WO2022153636A1 - Dispositif terminal, dispositif de station de base et dispositif de gestion de station de base - Google Patents

Dispositif terminal, dispositif de station de base et dispositif de gestion de station de base Download PDF

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Publication number
WO2022153636A1
WO2022153636A1 PCT/JP2021/038624 JP2021038624W WO2022153636A1 WO 2022153636 A1 WO2022153636 A1 WO 2022153636A1 JP 2021038624 W JP2021038624 W JP 2021038624W WO 2022153636 A1 WO2022153636 A1 WO 2022153636A1
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Prior art keywords
base station
communication quality
terminal device
information
measurement
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PCT/JP2021/038624
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English (en)
Japanese (ja)
Inventor
大輝 前本
恒夫 中田
茂樹 河合
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株式会社デンソー
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Publication of WO2022153636A1 publication Critical patent/WO2022153636A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
    • Y02P40/57—Improving the yield, e-g- reduction of reject rates

Definitions

  • the present disclosure is a device for smoothly performing a handover between a base station device and a terminal device, and is mainly executed by a terminal device, a base station device, a base station management device mounted on a vehicle, and a base station management device. Regarding the method and program to be done.
  • V2X vehicle-to-vehicle communication and road-to-vehicle communication, and the like are attracting attention.
  • vehicles have come to have a communication function, and so-called vehicle connectivity is progressing.
  • the base station device transmits measurement setting information (MC: Measurement Config) to the wireless terminal device, and the wireless terminal device that measures the radio wave intensity based on the instruction of the MC sends the measurement setting information (MC: Measurement Config) to the base station device.
  • MC Measurement Config
  • MR Measurement Report
  • a base station selection list created by a base station management device in consideration of communication load information of the base station device can be transmitted to the wireless terminal device via the base station device and connected to the wireless terminal device. It is described that the service quality of the user is improved by displaying and selecting the base station device. Then, in order to realize this, the measurement setting information transmitted from the base station device and the measurement report information transmitted from the wireless communication terminal device are used.
  • the present inventors have found the following problems.
  • the reception quality of the received signal fluctuates greatly and sharply. It may not be possible to respond to fluctuations in.
  • the measurement range by the MC is limited, and there is a possibility that the handover to the optimum base station device cannot be performed.
  • An object of the present disclosure is to realize a device or the like capable of appropriately establishing communication between a terminal device and a base station device even when the reception quality of the received signal fluctuates greatly and sharply.
  • the terminal device is a terminal device that wirelessly communicates with the base station device, and is a receiving unit that receives measurement setting information instructing the prediction of communication quality from the base station device.
  • a future position information acquisition unit that acquires future position information indicating the future position of the terminal device, reference position information indicating the reference position, base station device identification information indicating the base station device that can be connected at the reference position, and the above.
  • Communication quality that predicts the communication quality of the wireless communication at the future position by using the radio map acquisition unit that acquires the radio map including the communication quality of the wireless communication at the reference position and the future position information and the radio map. It has a prediction unit and a transmission unit that transmits measurement report information including predicted communication quality information indicating the predicted communication quality to the base station apparatus.
  • the base station device is a base station device that wirelessly communicates with a terminal device, and is a transmission unit that transmits measurement setting information instructing the terminal device to predict communication quality. And a receiving unit that receives measurement report information including predicted communication quality information indicating the communication quality predicted by the terminal device from the terminal device.
  • the base station management device is a base station management device that manages a base station device that performs wireless communication with a terminal device, and is a movement information that acquires movement information that specifies a movement status of the terminal device. It has an acquisition unit, a measurement setting information generation unit that generates measurement setting information instructing the terminal device to predict communication quality, and a transmission unit that transmits the measurement setting information to the base station device. ..
  • FIG. 1 is an explanatory diagram showing an overall configuration of each embodiment of the present disclosure.
  • FIG. 2 is an explanatory diagram showing an example of a radio wave map of each embodiment of the present disclosure.
  • FIG. 3 is an explanatory diagram illustrating communication between the base station device and the terminal device according to each embodiment of the present disclosure.
  • FIG. 4 is a block diagram showing a configuration example of the terminal device according to the first embodiment of the present disclosure.
  • FIG. 5 is an explanatory diagram showing an example of measurement setting information (MC) according to the first embodiment of the present disclosure.
  • FIG. 6 is an explanatory diagram showing an example of the measurement report information (MR) of the first embodiment of the present disclosure.
  • FIG. 7 is a block diagram showing a configuration example of the base station device and the base station management device according to the first embodiment of the present disclosure.
  • FIG. 8 is an explanatory diagram illustrating a specific example of the prediction target base station device and the measurement target base station device according to the first embodiment of the present disclosure.
  • FIG. 9 is a flowchart showing the operation of each device according to the first embodiment of the present disclosure.
  • FIG. 10 is an explanatory diagram illustrating Example 1 of the first embodiment of the present disclosure.
  • FIG. 11 is an explanatory diagram illustrating Example 2 of the first embodiment of the present disclosure.
  • FIG. 12 is a block diagram showing a configuration example of the base station device and the base station management device according to the second embodiment of the present disclosure.
  • the configuration and method described in the dependent clause of the claims are any configuration and method in the invention described in the independent clause of the claims.
  • the configurations and methods of the embodiments corresponding to the configurations and methods described in the dependent terms, and the configurations and methods described only in the embodiments not described in the claims are arbitrary configurations and methods in the present invention.
  • the configuration and method described in the embodiment in the case where the description of the claims is wider than the description of the embodiment is also an arbitrary configuration and method in the present invention in the sense that it is an example of the configuration and method of the present invention. In any case, by describing in the independent clause of the claims, it becomes an indispensable configuration and method of the present invention.
  • the effect described in the embodiment is an effect when the configuration of the embodiment as an example of the present invention is provided, and is not necessarily the effect of the present invention.
  • the configuration disclosed in each embodiment is not closed only in each embodiment, but can be combined across the embodiments.
  • the configuration disclosed in one embodiment may be combined with another embodiment.
  • the disclosed configurations may be collected and combined in each of the plurality of embodiments.
  • the terminal device 100 is a device that is "mounted” in a vehicle that is a “mobile body” and transmits / receives data by performing wireless communication with the base station device 200.
  • "Moving body” means a movable object, and the moving speed is arbitrary. Of course, it also includes the case where the moving body is stopped. For example, including, but not limited to, automobiles, motorcycles, bicycles, pedestrians, ships, aircraft, and objects mounted on them.
