WO2022118520A1 - 電波マップ提供装置、電波マップ提供方法、及び電波マップ提供プログラム - Google Patents
電波マップ提供装置、電波マップ提供方法、及び電波マップ提供プログラム Download PDFInfo
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- WO2022118520A1 WO2022118520A1 PCT/JP2021/034427 JP2021034427W WO2022118520A1 WO 2022118520 A1 WO2022118520 A1 WO 2022118520A1 JP 2021034427 W JP2021034427 W JP 2021034427W WO 2022118520 A1 WO2022118520 A1 WO 2022118520A1
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- Prior art keywords
- radio wave
- wave map
- communication quality
- information
- reference position
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/38—Electronic maps specially adapted for navigation; Updating thereof
- G01C21/3804—Creation or updating of map data
- G01C21/3807—Creation or updating of map data characterised by the type of data
- G01C21/3811—Point data, e.g. Point of Interest [POI]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/0252—Radio frequency fingerprinting
- G01S5/02521—Radio frequency fingerprinting using a radio-map
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/38—Electronic maps specially adapted for navigation; Updating thereof
- G01C21/3885—Transmission of map data to client devices; Reception of map data by client devices
- G01C21/3889—Transmission of selected map data, e.g. depending on route
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/38—Electronic maps specially adapted for navigation; Updating thereof
- G01C21/3885—Transmission of map data to client devices; Reception of map data by client devices
- G01C21/3896—Transmission of map data from central databases
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/01—Determining conditions which influence positioning, e.g. radio environment, state of motion or energy consumption
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/0252—Radio frequency fingerprinting
- G01S5/02521—Radio frequency fingerprinting using a radio-map
- G01S5/02523—Details of interaction of receiver with radio-map
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/22—Traffic simulation tools or models
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- 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]
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- 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]
- H04W4/44—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/14—Access restriction or access information delivery, e.g. discovery data delivery using user query or user detection
Definitions
- This application relates to a device related to a radio wave map, etc., and mainly relates to a radio wave map providing device realized by a server, a method realized by the radio wave map providing device, and a program executed by the radio wave map providing device.
- V2X vehicle-to-vehicle communication and road-to-vehicle communication
- Patent Document 1 describes a communication resource map showing a correspondence relationship between a point and the amount of communication resources estimated to be available for communication at that point.
- the present inventors have found the following problems as a result of detailed studies.
- fading is taken into consideration by receiving in advance a communication resource map of the point where the movement is planned from a device having a communication resource map showing the correspondence relationship between the point and the amount of communication resources.
- Communication can be scheduled.
- the amount of communication may become enormous.
- routes such as automobiles change as appropriate according to the conditions of roads and occupants, if a new map is provided each time the route is changed, the amount of communication required to send and receive the map will further increase.
- the purpose of this disclosure is to suppress the amount of communication required for transmitting and receiving radio wave maps while the mobile body provides information necessary for communication scheduling.
- the radio wave map providing device is a radio wave map providing device that receives a radio wave map request from a radio wave map acquisition and utilization device mounted on a moving body and transmits necessary information, and is a reference indicating a reference position.
- the radio wave map storage unit that stores the radio wave map having the position information and the reference communication quality information indicating the communication quality at the reference position, the movement section information indicating the planned movement section of the moving body, and the required communication quality are shown.
- the standard communication quality information equal to or higher than the required communication quality information.
- the amount of information is compared with the amount of information of the standard communication quality information below the required communication quality information, and the provided standard communication quality information which is the standard communication quality information having a small amount of information and the standard communication quality information correspond to the standard communication quality information.
- It includes a radio wave map reply generation unit that generates a radio wave map reply based on the provision reference position information that is reference position information, and a transmission unit that transmits the radio wave map reply.
- the radio wave map providing method is a radio wave map providing method executed by a radio wave map providing device that receives a radio wave map request from a radio wave map acquisition and using device mounted on a moving body and transmits necessary information. Therefore, the radio wave map providing device includes a radio wave map storage unit that stores a radio wave map having reference position information indicating a reference position and reference communication quality information indicating communication quality at the reference position, and the movement of the moving body. Among the standard communication quality information at the reference position included in the planned travel section after receiving the radio wave map request including the movement section information indicating the planned section and the required communication quality information indicating the required communication quality.
- the amount of information of the standard communication quality information equal to or higher than the required communication quality information is compared with the amount of information of the standard communication quality information equal to or lower than the required communication quality information.
- a radio wave map reply is generated based on the quality information and the provided reference position information which is the reference position information corresponding to the reference communication quality information, and the radio wave map reply is transmitted.
- the radio wave map providing program is a radio wave map providing program that can be executed by a radio wave map providing device that receives a radio wave map request from a radio wave map acquisition and utilization device mounted on a moving body and transmits necessary information.
- the radio wave map providing device is provided with a radio wave map storage unit that stores a radio wave map having reference position information indicating a reference position and reference communication quality information indicating communication quality at the reference position, and is of the moving body.
- reference position information indicating a reference position and reference communication quality information indicating communication quality at the reference position and is of the moving body.
- the information amount of the standard communication quality information equal to or higher than the required communication quality information is compared with the information amount of the standard communication quality information equal to or lower than the required communication quality information.
- a radio wave map reply is generated based on the communication quality information and the provided reference position information which is the reference position information corresponding to the reference communication quality information, and the radio wave map reply is transmitted.
- FIG. 1 is a diagram showing an overall configuration of an embodiment of the present disclosure.
- FIG. 2 is a block diagram showing a configuration example of the radio wave map providing device of the first embodiment.
- FIG. 3 is a diagram illustrating reference position information and reference communication quality information included in the radio wave map reply of the present disclosure.
- FIG. 4 is a flowchart showing the operation of the radio wave map providing device of the first embodiment.
- FIG. 5 is a block diagram showing a configuration example of the radio wave map providing device of the second embodiment.
- FIG. 6 is a flowchart showing the operation of the radio wave map providing device of the second embodiment.
- FIG. 7 is a flowchart showing the operation of the radio wave map providing device of the second embodiment.
