmitted by the base station 10.
  • the terminal 20 executes the operation of Alt1 when the value of 1 bit in the LP-WUS or MAC CE/DCI is "0", and executes the operation of Alt2 when the value of 1 bit is "1".
  • the terminal 20 may execute the operation of Alt1 when the value of 1 bit in the LP-WUS or MAC CE/DCI is "1”, and execute the operation of Alt2 when the value of 1 bit is "0".
  • the terminal 20 may implicitly switch between Alt1 and Alt2 when, for example, a specific control signal (e.g., CG-PDCCH) is detected.
  • a specific control signal e.g., CG-PDCCH
  • the terminal 20 may also notify the base station 10 of capability information (Capability) related to operation in LPM (or LPD). For example, the terminal 20 may notify the base station 10 of capability information indicating that only Alt1 is possible, capability information indicating that only Alt2 is possible, or capability information indicating that both Alt1 and Alt2 are possible, depending on its own capabilities.
  • Capability capability information
  • LPM LPD
  • the terminal 20 transmits capability information to the base station 10.
  • This capability information is assumed to be capability information indicating that both Alt1 and Alt2 are possible, for example.
  • the base station 10 receives this capability information. Based on the capability information received from the terminal 10, the base station 10 determines that the terminal 20 is capable of implementing both Alt1 and Alt2.
  • the terminal 20 is assumed to be in the LPM or LPD state.
  • the base station 10 creates an operation instruction for the terminal 20 based on the capability information received from the terminal 10, and transmits the operation instruction to the terminal 20 in S102. Since the base station 10 knows that the terminal 20 is capable of implementing both Alt1 and Alt2, it determines that it can issue instructions for both Alt1 and Alt2, and if it determines, for example, that it wants the terminal 20 to perform periodic monitoring, it issues an instruction for Alt2.
  • the terminal 20 receives an operation instruction from the base station 10.
  • the terminal 20 switches the operation in accordance with the operation instruction in S102. For example, if the terminal 20 is performing the Alt1 operation at the time of S102 and receives an instruction to perform the Alt2 operation, the terminal 20 switches the operation from Alt1 to Alt2.
  • step S101 is performed, for example, when the terminal 20 is in Connected mode.
  • Steps S102 and S103 are performed when the terminal 20 is in LPM or LPD mode.
  • S102 may also be performed when the terminal 20 is in Connected mode or Inactive/Idle mode.
  • the terminal 20 transitions from Connected mode or Inactive/Idle mode to LPM or LPD, it executes the operation of Alt1 or Alt2 according to the operation instruction received in S102.
  • Alt2-1 and Alt2-2 will be described as variations of Alt2 (setting of periodic monitoring of WUS) in the embodiment 2-1.
  • the terminal 20 may perform either operation of Alt2-1 or Alt2-2.
  • Alt2-1 Alt2-1 will be described with reference to the sequence diagram of Fig. 11.
  • the operation of Fig. 11 is performed, for example, when the terminal 20 is in the Connected mode or the Inactive/Idle mode.
  • the base station 10 notifies the terminal 20 of the minimum length of the On-duration by SIB/RRC/MAC CE/DCI.
  • the terminal 20 notifies the base station 10 of the desired value of the terminal 20 via PUCCH/PUSCH.
  • the desired value notified here is, for example, one or more of the monitoring period, the length of the on duration, and the monitoring start position, or all of these.
  • the length of the on duration as the desired value is equal to or greater than the minimum value received from the base station 10.
  • a setting value is transmitted from the base station 10 to the terminal 20.
  • the terminal 20 performs WUS monitoring operation in the LPM or LPD according to this setting value.
  • This setting value is, for example, one or more of the monitoring period, the length of the on duration, and the monitoring start position, or all of these.
  • the setting value may be the same as the desired value.
  • the terminal 20 performs the monitoring operation using the desired value sent in S202. Also, if no setting value was sent in S203 (or if the terminal 20 was unable to receive the setting value), the terminal 20 may perform the monitoring operation using a default value defined in the specifications, etc.
  • Alt2-2 information for the monitoring operation is notified from the base station 10 to the terminal 20 by SIB/RRC.
  • the notified information is any one or more of the monitoring period, the length of the on duration, and the monitoring start position, or all of them.
  • the terminal 20 performs the monitoring operation in the LPM or LPD according to the information notified from the base station 10.
  • FIG. 12 shows an example of the monitoring operation of the terminal 20.
  • the LP-WUS is transmitted from the base station 10 to the terminal 20, for example, at a predetermined time or in a predetermined LP-SS (Low Power Search Space).
  • the time/LP-SS may be defined in the specifications, or may be set by the base station 10 to the terminal 20 on a cell-by-cell, UE group-by-UE-by-UE basis. Also, assuming that the time/LP-SS is defined in the specifications, if the terminal 20 does not receive setting information for the time/LP-SS, the terminal 20 may use the time/LP-SS defined in the specifications.
  • the information that can be notified by the LP-WUS is, for example, any one or more of the following (1) to (4), or all of them. In addition, information other than the following (1) to (4) may also be notified by the LP-WUS.
  • the LP-WUS including the UE ID can be used as, for example, a state transition instruction.
  • the terminal 20 corresponding to the UE ID that received this LP-WUS by the WUR performs, for example, a state transition from LPM (or LPD) to another state (e.g., Connected mode, Inactive/Idle mode).
  • the terminal 20 corresponding to the UE ID that received this LP-WUS may perform a state transition from Connected mode or Inactive/Idle mode to LPM (or LPD).
  • the LP-WUS including the UE Group ID can be used as, for example, a state transition instruction.
  • the terminal 20 corresponding to the UE Group ID that received this LP-WUS by the WUR performs, for example, a state transition from LPM (or LPD) to another state (e.g., Connected mode, Inactive/Idle mode).
  • the terminal 20 corresponding to the UE Group ID that received this LP-WUS may perform a state transition from Connected mode or Inactive/Idle mode to LPM (or LPD).
  • Cell ID of the base station transmitting the LP-WUS (3) Cell ID of the base station transmitting the LP-WUS (4) Information Regarding WUS Monitoring Information regarding WUS monitoring is, for example, information notified to the terminal 20 from the base station 10 described in embodiments 2-1 and 2-2.
