WO2024069902A1 - 端末、基地局及び通信方法 - Google Patents

端末、基地局及び通信方法 Download PDF

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Publication number
WO2024069902A1
WO2024069902A1 PCT/JP2022/036607 JP2022036607W WO2024069902A1 WO 2024069902 A1 WO2024069902 A1 WO 2024069902A1 JP 2022036607 W JP2022036607 W JP 2022036607W WO 2024069902 A1 WO2024069902 A1 WO 2024069902A1
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WO
WIPO (PCT)
Prior art keywords
positioning
terminal
measurement
base station
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
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PCT/JP2022/036607
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English (en)
French (fr)
Japanese (ja)
Inventor
康介 島
大樹 武田
真哉 岡村
浩樹 原田
春陽 越後
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NTT Docomo Inc
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NTT Docomo Inc
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Publication date
Application filed by NTT Docomo Inc filed Critical NTT Docomo Inc
Priority to JP2024549004A priority Critical patent/JPWO2024069902A1/ja
Priority to PCT/JP2022/036607 priority patent/WO2024069902A1/ja
Publication of WO2024069902A1 publication Critical patent/WO2024069902A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • 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

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).
  • NR Release 18 is expected to discuss improving positioning accuracy for reduced capability (RedCap) terminals.
  • the maximum bandwidth of a normal terminal is 100 MHz in FR1 and 400 MHz in FR2, while the maximum bandwidth of a restricted capability terminal will be limited to 20 MHz in FR1 and 100 MHz in FR2.
  • the number of antennas on a normal terminal is two, the number of antennas on a restricted capability terminal will be limited to one.
  • positioning that does not use a positioning reference signal (PRS: Positioning Reference Signal/SRS: Sounding Reference Signal for positioning) may be considered from the viewpoint of reducing implementation costs and simplifying hardware configuration.
  • PRS Positioning Reference Signal/SRS: Sounding Reference Signal for positioning
  • SSB Synchronization Signal Block
  • CSI-RS Channel Status Information - Reference Signal
  • TRS tracking reference signal
  • the present invention has been made in consideration of the above points, and aims to realize positioning using downlink signals other than positioning reference signals.
  • the disclosed technology provides a terminal that includes a receiver that receives information indicating a measurement gap for positioning using a downlink signal other than a positioning reference signal via a downlink, and a controller that performs positioning using the downlink signal other than a positioning reference signal in the measurement gap.
  • the disclosed technology provides technology that makes it possible to realize positioning using downlink signals other than positioning reference signals.
  • FIG. 1 is a diagram for explaining a wireless communication system according to an embodiment of the present invention.
  • FIG. 1 is a diagram showing an example of a conventional measurement specification.
  • FIG. 4 is a first diagram showing an example of setting a gap pattern according to the embodiment of the present invention.
  • FIG. 11 is a second diagram showing an example of setting a gap pattern according to the embodiment of the present invention.
  • 7A and 7B are diagrams illustrating an example of setting the application timing of a gap pattern according to an embodiment of the present invention.
  • FIG. 11 is a diagram illustrating an example of setting the time ratio of a plurality of measurements within a measurement gap time according to the first embodiment of the present invention.
  • FIG. 11 is a diagram showing an example of setting priorities of a plurality of measurements according to the second embodiment of the present invention.
  • FIG. 11 is a diagram showing an example of measurement settings that enable simultaneous measurements according to Example 2 of an embodiment of the present invention.
  • FIG. 11 is a diagram showing an example of setting operation restrictions according to the second embodiment of the present invention.
  • FIG. 11 is a diagram showing an example of option 1 of a method for defining the range of influence of measurement in accordance with a third embodiment of the present invention.
  • FIG. 13 is a diagram showing an example of option 2 of a method for defining the range of influence of measurement in accordance with Example 3 of an embodiment of the present invention.
  • FIG. 11 is a first diagram showing an example of setting priority levels according to the third embodiment of the present invention;
  • FIG. 13 is a second diagram showing an example of setting priority levels according to the third embodiment of the present invention.
  • FIG. 11 is a first diagram showing an example of a combination of a plurality of measurements according to Example 4 of an embodiment of the present invention.