- FIG. 1 is a diagram showing an overall configuration of an embodiment of the present disclosure.
- FIG. 2 is a block diagram showing a configuration example of the radio wave map providing device of the first embodiment.
- FIG. 3 is a diagram illustrating reference position information and reference communication quality information included in the radio wave
- FIG. 8 is a diagram illustrating reference position information and reference communication quality information included in the radio wave map reply of the first modification of the first and second embodiments.
- FIG. 9 is a diagram illustrating reference position information and reference communication quality information included in the radio wave map reply of the modified examples 4 of the first and second embodiments.
- the configuration and method described in the dependent clause of the claims are arbitrary configurations and methods 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 when the description of the claims is broader 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 either case, by describing in the independent clause of the claims, it becomes an essential 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 server device A corresponds to the radio wave map providing device of each embodiment, stores the radio wave map, and transmits the radio wave map via the communication network in response to the radio wave map request from the in-vehicle device B.
- the radio wave map stored in the server device A is created by an arbitrary method, and the method of creating the radio wave map is not described in the present specification.
- the server device A may have a function as a radio wave map generation device in addition to the function as a radio wave map providing device.
- Wireless communication methods include, for example, IEEE802.11 (Wi-Fi (registered trademark)), IEEE802.16 (WiMAX (registered trademark)), W-CDMA (Wideband Code Division Multiple Access), HSPA (High Speed Packet Access), and so on.
- LTE LongTermEvolution
- LTE-A LongTermEvolutionAdvanced
- DSRC Dedicated Short Range Communication
- the communication network may be a combination of a wireless communication method and a wired communication method.
- the in-vehicle device B and the base station in the cellular system may be connected by a wireless communication method, and the base station may be connected by a main line of a telecommunications carrier or a wired communication method such as the Internet.
- the in-vehicle device B "mounted" on the vehicle which is a "mobile body” corresponds to the radio wave map acquisition and utilization device of each embodiment.
- the in-vehicle device B transmits a radio wave map request to the server device A via the communication network, and receives a radio wave map reply, which is information according to the content of the radio wave map request, from the server device A via the communication network.
- the in-vehicle device B receives a positioning signal from the GNSS satellite and acquires the position information of the vehicle.
- the vehicle-mounted device B further uses the radio wave map reply transmitted from the server device A to transmit various data acquired by the vehicle to the server device C.
- the server device C is a data storage device that stores data transmitted from the vehicle-mounted device B.
- a “moving body” is 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. "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 with the moving body. For example, it may be possessed by a person in a moving body, or it may be mounted on a cargo placed on the moving body.
- Embodiment 1 (1) Configuration of Radio Map Providing Device 10 The configuration of the radio wave map providing device 10 of the first embodiment will be described with reference to FIG.
- the radio wave map providing device 10 includes a radio wave map storage unit 101, a reception unit 102, a transmission unit 103, and a control unit 104.
- the control unit 104 realizes the radio wave map extraction unit 105 and the radio wave map reply generation unit 106 by itself, and controls the operations of the radio wave map storage unit 101, the reception unit 102, and the transmission unit 103.
- the radio wave map providing device 10 is composed of a general-purpose CPU (Central Processing Unit), volatile memory such as RAM, non-volatile memory such as ROM, flash memory, or hard disk, various interfaces, and an internal bus connecting them. Can be done. 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 radio wave map providing device 10 may be realized by dedicated hardware such as an LSI. The same applies to the radio wave map providing device of the second and subsequent embodiments.
- a general-purpose CPU Central Processing Unit
- volatile memory such as RAM
- non-volatile memory such as ROM, flash memory, or hard disk
- various interfaces such as RAM
- internal bus connecting them such as RAM
- the radio wave map providing device 10 may be realized by dedicated hardware such as an LSI. The same applies to the radio wave map providing device of the second and subsequent embodiments.
- the radio wave map providing device 10 assumes the form of an electronic control unit (ECU (Electric Control Unit), hereinafter abbreviated as ECU) as a semi-finished product, but the present invention is not limited to this.
- ECU Electronic 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 radio wave map providing device 10 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 radio wave map storage unit 101 is a storage unit for storing radio wave maps, and is realized by a flash memory, a non-volatile memory such as a hard disk, or a volatile memory such as RAM. Further, a removable storage medium such as a BD, a DVD, or an SD card may be used.
- the radio wave map stored in the radio wave map storage unit 101 has reference position information indicating a reference position and reference communication quality information indicating communication quality at the reference position.
- the communication quality indicated by the reference communication quality information is, for example, an average bit rate (bps) or RSSI per unit time.
- the receiving unit 102 receives the radio wave map request transmitted from the radio wave map acquisition and utilization device 200.
- the radio wave map request indicates, for example, the current position information indicating the current position of the vehicle, the "moving section information" indicating the planned moving section in which the vehicle is scheduled to move in the future, and the communication quality required by the radio wave map acquisition and utilization device 200. Includes required communication quality information. For example, in the case of this embodiment, the following information is received as a radio wave map request.
- the "moving section information” may be any information indicating a certain range in which the moving body is scheduled to move. For example, in addition to the information indicating a plurality of consecutive points, two points (of the section). Information indicating a start point and an end point), or information indicating a combination of one point (start point or end point of a section) and a length may be used.
- the radio wave map request may include information other than those described above.
- the radio wave map request further includes request section information indicating a section requesting the radio wave map.
- the movement section information may indicate a part of the travel route on which the vehicle plans to move, such as every 10 m or every 100 m.
- the radio wave map extraction unit 105 acquires reference position information and standard communication quality information indicating a reference position included in the planned movement section of the vehicle from the radio wave map storage unit 101.
- the radio wave map reply generation unit 106 has the information amount of the standard communication quality information of the required communication quality information “or more” and the standard communication of the required communication quality information “less than or equal to” among the standard communication quality information acquired by the radio wave map extraction unit 105. "Compare” with the amount of quality information. Then, as a result of comparison, a radio wave map reply is generated "based on” the reference communication quality information having a small amount of information and the reference position information corresponding to the reference communication quality information having a small amount of information.