  • the term "mounted” includes the case where it is directly fixed to the moving body and the case where it is not fixed to the moving body but moves together with the moving body. For example, it may be possessed by a person riding on a moving body, or it may be carried on a cargo placed on the moving body.
  • the base station device 200 is a device that transmits / receives data by performing wireless communication with the terminal device 100.
  • the base station device 200 is used to comprehensively indicate the plurality of base station devices, and the base station device 200a is used to distinguish each base station device.
  • Base station apparatus 200b is used to distinguish each base station device.
  • the base station management device 300 is a device that manages the base station device 200.
  • the base station management device 300 manages a single or a plurality of base station devices 200.
  • the wireless communication system between the base station device 200 and the terminal device 100 includes, for example, IEEE802.11 (Wi-Fi (registered trademark)), IEEE802.16 (WiMAX (registered trademark)), and W-CDMA (Wideband Code Division). MultipleAccess), HSPA (HighSpeedPacketAccess), LTE (LongTermEvolution), LTE-A (LongTermEvolutionAdvanced), 4G, 5G and the like can be used.
  • IEEE802.11 Wi-Fi (registered trademark)
  • WiMAX registered trademark
  • W-CDMA Wideband Code Division
  • MultipleAccess HighSpeedPacketAccess
  • LTE LongTermEvolution
  • LTE-A LongTermEvolutionAdvanced
  • 4G, 5G and the like can be used.
  • Each embodiment will be described on the premise that a 4G or 5G wireless communication system is used as an example.
  • the communication method between the base station management device 300 and the base station device 200 may be any of a wired communication method, a wireless communication method, and both a wired communication method and a wireless communication method.
  • the base station device 200 corresponds to the eNB, so that the eNB and beyond are usually wired lines of the communication service provider, but the base.
  • the wireless communication method between the station device 200 and the terminal device 100 is Wi-Fi
  • the base station device 200 corresponds to an access point (AP), so that the wireless communication method can be used between the access point and the router.
  • AP access point
  • a wired communication method may be used.
  • the radio wave map server device 400 stores a "radio wave map" targeting the radio wave propagation path provided by the wireless communication method of the base station device 200, and transmits the radio wave map to the request destination.
  • the radio wave map server device 400 transmits a radio wave map to the terminal device 100 and the base station management device 300 in response to a radio wave map request or periodically.
  • the "radio wave map” refers to a set of radio wave propagation path states or estimation results at a specific position, for example, a map of RSSI and transmission bit rate for each grid point on the map.
  • FIG. 2 is an example of a radio wave map used in each embodiment.
  • the reference position information is information indicating the reference position.
  • the grid points on the map are used as the reference position in each embodiment.
  • the grid points on the map can be set, for example, at 10 m intervals, 1 m intervals, or 10 cm intervals, depending on the accuracy of the GNSS satellite.
  • the reference position may be a position obtained as an average value or an intermediate value of the position information in a certain range based on, for example, the position information collected by the probe vehicle and the probe data including the communication quality.
  • the base station identification information is information indicating a base station device that can be connected at a reference position.
  • the base station identification information is defined for each base station device, but the base station identification information may be defined for each cell generated by the base station device or a beam in the base station device.
  • the communication quality is information indicating the "communication quality" of wireless communication with the base station apparatus connected at the reference position.
  • RSSI is used as an example in each embodiment.
  • the "communication quality” indicates the state or estimation result of the radio wave propagation path, and as an index representing this, for example, RSSI, RSRP, RSRQ, SNR, SIR, BER, CSI (Channel State Information: channel). State information), propagation function, propagation path matrix, average bit rate per unit time (bit / s), and the like.
  • the CSI may include a CQI (Channel Quality Indicator).
  • the radio wave map may include information such as the effective time zone of the radio wave map, the connection probability with the base station device, the expected communication speed, the minimum communication speed, and the frequency band.
  • the radio wave map for the uplink in which the state of the radio wave propagation path of the uplink and the position information are linked, and the state of the radio wave propagation path of the downlink and the position information are linked.
  • the radio wave map for the downlink may be used for the evaluation of the radio wave propagation path of the uplink
  • the radio wave map for the downlink may be used for the evaluation of the radio wave propagation path of the downlink.
  • the downlink radio map may be used for the evaluation of the uplink
  • the uplink radio map may be used for the evaluation of the downlink. ..
  • TDD mode in which the uplink and the downlink use the same frequency band.
  • Another example is the case where the same propagation environment is expected to change between the uplink and the downlink due to a shield such as a building.
  • the communication network used for transmitting the radio wave map may be a wired communication method or a wireless communication method. Further, in FIG. 1, when transmitting a radio wave map from the radio wave map server device 400 to the terminal device 100, a communication network that does not go through the base station device 200 is used, but a communication network that goes through the base station device 200. May be used.
  • the GNSS satellite is a satellite that transmits a positioning signal, and examples thereof include GPS and differential GPS.
  • the terminal device 100 receives the positioning signal and, if necessary, uses a gyro and a radar sensor in combination to acquire the current position information indicating the current position of the vehicle.
  • the base station device 200, the base station management device 300, and the radio wave map server device 400 are separate devices in FIG. 1, at least two of these functions may be realized by the same device.
  • the base station device 200m uses a list of measurement target base station devices for measuring communication quality as measurement setting information (MC: Measurement Config) for the terminal device 100. Send.
  • the base station device to be measured is, for example, a base station device 200a adjacent to the base station device 200m.
  • the terminal device 100 that has received the measurement setting information (MC) measures the communication quality of the reference signal (RS: Reference Signal (s)) transmitted from the base station device 200a, which is the measurement target base station device. Then, in light of the communication quality value of the measured reference signal, if a predetermined event is applicable, the measured communication quality or the event that has occurred is used as measurement report information (MR: Measurement Report) of the base station device 200 m.
  • the reference signal used for measuring the communication quality may include an SS / PBCH block (Synchronization Signal (s) / Physical Broadcast Channel block).
  • the SS / PBCH block may consist of four consecutive OFDM symbols and may be used to transmit a reference signal to the primary SS, secondary SS, PBCH, and / or PBCH.
  • the reference signal used for measuring the communication quality may include CSI-RS (CSI-RS resource).
  • the terminal device 100 may perform a communication quality measurement (and / or report) based on the SS / PBCH block in the idle mode state (RRC_IDLE) and / or the inactive mode state (RRC_INACIVE).
  • the terminal device 100 may perform measurement (and / or report) of communication quality based on the SS / PBCH block and / or CSI-RS in the connected mode state (RRC_CONNECTED).