  • FIG. 11 is a second diagram showing an example of a combination of a plurality of measurements according to the fourth embodiment of the present invention.
  • FIG. 13 is a diagram showing an example of signal switching according to the fourth embodiment of the present invention.
  • FIG. 2 is a diagram illustrating an example of a functional configuration of a base station according to an embodiment of the present invention.
  • FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal according to an embodiment of the present invention.
  • FIG. 2 is a diagram illustrating an example of a hardware configuration of a base station or a terminal according to an embodiment of the present invention.
  • 1 is a diagram showing an example of a configuration of a vehicle according to an embodiment of the present invention.
  • LTE Long Term Evolution
  • NR NR
  • SS Synchronization signal
  • PSS Primary SS
  • SSS Secondary SS
  • PBCH Physical broadcast channel
  • PRACH Physical random access channel
  • PDCCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Shared Channel
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • NR corresponds to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc.
  • NR- even if a signal is used in NR, it is not necessarily specified as "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.
  • radio parameters and the like when radio parameters and the like are “configured,” this may mean that predetermined values are pre-configured, or that radio parameters notified from the base station 10 or the terminal 20 are configured.
  • FIG. 1 is a diagram for explaining a wireless communication system according to an embodiment of the present invention.
  • a wireless communication system according to an 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 a plurality of each.
  • the base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20.
  • the physical resources of the 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 TTI Transmission Time Interval
  • the time domain may be a slot, or the TTI may be a subframe.
  • the base station 10 transmits a synchronization signal and system information to the terminal 20.
  • the synchronization 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 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 are capable of applying communication by MIMO (Multiple Input Multiple Output) 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) by CA (Carrier Aggregation).
  • SCell Secondary Cell
  • PCell Primary Cell
  • 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).
  • DC Direct Connectivity
  • the terminal 20 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable terminal, or a communication module for M2M (Machine-to-Machine). 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 propagation path quality based on the reception results of the reference signals.
  • the terminal 20 may be referred to as a UE, and the base station 10 as a gNB.
  • the improvement of the positioning accuracy for reduced capability (RedCap) terminals is expected to be discussed.
  • the maximum bandwidth of a normal terminal is 100 MHz in FR1 and 400 MHz in FR2, whereas the maximum bandwidth of a restricted terminal is limited to 20 MHz in FR1 and 100 MHz in FR2.
  • the number of antennas of a normal terminal is two, whereas the number of antennas of a restricted terminal is limited to one.
  • PRS Positioning Reference Signal/SRS: Sounding Reference Signal for positioning
  • Figure 2 shows an example of regulations for conventional measurements.
  • positioning reference signals are mandatory for all methods except UL-TDOA (Uplink - Time Difference of Arrival) and UL-AoA (Uplink - Angle of Arrival).
  • ECID Enhanced Cell ID
  • TA Transmission Advance
  • RSRP Reference Signal Received Power
  • RSRQ Reference Signal Received Quality
  • a synchronization signal block SSB
  • CSI-RS channel status information reference signal
  • TRS tracking reference signal
  • MG measurement gap
  • the terminal 20 may assume that a measurement gap (MG: Measurement Gap) for positioning using SSB/CSI-RS/TRS is defined, and that the measurement gap is set or instructed by the base station 10.
  • MG Measurement Gap
  • Positioning may be a measurement for estimating the position of the terminal 20.
  • the positioning in question may be, for example, a timing measurement such as time of arrival (ToA) or reference signal time difference of arrival (RSTD) or an angle measurement such as downlink - angle of departure (DL-AoD).
  • the operation during measurement may be specified separately for timing measurement and angle measurement.
  • the terminal 20 may assume that terminal capability information for measurement gaps as follows is defined, and that measurement gaps are set and measurement operations are instructed by the base station 10 based on the terminal capability information.
  • -Settable gap patterns (gap setting unit (per terminal/per FR), gap length, gap cycle) Transmission type of SSB/CSI-RS/TRS used for positioning (e.g. periodic/semi-periodic/aperiodic) Whether positioning using SSB/CSI-RS/TRS and other measurements can be performed simultaneously; Extended measurement gap length that can be supported when performing simultaneous measurements; Support for priority between positioning using SSB/CSI-RS/TRS and other measurements or reception of downlink signals; Support for priority between positioning using SSB/CSI-RS/TRS and transmission of uplink signals
  • the terminal 20 may assume that a measurement gap is set for each terminal 20 or for each FR.
