WO2014192264A1 - Vehicle-mounted communication device - Google Patents
Vehicle-mounted communication device Download PDFInfo
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- WO2014192264A1 WO2014192264A1 PCT/JP2014/002694 JP2014002694W WO2014192264A1 WO 2014192264 A1 WO2014192264 A1 WO 2014192264A1 JP 2014002694 W JP2014002694 W JP 2014002694W WO 2014192264 A1 WO2014192264 A1 WO 2014192264A1
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
- G08G1/096766—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission
- G08G1/096791—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission where the origin of the information is another vehicle
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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
- H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
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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]
- H04W4/48—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for in-vehicle communication
Definitions
- the present disclosure relates to an in-vehicle communication device that transmits and receives a wireless information signal for sharing information between users.
- in-vehicle communication devices are used as base stations for mobile communication networks in order to avoid congestion of communication traffic. It is considered that a configuration in which wireless information signals are transmitted and received using medium-distance wireless communication such as WiFi direct is more preferable than connecting to a network via a network.
- each in-vehicle communication device transmits and receives a wireless information signal including position information indicating the current position of the vehicle, and displays the current position of the main vehicle along with the current position of the main vehicle.
- the merge point where the main vehicle and other vehicles meet is calculated based on the position information, and the positional relationship of each vehicle is displayed when the main vehicle reaches this merge point.
- the thing to do is also considered (for example, refer patent document 1).
- each in-vehicle communication device must periodically transmit and receive a wireless information signal including position information in order to calculate a junction, for example, information on destinations and hobbies / preferences.
- a wireless information signal including position information in order to calculate a junction, for example, information on destinations and hobbies / preferences.
- communication may be interrupted or delayed when users share other information such as information that matches.
- This disclosure has been made in view of the above-described concerns and the like, and an object thereof is to provide an in-vehicle communication device that enables group traveling more comfortably.
- an in-vehicle communication device is mounted on a vehicle, and at least one other in-vehicle communication device mounted on another vehicle is in the middle.
- the wireless information signal for sharing information between users is transmitted and received, and a reception intensity detection section and a transmission control section are provided.
- the reception strength detection section detects the reception strength of signals transmitted from other in-vehicle communication devices, and the transmission control section is preset with the reception strength detected by the reception strength detection section. Only when the intensity falls below the first threshold intensity, the wireless information signal including the vehicle status information indicating the current status of the vehicle is transmitted.
- the lower the reception intensity of the signal transmitted from the other in-vehicle communication device the greater the distance between the main vehicle and the other vehicle, so when this distance increases, If the current situation can be communicated to the driver of the main vehicle, it is not necessary for users to periodically send and receive vehicle status information such as position information in a wireless information signal for sharing various information. Pay attention.
- the inter-vehicle communication system configured by mounting the in-vehicle communication device of this configuration on each vehicle for each user is often used when each user travels toward the same destination while paying attention to each other's position. Used. For this reason, each user can obtain the vehicle status of the other vehicle only when the other vehicle is far away from the main vehicle even if the vehicle status information of the other vehicle is not transmitted when the other vehicle exists around the main vehicle. If the information is transmitted, it is possible to perform an action (for example, driving such that the other vehicle approaches the main vehicle) according to the current situation of the other vehicle at that time.
- an action for example, driving such that the other vehicle approaches the main vehicle
- Wireless information signals including vehicle status information, otherwise, for example, information on destinations, information that matches hobbies / preferences, etc.
- Wireless information signals can be transmitted and received between users for the purpose of sharing other information, and group traveling can be performed more comfortably.
- the in-vehicle communication device of the present embodiment is mounted on each user's vehicle for the purpose of performing group traveling such that a plurality of users drive different vehicles and travel toward a destination, for example.
- a device that transmits and receives wireless information signals necessary for users to share various types of information such as information on destinations and information that matches hobbies and preferences.
- an in-vehicle communication device mounted on a user's vehicle (hereinafter referred to as a main vehicle) is referred to as a main in-vehicle communication device 10, and another user's vehicle (hereinafter referred to as another vehicle) in a group to which the user belongs.
- the other in-vehicle communication device mounted in the above is referred to as a sub-in-vehicle communication device 20.
- the main in-vehicle communication device 10 and the sub in-vehicle communication device 20 have the same configuration (the same function).
- a vehicle equipped with an in-vehicle communication device is also referred to as a host vehicle. That is, the main vehicle and other vehicles correspond to the host vehicle.
- the main in-vehicle communication device 10 of the present embodiment includes a wireless communication unit 11 that performs wireless communication with the outside of the main vehicle in which the main in-vehicle communication device 10 is mounted, and the speed of the main vehicle (main vehicle speed). ) Detecting the vehicle speed sensor unit 12, the operation input unit 13 for inputting the operation content by the user, the voice input unit 14 for inputting the uttered voice by the user, and the main control circuit 15 connected to these units 11 to 14. It has.
- the main control circuit 15 is connected to the audio device 30 and the navigation device 40 mounted on the main vehicle.
- the navigation device 40 displays map data around the current position of the main vehicle among the map data stored in a medium such as a hard disk, and superimposes the current position of the main vehicle and facility information (for example, the position of the facility) on the map data.
- the navigation control circuit 40b is configured around a known microcomputer.
- the CPU uses a RAM as a work area based on a program stored in the ROM, and performs general navigation processing and a main control circuit.
- the first and second main-navigation control processes based on the control command from 15 are executed.
- the general navigation process is to calculate an optimum route from the current position of the main vehicle based on a detection signal of a known GPS (Global Posting System) receiver or the like to a destination designated by the user, This is a process of performing route guidance or the like via 40a or the speaker 30a.