  • the operation described in this embodiment may be applied to the case where the terminal device 100 is in the idle mode state (RRC_IDLE) and / or the inactive mode state (RRC_INACIVE). Further, the operation described in this embodiment may be applied to the case where the terminal device 100 is in the connected mode state (RRC_CONNECTED).
  • the base station device 200m that has received the measurement report information (MR) executes a handover that switches the base station device 200m with which the terminal device 100 is currently communicating to the base station device 200a based on the content of the measurement report information (MR). Determine whether or not to do so.
  • the base station device 200m requests the base station device 200a to perform the handover and also instructs the terminal device 100 to perform the handover. Then, the terminal device 100 establishes communication with the base station device 200a and ends the handover.
  • Each embodiment described below transmits and receives measurement setting information (MC) and measurement report information (MR) including information on prediction using a radio wave map and information related thereto.
  • MC measurement setting information
  • MR measurement report information
  • Embodiment 1 (1) Configuration of Terminal Device 100 The configuration of the terminal device 100 of the first embodiment will be described with reference to FIG.
  • the terminal device 100 includes a control unit 101, a receiving unit 102, a traveling route storage unit 104, a radio wave map storage unit 106, and a transmission unit 108. Further, the control unit 101 realizes a future position information acquisition unit 103, a radio wave map acquisition unit 105, a communication quality prediction unit 107, a speed acquisition unit 109, an estimated time calculation unit 110, and a communication quality measurement unit 111.
  • the terminal device 100 can be composed of a general-purpose CPU (Central Processing Unit), a volatile memory such as RAM, a ROM, a flash memory, a non-volatile memory such as a hard disk, various interfaces, and an internal bus connecting them. .. Then, by executing the software on these hardware, it can be configured to exert the function of each functional block shown in FIG. Of course, the terminal device 100 may be realized by dedicated hardware such as LSI.
  • LSI dedicated hardware
  • the terminal device 100 assumes the form of an electronic control unit (ECU: Electric Control Unit, hereinafter abbreviated as ECU) as a semi-finished product, but the terminal device 100 is not limited to this.
  • ECU Electric Control Unit
  • the form of a component includes a semiconductor circuit or a semiconductor module
  • the form of a finished product includes a personal computer (PC), a smartphone, a mobile phone, and a navigation system.
  • the terminal device 100 may be composed of a plurality of ECUs in addition to a single ECU.
  • the communication ECU may be in charge of communication with the outside.
  • the terminal device 100 When the terminal device 100 is composed of a semiconductor circuit or a semiconductor module, the terminal device 100 can be composed of a control unit 101, a reception unit 102, and a transmission unit 108.
  • the receiving unit 102 and the transmitting unit 108 correspond to interfaces for inputting / outputting data to / from the control unit 101 via an antenna and a communication device provided in a semiconductor circuit or a semiconductor module.
  • the receiving unit 102 receives data from the base station apparatus 200.
  • the measurement setting information (MC) that "instructs” to predict the "communication quality” is received from the base station apparatus 200.
  • the measurement setting information (MC) includes a list of "measurement target base station devices” for which communication quality is measured, and "prediction target base station” for which communication quality is predicted. Includes a list of "devices”.
  • the measurement setting information (MC) of the present embodiment is the result of the prediction by the communication quality prediction unit 107 described later, the condition that needs to be reported by the measurement report information (MR), and / or the communication quality measurement described later.
  • the condition that needs to be reported in the measurement report information may be included.
  • the list of base station devices to be measured is an arbitrary list in the present embodiment and does not necessarily have to be included.
  • the “instruction” includes not only the case where the information directly indicating the instruction is included but also the case where the measurement setting information itself is an instruction to the terminal device.
  • the "prediction target base station device” and the “measurement target base station device” need only be the targets for communication, and in addition to the specific base station device, the cell generated by the specific base station device and the specific base station device. It is a concept including the beam in.
  • FIG. 5 is an example of the measurement setting information (MC) of the present embodiment.
  • the measurement setting information (MC) includes the prediction target base station device, the prediction report condition, the measurement target base station device, and / or the measurement report condition.
  • the prediction target base station apparatus may be replaced as a physical cell ID (PCI: Physical Cell Identifier). That is, the list of prediction target base station devices may be a list of cells (a list of one or a plurality of cells specified by the physical cell ID (s)). Further, in the present embodiment, the measurement target base station device may be replaced with a physical cell ID. That is, the list of measurement target base station devices may be a list of cells (a list of one or a plurality of cells specified by the physical cell ID (s)).
  • PCI Physical Cell Identifier
  • the cell (also referred to as a serving cell) may be specified by the physical cell ID.
  • the base station device 200m measures and sets information (corresponding to "prediction target base station device information") used for instructing a list of cells in which the terminal device 100 is required to predict communication quality. You may include it in and send it.
  • the terminal device 100 may predict the communication quality based on the information transmitted by the base station device 200m (corresponding to "prediction target base station device information"). In the present embodiment, the prediction may include the predictive measurement and / or the predictive measurement and reporting of communication quality.
  • the base station device 200m measures information (corresponding to "measurement target base station device information") used for instructing a list of cells in which the terminal device 100 is required to measure communication quality.
  • the terminal device 100 may measure the communication quality based on the information transmitted by the base station device 200m (corresponding to "measurement target base station device information").
  • the measurement may include measuring without prediction and / or measuring without prediction and reporting communication quality.
  • the base station device 200m may include the prediction target base station device information and the measurement target base station device information in a single measurement setting information and transmit the information.
  • the base station apparatus 200m may transmit the prediction target base station apparatus information including the prediction target base station apparatus information in the prediction measurement setting information, and may include the measurement target base station apparatus information in the measurement setting information and transmit the information.
  • the measurement setting information and / or the predicted measurement information may be set for each cell (for each serving cell).
  • the base station apparatus 200m uses the measurement setting information and / or the predicted measurement setting information as the primary cell (for example, one primary cell) and / or the secondary cell (one or a plurality of secondary cells). It may be set for each of. Further, as will be described later, the base station apparatus 200m may include the measurement setting information and / or the predicted measurement setting information in the system information message (for example, the system information block) and transmit the information. Further, the base station apparatus 200m may transmit the measurement setting information and / or the predicted measurement setting information by including the measurement setting information in the system information message (for example, the system information block).
  • the base station apparatus 200m may transmit the measurement setting information and / or the predicted measurement setting information by including the measurement setting information in the radio resource control signal (RRC message: Radio Resource Control Message).
