WO2024232098A1 - 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
WO2024232098A1
WO2024232098A1 PCT/JP2023/017810 JP2023017810W WO2024232098A1 WO 2024232098 A1 WO2024232098 A1 WO 2024232098A1 JP 2023017810 W JP2023017810 W JP 2023017810W WO 2024232098 A1 WO2024232098 A1 WO 2024232098A1
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WO
WIPO (PCT)
Prior art keywords
terminal
ppw
information
base station
aggregation
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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
Application number
PCT/JP2023/017810
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English (en)
French (fr)
Japanese (ja)
Inventor
真哉 岡村
大樹 武田
康介 島
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 PCT/JP2023/017810 priority Critical patent/WO2024232098A1/ja
Priority to JP2025519297A priority patent/JPWO2024232098A1/ja
Publication of WO2024232098A1 publication Critical patent/WO2024232098A1/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
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA

Definitions

  • the present invention relates to positioning technology in wireless communication systems.
  • 3GPP registered trademark
  • 3rd Generation Partnership Project 3rd Generation Partnership Project
  • 5G Fifth Generation Partnership Project
  • NR New Radio
  • 5G various wireless technologies and network architectures are being studied to meet the requirements of achieving a throughput of 10 Gbps or more while keeping latency in wireless sections to 1 ms or less.
  • NR Positioning which performs positioning using reference signals, etc.
  • Rel-17 NR positioning supports MG (Measurement Gap)-less positioning.
  • MG-less positioning a PPW (PRS Processing Window) is set in advance, and the terminal receives DL-PRS within the PPW.
  • BW aggregation for positioning for Rel-18 NR positioning.
  • BW aggregation for positioning combines the PRS measurement results for each PFL (frequency domain) in multiple PFLs (Positioning Frequency Layers) to calculate the terminal position using broadband resources. This can improve positioning accuracy.
  • the present invention has been made in consideration of the above points, and aims to provide a technology that enables a terminal to properly receive a reference signal for positioning using multiple windows in multiple frequency domains.
  • a receiver that receives information relating a plurality of windows in a plurality of frequency domains from a network; and a control unit that assumes receiving a reference signal for positioning by using the multiple windows in the multiple frequency regions based on the information.
  • the disclosed technology provides a technology that enables a terminal to properly receive a reference signal for positioning using multiple windows in multiple frequency domains.
  • 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. 1 is a diagram showing a configuration in which multiple base stations exist.
  • FIG. 1 is a diagram illustrating an example of a basic operation of a communication system.
  • FIG. 1 is a diagram for explaining the first embodiment.
  • FIG. 1 is a diagram for explaining the first embodiment.
  • FIG. 11 is a diagram for explaining a second embodiment.
  • FIG. 11 is a diagram for explaining a second embodiment.
  • 13 is an example of a sequence for reporting capability information.
  • FIG. 2 is a diagram illustrating an example of a functional configuration of a base station 10 and an LMF 30 according to an embodiment of the present invention.
  • FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal 20 according to an embodiment of the present invention.
  • FIG. 1 illustrates an example of a vehicle.
  • FIG. 1 is a diagram for explaining 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.
  • the core network is provided with an LMF 30, and is capable of communicating with the base station 10.
  • the LMF 30 may communicate with the base station 10 via an AMF.
  • the LMF 30 is an example of a network device.
  • the base station 10 is also an example of a network device.
  • the LMF 30 may also be called a management device.
  • FIG. 1 shows one base station 10 and one terminal 20, this is an example and there may be multiple of each.
  • One, more than one, or all of the multiple base stations 10 may be airborne devices (e.g., satellites, HAPS).
  • the source of a DL-PRS may be called a TRP (transmission reception point).
  • a TRP may be called a transmission point or a reception point.
  • a TRP may be called a base station.
  • 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 symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks.
  • the TTI (Transmission Time Interval) in the time domain may be a slot, or the TTI may be a subframe. Note that a cell and a CC may be considered synonymous.
  • the base station 10 is capable of performing carrier aggregation, which bundles multiple cells (multiple CCs (component carriers)) together to communicate with the terminal 20.
  • carrier aggregation one PCell (primary cell) and one or more SCells (secondary cells) are used.
  • the base station 10 transmits a synchronization signal, system information, etc. 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 or PDSCH, and is also called broadcast information.
  • the base station 10 transmits a control signal or data to the terminal 20 by DL (Downlink), and receives a control signal or data from the terminal 20 by UL (Uplink).