  • the second embodiment described above allows the terminal 20 to appropriately monitor the WUS in the LPM or LPD. Furthermore, the base station 10 can grasp the monitoring method (constant, periodic, etc.) of the terminal 20, and can appropriately transmit the WUS.
  • Condition 1 When a timer that is triggered when a state transitions to the Idle/Inactive mode expires, the terminal 20 starts a timer when it transitions from RRC connected (or LPD/LPM) to the Idle/Inactive mode, and transitions to LPM (or LPD) when the timer expires. Note that the "Idle/Inactive mode" may be collectively referred to as the idle state.
  • the timer used in condition 1 is reset (i.e., restarted by returning to the initial value) under certain conditions.
  • the conditions for resetting the timer are, for example, when one or more or all of the following conditions are met: (1) the terminal 20 receives a Paging Early Indication (PEI) or a Paging PDCCH, (2) data to be transmitted from the terminal 20 is generated, (3) the terminal 20 receives a Paging Message, and (4) the reception environment at the terminal 20 deteriorates.
  • the reception environment may deteriorate, for example, when the RSRP/RSRQ falls below a threshold value.
  • Condition 2 In the idle/inactive mode, when a timer that is triggered when a reference parameter value becomes equal to or greater than a threshold value expires For example, when the terminal 20 detects that a value equal to or greater than a specific value has been maintained for a certain period of time (e.g., several ms) as the RSRP value by measurement (i.e., when it detects that the timer has expired), it executes a state transition.
  • the specific value may be predefined by specifications or the like, may be implemented by the terminal 20, or may be a value set/notified to the terminal 20 by the base station 10.
  • RSRP reference parameter
  • RSSI RSSI
  • SINR SINR
  • SIR SIR
  • RSRQ RSRQ
  • multiple parameters may be used as the reference.
  • the reference parameters are defined in advance, for example, by specifications.
  • the terminal 20 may notify the base station 10 of the parameters it supports (or that it supports operations based on the parameters) as a capability, and then the terminal 20 may receive setting/notification of the "reference parameters" from the base station 10.
  • the terminal 20 uses the "reference parameters" set/notified by the base station 10.
  • the base station 10 can determine the "reference parameters" to set/notify the terminal 20 based on the capability received from the terminal 20.
  • the timer used in condition 2 is reset under certain conditions.
  • the conditions for resetting the timer are, for example, when one or more of the following conditions are met, or all of them are met: (1) the terminal 20 receives a Paging Early Indication (PEI) or a Paging PDCCH, (2) data to be transmitted from the terminal 20 is generated, (3) the terminal 20 receives a Paging Message, and (4) the reception environment at the terminal 20 deteriorates.
  • PEI Paging Early Indication
  • PDCCH Paging PDCCH
  • Condition 3 When a transition instruction is received by Paging/PEI in Idle/Inactive mode, the terminal 20 judges whether or not a transition has been made according to the value of a specific bit in the Paging PDCCH/PDSCH received from the base station 10. For example, the terminal 20 judges that there is no transition instruction if the value of the specific bit in the Paging PDCCH/PDSCH is "0", and judges that there is a transition instruction if the value of the specific bit in the Paging PDCCH/PDSCH is "1".
  • the terminal 20 may determine that there is no transition instruction if the value of the specific bit in the Paging PDCCH/PDSCH is "1", and may determine that there is a transition instruction if the value of the specific bit in the Paging PDCCH/PDSCH is "0".
  • the timer value is specified in advance, for example, by specifications.
  • the terminal 20 may notify the base station 10 of the timer values it supports (or that it supports a condition determination operation based on a timer) as a capability, and then the terminal 20 may receive setting/notification of the timer value from the base station 10.
  • the terminal 20 uses the timer value set/notified by the base station 10.
  • the base station 10 can determine the timer value to be set/notified to the terminal 20 based on the capability received from the terminal 20.
  • the time unit of the timer value may be s/ms/ ⁇ s, symbol, slot, subframe, SFN, HFN, etc., or other units may be used.
  • ⁇ Embodiment 3-1 Terminal operation during state transition>
  • the terminal 20 transitions from "RRC connected/Inactive/Idle mode” to "LPM (or LPD)".
  • LPM or LPD
  • a certain time delay
  • this delay is called an "Application delay”.
  • the terminal 20 does not perform/receive the operations/signals that are "not performed/received" as described in the first embodiment. Furthermore, during the application delay period, the terminal 20 may not perform PDCCH monitoring either. During the application delay period, operations are performed within the terminal 20, for example, to turn the Main Circuit from ON to OFF and turn the WUR from OFF to ON.
  • the application delay may be applied after the ARQ transmission, or the application delay may be applied immediately after the PDCCH is received.
  • Condition 1 When the WUR of the terminal 20 receives a WUS and the WUS includes a Wake Up instruction After the terminal 20 receives the above WUS, the terminal 20 performs (terminal operation A) "monitor paging with PO" or (terminal operation B) "perform RACH processing without monitoring paging with PO.” Details of these operations will be described later. Note that PO is an abbreviation for paging occasion.
  • the terminal 20 may receive a setting/notification from the base station 10 and determine whether to perform the terminal operation A or terminal operation B according to the setting/notification.
  • the above setting/notification method may be performed using any one of SIB, RRC, MAC CE, and DCI, or may be performed using a combination of any two or more of these.
  • Condition 2 When a WUS is not received for a certain period of time For example, when the terminal 20 transitions from a certain state to LPM (or LPD), a timer is started. When the terminal 20 detects that the timer has expired, it executes a state transition. When the terminal 20 detects the reception of a WUS, the timer is reset (it starts again from the initial value).
  • LPM or LPD
  • Condition 3 When transmission data occurs in terminal 20 For example, if data transmission is specified in terminal 20 periodically (e.g., once a day), a state transition is performed when transmission data occurs in terminal 20.
  • a beacon signal dedicated to the WUR will be used as a signal for establishing synchronization and performing measurements using the WUR. By using this beacon signal, it is possible to establish synchronization with a new base station and perform the measurement method.
  • This beacon signal may be used for both synchronization and measurement purposes, or the beacon signal may be used only for synchronization purposes, with a separate signal for the WUR being specified for measurement purposes.
  • Condition 5 When the Cell ID Notified by WUS is Changed
  • the information notified by WUS includes not only information related to waking up the terminal 20 but also the ID information of the base station in which the terminal 20 is camped (located).