- the standard communication quality information having a small amount of information is referred to as “provided standard communication quality information”.
- the reference position information corresponding to the "provided standard communication quality information” is referred to as "provided reference position information”.
- “greater than or equal to” and “less than or equal to” include both the case where the same value as the “required communication quality information” to be compared is included and the case where the same value is not included.
- the “comparison” means not only directly comparing the amount of information of the standard communication quality information, but also indirectly comparing the amount of information of the standard communication quality information by comparing other things. "Based on” is the case where the provided reference position information and the provided standard communication quality information are generated as they are as a radio wave map reply, and in addition, only a part of the provided reference position information and the provided standard communication quality information is used. Alternatively, a radio wave map reply may be generated by performing an operation on these information.
- the radio wave map reply generation unit 106 may, for example, have a section of the reference position indicated by the reference position information corresponding to the reference communication quality information higher than the required communication quality information and the reference position information corresponding to the reference communication quality information below the required communication quality information.
- the amount of information of the reference communication quality information may be compared by comparing with the section of the reference position indicated by.
- the distance of the section of the reference position may not be proportional to the amount of information of the reference communication quality information. In such a case, it is desirable to directly compare the amount of standard communication quality information.
- FIG. 3 graphically shows the relationship between the reference position included in the planned movement section and the communication speed [Mbps] which is the reference communication quality information at the reference position.
- the required communication quality information is 1 Mbps.
- FIG. 3 it is assumed that the particle size of the information on the radio wave map is constant regardless of the position.
- the section a in FIG. 3 is a section in which the communication speed, which is the standard communication quality information, is 1 Mbps or less, and the section b is a section in which the communication speed is 1 Mbps or more.
- the radio wave map reply generation unit 106 uses the reference position information indicating the reference position included in the section a as the provision reference position information and the reference communication quality information in the section a as the provision reference communication quality information, and includes these as the radio wave map. Generate a reply.
- the radio wave map reply may be generated "based on" the provision reference position information and the provision standard communication quality information, and may not include the provision reference position information and the provision standard communication quality information as they are.
- the radio wave map reply generation unit 106 may calculate an average value of the provision standard communication quality information and generate a radio wave map reply including the calculated average value.
- the radio wave map reply generation unit 106 may generate a radio wave map reply including only a part of the provision reference position information and the provision reference communication quality information.
- the radio wave map reply generation unit 106 may further adjust the particle size of the information included in the radio wave map reply according to the moving speed at which the vehicle moves in the planned movement section. For example, when the moving speed of the vehicle is slow, the vehicle travels in the planned moving section for a long time, and there are many opportunities to communicate within the planned moving section. Therefore, it is desirable to control communication using a radio wave map with a small particle size, that is, a more detailed radio wave map. On the other hand, when the moving speed of the vehicle is high, it is highly possible that the radio wave map having a small particle size is not required because the time during which the vehicle travels in the planned moving section is short.
- the faster the vehicle moves in the planned movement section the larger the particle size of the provision reference position information and the provision reference communication quality information is to generate a radio wave map reply.
- a radio map reply including the provision reference position information and the provision standard communication quality information is generated, and when the moving speed of the vehicle is 60 km / h, the provision is provided every 10 m.
- a reference value for the moving speed is set in advance, a radio wave map reply of the first particle size is generated when the moving speed is equal to or higher than the reference value, and a first particle size is generated when the moving speed is equal to or less than the reference value.
- a second grain size radio map reply smaller than may be generated.
- the radio wave map reply generation unit 106 may acquire the moving speed of the vehicle included in the radio wave map request.
- the radio wave map reply generation unit 106 estimates the moving speed of the vehicle based on the legal speed of the planned moving section and the degree of congestion of the road in the section, and adjusts the particle size by using the estimated moving speed. You may.
- the transmission unit 103 transmits the radio wave map reply generated by the radio wave map reply generation unit 106 to the radio wave map acquisition and utilization device 200.
- the following information is transmitted as a radio wave map reply.
- Time stamp Time when the radio wave map included in the radio wave map reply was generated
- Provided reference position information Latitude / longitude altitude of the reference position or ID representing the grid points on the map
- the radio wave map acquisition and utilization device 200 uses the received radio wave map reply to perform transmission control when transmitting various data acquired by the vehicle. For example, when the radio wave map reply including the provision reference position information and the provision reference communication quality information corresponding to the section a in FIG. 3 is received, the radio wave map acquisition and utilization device 200 cannot obtain the required communication quality in the section a. As a result, it can be determined that the required communication quality can be obtained in the section other than the section a. Therefore, for example, communication is scheduled so that data having a small capacity is transmitted in the section a and data having a large capacity such as image data is transmitted in a section other than the section a.
- Radio Map Providing Device 10 The operation of the radio wave map providing device 10 of the present embodiment will be described with reference to FIG. The following operation not only shows the radio wave map providing method executed by the radio wave map providing device 10, but also shows the processing procedure of the radio wave map providing program that can be executed by the radio wave map providing device 10. 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 same applies to the operation of the radio wave map providing device of the second and subsequent embodiments.
- the receiving unit 102 receives a radio wave map request including current position information, moving section information, and requested communication quality information from the radio wave map acquisition and utilization device 200 (S101).
- the radio wave map extraction unit 105 acquires the reference position information included in the planned movement section and the corresponding reference communication quality information from the radio wave map storage unit 101 (S102).
- the radio wave map reply generation unit 106 determines the amount of standard communication quality information equal to or higher than the required communication quality information and the amount of standard communication quality information equal to or higher than the required communication quality information. Compare (S103).
- the radio wave map reply generation unit 106 generates a radio wave map reply based on the reference communication quality information having a small amount of information and the reference position information corresponding to the reference communication quality information (S104).
- the transmission unit 103 transmits the radio wave map reply generated in S104 to the radio wave map acquisition / utilization device 200 (S105).
- the communication quality information that is equal to or lower than the communication quality required by the radio wave map acquisition / utilization device and the radio wave map reply generated based on the position information are generated. And send it to the radio wave map acquisition and use device. This makes it possible to suppress the amount of communication between the radio wave map providing device and the radio wave map acquisition / using device while providing the information necessary for the radio wave map acquisition / using device to control the transmission of data.