  • the signals transmitted by control channels such as PUCCH and PDCCH are called control signals
  • the signals transmitted by shared channels such as PUSCH and PDSCH are called data, but these names are merely examples.
  • UCI Uplink Control Information
  • PUCCH or PUSCH Uplink Control Information
  • the terminal 20 is a communication device equipped with wireless communication functions, such as a smartphone, mobile phone, tablet, wearable terminal, M2M (Machine-to-Machine) communication module, etc. 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 may be referred to as a UE, and the base station 10 may be referred to as a gNB.
  • the terminal 20 and the base station 10 are also equipped with a positioning function using BW aggregation.
  • 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.
  • LMF (Location Management Function) 30 is a function (device) responsible for communication control related to the location information service defined in 5GC.
  • LMF 30 may be called a location management server, a location management device, or a management device.
  • LMF 30 can receive, for example, measurement results (phase, received power, time difference, angle, etc.) of a reference signal from terminal 20 or base station 10, and calculate the position of terminal 20.
  • LMF 30 can also provide setting information or control information related to positioning to terminal 20 and base station 10.
  • 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 an MN (Master Node) and a base station 10B serving as an SN (Secondary Node) are provided.
  • Base station 10A and base station 10B are each connected to a core network 40.
  • 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
  • MCG Master Cell Group
  • SCG Secondary Cell Group
  • the MCG is composed of one PCell and one or more SCells
  • the SCG is composed of one PSCell (Primary SCell) and one or more SCells.
  • FIG. 3 shows an example in which the terminal 20 performs positioning by receiving reference signals from multiple base stations 10A to 10C. For example, the position of the terminal 20 can be found by determining the distance (or angle) between the terminal 20 and multiple base stations.
  • the distance between the terminal 20 and the base station can be calculated, for example, from the arrival time of the signal or the wave number (wave number x wavelength) of the signal's carrier wave.
  • BW aggregation for positioning By combining the PRS measurement results of each PFL in multiple PFLs, it is possible to calculate the terminal position using broadband resources, thereby improving positioning accuracy. In this way, aggregating multiple PFLs (multiple bandwidths) to perform positioning calculations is called BW aggregation for positioning.
  • the motivation for BW aggregation for positioning is to improve positioning accuracy by combining multiple PFLs as described above.
  • BW aggregation In Rel-18 NR positioning (BW aggregation), support for BW aggregation for PRS Rx w/ MG was agreed upon, but discussions for PRS Rx w/o MG (MG-less, w/ PPW) are still ongoing.
  • Rel-17 supports MG (Measurement Gap)-less positioning.
  • MG-less positioning the PPW (PRS Processing Window) is set in advance, and the terminal 20 receives the DL-PRS within the PPW.
  • the PPW is a window that assumes DL-PRS reception outside the MG.
  • PPW configuration information includes, for example, dl-PPW-ID, dl-PPW-PeriodicityAndStartSlot, length, priority, type, and so on (Non-Patent Document 1).
  • dl-PPW-PeriodicityAndStartSlot indicates the period and start slot of the PPW.
  • Length indicates the time length (slot length) of the PPW.
  • Priority indicates the reception priority between the PDCCH/PDSCH/CSI-RS and the PRS.
  • the terminal 20 receives (measures) the DL-PRS without using the MG. For example, up to four PPWs can be set for each DL BWP. For example, in response to a positioning request from the LMF 30 to the base station 10, a maximum of one PPW can be activated for each active DL BWP, and for example, up to a total of four PPWs can be activated for all active DL BWPs.
  • Embodiment 0 (high-level proposal): It is assumed that BW aggregation is applied when the terminal 20 receives DL-PRS via PPW.
  • Embodiment 1 The terminal 20 assumes that the PPW parameters of each PFL for which BW aggregation is configured are different among multiple PFLs.
  • Embodiment 2 The terminal 20 assumes that some PPW parameters are common between multiple PFLs for which BW aggregation is configured.
  • Embodiment 3 The terminal 20 reports capabilities regarding BW aggregation for MG-less positioning to the NW.
  • Embodiment 0 First, a description will be given of embodiment 0. In embodiment 0, it is assumed that BW aggregation is performed when the terminal 20 receives the DL-PRS via the PPW.
  • the base station 10/LMF 30 (base station 10 or LMF 30) generates setting information, and the terminal 20 receives the setting information from the base station 10/LMF 30.
  • the "base station 10/LMF 30" may also be called a network (NW).
  • the configuration information generated and transmitted in S101 is configuration information related to BW aggregation for positioning.