  • the terminal 20 holds the Cell Id of the cell in which the terminal 20 was camped immediately before transitioning to LPM (or LPD).
  • LPM or LPD
  • the terminal 20 detects that the Cell Id it holds is different from the Cell ID notified by WUS, it transitions to one of the RRC connected/Inactive/Idle modes and searches for the cell in which it is currently camped.
  • ⁇ Embodiment 3-2 Terminal operation during state transition>
  • the terminal operation when transitioning from "LPM (or LPD)" to "RRC connected/Inactive/Idle mode” is described below.
  • the terminal operation when transitioning described below can be applied to any transition condition, but the following assumes a case where transition is made by WUS reception as an example.
  • Terminal operation A The terminal 20 performs a state transition and monitors paging at PO (1-1) Monitoring operation at PO There are variations of Alt1 to Alt3 as follows for the monitoring operation at PO in terminal operation A. Which Alt among Alt1 to Alt3 is to be implemented may be specified by specifications or the like, or may be set/notified to the terminal 20 by the base station 10.
  • Alt1 The terminal 20 monitors the Paging PDCCH in the PO to which the terminal 20 is linked.
  • Alt2 The terminal 20 monitors the Paging PDCCH in the PO that is closest in time to the time when the LP-WUS was received.
  • Alt3 A PO for the LP-WUS is defined, and the terminal 20 monitors the Paging PDCCH in the PO.
  • Alt1 to Alt2 Operation Based on Reception at PO
  • Alt1 to Alt2 may be specified by specifications or the like, or may be set/notified to the terminal 20 by the base station 10.
  • Alt1 When the terminal 20 receives Paging via PO, it performs RACH processing, which starts with transmitting Msg1 via RO.
  • An example of operation in this case is shown in Fig. 14.
  • the terminal 20 transitions to Idle/Inactive mode by receiving WUS via WUR in LPM (or LPD).
  • Idle/Inactive mode the terminal 20 receives SSB via Main Circuit, monitors PO, and when it receives Paging, transmits Msg1 via RO.
  • Fig. 14 (Figs. 15 and 16) shows an image of the magnitude of power consumption for each of WUR and Main Circuit.
  • the RACH processing may be simplified RACH processing, which will be described as RACH processing in terminal operation B.
  • Alt2 When the terminal 20 does not receive a paging message in the PO (or when it receives only a short message), it maintains the idle state (Idle/Inactive mode) or transitions to LPM (or LPD). An example of the operation when maintaining the idle state (Idle/Inactive mode) is shown in Fig. 15, and an example of the operation when transitioning to LPM (or LPD) is shown in Fig. 16.
  • FIG. 17 shows CBRA (Contention based Random Access, contention-based random access) as an example, but the technology according to the present invention is also applicable to CFRA (Contention Free Random Access) procedures.
  • the RACH process (RACH procedure) is performed by, for example, the control units 140 and 240 described later.
  • the transmission and reception of signals/messages in the RACH process (RACH procedure) performed by the control units 140 and 240 is performed by the transmission units 110 and 210 and the reception units 120 and 220.
  • the base station 10 transmits an SSB for each beam, and the terminal 20 monitors the SSB for each beam.
  • the RACH occasion (PRACH occasion) may be referred to as RO.
  • the terminal 20 that receives Msg 2 transmits Message 3 (Msg 3) including predetermined information to the base station 10 (S3).
  • the base station 10 that receives Msg3 transmits Message 4 (Msg4) to the terminal 20 (S4).
  • Msg4 Message 4
  • S4 the terminal 20 confirms that the above-mentioned specific information is included in Msg4, it recognizes that the Msg4 is addressed to itself and corresponds to the above-mentioned Msg3 (Contention resolution: OK).
  • Terminal operation B The terminal 20 performs a state transition and performs RACH processing without monitoring at the PO. Regarding terminal operation B, the operation of the RACH processing is changed depending on "whether TA synchronization is achieved or not.” Details of this operation will be described later.
  • TA synchronization is timing synchronization between the terminal 20 and the base station 10, and TA is an abbreviation for Timing Advance.
  • a new simplified RACH process may be specified as the RACH process for the LP-WUS.
  • the terminal 20 can determine that TA synchronization is achieved during the period during which the TA value (Timing Advance) it holds is valid. Whether the TA value (Timing Advance) it holds is valid can be determined by whether the TA (Time Alignment) timer is running or has expired. If the TA timer has expired, it can be determined that the TA value is not valid. When a new TA value is provided to the terminal 20, the TA timer is restarted.
  • Alt-B-1 When the terminal 20 transitions from "LPM (or LPD)" to "RRC connected/Inactive/Idle mode", it starts RACH processing from the transmission of Msg1 without monitoring PO.
  • LPM or LPD
  • RRC connected/Inactive/Idle mode There are the following variations of Alt-B-1-1 and Alt-B-1-2 regarding what resources are used as PRACH resources for transmitting Msg1.
  • Alt-B-1-1 is based on a new RACH procedure
  • Alt-B-1-2 is based on an existing RACH procedure.
  • the PRACH resource may be called RO (Rach occasion).
  • Alt-B-1-1 A resource for transmitting Msg1 for LP-WUS is defined, and terminal 20 transmits Msg1 using that resource.
  • the terminal 20 transmits Msg1 using resources that are a time offset after the time the WUS is received.
  • the value of the time offset may be specified in the specifications or may be notified by the WUS.
  • Msg1 transmission resources may be set in advance, and when the terminal 20 receives a WUS, the terminal 20 may transmit Msg1 using those resources.
  • RO information Msg1 transmission resource information
  • the terminal 20 After receiving SIB1 from the base station 10 (obtaining RO information), the terminal 20 starts RACH processing from Msg1. If the terminal 20 has already received RO information, the terminal 20 may skip receiving SIB1 if a timer for determining whether the acquired RO information is valid has not expired. Note that while the timer is running, the acquired RO information is determined to be valid. The timer is restarted when the terminal 20 newly acquires RO information.
  • ⁇ Terminal operation B When TA synchronization is achieved> Regarding the terminal operation B (operation after state transition) when TA synchronization is achieved, there are variations of Alt-B-2 to Alt-B-5.