  • RRC message Radio Resource Control Message
  • the radio resource control signal may include a common RRC message and a dedicated RRC message.
  • the prediction target base station device (corresponding to “prediction target base station device information”) is a base station device for which the communication quality is predicted by the communication quality prediction unit 107 described later.
  • the prediction target base station device is specified in units of cells generated by the base station device indicated by the base station ID.
  • the base station device 200c, the base station device 200d, and the base station device 200e are the base station devices to be predicted. Instead of this, it may be specified in the unit of the beam generated by the base station apparatus indicated by the base station ID.
  • the base station ID may be omitted.
  • the frequency band used by the base station apparatus is specified as a unit.
  • the frequency band may be a carrier frequency.
  • the prediction target base station apparatus may be replaced as a physical cell ID (PCI). Even if each of the set of cell IDs as shown in FIG. 5 (cell (C1), cell (C2) and cell (cell 3), cell (C1) and cell (C4) and cell (C5)) is referred to as a cell list. good. That is, the cell ID included in the cell list may be singular or plural.
  • the base station device 200m may set the list of cells and the carrier frequency for which the terminal device 100 is required to predict the communication quality by using the measurement setting information and / or the predicted measurement setting information. ..
  • the prediction target base station apparatus may be replaced as a beam ID (may be a list of beam IDs).
  • the base station device 200m may set a list of beams and a carrier frequency for which the terminal device 100 is required to predict the communication quality by using the measurement setting information and / or the prediction measurement setting information. ..
  • the prediction report condition is a condition that needs to be reported in the measurement report information (MR) as a result of the prediction by the communication quality prediction unit 107 described later, and in this embodiment, it consists of time and reception quality.
  • the cell (C1) of the base station apparatus 200c needs to be reported by the measurement report information (MR) when the reception quality of R1 or higher is predicted after the time t1.
  • the measurement target base station device (corresponding to “measurement target base station device information”) is a base station device for which the communication quality is measured by the communication quality measurement unit 111 described later.
  • the measurement target base station device is specified in units of cells generated by the base station device indicated by the base station ID.
  • the base station device 200a and the base station device 200b are measurement target base station devices. Instead of this, it may be specified in the unit of the beam generated by the base station apparatus indicated by the base station ID.
  • the base station ID may be omitted.
  • the frequency band used by the base station apparatus is specified as a unit.
  • the frequency band may be a carrier frequency.
  • the measurement target base station apparatus may be replaced as a physical cell ID (PCI).
  • PCI physical cell ID
  • Each of the set of cell IDs (cell (C1), cell (C2) and cell (C3)) as shown in FIG. 5 may be referred to as a cell list.
  • the cell ID included in the cell list may be singular or plural.
  • the base station device 200m may set a list of cells and a carrier frequency for which the terminal device 100 is required to measure the communication quality by using the measurement setting information.
  • the measurement target base station apparatus may be replaced as a beam ID (may be a list of beam IDs).
  • the base station device 200m may set a list of beams and a carrier frequency that the terminal device 100 is required to measure the communication quality by using the measurement setting information.
  • the measurement report condition is a condition that requires a report in the measurement report information (MR) as a result of the measurement by the communication quality measurement unit 111 described later, and is composed of the reception quality in the present embodiment.
  • the cell (C1) of the base station apparatus 200a needs to be reported by the measurement report information (MR) when the reception quality of the reception intensity R1 or higher is measured.
  • the measurement setting information (MC) includes the prediction target base station device, the prediction report condition, the measurement target base station device, and the measurement report condition, but these may be separated. That is, the measurement setting information (MC) includes the measurement target base station device and the measurement report condition, and the predictive measurement setting information (PMC: Predictive Measurement Config) is provided separately from the measurement setting information (MC). Prediction target base station equipment and prediction reporting conditions may be included.
  • the measurement setting information (MC) in the narrow sense and the prediction measurement setting information (PMC) can be combined and grasped as the measurement setting information (MC) in the broad sense (corresponding to "measurement setting information").
  • the measurement setting information (MC) in the broad sense that is, the measurement setting information (MC) and / or the predictive measurement setting information (PMC) in the narrow sense may be included in the system information signal (System Information Message). Further, the measurement setting information (MC) in the broad sense, that is, the measurement setting information (MC) and / or the predictive measurement setting information (PMC) in the narrow sense may be included in the radio resource control signal (RRC message: Radio Resource Control Message). ..
  • the method of specifying the prediction target base station device and the measurement target base station device will be described in the section of the base station device 200.
  • the future position information acquisition unit 103 "acquires" future position information indicating the "future position" of the terminal device 100.
  • the future position is acquired by reading the travel route stored in the travel route storage unit 104 and converting the travel route into a set of position information.
  • “Future location” includes a specific singular or plural points, as well as a route that is a collection of multiple points.
  • “Acquisition” means that when acquiring from an external server device, etc., when acquiring from another device connected to the terminal device, or when reading from the storage unit of the terminal device and acquiring, the terminal device itself When it is acquired by generating, it includes any of.
  • the method by which the future location information acquisition unit 103 acquires the travel route is not limited to this.
  • the travel route may be calculated based on the destination information input by the car navigation system. Further, it may be acquired by downloading a travel route from an external travel support device.
  • the radio wave map acquisition unit 105 "acquires" a "radio wave map" including reference position information indicating a reference position, base station device identification information indicating a base station device that can be connected at the reference position, and communication quality of wireless communication at the reference position. do".
  • the radio wave map shown in FIG. 2 is downloaded from the radio wave map server device 400 and stored in the radio wave map storage unit 106. Then, the radio wave map acquisition unit 105 acquires the radio wave map by reading the radio wave map from the radio wave map storage unit 106.
  • “acquire” means to acquire from an external server device or the like, to acquire from another device connected to the terminal device, to read from the storage unit of the terminal device, and to acquire the terminal. This includes any case where the device obtains it by generating it by itself.
  • a radio wave map request including the future position information acquired by the future position information acquisition unit 103 may be transmitted to the radio wave map server device 400.
  • the radio wave map server device 400 By transmitting the position information in the future in this way, only the radio wave map necessary for the terminal device 100 to use for the prediction can be acquired, and the time required for downloading can be shortened.
  • the method by which the radio wave map acquisition unit 105 acquires the radio wave map is not limited to this.
  • it may be acquired by measuring the reception intensity with a reference signal antenna provided in front of the vehicle in the traveling direction, or may be acquired by using V2X from another vehicle traveling in front of the vehicle.