  • Configuration information may also be referred to as instruction information/notification information.
  • Configuration information includes "PPW association,” "PPW configuration for non-BW aggregation/BW aggregation,” and “switching between non-BW aggregation/BW aggregation,” each of which will be explained below. Note that “PFL” below may be replaced with "CC.”
  • BW association In BW aggregation for positioning (which may also be called BW aggregation), the terminal 20 performs PRS measurement with multiple CCs/PFLs. Therefore, in order for the terminal 20 to use a PPW and perform PRS measurement by BW aggregation, in this embodiment, information indicating that multiple PPWs are associated for BW aggregation is configured in the terminal 20 from the base station 10/LMF 30. The fact that multiple PPWs are associated for BW aggregation, or configuration information indicating this, is called a "PPW association.”
  • the PPW association for BW aggregation is set by the base station 10/LMF 30 to the terminal 20 using PPW parameters.
  • the PPW parameters include the DL-PPW-ID.
  • a PPW association is set using the PPW ID (DL-PPW-ID-r17).
  • terminal 20 receives "PPW ID_1 and PPW ID_2" as a PPW association from base station 10/LMF 30.
  • terminal 20 performs BW aggregation of PFL1 and PFL2.
  • terminal 20 performs PRS measurement using the PPW with PPW ID_1 in PFL1, and performs PRS reception (measurement) using the PPW with PPW ID_2 in PFL2.
  • the PPW association for BW aggregation may be set from the base station 10/LMF 30 to the terminal 20 using parameters other than the PPW parameters.
  • the PPW association for BW aggregation may be set from the base station 10/LMF 30 to the terminal 20 using any one, any multiple, or all of the DL-PRS resource set ID, DL-PRS resource ID, and PFL ID.
  • terminal 20 receives "DL-PRS resource set ID_1 and DL-PRS resource set ID_2" as a PPW association from base station 10/LMF 30.
  • terminal 20 performs BW aggregation using a PFL with a PPW of PPW ID_1 configured and a PFL with a PPW of PPW ID_2 configured.
  • ⁇ PPW configuration of non-BW aggregation/BW aggregation> it is basically assumed that BW aggregation is performed, but the terminal 20 may perform PRS positioning using PPW without performing BW aggregation.
  • the setting for PRS positioning using Rel-17 NR positioning is called the "PPW configuration for non-BW aggregation". Note that when non-BW aggregation (i.e. Rel-17 NR positioning) is applied, the DL-PRS reception of each PFL is Based on the results, positioning calculations are performed respectively.
  • a PPW configuration for non-BW aggregation and a PPW configuration for BW aggregation are respectively set from the base station 10/LMF 30 to the terminal 20.
  • the parameters of the PPW configuration for non-BW aggregation and the parameters of the PPW configuration for BW aggregation may be common.
  • the parameters of the PPW configuration for non-BW aggregation and the parameters of the PPW configuration for BW aggregation are common, only the PPW configuration for non-BW aggregation may be set from the base station 10/LMF 30 to the terminal 20 as the PPW configuration.
  • Switching between non-BW aggregation and BW aggregation may be performed.
  • the base station 10/LMF 30 notifies the terminal 20 of enable/disable of BW aggregation by RRC/MAC-CE/DCI/LPP, and the terminal 20 performs the operation of embodiment 1 or 2 described later when it receives the enable notification (when implementing BW aggregation).
  • Embodiment 1 Next, a description will be given of embodiment 1.
  • embodiment 1 it is assumed that the PPW parameters of each PFL in the multiple PFLs for which BW aggregation is set in the terminal 20 are different among the multiple PFLs.
  • terminal 20 assumes that BW aggregation using PFL1 and PFL2 is configured in terminal 20.
  • terminal 20 assumes that the PPW parameters in PFL1 and PFL2 are different.
  • the above BW aggregation settings may be set using the PPW association described in embodiment 0, or may be set using a method other than PPW association.
  • the terminal 20 assumes DL-PRS reception operation of one of the following options (Opt.) 1 to 3.
  • Opt.1 the terminal 20 performs DL-PRS reception in all active PPWs.
  • An example of Opt.1 will be described with reference to Fig. 5.
  • BW aggregation is performed using PFL0 and PFL1.
  • the PPW parameters are different between PPW0 set in PFL0 and PPW1 set in PFL1.
  • the terminal 20 performs PRS reception operation with each PPW according to the settings of each PPW.
  • the DL-PRS priority configured in advance in the PPW may be assumed, or the DL-PRS priority may be interpreted as the lowest.