  • Alt-B-2 to Alt-B-5 First, an overview of Alt-B-2 to Alt-B-5 will be described with reference to Fig. 18.
  • Fig. 18 also shows the operation of Alt-B-1 (based on the existing RACH procedure) already described.
  • RACH processing begins with the transmission of Msg1.
  • RACH processing begins with the reception of Msg2.
  • RACH processing begins with the transmission of Msg3.
  • RACH processing begins with the reception of Msg4.
  • data transmission and reception begins without performing RACH processing.
  • RACH processing is started by receiving Msg2, transmission and reception of Msg2, transmission and reception of Msg3, and transmission and reception of Msg4 are performed between the terminal 20 and the base station 10. If RACH processing is started by sending Msg3, transmission and reception of Msg3 and transmission and reception of Msg4 are performed between the terminal 20 and the base station 10. If RACH processing is started by receiving Msg4, transmission and reception of Msg4 are performed between the terminal 20 and the base station 10.
  • the terminal 20 may implement any of Alt-B-2 to Alt-B-5 described below. Which Alt to implement may be specified in advance by specifications, etc., or may be set/notified to the terminal 10 by the base station 10.
  • the resources (PDCCH and/or PDSCH) for receiving Msg2 are available in the following variations Alt-B-2-1 and Alt-B-2-2.
  • Alt-B-2-1 is based on the new RACH procedure
  • Alt-B-2-2 is based on the existing RACH procedure.
  • Alt-B-2-1 A resource for receiving Msg2 for LP-WUS is defined, and the terminal 20 receives Msg2 using that resource.
  • the base station 10 transmits Msg2 using that resource.
  • the terminal 20 receives Msg2 using resources that are a time offset after the time the WUS is received.
  • the base station 10 transmits Msg2 using resources that are a time offset after the time the WUS is transmitted.
  • the value of the time offset may be specified in the specifications, or may be notified in the WUS.
  • Msg2 reception resources may be set in advance, and when the terminal 20 receives a WUS, it may perform Msg2 reception using those resources. Also, for example, the Msg2 resources (PDCCH and/or PDSCH) may be notified by WUS.
  • Alt-B-2-2 After receiving SIB1 from the base station 10 (obtaining RO information), the terminal 20 starts RACH processing from Msg2. If the terminal 20 has already received RO information, the terminal 20 may skip receiving SIB1 if a timer for determining whether the acquired RO information is valid has not expired. Note that while the timer is running, the acquired RO information is determined to be valid. The timer is restarted when new RO information is acquired.
  • the terminal 20 may perform either Alt1 or Alt2 described below.
  • the terminal 20 may be configured/informed by the base station 10 as to which operation to perform.
  • Alt 1 of Alt-B-2-2 The terminal 20 performs RACH from the transmission of Msg 1. If the terminal 20 does not receive Msg 2 even after repeating the transmission of Msg 1 a specified number of times, the terminal 20 performs the following operation of Alt 2.
  • Alt2 of Alt-B-2-2 The terminal 20 stops the RACH process and transitions to LPM (or LPD) or performs terminal operation in the existing Inactive/Idle mode.
  • the base station 10 may notify the terminal 20 of the information to be notified in the existing Msg 2 as is, or may notify only a part of the information to be notified in the existing Msg 2.
  • the part of information is, for example, the TC-RNTI and a UL scheduling grant for the terminal 20 to transmit Message 3.
  • the RNTI for scrambling the CRC of the DCI for Msg 2 of Alt-B-2 a new RNTI or an existing RNTI may be used.
  • the resources (PUCCH or PUSCH) for transmitting Msg3 are the following variations of Alt-B-3-1 and Alt-B-3-2.
  • Alt-B-3-1 A resource for transmitting Msg3 for LP-WUS is defined, and terminal 20 transmits Msg3 using that resource.
  • the terminal 20 transmits Msg3 using resources that are a time offset after the time the WUS is received.
  • the value of the time offset may be specified in the specifications or may be notified by the WUS.
  • Msg3 transmission resources may be set in advance, and when the terminal 20 receives a WUS, it may transmit Msg3 using those resources. Also, for example, the Msg3 transmission resources may be notified by the WUS.
  • Alt-B-3-2 After receiving SIB1 from the base station 10 (obtaining RO information), the terminal 20 starts RACH processing from Msg3. If the terminal 20 has already received RO information, the terminal 20 may skip receiving SIB1 if a timer for determining whether the acquired RO information is valid has not expired. Note that while the timer is running, the acquired RO information is determined to be valid. The timer is restarted when new RO information is acquired.
  • the terminal 20 may transmit to the base station 10 the information to be transmitted in the existing Msg 3 as is, or may transmit only a part of the information to be transmitted in the existing Msg 3.
  • the part of information is, for example, the UE ID.
  • the resources (PDCCH or PDSCH) for receiving Msg4 are the following variations of Alt-B-4-1 and Alt-B-4-2.
  • Alt-B-4-1 A resource for receiving Msg4 for LP-WUS is defined, and the terminal 20 receives Msg4 using that resource.
  • the base station 10 transmits Msg4 using that resource.
  • the terminal 20 receives Msg4 using resources that are a time offset after the time the WUS is received.
  • the base station 10 transmits Msg4 using resources that are a time offset after the time the WUS is transmitted.
  • the value of the time offset may be specified in the specifications, or may be notified in the WUS.
  • Msg4 reception resources may be set in advance, and when the terminal 20 receives a WUS, it may perform Msg4 reception using those resources. Also, for example, the Msg4 resources (PDCCH and/or PDSCH) may be notified by WUS.
  • Alt-B-4-2 After receiving SIB1 from the base station 10 (obtaining RO information), the terminal 20 starts RACH processing from Msg4. If the terminal 20 has already received RO information, the terminal 20 may skip receiving SIB1 if a timer for determining whether the acquired RO information is valid has not expired. Note that while the timer is running, the acquired RO information is determined to be valid. The timer is restarted when new RO information is acquired.
  • the base station 10 may notify the terminal 20 of the information notified in the existing Msg 4 as is, or may notify only a part of the information notified in the existing Msg 4.
  • the part of information is, for example, a UE ID.
  • the RNTI for scrambling the CRC of the DCI for Msg 4 of Alt-B-4 a new RNTI may be used, or an existing RNTI may be used.