- Embodiment 2 In this embodiment, a configuration capable of further suppressing the amount of data transmitted / received between the radio wave map providing device and the radio wave map acquisition / utilization device will be described.
- FIG. 5 shows the radio wave map providing device 20 of the present embodiment.
- the radio wave map providing device 20 includes a radio wave map reply storage unit 107 and a position determination unit 108 in addition to each configuration of the radio wave map providing device 10 shown in FIG.
- the radio wave map reply generation unit 106 of the present embodiment generates two radio wave map replies (hereinafter, a first radio wave map reply and a second radio wave map reply).
- the first radio wave map reply is a radio wave map reply that includes the provision reference position information and does not include the provision reference communication quality information among the information acquired by the radio wave map extraction unit 105.
- the second radio wave map reply includes both the provision reference position information and the provision reference communication quality information.
- the radio wave map reply generation unit 106 does not necessarily have to generate the first radio wave map reply.
- the position determination unit 108 which will be described later, determines that the distance from the current position indicated by the current position information of the vehicle included in the radio wave map request to the reference position indicated by the provided reference position information is equal to or less than a predetermined threshold, the radio wave is transmitted.
- the map reply generation unit 106 may not generate the first radio wave map reply, but may generate only the second radio wave map reply.
- the radio wave map reply storage unit 107 temporarily stores the radio wave map reply until the radio wave map reply generated by the radio wave map reply generation unit 106 is transmitted from the transmission unit 103 to the radio wave map acquisition / utilization device 200.
- the radio wave map reply storage unit 107 may be realized by a volatile memory such as RAM in addition to a non-volatile memory such as a flash memory or a hard disk.
- the position determination unit 108 determines whether or not the "interval" from the current position of the vehicle indicated by the current position information to the reference position indicated by the provided reference position information is equal to or greater than a predetermined threshold value.
- the reference position indicated by the provided reference position information may be, for example, a reference position indicating the start point or the end point of the section a shown in FIG. 3, or may be a reference position indicating the center of the section a.
- the transmission unit 103 transmits the first radio wave map reply or the second radio wave map reply based on the determination result of the position determination unit 108.
- the transmission unit 103 transmits the first radio wave map reply when the "interval" from the current position of the vehicle to the reference position indicated by the provided reference position information is equal to or greater than a predetermined threshold value. ..
- the transmission unit 103 transmits the second radio wave map reply.
- the “interval” includes not only the position indicated by the current position information and the position and distance indicated by the provided reference position information, but also the time required from the position indicated by the current position information to the position indicated by the provided reference position information.
- the first radio wave map reply is transmitted.
- the time required for the vehicle to reach the reference position indicated by the provided reference position information is estimated from the current position of the vehicle, and the estimated time is longer than the preset time threshold.
- the radio wave map reply of 1 may be transmitted.
- the receiving unit 102 of the present embodiment receives the position information indicating the current position of the vehicle from the radio wave map acquisition and utilization device 200 (“second current position information”). It is desirable to receive "corresponding to" regularly. This position corresponds to the new current position of the vehicle (corresponding to the "second current position") moved from the vehicle's current position (corresponding to the "first current position") indicated by the current position information included in the radio map request. ) Is shown.
- the position determination unit 108 sets an "interval" from the position indicated by the current position information after the movement to the reference position indicated by the provided reference position information. It is determined whether or not it is equal to or higher than a predetermined threshold value. Then, when the interval from the current position to the reference position after movement becomes equal to or less than a predetermined threshold value, the transmission unit 103 transmits the second radio wave map reply.
- the receiving unit 102 of the present embodiment may receive change information indicating that the planned movement section of the vehicle has changed.
- the vehicle's travel route may change depending on occupants and road conditions. In that case, since the planned travel section changes as the vehicle travel route changes, the information contained in the radio map reply generated based on the travel schedule section before the travel route change may not be used. high. Therefore, when there is a change in the planned movement section of the vehicle, the radio wave map acquisition / utilization device 200 transmits the change information to the radio wave map providing device 20.
- the receiving unit 102 When the receiving unit 102 receives the change information from the radio wave map acquisition / utilization device 200, it is not necessary to transmit the second radio wave map reply. Therefore, the second radio wave map reply stored in the radio wave map reply storage unit 107 is deleted.
- the position determination unit 108 determines whether or not the distance from the current position of the vehicle indicated by the current position information to the reference position indicated by the provided reference position information is equal to or greater than a predetermined threshold value (S201). When the determination result of S201 is equal to or less than a predetermined threshold value (S201: No), the radio wave map reply generation unit 106 generates a second radio wave map reply (S202). The transmission unit 103 transmits the second radio wave map reply generated in S202 (S203).
- the radio wave map reply generation unit 106 when the determination result of S201 is equal to or higher than a predetermined threshold value (S201: Yes), the radio wave map reply generation unit 106 generates a first radio wave map reply and a second radio wave map reply (S204).
- the transmission unit 103 transmits the first radio wave map reply generated in S204 to the radio wave map acquisition / utilization device 200 (S205).
- the radio wave map reply storage unit 107 stores the second radio wave map reply generated in S204 (S206).
- FIG. 7 shows a process that is periodically performed after the process of S206. It is determined whether or not the receiving unit 102 has received the change information (S210). When the change information is received (S210: Yes), the second radio wave map reply stored in the radio wave map reply storage unit 107 is deleted (S211). On the other hand, when the change information is not received (S210: No), it is determined whether or not the current position information of the moved vehicle is received from the radio wave map acquisition / utilization device 200 (S212). When the current position information of the vehicle after movement is received (S212: Yes), the position determination unit 108 is from the current position indicated by the current position information of the vehicle after movement to the reference position indicated by the provided reference position information.