  • the communication quality prediction unit 107 predicts the communication quality at the future position by using the future position information acquired by the future position information acquisition unit 103 and the radio wave map acquired by the radio wave map acquisition unit 105.
  • the communication quality with the prediction target base station apparatus included in the measurement setting information (MC) received by the receiving unit 102 at a future position is predicted. For example, when the position obtained from the traveling path passes through the reference positions o and p in FIG. 2, the base station device to be predicted and the reception quality at each position are determined by using the radio wave map in FIG. It is predicted to be 200c and RSSI (-30dB), base station equipment 200d and RSSI (-50dB).
  • the speed acquisition unit 109 acquires the moving speed of the moving vehicle.
  • the speed acquisition unit 109 acquires the output from the acceleration sensor or the angular velocity sensor connected to the terminal device 100 or possessed by the terminal device 100, and acquires the moving speed by performing necessary calculations.
  • the estimated time calculation unit 110 and the prediction target base station device are based on the future position information acquired by the future position information acquisition unit 103, the radio wave map acquired by the radio wave map acquisition unit 105, and the moving speed acquired by the speed acquisition unit 109. Find the estimated time for communication. Specifically, the future position information and the radio wave map are used to specify which base station device 200 is to be connected at which position in the traveling route, and the future position information and the moving speed are used to identify each point in the traveling route. Find the time of arrival at. Then, the time corresponding to the position where the connection with each base station device 200 is started is obtained.
  • the communication quality measuring unit 111 "measures" the communication quality of wireless communication with each base station device 200 listed in the list of measurement target base station devices included in the measurement setting information (MC) received by the receiving unit 102. ".
  • the speed acquisition unit 109, the estimated time calculation unit 110, and the communication quality measurement unit 111 have an arbitrary configuration in the present embodiment.
  • “measuring” includes the case where estimation is performed based on the measurement result.
  • the transmission unit 108 transmits the measurement report information (MR) including the predicted communication quality information indicating the communication quality predicted by the communication quality prediction unit 107 to the base station apparatus 200. Further, the prediction target base station device identification information indicating the predicted base station device scheduled to be communicated with the predicted communication quality, the predicted time for communication with the prediction target base station device, the measurement target base station device identification information, and the communication quality.
  • the measured communication quality information indicating the communication quality measured by the measuring unit 111 may be included and transmitted.
  • FIG. 6 is an example of the measurement report information (MR) of the present embodiment.
  • the measurement report information (MR) includes the prediction target base station device, the prediction communication quality information, the prediction time, the measurement target base station device, and the measurement communication quality information.
  • the prediction target base station device (corresponding to "prediction target base station device identification information") is a prediction target base station device included in the measurement setting information (MC). However, it is not necessary to include the prediction target base station device that does not satisfy the prediction report condition in the measurement report information (MR).
  • the predicted communication quality information is the predicted communication quality when the prediction reporting condition included in the measurement setting information (MC) is satisfied.
  • the estimated time is an estimated time when the prediction reporting condition included in the measurement setting information (MC) is satisfied.
  • the case where the reception intensity becomes R1 or more after the time t1 is a prediction reporting condition.
  • R4 which is a predicted value having a higher reception intensity than R1 is reported at 10:05:05, which is earlier than t1.
  • the measurement target base station device (corresponding to "measurement target base station device information") is a measurement target base station device included in the measurement setting information (MC). However, the measurement target base station device that does not satisfy the measurement report condition does not need to be included in the measurement report information (MR).
  • the measurement communication quality information is the measurement communication quality when the measurement report conditions included in the measurement setting information (MC) are satisfied.
  • the reporting condition is that the base station apparatus 200a (or cell (C1)) has a reception intensity of R1 or more.
  • R4 which is a predicted value having a higher reception intensity than R1, is reported.
  • the measurement report information (MR) may include an event content indicating the case where the prediction report condition included in the measurement setting information (MC) is fulfilled. For example, when a predetermined reception intensity or higher is predicted under the prediction report conditions, an event identifier called event A1 indicating this may be defined and included in the measurement report information (MR).
  • the measurement report information (MR) may include the position information and the movement route of the terminal device 100.
  • the measurement report information (MR) includes the prediction target base station device, the prediction communication quality information, the prediction time, the measurement target base station device, and the measurement communication quality information, but these may be separated. That is, the measurement report information (MR) includes the measurement target base station device and the measurement communication quality information, and the predictive measurement report information (PMR: Predictive Measurement Report) is provided separately from the measurement report information (MR). May include the predicted base station device, the predicted communication quality information, and the predicted time. In this case as well, the measurement report information (MR) in the narrow sense and the prediction measurement report information (PMR) can be grasped as the measurement report information (MR) in the broad sense (corresponding to “measurement report information”).
  • the measurement report information (MR) in the broad sense that is, the measurement report information (MR) and / or the predictive measurement report information (PMR) in the narrow sense may be included in the radio resource control signal (RRC: RadioResourceControlMessage).
  • RRC RadioResourceControlMessage
  • the base station device 200 has a transmission unit 201, a reception unit 202, and a handover (HO) processing unit 203.
  • the base station management server device 300 includes a control unit 301, a reception unit 302, and a transmission unit 303. Further, the control unit 301 realizes the movement information detection unit 304, the prediction target base station device / condition identification unit 305, the measurement target base station device / condition identification unit 306, the measurement information generation unit 307, and the movement information decoding unit 308. ..
  • the receiving unit 302 receives the signal transmitted from the terminal device 100 via the base station device 200.
  • the movement information detection unit 304 acquires the movement information by detecting the movement information that specifies the movement status of the terminal device 100 based on the signal received by the reception unit 302. For example, the current position of the terminal device 100 connected to the base station device 200 is detected based on the strength and the receiving direction of the signal transmitted from the terminal device 100. Further, the moving direction and moving speed of the terminal device 100 are detected based on, for example, a change in the current position of the terminal device 100 at regular time intervals.
  • the prediction target base station device / condition identification unit 305 (corresponding to the “prediction target base station device identification unit”) is a prediction target that predicts communication quality based on the movement information detected by the movement information detection unit 304. Identify the base station equipment.
  • the prediction target base station device / condition specifying unit 305 may further specify the conditions that the terminal device 100 needs to report in the measurement report information (MR).
  • MR measurement report information
  • the measurement target base station device / condition identification unit 306 (corresponding to the “measurement target base station device identification unit”) is a measurement target that measures communication quality based on the movement information detected by the movement information detection unit 304. Identify the base station equipment.