  • a dedicated timer may be defined as the parameter as a criterion for simplification, and the terminal 20 may use that timer.
  • the terminal 20 implements one of Alt-B-2 to Alt-B-4.
  • the base station 10 may set/notify the terminal 20 which of Alt-B-2 to Alt-B-4 to implement before the timer expires.
  • the terminal 20 starts RACH processing by transmitting Msg1.
  • This timer may be a TA timer or a timer other than a TA timer.
  • the above-mentioned RACH process (including the simplified one) is based on a four-step RACH.
  • the RACH process (including the simplified one) in this embodiment is not limited to the four-step RACH, and may be based on a two-step RACH.
  • the terminal 20 transmits a Message A (Msg A) having a preamble and data to the base station 10.
  • Msg A Message A
  • the terminal 20 selects a PRACH resource in the same manner as the selection of a PRACH resource (RACH occasion) in a four-step RACH, transmits a preamble on the PRACH resource, and transmits data on a PUSCH resource (called a PUSCH occasion) linked to the PRACH resource.
  • the preamble and data here correspond to, for example, Msg 1 and Msg 3 in a four-step RACH.
  • the base station 10 transmits Message B (MsgB) to the terminal 20.
  • MsgB Message B
  • the content of MsgB corresponds to, for example, Msg2 and Msg4 in a 4-step RACH.
  • state transitions can be performed appropriately. Furthermore, although a delay is required when transitioning from "LPM (or LPD)" to "RRC connected/Inactive/Idle mode", by implementing simplified RACH processing, the RACH processing can be completed in a short time, and data transmission and reception can be started in a short time after the transition.
  • terminal operation B (RACH processing/simplified RACH processing without monitoring PO when a specific signal is received) is not limited to the operation at the time of transition from "LPM (or LPD)" to "RRC connected/Inactive/Idle mode".
  • terminal operation B may be executed at the time of transition from Idle mode to RRC connected/Inactive mode.
  • Idle mode is an example of the terminal 20 being in a low power state.
  • Fig. 21 is a diagram showing an example of the functional configuration of the base station 10.
  • the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140.
  • the functional configuration shown in Fig. 21 is merely an example. As long as the operation related to the embodiment of the present invention can be executed, the names of the functional divisions and the functional units may be any.
  • the transmitting unit 110 and the receiving unit 120 may be collectively referred to as a communication unit.
  • the transmitter 110 has a function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly.
  • the receiver 120 has a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information of a higher layer from the received signals.
  • the transmitter 110 also has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL/UL control signals, DCI via PDCCH, data via PDSCH, etc. to the terminal 20.
  • the setting unit 130 stores pre-set setting information and various setting information to be transmitted to the terminal 20 in a storage device provided in the setting unit 130, and reads it from the storage device as necessary.
  • the control unit 140 schedules DL reception or UL transmission of the terminal 20 via the transmission unit 110.
  • the control unit 140 also includes a function for performing a random access procedure.
  • the functional unit related to signal transmission in the control unit 140 may be included in the transmission unit 110, and the functional unit related to signal reception in the control unit 140 may be included in the reception unit 120.
  • the transmission unit 110 may also be called a transmitter, and the reception unit 120 may also be called a receiver.
  • Fig. 22 is a diagram showing an example of the functional configuration of the terminal 20.
  • the terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240.
  • the functional configuration shown in Fig. 22 is merely an example. As long as the operation related to the embodiment of the present invention can be executed, the names of the functional divisions and the functional units may be any.
  • the transmitting unit 210 and the receiving unit 220 may be collectively referred to as a communication unit.
  • the transmitter 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly.
  • the receiver 220 receives various signals wirelessly and obtains higher layer signals from the received physical layer signals.
  • the receiver 220 also has the function of receiving NR-PSS, NR-SSS, NR-PBCH, DL/UL/SL control signals, DCI via PDCCH, data via PDSCH, etc. transmitted from the base station 10.
  • the transmitting unit 210 may transmit a PSCCH (Physical Sidelink Control Channel), a PSSCH (Physical Sidelink Shared Channel), a PSDCH (Physical Sidelink Discovery Channel), a PSBCH (Physical Sidelink Broadcast Channel), or the like to another terminal 20 as D2D communication, and the receiving unit 220 may receive a PSCCH, a PSSCH, a PSDCH, or a PSBCH, or the like, from the other terminal 20.
  • a PSCCH Physical Sidelink Control Channel
  • PSSCH Physical Sidelink Shared Channel
  • PSDCH Physical Sidelink Discovery Channel
  • PSBCH Physical Sidelink Broadcast Channel
  • the setting unit 230 stores various setting information received from the base station 10 or other terminals by the receiving unit 220 in a storage device provided in the setting unit 230, and reads it from the storage device as necessary.
  • the setting unit 230 also stores setting information that is set in advance.
  • the control unit 240 controls the terminal 20.
  • the control unit 240 includes a function for performing a random access procedure.
  • the functional unit in the control unit 240 related to signal transmission may be included in the transmitting unit 210, and the functional unit in the control unit 240 related to signal reception may be included in the receiving unit 220.
  • the transmitting unit 210 may be called a transmitter, and the receiving unit 220 may be called a receiver.
  • the control unit 240 may also perform measurements, LBT, etc. Measurements may also be performed by the receiving unit 220.
  • the receiving unit 220 includes a WUR. Also, as shown in FIG. 23, the WUR 211 may be provided outside the receiving unit 220. The WUR 211 may be referred to as the receiving unit. The WUR 211 and the receiving unit 220 may be collectively referred to as the receiving unit.
  • the "receiving unit 220, transmitting unit 210, setting unit 230, and control unit 240" correspond to the Main Circuit.
  • the "receiving unit 220, transmitting unit 210, setting unit 230, and control unit 240" correspond to the Main Circuit, even if the Main Circuit is OFF, the WUR 211 can execute all of the operations in the LPM or LPD described in this embodiment.
  • the Main Circuit may have some processing functions (e.g., transition determination by the control unit 240, etc.), and the WUR 211 may only monitor/receive the WUS.
  • ⁇ Appendix 1> a receiving unit that monitors a specific signal transmitted from a base station in a low power state; a control unit that switches between an operation of constantly monitoring the specific signal and an operation of periodically monitoring the specific signal based on an instruction from the base station.
  • the specific signal is used as an instruction for the terminal to transition from the low power state to another state.