- the radio wave map acquisition and utilization device 200 when the vehicle approaches the reference position indicated by the provided reference position information, the radio wave map acquisition and utilization device 200 receives the second radio wave map reply transmitted from the radio wave map providing device 20. Provision standard Communication quality information can be obtained. However, if the vehicle is close to the reference position indicated by the provided reference position information but the second radio wave map reply cannot be received, the radio wave map acquisition and utilization device 200 transmits the radio wave map request again. It may be configured to be used.
- the traveling route may be changed before the vehicle arrives at the reference position. If the travel route is changed, the radio map reply information corresponding to the original travel route is not used. Therefore, there is a possibility that the radio wave map reply information transmitted / received when the vehicle is far from the current position to the reference position may become unnecessary, and as a result, unnecessary radio wave map reply communication is performed. Therefore, in the present embodiment, when the current position of the vehicle is far from the reference position, a radio wave map reply including only the position information is transmitted, and the communication quality information is transmitted when the current position of the vehicle approaches the provided reference position. do. In this way, by transmitting the radio wave map reply step by step according to the distance between the current position of the vehicle and the reference position, it is possible to minimize unnecessary data communication.
- Modification Example This section describes a modification of the radio wave map reply generated by the radio wave map reply generation unit 106 and provided to the radio wave map acquisition and utilization device 200. The following modifications can be applied to any of the first and second embodiments, but examples of application to the first embodiment will be described.
- Modification 1 a configuration in which a section having a certain range and communication quality information as a representative value in the section are transmitted as a radio wave map reply will be described.
- FIG. 8 is a diagram showing the relationship between the reference position information in this modification and the communication speed [Mbps] which is the reference communication quality information. Similar to FIG. 3, the required communication quality information is 1 Mbps. Unlike FIG. 3, the radio wave map shown in FIG. 8 divides each reference position into a plurality of sections in advance, and the reference position information indicates the section. Further, the standard communication quality information shows a representative value of communication quality in each section. This section is a section from a specific reference position (corresponding to the "first reference position") to another reference position (corresponding to the "second reference position").
- the sections above or below the required communication quality information are defined as sections a and b, respectively, but in this modification, the reference position is divided into a plurality of sections in advance regardless of the required communication quality information. It differs from FIG. 3 in that it is different from FIG.
- This section is divided, for example, at a point where the rate of change between the communication quality at the reference position and the communication quality at the adjacent reference position becomes larger than a preset predetermined rate of change.
- the section may be divided at a point where the base station connected by wireless communication between the radio wave map providing device 10 and the radio wave map acquisition and utilization device 200 changes.
- the sections that are the standard communication quality information above the required communication quality information are sections A, C, D, and E, and the sections that are the standard communication quality information below the required communication quality information are only the sections B. be. Therefore, the amount of information of the standard communication quality information in the section B is smaller than the amount of information of the standard communication quality information in the sections A, C, D, and E.
- the radio wave map reply generation unit 106 of the present embodiment receives reference communication quality information having a small amount of information, that is, reference communication quality information indicating a representative value of communication quality in section B, and reference position information indicating section B. Generate a radio map reply that includes.
- the radio wave map storage unit 101 may store a radio wave map having reference position information indicating a section and reference communication quality information which is a representative value of communication quality in each section, but the radio wave map storage unit 101 may store the radio wave map.
- the reference position information indicating each reference position and the communication quality information indicating the communication quality at the reference position are stored, and when the moving section information included in the radio wave map request is received.
- the planned movement section may be divided into a plurality of sections.
- the reference position is divided into a plurality of sections according to the section in which the planned movement section is divided, and the representative value of the communication quality of each section is calculated.
- the moving section information is divided into a plurality of sections, for example, as described above, the moving section information is divided into a plurality of sections according to the rate of change in communication quality and the connected base station.
- a radio wave map reply including reference position information indicating a section and reference communication quality information which is a representative value of communication quality information of the section is transmitted. It is transmitted to the map acquisition and utilization device 200. This makes it possible to significantly reduce the amount of communication between the radio wave map providing device 10 and the radio wave map acquisition / utilization device 200.
- the radio wave map reply generation unit 106 of this modification calculates the scheduled time for the vehicle to move to the reference position indicated by the reference position information acquired by the radio wave map extraction unit 105.
- the radio wave map reply generation unit 106 may calculate, for example, the scheduled time for the vehicle to move to the reference position based on the moving speed of the vehicle included in the radio wave map request and the legal speed in the scheduled moving section.
- the radio wave map reply generation unit 106 generates a radio wave map reply including the scheduled time information indicating the calculated scheduled time and the reference communication quality information indicating the communication quality at the scheduled time.
- the radio wave map acquisition and utilization device 200 When the radio wave map acquisition and utilization device 200 receives the radio wave map reply including the reference position information and the reference communication quality information, it calculates the time when the vehicle travels in the reference position and schedules the communication based on the calculated time. .. Therefore, instead of the radio wave map acquisition and utilization device 200, the radio wave map providing device 10 calculates the scheduled time for the vehicle to travel in the reference position, and transmits the radio wave map reply including the scheduled time information and the reference communication quality information. Since it is not necessary to convert the position information into the time information on the radio wave map acquisition / use device 200 side, it is possible to reduce the processing load on the radio wave map acquisition / use device 200.
- the radio wave map reply generation unit 106 of this modification has the information amount of the standard communication quality information equal to or higher than the required communication quality information among the standard communication quality information acquired by the radio wave map extraction unit 105, and the required communication. Quality information Compare with the following standard communication quality information amount.
- the radio wave map reply is generated based on the provision standard communication quality information which is the standard communication quality information with a small amount of information and the provision reference position information corresponding to the standard communication quality information.
- the radio wave map reply generation unit 106 of the example further generates a radio wave map reply in the past based on the same information as the provision standard communication quality information and the provision reference position information extracted this time, and another radio wave map reply is transmitted from the transmission unit 103 to another. It is determined whether or not the information has been transmitted to the vehicle (corresponding to the "second moving object").
- the radio wave map reply generation unit 106 determines the radio wave map reply (“first) based on the provision reference communication quality information and the provision reference position information. Generates a radio wave map reply (corresponding to).