  • the measurement target base station device / condition specifying unit 306 may further specify the conditions that the terminal device 100 needs to report in the measurement report information (MR).
  • MR measurement report information
  • the measurement target base station device / condition specifying unit 306 identifies the base station device 200a and the base station device 200b as the measurement target base station device to which the terminal device 100 measures the communication quality of wireless communication.
  • the measurement target base station device / condition specifying unit 306 needs to report when the reception quality is equal to or higher than a predetermined value, for example, RSSI is R1 or higher, as a condition that the terminal device 100 needs to report in the measurement report information (MR).
  • a condition R1 is specified as a condition.
  • the motive for setting the condition and the setting method are not limited to this.
  • the measurement target base station device / condition specifying unit 306 simply identifies the base station device 200 adjacent to the base station device 200 m as the measurement target base station device, not based on the moving speed and moving direction of the terminal device 100. You may.
  • the prediction target base station device / condition specifying unit 305 uses the base station device 200c, the base station device 200d, and the base station device 200e as a prediction target base for which the terminal device 100 predicts the communication quality of wireless communication. Identify as a station device.
  • the terminal device 100 is connected to any one of the base station device 200c, the base station device 200d, and the base station device 200e, it is not always necessary to receive all the prediction results in the measurement report information (MR). do not have. Therefore, in the prediction target base station device / condition specifying unit 305, as a condition that the terminal device 100 needs to report in the measurement report information (MR), the time is a predetermined time or more, for example, the cell (C1) of the base station device 200c is set. It is specified on condition that t1 and R1 are required to be reported up to t1 and when the reception quality is equal to or higher than a predetermined value, for example, when the RSSI of the cell (C1) of the base station apparatus 200c is R1 or higher. The same applies to the base station apparatus 200d and the base station apparatus 200e.
  • the motive for setting the condition and the setting method are not limited to this.
  • the measurement setting information generation unit 307 generates measurement setting information (MC) that "instructs" the terminal device 100 to predict "communication quality". More specifically, a list of prediction target base station devices specified by the prediction target base station device / condition specifying unit 305 and a list of measurement target base station devices specified by the measurement target base station device / condition specifying unit 306. Generate measurement setting information (MC) including. For example, as shown in FIG. 5, the base station device 200c, the base station device 200d, and the base station device 200e are specified as the prediction target base station devices in the measurement setting information (MC), and are used as the measurement target base station devices. , The base station device 200a and the base station device 200b have been specified. Further, as for the conditions, the conditions as shown in FIG. 5 are specified.
  • the transmission unit 303 transmits the measurement setting information (MC) generated by the measurement setting information generation unit 307 to the base station apparatus 200.
  • the movement information decoding unit 308 (corresponding to the “movement information acquisition unit”) acquires movement information that identifies the movement status of the terminal device 100 by decoding the signal received by the reception unit 302.
  • the difference from the movement information detection unit 304 is that the movement information detection unit 304 always acquires the movement information regardless of the content of the signal transmitted from the terminal device 100, whereas the movement information decoding unit 308 is from the terminal device 100. It differs in that it acquires movement information based on the content of the transmitted signal.
  • the movement information decoding unit 308 decodes the signal transmitted from the terminal device 100 to acquire the movement speed and the current position measured by the terminal device 100.
  • the mobile information decoding unit 308 decodes the signal transmitted from the terminal device 100 to acquire future position information indicating the future position of the terminal device 100.
  • the prediction target base station device / condition specifying unit 305 is the movement decoded by the movement information decoding unit 308 together with the movement information detected by the movement information detection unit 304 or instead of the movement information detected by the movement information detection unit 304.
  • Information may be used to identify the base station device and conditions to be predicted. For example, by specifying the prediction target base station device based on the future position information indicating the future position of the terminal device 100, the prediction target base station device can be accurately specified.
  • the transmission unit 201 of the base station device 200 transmits the measurement setting information (MC) transmitted from the transmission unit 303 of the base station management device 300 to the terminal device 100.
  • MC measurement setting information
  • the receiving unit 202 of the base station device 200 receives the measurement report information (MR) transmitted from the transmitting unit 108 of the terminal device 100.
  • MR measurement report information
  • the handover (HO) processing unit 203 of the base station device 200 performs the handover processing of the terminal device 100 based on the measurement report information (MR) received by the receiving unit 202.
  • the contents of the handover process are 1. This is as described in (2) and FIG.
  • the base station management device 300 may perform the handover process.
  • the measurement report information (MR) may be transmitted from the base station device 200 to the base station management device 300, and the base station management device 300 may be provided with the same configuration as the handover processing unit 203.
  • the base station device 200 and the base station management device 300 may be configured as one.
  • Terminal Device 100 Base Station Device 200, and Base Station Management Device 300
  • the operation of the terminal device 100 of the present embodiment will be described with reference to the flowchart of FIG.
  • the following operation not only shows the predicted communication quality reporting method executed by the terminal device 100, but also shows the processing procedure of the predicted communication quality reporting program that can be executed by the terminal device 100. Further, it not only shows the communication quality prediction instruction method executed by the base station device 200 and the base station management device 300, but also shows the communication quality prediction instruction program that can be executed by the base station device 200 and the base station management device 300. be. And these processes are not limited to the order shown in FIG. That is, the order may be changed as long as there is no restriction that the result of the previous step is used in a certain step.
  • the movement information detection unit 304 of the base station management device 300 acquires the movement information by detecting the movement information that specifies the movement status of the terminal device 100 based on the signal received by the reception unit 302.
  • the mobile information decoding unit 308 acquires movement information that identifies the movement status of the terminal device 100 by decoding the signal received by the reception unit 302 (S301).
  • the prediction target base station device / condition specifying unit 305 identifies the prediction target base station device that is the target for predicting the communication quality based on the movement information detected or decoded in S301 (S302).
  • the measurement setting information generation unit 307 generates measurement setting information (MC) instructing the terminal device 100 to predict the communication quality (S303).
  • the transmission unit 303 transmits the measurement setting information (MC) generated in S303 to the base station apparatus 200 (S304).
  • the transmission unit 201 of the base station device 200 transmits the measurement setting information (MC) transmitted in S304 to the terminal device 100 (S201).
  • the receiving unit 102 of the terminal device 100 receives the measurement setting information (MC) instructing the prediction of the communication quality from the base station device 200 (S101).
  • the future position information acquisition unit 103 acquires future position information indicating the future position of the terminal device 100 (S102).