  • the specific signal includes at least one of a terminal ID, a terminal group ID, a cell ID of the base station, and information on a monitoring period of the specific signal.
  • a receiving unit that receives capability information related to an operation of monitoring a specific signal in a low power state from a terminal; a transmitting unit that transmits to the terminal a signal instructing the terminal to constantly monitor the specific signal or periodically monitor the specific signal based on the capability information.
  • a receiving unit that receives capability information related to an operation of monitoring a specific signal in a low power state from a terminal; a transmitting unit that transmits to the terminal a signal instructing the terminal to constantly monitor the specific signal or periodically monitor the specific signal based on the capability information.
  • Additional Note 5 monitoring a particular signal transmitted from a base station in a low power state; and switching between an operation of constantly monitoring the specific signal and an operation of periodically monitoring the specific signal based on an instruction from the base station.
  • Supplementary Items 1 to 5 provide technology that enables a terminal capable of operating in a low-power state to operate appropriately.
  • Supplementary Item 2 allows a specific signal to be used to indicate a state transition.
  • Supplementary Item 3 allows a specific signal to be used to communicate information required for control/settings.
  • ⁇ Appendix 2> a control unit that executes a state transition from a specific state other than the low power state to the low power state when a timer expires or when a state transition instruction is received from a base station; a receiving unit that monitors a specific signal transmitted from the base station in the low power state.
  • the timer is a timer that is started when the terminal transitions from a certain state to the specific state, or a timer that is started when a value of a parameter indicating a reception state in the terminal becomes equal to or greater than a threshold.
  • Supplementary Items 1 to 5 provide technology that enables a terminal capable of operating in a low power state to operate appropriately.
  • Supplementary Item 2 allows an appropriate timer to be used for the state transition from a specific state that is not a low power state to a low power state.
  • Supplementary Item 3 allows operation that takes the transition time into consideration.
  • each functional block may be realized using one device that is physically or logically coupled, or may be realized using two or more devices that are physically or logically separated and directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices.
  • the functional blocks may be realized by combining the one device or the multiple devices with software.
  • Functions include, but are not limited to, judgement, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, regard, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment.
  • a functional block (component) that performs the transmission function is called a transmitting unit or transmitter.
  • the base station 10, terminal 20, etc. in one embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure.
  • FIG. 24 is a diagram showing an example of the hardware configuration of the base station 10 and terminal 20 in one embodiment of the present disclosure.
  • the above-mentioned base station 10 and terminal 20 may be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.
  • the term "apparatus" can be interpreted as a circuit, device, unit, etc.
  • the hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured to exclude some of the devices.
  • the functions of the base station 10 and the terminal 20 are realized by loading specific software (programs) onto hardware such as the processor 1001 and the storage device 1002, causing the processor 1001 to perform calculations, control communications by the communication device 1004, and control at least one of the reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.
  • the processor 1001 for example, operates an operating system to control the entire computer.
  • the processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, registers, etc.
  • CPU central processing unit
  • control unit 140, control unit 240, etc. may be realized by the processor 1001.
  • the processor 1001 reads out a program (program code), software module, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and executes various processes according to the program.
  • the program is a program that causes a computer to execute at least a part of the operations described in the above-mentioned embodiment.
  • the control unit 140 of the base station 10 shown in FIG. 21 may be stored in the storage device 1002 and realized by a control program that runs on the processor 1001.
  • the control unit 240 of the terminal 20 shown in FIG. 22 and FIG. 23 may be stored in the storage device 1002 and realized by a control program that runs on the processor 1001.
  • the processor 1001 may be implemented by one or more chips.
  • the program may be transmitted from a network via a telecommunication line.
  • the storage device 1002 is a computer-readable recording medium and may be composed of, for example, at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), a RAM (Random Access Memory), etc.
  • the storage device 1002 may also be called a register, a cache, a main memory, etc.
  • the storage device 1002 can store executable programs (program codes), software modules, etc. for implementing a communication method relating to one embodiment of the present disclosure.
  • the auxiliary storage device 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray (registered trademark) disk), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, etc.
  • the above-mentioned storage medium may be, for example, a database, a server, or other suitable medium that includes at least one of the storage device 1002 and the auxiliary storage device 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, for example, a network device, a network controller, a network card, a communication module, etc.
  • the communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., to realize at least one of, for example, Frequency Division Duplex (FDD) and Time Division Duplex (TDD).
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • a transmitting/receiving antenna, an amplifier unit, a transmitting/receiving unit, a transmission line interface, etc. may be realized by the communication device 1004.
  • the transmitting/receiving unit may be implemented as a transmitting unit and a receiving unit that are physically or logically separated. In this embodiment, it is assumed that the communication device 1004 includes a WUR (e
  • the input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside.
  • the output device 1006 is an output device (e.g., 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 be integrated into one structure (e.g., a touch panel).
  • each device such as the processor 1001 and the storage device 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 each device.
  • the base station 10 and the terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware.
  • the processor 1001 may be implemented using at least one of these pieces of hardware.
  • the terminal 20 or the base station 10 may be provided in the vehicle 2001.
  • FIG. 25 shows an example of the configuration of the vehicle 2001.
  • the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021-2029, an information service unit 2012, and a communication module 2013.
  • the terminal 20 or the base station 10 according to each aspect/embodiment described in this disclosure may be applied to a communication device mounted on the vehicle 2001, for example, may be applied to the 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 called a handlebar), 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 a communication port (IO port) 2033. Signals are input to the electronic control unit 2010 from various sensors 2021 to 2029 provided in the vehicle 2001.
  • the electronic control unit 2010 may also be called an ECU (Electronic Control Unit).
  • Signals from the various sensors 2021-2029 include a current signal from a current sensor 2021 that senses the motor current, a front and rear wheel rotation speed signal obtained by a rotation speed sensor 2022, a front and rear wheel air pressure signal obtained by an air pressure sensor 2023, a vehicle speed signal obtained by a vehicle speed sensor 2024, an acceleration signal obtained by an acceleration sensor 2025, an accelerator pedal depression amount signal obtained by an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained by a brake pedal sensor 2026, a shift lever operation signal obtained by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028.
  • the information service unit 2012 is composed of various devices, such as a car navigation system, an audio system, speakers, a television, and a radio, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices.