- the radio wave map reply generation unit 106 instructs to acquire the radio wave map reply from the vehicle to which the radio wave map reply is transmitted. Generate a radio wave map reply (corresponding to "second radio wave map reply").
- the radio wave map reply may include identification information indicating a destination device or vehicle to which the transmission unit 103 has transmitted the radio wave map reply in the past.
- the radio wave map providing device 10 when the radio wave map providing device 10 has already transmitted the information required by the radio wave map acquisition and utilization device 200 to another device, the radio wave map reply is acquired from the other device. Generates and sends a radio map reply instructing you to do so.
- the radio wave map acquisition and utilization device 200 When the radio wave map acquisition and utilization device 200 has the information of the radio wave map reply required by the radio wave map acquisition and utilization device 200, the radio wave map acquisition and utilization device 200 is from the other device, for example, via vehicle-to-vehicle communication or Wi-Fi. By acquiring the radio wave map reply, the communication cost can be suppressed.
- a delay deadline is set for the data scheduled to be transmitted from the radio wave map acquisition and use device 200, it is necessary to complete the data transmission within the delay deadline. However, in the planned movement section where the vehicle is scheduled to move within the delay deadline, if the section where the standard communication quality of the radio wave map exceeds the required communication quality is short, the data transmission may not be completed within the delay deadline. ..
- the radio wave map providing device 10 moves the vehicle within the delay deadline based on the amount of data scheduled to be transmitted from the radio wave map acquisition and utilization device 200 and the delay deadline set for the data scheduled to be transmitted. It is determined whether or not the data transmission can be completed within the section where the standard communication quality of the radio wave map is equal to or higher than the required communication quality among the sections scheduled to be moved. Then, when it is determined that the data transmission is not completed within the section where the standard communication quality is equal to or higher than the required communication quality, the radio wave map acquisition and utilization device 200 transmits the data so that the data transmission is completed within the delay period.
- the planned movement section is divided into a section to be executed and a section to not execute data transmission.
- FIG. 9 is a diagram showing the relationship between the reference position information in this modification and the communication speed [Mbps] which is the reference communication quality information. Similar to FIG. 3, the required communication quality information is 1 Mbps. Further, the section x in which the vehicle moves by the delay deadline is shown. Within the section x, the section in which the standard communication quality information is equal to or less than the required communication quality information is shorter than the section in which the standard communication quality information is equal to or greater than the required communication quality information. Therefore, according to the configuration of the first embodiment described above, the radio wave map reply is generated by providing the standard communication quality information equal to or lower than the required communication quality as the standard communication quality information.
- the radio wave map providing device 10 of this modification the planned movement section (section x) in which the vehicle moves within the delay period, the section y in which the radio wave map acquisition and utilization device 200 executes data transmission, and the data transmission Is divided into the section z that does not execute.
- the section y is divided so as to be a section in which the entire amount of data to be transmitted can be transmitted.
- the section y also includes a section in which the standard communication quality information is equal to or less than the required communication quality information.
- the radio wave map reply generation unit 106 of this modification compares the amount of information of the reference communication quality information in the section y with the amount of information of the reference communication quality information in the section z, and obtains the reference communication quality information having a small amount of information. , Generates a radio wave map reply based on the reference position information corresponding to the reference communication quality information with a small amount of information.
- the radio wave map providing device 10 provides the radio wave map providing device and the radio wave map acquisition while providing the radio wave map information necessary for the radio wave map acquisition and utilization device 200 to transmit data within the delay period. It is possible to suppress the amount of communication with the user device.
- the block diagram used in the explanation of the embodiment is a classification and arrangement of the configuration of the device according to the 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.
- the radio wave map providing device of each embodiment is premised on providing a radio wave map to a radio wave map acquisition and utilization device mounted on a vehicle, but the present disclosure discloses a radio wave map unless otherwise limited within the scope of the request.
- the radio wave map may be provided to any device that utilizes.
- Examples of the form of the component include a semiconductor element, an electronic circuit, a module, and a microcomputer.
- Examples of the form of the semi-finished product include an electronic control unit (ECU (Electric Control Unit)) 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.
- radio wave map providing device of the present disclosure is 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 a general-purpose hardware having an executable dedicated or general-purpose CPU and 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 (for example, 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 radio wave map providing device of the present disclosure has been described as a server device that provides a radio wave map to a radio wave map acquisition and utilization device that is an in-vehicle device. It can be applied to any device that communicates with a moving mobile body.