  • the terminal 20 may assume that different measurement gap lengths are defined within a frequency band, between frequency bands, or between RATs (Radio Access Technologies).
  • the terminal 20 may assume that the gap pattern is specified in advance in a table or the like. For example, the terminal 20 may assume that a new gap pattern is added for positioning using SSB/CSI-RS/TRS.
  • FIG. 3 is a first diagram showing an example of setting a gap pattern according to the embodiment of the present invention.
  • the terminal 20 may assume that the application timing of each gap pattern is specified in advance in a table or the like.
  • FIG. 5 is a diagram showing an example of setting the application timing of a gap pattern according to an embodiment of the present invention.
  • the terminal 20 may assume a specification such as the table shown in FIG. 5, and the application timing of a gap pattern for positioning may be added to the table.
  • the terminal 20 may assume that an addition is made to a table specified in the conventional specifications, or that a new table is defined for NR Release 18.
  • a default measurement gap is defined and the terminal 20 does not support positioning measurement gaps, it may assume that it will perform measurements using the defined default measurement gap.
  • Example 1 In this embodiment, an example will be described in which positioning using SSB/CSI-RS/TRS and measurements other than positioning are set.
  • a terminal 20 capable of simultaneously performing positioning using SSB/CSI-RS/TRS and measurements other than positioning may be assumed to perform multiple measurement operations including positioning and measurements other than positioning during a single measurement gap.
  • the terminal 20 may assume that a measurement gap is shared among multiple measurement operations in the following situation.
  • a terminal 20 in which a measurement gap is set for each terminal requests setting of a measurement gap for measurement within a frequency band or between frequency bands, or when an SSB-based RRM Measurement Timing Configuration (SMTC) measurement window set for measurement overlaps with a measurement gap
  • SMTC Measurement Timing Configuration
  • a terminal 20 in which a measurement gap is set for each FR requests setting of a measurement gap for measurement within a frequency band, or when a measurement window set for measurement overlaps with a measurement gap
  • a terminal 20 in which a measurement gap is set for each FR requests setting of a measurement gap for measurement between frequency bands and has the ability to set measurements between frequency bands, or when a measurement window set for measurement overlaps with a measurement gap for each FR
  • the terminal 20 may assume that the proportion of time each of multiple measurements taken within a single measurement gap occupies within the measurement gap is defined.
  • FIG. 6 is a diagram showing an example of setting the time ratio of multiple measurements within a measurement gap time according to Example 1 of an embodiment of the present invention.
  • the terminal 20 may assume that the measurement implementation ratio is set or specified by the base station 10. For example, when positioning using SSB902 and RLM (Radio Link Monitoring) using CSI-RS903 can be performed simultaneously, the terminal 20 may assume that the base station 10 sets or specifies that the time ratio that positioning using SSB902 and RLM (Radio Link Monitoring) using CSI-RS903 occupy within the measurement gap 901 is 1:1.
  • the terminal 20 may also assume that a measurement gap longer than a single measurement is set or specified.
  • the terminal 20 may assume that a measurement gap of the following length is set or specified:
  • the terminal 20 may assume that the table shown in FIG. 3 or FIG. 4 described above already includes a gap length that assumes sharing of the measurement gap.
  • the terminal 20 may assume that an extension of the gap length is defined separately, and that the base station 10 instructs the terminal 20 to select a measurement gap to be used from the defined extension.
  • the extension may be in milliseconds or frame length units, or may be defined as an extension rate (magnification factor).
  • terminal capability information that the terminal 20 can support may be defined.
  • the terminal 20 may assume that the measurement gap length is determined taking into account the types of measurements that are set at the same time.
  • Example 2 In this embodiment, an example will be described in which restrictions are defined for positioning and other measurements or reception of downlink signals using SSB/CSI-RS/TRS.
  • the terminal 20 may assume that restrictions are defined for positioning and other measurements or reception of downlink signals using SSB/CSI-RS/TRS.