  • the terminal 20 is more likely not to receive the PRS in the timing of the central window of PPW0, and it is possible to avoid excessive dropping of DL signals other than the DL-PRS at timing when BW aggregation cannot be performed.
  • the terminal 20 receives DL-PRS only in PPWs with timing overlap.
  • the terminal 20 assumes that the granularity of timing overlap is, for example, PPW/slot/symbol.
  • the timing overlap granularity is PPW, which means that if there is even a partial temporal overlap between multiple PPWs, DL-PRS reception is performed in each of those multiple PPWs in that overlapping portion.
  • the timing overlap granularity may be PPW, meaning that DL-PRS reception is performed in each of multiple PPWs when the time positions of the PPWs are completely aligned between the multiple PPWs.
  • timing overlap granularity is slot (or symbol)
  • the PRS slot (or symbol) matches in the overlapping portion, DL-PRS reception is performed in each of the multiple PPWs.
  • PRS reception is performed on both PPW0 and PPW1 in the overlapping portion in time between PPW0 and PPW1.
  • the central window of PPW0 does not overlap at all with the window of PPW1, so terminal 20 drops the PRS in the central window of PPW0.
  • the terminal 20 may execute either Opt.1 or Opt.2, which may be specified in the specifications, or may be instructed by the base station 10/LMF 30 to the terminal 20 by RRC/MAC-CE/DCI/LPP. This instruction can realize switching from Opt.1 to Opt.2 or switching from Opt.2 to Opt.1.
  • Embodiment 2 Next, a description will be given of embodiment 2.
  • the terminal 20 has some PPW parameters in common among a plurality of PFLs for which BW aggregation is set.
  • the PPW parameters common to multiple PFLs are, for example, one or more of the following: PPW length, PPW periodicity, PPW start slot, DL-PRS priority, and PPW type.
  • PPW parameters common to multiple PPWs for which BW aggregation is performed are notified from the base station 10/LMF 30 to the terminal 20 by RRC/MAC-CE/DCI/LPP.
  • PPW0 is set to PFL0 and PPW1 is set to PFL1.
  • PPW length and PPW periodicity are the same between PPW0 and PPW1.
  • the base station 10/LMF 30 notifies the terminal 20 of configuration information (configuration information for PPW0 and PPW1) including one PPW length and one PPW periodicity via RRC/MAC-CE/DCI/LPP.
  • the terminal 20 applies the PPW length and the PPW periodicity to each of PPW0 and PPW1.
  • the terminal 20 reads the parameters set in each PPW in the multiple PPWs for which BW aggregation is performed, and assumes PPW parameters common to the multiple PPWs.
  • the terminal 20 assumes that the PPW to be read and referenced (here, referred to as the reference PPW) is uniquely defined in the specifications.
  • the terminal 20 sets the parameters set in the reference PPW as common PPW parameters, and uses these parameters for all PPWs that are aggregated in the BW.
  • the common PPW parameters may be a part or all of the parameters set in the reference PPW.
  • the terminal 20 sets the PPW with the smallest (or largest) PPW ID as the reference PPW.
  • the terminal 20 may, for example, use as the reference PPW the PPW set to the PFL with the smallest (or largest) PFL ID among multiple PFLs for which BW aggregation is performed.
  • the terminal 20 may, for example, set the PPW that is set to the PFL with the smallest (or largest) SCS among multiple PFLs for which BW aggregation is performed as the reference PPW.
  • a specific ID may be used to specify the reference PPW. This ID is referred to as the "specific ID.”
  • the terminal 20 may, for example, set as the reference PPW a PPW set for a PFL whose SCS is a specific value among multiple PFLs for which BW aggregation is performed.
  • any of the above-mentioned methods for determining the reference PPW may be specified in the specifications, or may be notified from the base station 10/LMF 30 to the terminal 20.
  • terminal 20 When BW aggregation enable is set/instructed for terminal 20, terminal 20 performs PRS measurements at PFL0 and PFL1 using PPW0 and PPW1 shown in Figure 8 by applying the PPW parameters of PPW0, which has the smallest PPW ID, to PPW1 as well.
  • the PPW parameters can be simplified, and therefore the UE complexity when the terminal 20 receives the BW aggregated DL-PRS can be reduced.
  • the terminal 20 reports its own capability (capability information) regarding BW aggregation for MG-less positioning to the NW (base station 10/LMF 30).
  • capability may be any one, any multiple, or all of the following (1) to (3).
  • Capability may also be information other than the following (1) to (3).