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Abstract
Description
自動車等の移動体は、地点と通信資源量との対応関係を示す通信資源マップを有する装置から、移動を予定している地点の通信資源マップの提供を予め受けることによって、フェージングを考慮して通信をスケジューリングすることができる。ところが、自動車等が移動を予定している経路全体のマップを送受信する場合、通信量が膨大になるおそれがある。さらに、自動車等の経路は道路や乗員の状況に応じて適宜変化するため、経路が変更される度に新しいマップの提供を受けると、マップの送受信に要する通信量はさらに増加する。
図1を用いて、本実施形態で関係する機器及びこれらの相互関係を示す全体構成をまず説明する。
“搭載された”とは、移動体に直接固定されている場合の他、移動体に固定されていないが移動体と共に移動する場合も含む。例えば、移動体に乗った人が所持している場合、移動体に載置された積荷に搭載されている場合、が挙げられる。
(1)電波マップ提供装置10の構成
図2を用いて、実施形態1の電波マップ提供装置10の構成について説明する。
なお、電波マップ提供装置10は、単一のECUの他、複数のECUで構成されてもよい。例えば、外部との通信を通信ECUが担当するようにしてもよい。
現在位置情報:車両の現在位置の緯度経度高度又は地図上の格子点を表すID
移動区間情報:車両の移動予定区間を示す複数の座標情報
要求通信品質情報:要求する通信速度[Mbps]
“比較”とは、基準通信品質情報の情報量を直接的に比較することはもちろん、他のものを比較することによって間接的に基準通信品質情報の情報量を比較してもよい。
“基づいて”生成する、とは、提供基準位置情報及び提供基準通信品質情報をそのまま電波マップリプライとして生成する場合の他、提供基準位置情報及び提供基準通信品質情報の一部のみを用いて、又は、これらの情報に演算を行って電波マップリプライを生成してもよい。
タイムスタンプ:電波マップリプライに含まれる電波マップが生成された時刻
提供基準位置情報:基準位置の緯度経度高度又は地図上の格子点を表すID
提供基準通信品質情報:基準位置での通信速度[Mbps]
図4を用いて、本実施形態の電波マップ提供装置10の動作を説明する。なお、以下の動作は、電波マップ提供装置10で実行される電波マップ提供方法を示すだけでなく、電波マップ提供装置10で実行可能な電波マップ提供プログラムの処理手順を示すものである。そして、これらの処理は、図4で示した順序には限定されない。すなわち、あるステップでその前段のステップの結果を利用する関係にある等の制約がない限り、順序を入れ替えてもよい。実施形態2以降の電波マップ提供装置の動作についても同じである。
電波マップ抽出部105は、電波マップ保存部101から、移動予定区間に含まれる基準位置情報、及びそれに対応する基準通信品質情報を取得する(S102)。
電波マップリプライ生成部106は、S102で取得した基準通信品質情報のうち、要求通信品質情報以上の基準通信品質情報の情報量と、要求通信品質情報以上の基準通信品質情報の情報量と、を比較する(S103)。
電波マップリプライ生成部106は、S103で比較した結果、情報量が小さい基準通信品質情報と、その基準通信品質情報に対応する基準位置情報に基づいて、電波マップリプライを生成する(S104)。
送信部103は、S104で生成された電波マップリプライを電波マップ取得利用装置200に送信する(S105)。
本実施形態では、電波マップ提供装置と電波マップ取得利用装置の間で送受信されるデータの通信量をさらに抑制することが可能な構成を説明する。
図5は、本実施形態の電波マップ提供装置20を示している。電波マップ提供装置20は、図2に示す電波マップ提供装置10の各構成に加えて、電波マップリプライ保存部107及び位置判定部108を備えている。
車両の走行経路は、乗員や道路の状況によって変更されることがある。その場合、車両の走行経路の変更に伴って移動予定区間も変化するため、走行経路が変更される前の移動予定区間に基づいて生成された電波マップリプライに含まれる情報は使用しない可能性が高い。そこで、車両の移動予定区間に変更があった場合には、電波マップ取得利用装置200は変更情報を電波マップ提供装置20に送信する。
図6、7を用いて、本実施形態の電波マップ提供装置20の動作を説明する。図4と同じ処理については、説明を省略する。
S201の判定結果が所定の閾値以下である場合(S201:No)、電波マップリプライ生成部106は第2の電波マップリプライを生成する(S202)。
送信部103は、S202で生成された第2の電波マップリプライを送信する(S203)。
送信部103は、S204で生成された第1の電波マップリプライを電波マップ取得利用装置200に送信する(S205)。
電波マップリプライ保存部107は、S204で生成された第2の電波マップリプライを保存する(S206)。
受信部102が変更情報を受信しているかどうかを判定する(S210)。
変更情報を受信した場合(S210:Yes)、電波マップリプライ保存部107に保存された第2の電波マップリプライを削除する(S211)。
一方、変更情報を受信していない場合(S210:No)、電波マップ取得利用装置200から、移動後の車両の現在位置情報を受信したかどうかを判定する(S212)。
移動後の車両の現在位置情報を受信している場合(S212:Yes)、位置判定部108は、移動後の車両の現在位置情報が示す現在位置から、提供基準位置情報が示す基準位置までの間隔が、所定の閾値以上であるかどうかを判定する(S213)。
S213での判定結果が所定の閾値以下である場合(S213:No)、電波マップリプライ保存部107に保存された第2の電波マップリプライを送信する(S214)。
そこで、本実施形態では、車両の現在位置から基準位置までが遠い場合には位置情報のみを含む電波マップリプライを送信し、車両の現在位置が提供基準位置に接近した時点で通信品質情報を送信する。このように、電波マップリプライを、車両の現在位置と基準位置の間隔に応じて段階的に送信することにより、不要なデータ通信を最小限に抑制することが可能となる。
本項では、電波マップリプライ生成部106で生成され、電波マップ取得利用装置200に提供される電波マップリプライの変形例を説明する。なお、以下の変形例は実施形態1、2のいずれにも適用することができるが、実施形態1に適用する例を挙げて説明する。
本変形例では、一定の範囲を有する区間と、当該区間における代表値としての通信品質情報と、を電波マップリプライとして送信する構成を説明する。
本変形例では、基準位置情報に代えて、車両が基準位置を走行する予定時刻を電波マップリプライとして送信する構成を説明する。
本変形例では、基準位置情報及び基準通信品質情報に代えて、他車両からこれらの情報を取得する指示を電波マップリプライとして送信する構成を説明する。
本変形例では、電波マップ取得利用装置200が送信する予定のデータに遅延期限が設定されている場合の構成を説明する。
以上、本開示の各実施形態における電波マップ提供装置の特徴について説明した。
部品の形態として、半導体素子、電子回路、モジュール、マイクロコンピュータが挙げられる。