  • the radio wave map acquisition unit 105 acquires a radio wave map including reference position information indicating a reference position, base station device identification information indicating a base station device that can be connected at the reference position, and communication quality of wireless communication at the reference position (S103). ).
  • the communication quality prediction unit 107 predicts the communication quality at the future position by using the future position information acquired in S102 and the radio wave map acquired in S103 (S104).
  • the transmission unit 108 transmits the measurement report information (MR) including the predicted communication quality information indicating the communication quality predicted in S104 to the base station apparatus 200 (S105).
  • the receiving unit 202 of the base station apparatus 200 receives the measurement report information (MR) transmitted in S105 (S202).
  • the handover (HO) processing unit 203 performs the handover processing of the terminal device 100 based on the measurement report information (MR) received in S202 (S203).
  • Example 1 This embodiment will be described with reference to FIG. In this embodiment, it is assumed that the base station apparatus 200m acquires the predicted communication quality information and the estimated time of the base station apparatus 200a that the terminal apparatus 100 is likely to connect to in the future, and prepares for a future handover.
  • the base station device 200m has measurement setting information that sets the prediction target base station device to the base station device 200a and the reception quality (RSSI) to be R1 or higher within the time t1 as the prediction reporting condition with respect to the connected terminal device 100. (MC) is transmitted.
  • the terminal device 100 predicts whether or not it can be connected to the base station device 200a within the time t1 with a reception quality R1 or higher by using the traveling route, the moving speed, and the radio wave map of the vehicle.
  • the base station apparatus 200a can be connected to the base station apparatus 200a at a time T1 with a reception quality R1 or higher.
  • the terminal device 100 transmits the measurement report information (MR) including the base station device 200a as the prediction target base station device, R1 as the predicted communication quality information, and T1 as the predicted time to the base station device 200.
  • the base station apparatus 200 performs a handover process in preparation for the handover at T1.
  • Example 2 This embodiment will be described with reference to FIG. This embodiment is based on the predicted communication quality information of the base station device 200 to which the terminal device 100 is currently connected and the predicted communication quality information of the base station device 200a which is likely to be connected in the future. It is assumed that the base station apparatus 200 acquires an estimated time when the communication quality becomes a certain level or higher and prepares for a future handover.
  • the base station device to be predicted is the base station device 200m and the base station device 200a, and the prediction reporting condition is that the reception quality offset is ⁇ or more within time t2.
  • the measured measurement setting information (MC) is transmitted.
  • the terminal device 100 uses the traveling route, moving speed, and radio wave map of the vehicle to change the reception quality obtained from the radio wave map of the base station device 200m and the reception quality obtained from the radio wave map of the base station device 200a. Is compared, and the time (T2) at which the reception quality of the base station device 200a is ⁇ greater than the reception quality of the base station device 200m is predicted. In FIG. 11, the time T2 is earlier than the time t2.
  • the terminal device 100 transmits the measurement report information (MR) including the base station device 200m and the base station device 200a as the prediction target base station device, ⁇ as the predicted communication quality information, and T2 as the predicted time to the base station device 200m. do.
  • the base station device 200m performs the handover process in preparation for the handover at T2.
  • the measurement setting information (MC) includes a list of the prediction target base station devices specified by the prediction target base station device / condition specifying unit 305 of the base station management device 300. It is included, but not necessarily included.
  • the measurement setting information (MC) includes a flag instructing the terminal device 100 to predict the communication quality. Then, when the terminal device 100 detects such a flag, the future position information and the radio wave map are used to predict the prediction target base station device identification information of the prediction target base station device to be connected within a certain range, for example, within the next 5 minutes.
  • the communication quality information and the estimated time are included in the measurement report information (MR) and transmitted to the base station apparatus 200. According to such a configuration, it is not necessary for the base station device 200 and the base station management device 300 to specify the movement status of the terminal device 100, so that the processing of the base station device 200 and the base station management device 300 can be reduced. can.
  • the communication quality of wireless communication at the future position is predicted by using the future position information and the radio wave map based on the measurement setting information instructing to predict the communication quality. Therefore, the handover process can be scheduled in advance. Further, since the estimated time is obtained based on the moving speed of the moving body, the start timing of the handover process can be easily determined by subtracting the time required for the handover process from the estimated time when scheduling the handover process. .. Furthermore, since the measurement setting information (MC) includes the conditions that need to be reported in the measurement report information (MR), the terminal device will transmit the measurement report information (MR) only when the conditions are satisfied. , Communication resources can be saved.
  • the terminal device 100 uses the radio wave map to predict the predicted communication quality and the predicted time of the base station device to be predicted.
  • the base station management device 300 predicts the predicted communication quality and the predicted time of the base station device to be predicted by using the radio wave map. In this case, the prediction by the terminal device 100 is not always necessary.
  • the configuration of the base station management device 300 of the present embodiment will be described with reference to FIG.
  • the base station management device 300 shown in FIG. 7 is provided with a radio wave map acquisition unit 309.
  • the same configuration as the base station management device 300 of FIG. 7 uses the same drawing number, the description is omitted, and the description of the first embodiment is quoted.
  • the radio wave map acquisition unit 309 "acquires" a "radio wave map" including reference position information indicating a reference position, base station device identification information indicating a base station device that can be connected at the reference position, and communication quality of wireless communication at the reference position. do".
  • the radio wave map is acquired by receiving the radio wave map from the radio wave map server device 400 (not shown), but the radio wave map may be acquired by another method as in the first embodiment.
  • the movement information decoding unit 308 acquires movement information that identifies the movement status of the terminal device 100 by decoding the signal received by the reception unit 302. For example, the movement information decoding unit 308 decodes the signal transmitted from the terminal device 100 to acquire the movement speed and the current position measured by the terminal device 100. In addition, the mobile information decoding unit 308 decodes the signal transmitted from the terminal device 100 to acquire future position information indicating the future position of the terminal device 100.
  • the prediction target base station device / condition identification unit 305 uses the movement information detected by the movement information detection unit 304 and the radio wave map acquired by the radio wave map acquisition unit 309, and the prediction target base station device that the terminal device 100 communicates with in the future. , And predict the communication quality and estimated time of wireless communication with the base station device to be predicted at the future position.
  • the measurement setting information generation unit 307 includes the communication quality and the estimated time of wireless communication with the prediction target base station device specified by the prediction target base station device / condition identification unit 305 and the prediction target base station device at a future position. Generate measurement setting information (MC).
  • the transmission unit 303 transmits the measurement setting information (MC) generated by the measurement setting information generation unit 307 to the base station apparatus 200.