  • the terminal 20 may assume that if priorities are set and the timing (OFDM symbols) of positioning using SSB/CSI-RS/TRS overlaps with measurements other than positioning using SSB/CSI-RS/TRS or reception of downlink signals, one of the measurements or reception of downlink signals will be restricted according to the set priority.
  • the terminal 20 may not necessarily assume that the timings completely overlap, but may assume that the other measurement or reception is affected, including gaps before and after the measurements. For example, the terminal 20 may determine that the other measurement or reception is subject to restriction when it occurs within the range of the measurement gap set for positioning, or may determine that the other measurement or reception is subject to restriction when it occurs within X (symbols/milliseconds) from the first or last symbol of the measurement gap, even if it is outside the range of the measurement gap set for positioning. The terminal 20 may also determine that the other measurement or reception is subject to restriction when it occurs within X (symbols/milliseconds) from the reception of the SSB/CSI-RS/TRS for positioning.
  • the reception of a downlink signal may be, for example, the reception of a PDCCH or a PDSCH.
  • the terminal 20 may assume that the measurement priority is specified in the specifications, that a default operation is specified in the specifications, that the measurement priority is instructed each time by the base station 10, or that it depends on the implementation of the terminal.
  • the terminal 20 may also assume that it receives setting information indicating the measurement priority from the base station 10, and uses the setting value if the received setting information includes a setting value, and uses a fixed value or a calculation formula specified in the specifications if no setting information is received or if the received setting information does not include a setting value.
  • the terminal 20 may assume the following combination of priorities: ⁇ Downlink positioning priority ⁇ Downlink measurement (other than positioning) priority ⁇ Downlink signal reception priority
  • FIG. 7 is a diagram showing an example of setting priorities for multiple measurements according to a second embodiment of the present invention.
  • FIG. 7 shows a case where positioning by SSB902 is set to a higher priority than RLM by CSI-RS903.
  • the terminal 20 may cancel the RLM by CSI-RS903.
  • the terminal 20 may assume that the operational restrictions are set for each of the following cases, for example, or for each of the following combinations.
  • Presence or absence of terminal capability information e.g. "simultaneousRxDataSSB-DiffNumerology"
  • FR frequency band
  • Distinguishing whether the SCS is the same or a certain distance away e.g. "simultaneousRxDataSSB-DiffNumerology”
  • FR frequency band
  • PRB Physical Resource Block
  • RLM Physical Resource Block
  • BFD Beam Failure Detection
  • CBD Candidate Beam Detection
  • L1-RSRP measurement etc.
  • By signal reception type PDSCH/PDCCH
  • the terminal 20 may assume that restrictions are relaxed when simultaneous measurements are possible.
  • FIG. 8 is a diagram showing an example of measurement settings that allow simultaneous measurement according to the second embodiment of the present invention.
  • the terminal 20 can simultaneously measure positioning using SSB902 and RLM using CSI-RS903
  • the positioning using SSB902 and RLM using CSI-RS903 may be included within the same measurement gap 901.
  • FIG. 9 is a diagram showing an example of the setting of operational restrictions in Example 2 of an embodiment of the present invention.
  • the restrictions when positioning by SSB and RLM by CSI-RS overlap may be as follows. In the case of FR2, the restrictions may be such that one of them is measured and the other measurement is canceled.
  • the restriction may be such that if the SCS of the two positioning measurements are the same, there is no restriction, if the SCS are different and the terminal capability information indicates that simultaneous measurements are possible, there is no restriction, and in all other cases, one of the measurements is measured and the other measurement is canceled.
  • This embodiment makes it possible to clarify the restrictions when positioning and other measurements are set simultaneously.
  • Example 3 In this embodiment, an example will be described in which restrictions are defined for positioning and uplink signal transmission using SSB/CSI-RS/TRS.
  • priorities are set, and if the positioning using SSB/CSI-RS/TRS and the transmission timing (OFDM symbol) of the uplink signal overlap, it may be assumed that one operation is restricted according to the set priority.
  • the terminal 20 does not necessarily assume that the timings completely overlap, but may assume that the operation of the other is affected, including gaps before and after measurement or transmission.
  • the terminal 20 may determine that the other operation is subject to restriction when it is within a range of X (symbols/milliseconds) from the first or last symbol of the measurement gap even if it is outside the range of the measurement gap set for positioning.