  • the information service unit 2012 uses information acquired from an external device via the communication module 2013 or the like to provide various multimedia information and multimedia services to the occupants of the vehicle 2001.
  • the information service unit 2012 may include input devices (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) that accept input from the outside, and may also include output devices (e.g., a display, a speaker, an LED lamp, a touch panel, etc.) that perform output to the outside.
  • input devices e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.
  • output devices e.g., a display, a speaker, an LED lamp, a touch panel, etc.
  • the driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driving burden on the driver, such as a millimeter wave radar, LiDAR (Light Detection and Ranging), a camera, a positioning locator (e.g., GNSS, etc.), map information (e.g., high definition (HD) maps, autonomous vehicle (AV) maps, etc.), a gyro system (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chip, and AI processor, as well as one or more ECUs that control these devices.
  • the driving assistance system unit 2030 transmits and receives various information via the communication module 2013 to realize driving assistance functions or autonomous driving functions.
  • the communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via the communication port.
  • the communication module 2013 transmits and receives data via the communication port 2033 between the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 29, which are provided on the vehicle 2001.
  • 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 the external device via wireless communication.
  • the communication module 2013 may be located either inside or outside the electronic control unit 2010.
  • the external device may be, for example, a base station, a mobile station, etc.
  • the communication module 2013 may transmit at least one of the signals from the various sensors 2021-2028 described above input to the electronic control unit 2010, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 2012 to an external device via wireless communication.
  • the electronic control unit 2010, the various sensors 2021-2028, the information service unit 2012, etc. may be referred to as input units that accept 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, vehicle distance information, etc.) transmitted from an external device and displays it on the information service unit 2012 provided in the vehicle 2001.
  • the information service unit 2012 may be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH (or data/information decoded from the PDSCH) received by the communication module 2013).
  • the communication module 2013 also stores various information received from an external device in a memory 2032 that can be used by the microprocessor 2031.
  • the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021 to 2029, etc. provided in the vehicle 2001.
  • the operations of multiple functional units may be physically performed by one part, or the operations of one functional unit may be physically performed by multiple parts.
  • the order of the processing procedures described in the embodiment may be changed as long as there is no contradiction.
  • the base station 10 and the terminal 20 have been described using functional block diagrams, but such devices may be realized by hardware, software, or a combination thereof.
  • the software operated by the processor possessed by the base station 10 in accordance with an embodiment of the present invention and the software operated by the processor possessed by the terminal 20 in accordance with an embodiment of the present invention may each be stored in random access memory (RAM), flash memory, read only memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.
  • the 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 be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling), broadcast information (Master Information Block (MIB), System Information Block (SIB)), other signals, or a combination of these.
  • RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.
  • Each aspect/embodiment described in this disclosure may be a mobile communication system (mobile communications system) for mobile communications over a wide range of networks, including LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal number)), FRA (Future Ra).
  • the present invention may be applied to at least one of systems using IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), and other appropriate systems, and next-generation systems that are expanded, modified, created, or defined based on these. It may also be applied to a combination of multiple systems (for example, a combination of at least one
  • certain operations that are described as being performed by the base station 10 may in some cases be performed by its upper node.
  • various operations performed for communication with a terminal 20 may be performed by at least one of the base station 10 and other network nodes other than the base station 10 (such as, but not limited to, an MME or S-GW).
  • the base station 10 may be a combination of multiple other network nodes (such as an MME and an S-GW).
  • the information or signals described in this disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). They may be input and output via multiple network nodes.
  • the input and output information may be stored in a specific location (e.g., memory) or may be managed using a management table.
  • the input and output information may be overwritten, updated, or added to.
  • the output information may be deleted.
  • the input information may be sent to another device.
  • the determination in this disclosure may be based on a value represented by one bit (0 or 1), a Boolean (true or false) value, or a comparison of numerical values (e.g., a comparison with a predetermined value).
  • Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
  • Software, instructions, information, etc. may also be transmitted and received via a transmission medium.
  • a transmission medium For example, if the software is transmitted from a website, server, or other remote source using at least one of wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and/or wireless technologies (such as infrared, microwave), then at least one of these wired and wireless technologies is included within the definition of a transmission medium.
  • wired technologies such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)
  • wireless technologies such as infrared, microwave
  • the information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies.
  • the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.
  • the channel and the symbol may be a signal (signaling).
  • the signal may be a message.
  • the component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.
  • system and “network” are used interchangeably.
  • a radio resource may be indicated by an index.
  • the names used for the above-mentioned parameters are not limiting in any respect. Furthermore, the formulas etc. using these parameters may differ from those explicitly disclosed in this disclosure.
  • the various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not limiting in any respect.
  • base station BS
  • radio base station base station
  • base station fixed station
  • NodeB eNodeB
  • gNodeB gNodeB
  • access point e.g., "transmission point”
  • gNodeB gNodeB
  • a base station may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.
  • a base station can accommodate one or more (e.g., three) cells.
  • a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)).
  • RRH Remote Radio Head
  • the term "cell” or “sector” refers to a part or the entire coverage area of at least one of the base station and base station subsystems that provide communication services in this coverage.
  • a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control or operate based on the information.
  • MS Mobile Station
  • UE User Equipment
  • a mobile station may also be referred to 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 terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.
  • At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc.
  • At least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.
  • the moving object is a movable object, and the moving speed is arbitrary. It also includes the case where the moving object is stopped.
  • the moving object includes, but is not limited to, for example, a vehicle, a transport vehicle, an automobile, a motorcycle, a bicycle, a connected car, an excavator, a bulldozer, a wheel loader, a dump truck, a forklift, a train, a bus, a handcar, a rickshaw, a ship and other watercraft, an airplane, a rocket, an artificial satellite, a drone (registered trademark), a multicopter, a quadcopter, a balloon, and objects mounted thereon.
  • the moving object may also be a moving object that travels autonomously based on an operation command.
  • At least one of the base station and the mobile station may be a device that does 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 read as a terminal.
  • each aspect/embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a terminal is replaced with communication between multiple terminals 20 (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)).
  • the terminal 20 may be configured to have the functions of the base station 10 described above.
  • terms such as "uplink” and "downlink” may be read as terms corresponding to communication between terminals (for example, "side”).
  • the uplink channel, downlink channel, etc. may be read as a side channel.