  • the base station 10/LMF 30 can transmit to the terminal 20 configuration information corresponding to the capability notified from the terminal 20. For example, in the configuration of the PPW association described in the first embodiment, the base station 10/LMF 30 A number of PPWs equal to or less than the "maximum number of PPWs capable of BW aggregation" supported by terminal 20 can be set in terminal 20.
  • ID may be replaced with “index”, etc.
  • BW aggregation for positioning may be replaced with “PRS aggregation”, “PRS multiplexing”, “Simultaneous PRS Tx/Rx”, etc.
  • the base station 10/LMF 30 and the terminal 20 include functions for implementing all of the above-mentioned embodiments. However, the base station 10/LMF 30 and the terminal 20 may each have only the functions of any of the embodiments among all of the embodiments.
  • Fig. 10 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. 10 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 transmitting unit 110 has a function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly.
  • the transmitting unit 110 can also transmit a signal to other network devices such as the LMF 30.
  • the receiving unit 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 signal.
  • the receiving unit 120 can also receive signals from network devices such as the LMF 30.
  • the transmitting unit 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 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 LMF 30 may also have the configuration shown in FIG. 10.
  • the transmitter 110 transmits signals to other network devices (including base stations), and the receiver 120 receives signals from other network devices (including base stations).
  • Fig. 11 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. 11 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 functional units in the control unit 240 related to signal transmission may be included in the transmission unit 210, and the functional units in the control unit 240 related to signal reception may be included in the reception unit 220.
  • the transmission unit 210 may be called a transmitter, and the reception unit 220 may be called a receiver.
  • Additional Notes a receiver for receiving information from a network relating a plurality of windows in a plurality of frequency domains; and a control unit that assumes receiving a reference signal for positioning by using the multiple windows in the multiple frequency domains based on the information.
  • the receiver receives, from the network, information indicating whether a positioning scheme using a combination of measurement results of reference signals received in each of the plurality of frequency domains is applied.
  • the receiving unit receives the reference signal in each of the plurality of windows, or receives the reference signal only in a time region where the plurality of windows overlap in time.
  • control unit uses parameters of a specific window among the plurality of windows as parameters of each window in the plurality of windows.
  • a control unit that generates information relating a plurality of windows in a plurality of frequency domains; a transmitter unit that transmits the information to a terminal, thereby causing the terminal to receive a reference signal for positioning using the multiple windows in the multiple frequency domains.
  • any of the above paragraphs provide a technology that enables a terminal to appropriately receive a reference signal for positioning using multiple windows in multiple frequency domains.
  • a positioning method that combines and uses measurement results of reference signals received in each of multiple frequency domains.
  • supplementary paragraph 3 for example, it is possible to avoid excessive dropping of DL signals by avoiding reception of unnecessary reference signals.
  • parameters can be simplified.
  • 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.).
  • 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, regarding, 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, LMF 30, 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. 12 is a diagram showing an example of the hardware configuration of the base station 10, terminal 20, and LMF 30 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, terminal 20, and LMF 30 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, the terminal 20, and the LMF 30 are realized by loading specific software (programs) onto hardware such as the processor 1001 and the memory 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 memory device 1002 and the auxiliary memory 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 also 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 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001.
  • the control unit 240 of the terminal 20 may be realized by a control program stored in the storage device 1002 and operated by 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
  • a 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, the terminal 20, and the LMF 30 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), or an FPGA (Field Programmable Gate Array), and some or all of the functional blocks may be realized by the hardware.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • PLD Programmable Logic Device
  • FPGA Field Programmable Gate Array
  • the processor 1001 may be implemented using at least one of these pieces of hardware.
  • the terminal 20, the base station 10, or the LMF 30 may be provided in the vehicle 2001.
  • FIG. 13 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, the base station 10, or the LMF 30 according to each aspect/embodiment described in this disclosure may be applied to a communication device mounted on the vehicle 2001, for example, 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 in 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, the terminal 20, and the LMF 30 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.
  • RAM random access memory
  • ROM read only memory
  • EPROM EPROM
  • EEPROM electrically erasable programmable read only memory
  • register hard disk
  • removable disk CD-ROM
  • database database
  • server 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.
  • At least one of the channel and the symbol may be a signal (signaling).
  • the signal may be a message.
  • a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.
  • system and “network” are used interchangeably.
  • radio resources 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 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 30 LMF 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 wheels 2008 Rear wheels 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 support system unit 2031 Microprocessor 2032 Memory (ROM, RAM) 2033 Communication port (IO port)

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