  • the terminal 20 may also determine that the other measurement or transmission is subject to restriction when it is within a range of X (symbols/milliseconds) from the reception of the SSB/CSI-RS/TRS for positioning.
  • FIG. 10 shows an example of option 1 for the method of defining the range of influence of measurements in embodiment 3 of the present invention.
  • the affected range may be defined as a length in the time direction from the beginning or end of the measurement gap 901.
  • an affected range 904 is defined as a combination of a range of X1 (symbols/milliseconds) from the beginning of the measurement gap 901 and a range of X2 (symbols/milliseconds) from the end of the measurement gap 901.
  • an influence range 904 is defined as a combination of a range of X1 (symbols/millisecond) from the beginning of the measurement gap 901 and a range of X2 (symbols/millisecond) from the beginning of the measurement gap 901.
  • the range of influence may also be defined as the length of time from the time of reception of SSB902.
  • Y symbols/millisecond
  • FIG. 11 is a diagram showing an example of option 2 for specifying the range of influence of measurements in embodiment 3 of the present invention.
  • the affected range may be defined by the length in the time direction from the beginning or end of the measurement gap 901.
  • a range 905 according to the terminal capability is defined by combining a range of a minimum gap value Y1 (symbols/millisecond) from the beginning of the measurement gap 901 according to the terminal capability and a range of Y2 (symbols/millisecond) from the end of the measurement gap 901.
  • a range 905 according to the terminal capability is defined, which is a combination of a range of a minimum gap value Y1 (symbols/millisecond) from the beginning of the measurement gap 901 according to the terminal capability and a range of Y2 (symbols/millisecond) from the beginning of the measurement gap 901.
  • the range of influence may also be defined as the length of time from the time of reception of SSB902.
  • the terminal 20 may determine that the other operation (measurement or transmission) is subject to restriction when the other operation is within the range of a measurement gap set for positioning.
  • the transmission of the uplink signal may be, for example, the transmission of PUCCH/PUSCH/SRS (including SRS for positioning).
  • the terminal 20 may assume that the measurement priority is specified in the specifications, that a default operation is specified in the specifications, that the measurement priority is instructed each time by the base station 10, or that it depends on the implementation of the terminal.
  • the terminal 20 may also assume that it receives setting information indicating the measurement priority from the base station 10, and uses the setting value if the received setting information includes a setting value, and uses a fixed value or a calculation formula specified in the specifications if no setting information is received or if the received setting information does not include a setting value.
  • the terminal 20 may assume the following combination of priorities: ⁇ Uplink transmission priority ⁇ Downlink positioning priority
  • FIG. 12 is a first diagram showing an example of setting priority levels according to the third embodiment of the present invention.
  • FIG. 12 shows a case where positioning using a downlink signal (e.g., SSB902) is set to a higher priority than transmission of an uplink signal (e.g., SRS905).
  • a downlink signal e.g., SSB902
  • SRS905 uplink signal
  • the terminal 20 may cancel the transmission of the uplink signal including SRS905, or drop SRS905 from the transmission targets.
  • FIG. 13 is a second diagram showing an example of setting priority according to the third embodiment of the present invention.
  • FIG. 13 shows a case where the transmission of an uplink signal (e.g., SRS 905) is set to a higher priority than positioning using a downlink signal (e.g., SSB 902).
  • an uplink signal e.g., SRS 905
  • a downlink signal e.g., SSB 902
  • the terminal 20 may count the measurement gap setting period assuming that a measurement gap has been set at that timing, and may assume that the next measurement gap is set.
  • the terminal 20 may assume that the operational restrictions are set for each of the following cases, for example, or for each of the following combinations.
  • Presence or absence of terminal capability information e.g. "simultaneousRxDataSSB-DiffNumerology”
  • FR frequency band
  • PRB Physical Resource Block
  • PRB Physical Resource Block
  • RLM Location purpose other than positioning
  • BFD Beam Failure Detection
  • CBD Candidate Beam Detection
  • L1-RSRP measurement etc.
  • By signal transmission type PUCCH/PUSCH/SRS
  • Example 4 In this embodiment, an example will be described in which the terminal 20 performs positioning by combining a plurality of signals including SSB/CSI-RS/TRS.