  • the terminal in this disclosure may be interpreted as a base station.
  • the base station may be configured to have the functions of the terminal described above.
  • determining may encompass a wide variety of actions.
  • Determining and “determining” may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., searching in a table, database, or other data structure), and considering ascertaining as “judging” or “determining.”
  • determining and “determining” may include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and considering ascertaining as “judging” or “determining.”
  • judgment” and “decision” can include considering resolving, selecting, choosing, establishing, comparing, etc., to have been “judged” or “decided.” In other words, “judgment” and “decision” can include considering some action to have been “judged” or “decided.” Additionally, “judgment (decision)” can be interpreted as “assuming,” “ex
  • connection refers to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other.
  • the coupling or connection between elements may be physical, logical, or a combination thereof.
  • “connected” may be read as "access.”
  • two elements may be considered to be “connected” or “coupled” to each other using at least one of one or more wires, cables, and printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.
  • the reference signal may also be abbreviated as RS (Reference Signal) or may be called a pilot depending on the applicable standard.
  • the phrase “based on” does not mean “based only on,” unless expressly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
  • any reference to an element using a designation such as "first,” “second,” etc., 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, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must precede the second element in some way.
  • a radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.
  • Numerology may be a communication parameter that applies to at least one of the transmission and reception of a signal or channel. Numerology may indicate, for example, at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, a specific filtering process performed by the transceiver in the frequency domain, a specific windowing process performed by the transceiver in the time domain, etc.
  • SCS subcarrier spacing
  • TTI transmission time interval
  • radio frame structure a specific filtering process performed by the transceiver in the frequency domain
  • a specific windowing process performed by the transceiver in the time domain etc.
  • a slot may consist of one or more symbols in the time domain (such as OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.).
  • a slot may be a time unit based on numerology.
  • a slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot.
  • a PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A.
  • a PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.
  • Radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals. Radio frame, subframe, slot, minislot, and symbol may each be referred to by a different name that corresponds to the radio frame, subframe, slot, minislot, and symbol.
  • one subframe may be called a transmission time interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI.
  • TTI transmission time interval
  • the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms.
  • the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.
  • one slot may be called a unit time. The unit time may differ for each cell depending on the numerology.
  • TTI refers to, for example, the smallest time unit for scheduling in wireless communication.
  • a base station performs scheduling to allocate wireless resources (such as frequency bandwidth and transmission power that can be used by each terminal 20) to each terminal 20 in TTI units.
  • wireless resources such as frequency bandwidth and transmission power that can be used by each terminal 20
  • TTI is not limited to this.
  • the TTI may be a transmission time unit for a channel-coded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc.
  • the time interval e.g., the number of symbols
  • the time interval in which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.
  • one or more TTIs may be the minimum time unit of scheduling.
  • the number of slots (minislots) that constitute the minimum time unit of scheduling may be controlled.
  • a TTI having 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 shorter than a normal TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.
  • a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms
  • a short TTI e.g., a shortened TTI, etc.
  • TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.
  • 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 the numerology, and may be, for example, 12.
  • the number of subcarriers included in an RB may be determined based on the numerology.
  • 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 may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.
  • PRB physical resource block
  • SCG sub-carrier group
  • REG resource element group
  • PRB pair an RB pair, etc.
  • a resource block may be composed of one or more resource elements (REs).
  • REs resource elements
  • one RE may be a radio resource area of one subcarrier and one symbol.
  • a Bandwidth Part which may also be referred to as a partial bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by an index of the RB relative to a common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within the BWP.
  • the BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP).
  • UL BWP UL BWP
  • DL BWP DL BWP
  • One or more BWPs may be configured for a UE within one carrier.
  • 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 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 subcarriers included in an RB, as well as the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.
  • a and B are different may mean “A and B are different from each other.”
  • the term may also mean “A and B are each different from C.”
  • Terms such as “separate” and “combined” may also be interpreted in the same way as “different.”
  • notification of specific information is not limited to being done explicitly, but may be done implicitly (e.g., not notifying the specific information).
  • Base station 110 Transmitter 120 Receiver 130 Setting unit 140 Control unit 20 Terminal 210 Transmitter 220 Receiver 230 Setting unit 240 Control unit 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device 2001 Vehicle 2002 Drive unit 2003 Steering unit 2004 Accelerator pedal 2005 Brake pedal 2006 Shift lever 2007 Front wheel 2008 Rear wheel 2009 Axle 2010 Electronic control unit 2012 Information service unit 2013 Communication module 2021 Current sensor 2022 Rotational speed sensor 2023 Air pressure sensor 2024 Vehicle speed sensor 2025 Acceleration sensor 2026 Brake pedal sensor 2027 Shift lever sensor 2028 Object detection sensor 2029 Accelerator pedal sensor 2030 Driving assistance system unit 2031 Microprocessor 2032 Memory (ROM, RAM) 2033 Communication port (IO port)

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

Abstract

L'invention concerne un terminal comprenant : une unité de réception qui, dans un état de faible puissance, surveille un signal spécifique transmis à partir d'une station de base ; et une unité de commande qui, sur la base d'une instruction provenant de la station de base, effectue une commutation entre une opération pour surveiller en continu le signal spécifique et une opération pour surveiller périodiquement le signal spécifique.
PCT/JP2022/036612 2022-09-29 2022-09-29 Terminal, station de base et procédé de communication WO2024069907A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170332327A1 (en) * 2016-05-10 2017-11-16 Zte Corporation Low power receiver for wireless communication
US20200029302A1 (en) * 2017-03-24 2020-01-23 Intel Corporation And Intel Ip Corporation Wake up signal for machine type communication and narrowband-internet-of-things devices
JP2022531942A (ja) * 2019-05-10 2022-07-12 ノキア テクノロジーズ オサケユイチア ウェイクアップ信号監視指示

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170332327A1 (en) * 2016-05-10 2017-11-16 Zte Corporation Low power receiver for wireless communication
US20200029302A1 (en) * 2017-03-24 2020-01-23 Intel Corporation And Intel Ip Corporation Wake up signal for machine type communication and narrowband-internet-of-things devices
JP2022531942A (ja) * 2019-05-10 2022-07-12 ノキア テクノロジーズ オサケユイチア ウェイクアップ信号監視指示

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