半完成品の形態として、電子制御装置(ECU(Electric Control Unit))、システムボードが挙げられる。
完成品の形態として、携帯電話、スマートフォン、タブレット、パーソナルコンピュータ(PC)、ワークステーション、サーバが挙げられる。
その他、通信機能を有するデバイス等を含み、例えばビデオカメラ、スチルカメラ、カーナビゲーションシステムが挙げられる。
Claims (10)
- 移動体に搭載された電波マップ取得利用装置(200)から電波マップリクエストを受信して必要な情報を送信する電波マップ提供装置であって、
基準位置を示す基準位置情報、及び前記基準位置での通信品質を示す基準通信品質情報を有する電波マップを保存する電波マップ保存部(101)と、
前記移動体の移動予定区間を示す移動区間情報、及び要求する通信品質を示す要求通信品質情報、を含む前記電波マップリクエストを受信する受信部(102)と、
前記移動予定区間に含まれる前記基準位置での前記基準通信品質情報のうち、前記要求通信品質情報以上の基準通信品質情報の情報量と、前記要求通信品質情報以下の基準通信品質情報の情報量とを比較し、前記情報量が小さい前記基準通信品質情報である提供基準通信品質情報と、前記基準通信品質情報に対応する基準位置情報である提供基準位置情報とに基づいて電波マップリプライを生成する電波マップリプライ生成部(106)と、
前記電波マップリプライを送信する送信部(103)と、
を備える、電波マップ提供装置(10,20)。 - 前記電波マップリクエストはさらに、前記移動体の現在位置を示す現在位置情報を含み、
前記電波マップリプライ生成部は、
前記提供基準位置情報を含む第1の電波マップリプライ、又は前記提供基準位置情報と前記提供基準通信品質情報とを含む第2の電波マップリプライを生成し、
前記送信部は、前記現在位置から前記提供基準位置情報が示す前記基準位置までの間隔が所定の閾値以上の場合、前記第1の電波マップリプライを送信し、前記現在位置から前記提供基準位置情報が示す前記基準位置までの前記間隔が前記所定の閾値以下の場合、前記第2の電波マップリプライを送信する、
請求項1記載の電波マップ提供装置(20)。 - 前記受信部はさらに、前記現在位置である第1の現在位置から移動した前記移動体の第2の現在位置を示す第2の現在位置情報を前記電波マップ取得利用装置から受信し、
前記送信部は、前記第2の現在位置から前記提供基準位置情報が示す前記基準位置までの間隔が前記所定の閾値以下の場合、前記第2の電波マップリプライを送信する、
請求項2記載の電波マップ提供装置。 - 当該電波マップ提供装置はさらに、前記第2の電波マップリプライを保存する電波マップリプライ保存部(107)を備え、
前記受信部が前記電波マップ取得利用装置から前記移動予定区間の変更を示す変更情報を受信した場合、前記電波マップリプライ保存部に保存されている前記第2の電波マップリプライは削除される、
請求項2記載の電波マップ提供装置。 - 前記基準位置情報は、第1の基準位置から第2の基準位置までの区間を示しており、
前記基準通信品質情報は、前記区間における前記通信品質の代表値を示している、
請求項1記載の電波マップ提供装置。 - 前記電波マップリプライ生成部は、前記移動体が前記提供基準位置情報が示す前記基準位置を移動する予定時刻を算出するとともに、前記予定時刻を示す予定時刻情報と、前記提供基準通信品質情報と、を含む前記電波マップリプライを生成する、
請求項1記載の電波マップ提供装置。 - 前記電波マップリプライ生成部は、
前記送信部が、前記移動体である第1の移動体とは異なる第2の移動体に、前記提供基準位置情報及び前記提供基準通信品質情報に基づいて生成された前記電波マップリプライである第1の電波マップリプライを送信したかどうかを判定するとともに、
前記送信部が前記第1の電波マップリプライを送信していないと判定した場合、前記提供基準位置情報及び前記提供基準通信品質情報に基づいて前記第1の電波マップリプライを生成し、
前記送信部が前記第1の電波マップリプライを送信したと判定した場合、前記第2の移動体から前記第1の電波マップリプライを取得することを指示する第2の電波マップリプライを生成する、
請求項1記載の電波マップ提供装置。 - 前記電波マップリプライ生成部は、前記移動体が前記移動予定区間を移動する移動速度が速いほど、前記提供基準位置情報及び前記提供基準位置情報の粒度が大きい前記電波マップリプライを生成する、
請求項1記載の電波マップ提供装置。 - 移動体に搭載された電波マップ取得利用装置から電波マップリクエストを受信して必要な情報を送信する電波マップ提供装置で実行する電波マップ提供方法であって、
前記電波マップ提供装置は、基準位置を示す基準位置情報、及び前記基準位置における通信品質を示す基準通信品質情報を有する電波マップを保存する電波マップ保存部を備え、
前記移動体の移動予定区間を示す移動区間情報、及び要求する通信品質を示す要求通信品質情報、を含む前記電波マップリクエストを受信し、
前記移動予定区間に含まれる前記基準位置での前記基準通信品質情報のうち、前記要求通信品質情報以上の基準通信品質情報の情報量と、前記要求通信品質情報以下の基準通信品質情報の情報量とを比較し、
前記情報量が小さい前記基準通信品質情報である提供基準通信品質情報と、前記基準通信品質情報に対応する基準位置情報である提供基準位置情報とに基づいて電波マップリプライを生成し、
前記電波マップリプライを送信する、
電波マップ提供方法。 - 移動体に搭載された電波マップ取得利用装置から電波マップリクエストを受信して必要な情報を送信する電波マップ提供装置で実行可能な電波マップ提供プログラムであって、
前記電波マップ提供装置は、基準位置を示す基準位置情報、及び前記基準位置における通信品質を示す基準通信品質情報を有する電波マップを保存する電波マップ保存部を備え、
前記移動体の移動予定区間を示す移動区間情報、及び要求する通信品質を示す要求通信品質情報、を含む前記電波マップリクエストを受信し、
前記移動予定区間に含まれる前記基準位置での前記基準通信品質情報のうち、前記要求通信品質情報以上の基準通信品質情報の情報量と、前記要求通信品質情報以下の基準通信品質情報の情報量とを比較し、
前記情報量が小さい前記基準通信品質情報である提供基準通信品質情報と、前記基準通信品質情報に対応する基準位置情報である提供基準位置情報とに基づいて電波マップリプライを生成し、
前記電波マップリプライを送信する、
電波マップ提供プログラム。
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| JP2023118510A (ja) * | 2022-02-15 | 2023-08-25 | オムロン株式会社 | 走行装置 |
| JP2025076563A (ja) * | 2023-11-02 | 2025-05-16 | トヨタ自動車株式会社 | 情報処理装置 |
| CN120881513A (zh) * | 2024-04-29 | 2025-10-31 | 华为技术有限公司 | 无线电地图获取方法和装置 |
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| EP4258721A4 (en) | 2024-06-19 |
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