  • the terminal 20 may perform positioning using multiple signals simultaneously (or with a small time gap) in overlapping periods.
  • the terminal 20 may use a measurement gap common to the multiple signals, or may use a measurement gap that is set separately for each signal.
  • FIG. 14 is a first diagram showing an example of a combination of multiple measurements according to the fourth embodiment of the present invention.
  • FIG. 14 shows an example in which the terminal 20 uses a common measurement gap 901 to perform positioning using SSB 902 and CSI-RS 906 simultaneously (or with a small time gap between them).
  • FIG. 15 is a second diagram showing an example of a combination of multiple measurements according to the fourth embodiment of the present invention.
  • FIG. 15 shows an example in which the terminal 20 uses separate measurement gaps 901 to perform positioning using SSB 902 and CSI-RS 906 simultaneously (or with a small time gap between them).
  • the terminal 20 may assume that multiple signals are configured for positioning, and may assume that the base station 10 instructs it which signal to use from among the multiple configured signals.
  • the terminal 20 may assume that the base station 10 instructs it to switch when the reception condition (e.g., RSRP, RSRQ) of one of the signals deteriorates or improves.
  • the reception condition e.g., RSRP, RSRQ
  • a threshold value for determining whether to switch signals may be specified in the specifications.
  • the terminal 20 may be assumed to be instructed by the base station 10 to switch, taking into consideration the relationship with the reference signal set for measurement purposes other than positioning. For example, if the terminal 20 has been using CSI-RS for positioning, but wishes to use it for purposes such as RLM, BFD, or CBD, the terminal 20 may be assumed to be instructed by the base station 10 to stop positioning using CSI-RS and change to positioning using another signal (e.g., SSB) based on a decision made by the base station 10.
  • CSI-RS for positioning
  • SSB another signal
  • FIG. 16 is a diagram showing an example of signal switching according to the fourth embodiment of the present invention.
  • the terminal 20 receives an instruction to switch positioning signals from the base station 10 and switches from positioning using CSI-RS 906 to positioning using SSB 902.
  • the terminal 20 may be configured to use separate signals for timing measurement and angle measurement, depending on the measurement metric.
  • the terminal 20 may report the measurement results of multiple types of signals to the base station 10 under the following conditions, and the positioning calculation may be assumed to be performed by the base station 10 (or other network node).
  • the terminal 20 may assume that it is instructed to report only the top X signal measurement results according to the priority of the signal types to be reported. In that case, the terminal 20 may assume one of the following options:
  • the terminal 20 may assume that the priority is predefined in the specifications.
  • X may be defined as the terminal capability information.
  • the terminal 20 will report only the measurement results of SSB, which has the highest priority.
  • the terminal 20 may take one of the following optional actions:
  • the terminal 20 may report the measurement values separately for each signal.
  • the terminal 20 may report the measurement values in an integrated state. For example, the terminal 20 may assume a statistical calculation such as an average or a weighted average according to the measurement ratio as a method of integration. The terminal 20 may also report the measurement ratio of the signal together with the statistical value.
  • the terminal 20 may be assumed to report the type of signal used as information regarding positioning accuracy to the base station 10 along with the measurement result (UE-assisted) and the positioning result (UE-based).
  • the type of signal reported may be SS-RSRP/CSI-RSRP/TRS-RSRP, or SS-RSTD/CSI-RSTD/TRS-RSTD, etc.
  • PRS Positioning Reference Signal
  • DL-PRS DL-PRS
  • UL-PRS e.g., SRS for positioning, SRS
  • SRS may be interpreted as “SRS for MIMO” or “SRS for positioning.”
  • SSB SS/PBCH block
  • the base station 10 may be interpreted as a network, a core network, a network node, a "TRP", an "LMF”, etc.
  • ServerTRP may be read as “referenceTRP”, etc.
  • Non-serving TRP may be interpreted as “neighbor TRP”, etc.
  • Configured or instructed by the base station 10 may be read as “configured/activated/indicated by the base station 10 via RRC/MAC-CE/DCI.”
  • Fig. 17 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. 17 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 LBT.
  • 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. 18 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. 18 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 120 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 by the receiving unit 220 from the base station 10 or other terminals 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 also includes a function for performing LBT.