  • the transmission unit 201 of the base station device 200 transmits the measurement setting information (MC) transmitted from the transmission unit 303 of the base station management device 300 to the terminal device 100.
  • the information transmitted to the terminal device 100 may include the prediction target base station device included in the measurement setting information (MC).
  • the communication quality and estimated time included in the measurement setting information (MC) do not necessarily have to be transmitted to the terminal device 100.
  • prediction reporting conditions and measurement reporting conditions may be included.
  • the communication quality measuring unit 111 of the terminal device 100 measures the communication quality of wireless communication with each base station device 200 listed in the list of prediction target base station devices included in the measurement setting information (MC).
  • the communication quality may be measured when the reference signal of each base station device 200 can be received.
  • the transmission unit 108 of the terminal device 100 transmits measurement report information (MR) including measurement communication quality information indicating the communication quality measured by the communication quality measurement unit 111 to the base station device 200.
  • MR measurement report information
  • the receiving unit 202 of the base station device 200 receives the measurement report information (MR) transmitted from the transmitting unit 108 of the terminal device 100.
  • MR measurement report information
  • the handover (HO) processing unit 203 of the base station apparatus 200 is included in the measurement setting information (MC) received by the receiving unit 202 and the measurement setting information (MC) transmitted from the transmitting unit 303 of the base station management apparatus 300.
  • Handover processing of the terminal device 100 is performed based on the communication quality and the estimated time.
  • the contents of the handover process are 1. This is as described in (2) and FIG.
  • the base station management device 300 predicts the communication quality between the terminal device 100 and the base station device 200, it is not necessary for the terminal device 100 to make the prediction, and the terminal device 100 does not need to make the prediction.
  • the processing can be lightened.
  • Embodiments 1 and 2 focus on the evaluation of the reception quality of the downlink, but may be applied to the uplink. In that case, it is desirable to use the radio wave map for the uplink as the radio wave map.
  • the block diagram used in the explanation of the embodiment is a classification and arrangement of the configuration of the device for each function.
  • the blocks showing each function are realized by any combination of hardware or software. Further, since the block diagram shows the function, the block diagram can be grasped as the disclosure of the invention of the method and the invention of the program that realizes the method.
  • Each embodiment is premised on a device mounted on a vehicle, but the present invention also includes a dedicated or general-purpose device other than that for a vehicle, unless otherwise limited within the scope of the claims.
  • Examples of the form of the component include a semiconductor element, an electronic circuit, a module, and a microcomputer.
  • Examples of the semi-finished product include an electronic control unit (ECU) and a system board.
  • Examples of the finished product include mobile phones, smartphones, tablets, personal computers (PCs), workstations, and servers.
  • it includes a device having a communication function and the like, and examples thereof include a video camera, a still camera, and a car navigation system.
  • the base station device and the base station management device of the present disclosure are used for the purpose of providing various services. With the provision of such services, the equipment of the present disclosure will be used, the methods of the present disclosure will be used, and / and the programs of the present disclosure will be executed.
  • the present disclosure can be realized not only by the dedicated hardware having the configuration and the function described in each embodiment, but also a program for realizing the present disclosure recorded on a recording medium such as a memory or a hard disk, and a program thereof. It can also be realized as a combination with an executable dedicated or general-purpose CPU and general-purpose hardware having a memory or the like.
  • Programs stored in a non-transitional substantive recording medium of dedicated or general-purpose hardware for example, an external storage device (hard disk, USB memory, CD / BD, etc.) or an internal storage device (RAM, ROM, etc.)
  • a recording medium or via a communication line from a server without a recording medium This ensures that you always have the latest features through program upgrades.
  • the terminal device, base station device, and base station management device of the present disclosure can be used not only for a wide area cellular wireless communication system but also for a wireless LAN and a low power consumption wide area wireless communication system (LPWA). Further, although the terminal device of the present disclosure has been described as a device mainly for a vehicle mounted on an automobile, it is applied not only to motorcycles, bicycles with electric motors, railways, but also to pedestrians, ships, aircraft, and other moving objects in general. It is possible to do.

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  • Signal Processing (AREA)
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Abstract

L'invention concerne un dispositif terminal (100) qui réalise une communication sans fil avec un dispositif de station de base, et comprend : une unité de réception (102) pour recevoir des informations de réglage de mesure ordonnant qu'une prédiction de qualité de communication doit être effectuée, à partir du dispositif de station de base ; une unité d'acquisition d'informations de position future (103) pour acquérir des informations de position future indiquant la position future du dispositif terminal ; une unité d'acquisition de carte d'ondes radio (105) pour acquérir une carte d'ondes radio comprenant des informations de position de référence indiquant une position de référence, des informations d'identification de dispositif de station de base indiquant un dispositif de station de base pouvant être connecté au niveau de la position de référence, et la qualité de communication d'une communication sans fil au niveau de la position de référence ; une unité de prédiction de qualité de communication (107) pour utiliser les informations de position future et la carte d'ondes radio pour prédire la qualité de communication de la communication sans fil au niveau de la position future ; et une unité de transmission (108) pour transmettre des informations de rapport de mesure comprenant des informations de qualité de communication prédites indiquant la qualité de communication prédite au dispositif de station de base.
PCT/JP2021/038624 2021-01-13 2021-10-19 Dispositif terminal, dispositif de station de base et dispositif de gestion de station de base WO2022153636A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014232992A (ja) * 2013-05-29 2014-12-11 パナソニック株式会社 無線通信装置及び無線基地局切替方法
WO2015145708A1 (fr) * 2014-03-28 2015-10-01 株式会社日立製作所 Système de communication sans fil et dispositif de commande
JP2016100606A (ja) * 2014-11-18 2016-05-30 国立大学法人東北大学 無線通信システム、無線端末および無線通信方法
JP2018006924A (ja) * 2016-06-29 2018-01-11 富士通株式会社 制御装置、基地局装置、通信システム、及び基地局装置制御方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014232992A (ja) * 2013-05-29 2014-12-11 パナソニック株式会社 無線通信装置及び無線基地局切替方法
WO2015145708A1 (fr) * 2014-03-28 2015-10-01 株式会社日立製作所 Système de communication sans fil et dispositif de commande
JP2016100606A (ja) * 2014-11-18 2016-05-30 国立大学法人東北大学 無線通信システム、無線端末および無線通信方法
JP2018006924A (ja) * 2016-06-29 2018-01-11 富士通株式会社 制御装置、基地局装置、通信システム、及び基地局装置制御方法

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