  • the terminal of this embodiment may be configured as a terminal as shown in each of the following items.
  • the following communication methods may be implemented.
  • the terminal according to claim 1. The control unit performs positioning by combining a plurality of types of signals among the downlink signals other than the positioning reference signal. 2.
  • the terminal according to claim 1. (Section 5) a transmitter that transmits, to a terminal, information indicating a measurement gap for positioning using a downlink signal other than the positioning reference signal; and a control unit that assumes that the terminal performs positioning using the downlink signal other than a positioning reference signal in the measurement gap. base station.
  • (Section 6) receiving information indicating a positioning measurement gap using a downlink signal other than a positioning reference signal on a downlink; and performing positioning using the downlink signal other than a positioning reference signal in the measurement gap.
  • the communication method implemented by the device.
  • any of the above configurations provide a technique that enables positioning using a downlink signal other than the positioning reference signal.
  • information indicating a measurement gap is received via downlink, and positioning using a downlink signal other than the positioning reference signal can be performed in the measurement gap.
  • positioning using a downlink signal other than the positioning reference signal and measurements other than positioning can be performed in the same measurement gap.
  • positioning can be performed by combining multiple types of downlink signals other than the positioning reference signal.
  • 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 block 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. 19 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. 17 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. 18 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 referred to as, 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
  • the transmitting/receiving antenna, an amplifier unit, a transmitting/receiving unit, a transmission path interface, etc. may be realized by the communication device 1004.
  • the transmitting/receiving unit may be implemented as a transmitting unit or a receiving unit that is physically or logically separated.
  • 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.
  • FIG. 20 shows an example configuration of a 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.
  • a communication device mounted on the vehicle 2001 may be applied to the communication module 2013, for example.
  • 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 external devices via the communication module 2013, etc., 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 2021-2029 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 2021-2029, 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 external devices in memory 2032 that can be used by the microprocessor 2031. Based on the information stored in memory 2032, 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, and the like provided on 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 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 is a mobile communication system that is compatible with 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 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 of LTE and LTE-A with 5G, etc.).
  • 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 user terminal.
  • each aspect/embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a user 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 terminal-to-terminal communication (for example, "side").
  • the uplink channel, downlink channel, etc. may be read as a side channel.
  • the user terminal in this disclosure may be interpreted as a base station.
  • the base station may be configured to have the functions of the user 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)
  • TTI Transmission Time Interval
  • multiple consecutive subframes may be called a TTI
  • one slot or one minislot may be called a TTI.
  • at least one of 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.
  • 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 within one carrier for the terminal 20.
  • At least one of the configured BWPs may be active, and the terminal 20 may not be expected to transmit or receive a specific signal/channel outside the active BWP.
  • BWP bit stream
  • 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)
  • Mobile Radio Communication Systems (AREA)
PCT/JP2022/036607 2022-09-29 2022-09-29 端末、基地局及び通信方法 Ceased WO2024069902A1 (ja)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021061387A1 (en) * 2019-09-25 2021-04-01 Qualcomm Incorporated Positioning in networks with frequency reuse
US20210120517A1 (en) * 2019-10-18 2021-04-22 Qualcomm Incorporated Integrated access backhaul (iab) node positioning
WO2022030488A1 (ja) * 2020-08-05 2022-02-10 三菱電機株式会社 通信システムおよび基地局

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
WO2021061387A1 (en) * 2019-09-25 2021-04-01 Qualcomm Incorporated Positioning in networks with frequency reuse
US20210120517A1 (en) * 2019-10-18 2021-04-22 Qualcomm Incorporated Integrated access backhaul (iab) node positioning
WO2022030488A1 (ja) * 2020-08-05 2022-02-10 三菱電機株式会社 通信システムおよび基地局

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NTT DOCOMO, INC.: "Discussion on positioning for RedCap UEs", 3GPP TSG RAN WG1 #110B-E R1-2209911, 30 September 2022 (2022-09-30), XP052259384 *
QUALCOMM INCORPORATED: "Positioning for Reduced Capabilities UEs", 3GPP TSG RAN WG1 #110 R1-2207242, 12 August 2022 (2022-08-12), XP052275178 *

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