- GPS Global Posting System
- the first main-navigation control process is based on data (hereinafter referred to as “external data”) input from the outside of the navigation control circuit 40b in accordance with a first control command to be described later from the main control circuit 15. And an image such as a still image are displayed on the display 40a, and voices or the like of other users are output from the speaker 30a.
- the second main-navigation control process is based on the external data in accordance with a later-described second control command from the main control circuit 15, and the current position of the other vehicle is superimposed on the map data, Processing such as outputting a message or warning sound from the speaker 30a indicating the situation (the current position of the other vehicle, the current traveling speed, the current situation around the other vehicle (the presence of traffic jams, the state of the traffic light, etc.)) It is.
- the audio device 30 outputs audio of AM / FM broadcast received by the AM / FM radio tuner, audio of TV broadcast received by the TV tuner, music such as music read from a CD / DVD player, hard disk, or the like.
- the speaker 30 a, an audio control circuit 30 b that is connected to the main control circuit 15 and executes various processes, and a display 40 a that is shared with the navigation device 40 are configured.
- the audio control circuit 30b is configured around a known microcomputer.
- the CPU uses a RAM as a work area based on a program stored in the ROM, and performs general audio visual (AV) processing, Then, main-AV control processing based on a control command from the main control circuit 15 is executed.
- AV general audio visual
- general audiovisual processing means that audio such as AM / FM broadcast, TV broadcast, and music specified by the user is output from the speaker 30a, TV broadcast, DVD, video on a hard disk, still image, etc. For example, an image is displayed on the display 40a.
- the main-AV control process is to output audio such as AM / FM broadcast, TV broadcast, and music specified by the control command from the main control circuit 15 from the speaker 30a, TV broadcast, DVD, on the hard disk.
- This is a process of displaying an image such as a moving image or a still image on the display 40a.
- the voice input unit 14 performs a process of converting a voltage signal into voice data based on an input voltage from a microphone that collects sound around the sound, and inputs the voice data generated by this process to the main control circuit 15. is there.
- the operation input unit 13 detects a pressing operation (pressing operation with a finger, a pen, or the like) on the image display surface of the display 40a by the user, and detects a position on the image display surface where the pressing operation is performed.
- a pressing operation pressing operation with a finger, a pen, or the like
- These are configured by mechanical switches or the like, and input operation contents corresponding to a pressing operation by the user or the like to the main control circuit 15.
- shared information the thing for setting the sub vehicle-mounted communication apparatus 20 mounted in the other vehicle different from the main vehicle of the member (other users) at the time of carrying out this group traveling as a communication partner, And the like for setting information shared between users (hereinafter referred to as “shared information”).
- the wireless communication unit 11 performs medium-range wireless communication between the base station communication unit 11a connected to the base station in the communication area that covers the position of the main in-vehicle communication device 10 via the antenna and the outside of the main vehicle.
- This is a wireless LAN device configured to include a mid-range wireless communication unit 11b for performing.
- the base station communication unit 11a receives various contents designated by the user from the server, for example, by downloading and uploading various data to and from a server on the WEB via the Internet network connected to the base station. It is possible to do.
- the medium-range wireless communication unit 11b uses the existing wireless LAN technology as it is with respect to the communication method, encryption, etc., and uses the technology (WiFi Direct) that gives the wireless communication unit 11 (wireless LAN device) a function as an access point.
- Various signals such as wireless information signals can be transmitted to and received from one to a plurality of sub vehicle-mounted communication devices 20 located within a distance range of about several tens to several hundreds of meters.
- the main control circuit 15 is configured around a well-known microcomputer.
- the CPU executes various processes using the RAM as a work area based on programs and applications stored in the ROM. .
- the applications include those provided from a server on the WEB.
- voice voice data
- VoIP Voice over Internet Protocol
- the main control circuit 15 performs a reception intensity detection section 15a for detecting the intensity (reception intensity) of a signal received via the intermediate-range wireless communication unit 11b, and transmission control and reception control of various signals.
- the communication control section 15b to perform and the signal transmission section 15c which transmits various signals according to the command from the communication control section 15b are comprised. It can also be said that the communication control section 15b and the signal transmission section 15c function as a transmission control section.
- the signal transmission section 15c When there is no specific command from the communication control section 15b, the signal transmission section 15c generates transmission information indicating the command, voice data, character data, and the like based on the shared information set via the operation input unit 13. In addition, it is configured to transmit to the sub in-vehicle communication device 20 which is one or a plurality of communication partners set via the operation input unit 13 via the mid-range wireless communication unit 11b.
- voice data input from the voice input unit 14 by the call function video data input from the base station by the video playback function, mail function, chat Examples thereof include character data input from the operation input unit 13 according to functions and various data that can be acquired from the audio device 30.
- the wireless information signal may be the shared information itself or a command for acquiring the shared information.
- the same moving image data as the shared information is acquired (reproduced) by the moving image reproducing function of the sub in-vehicle communication device 20, or the same data (image) as the shared information from the audio device 30 included in the sub in-vehicle communication device 20. And audio).
- each section is expressed as S110, for example.
- each section can be divided into a plurality of subsections, while a plurality of sections can be combined into one section.
- each section configured in this manner can be referred to as a device, module, or means.
- each of the above sections or a combination thereof includes not only (i) a section of software combined with a hardware unit (eg, a computer), but also (ii) hardware (eg, an integrated circuit, As a section of (wiring logic circuit), it can be realized with or without the function of related devices.
- the hardware section can be configured inside the microcomputer.
- the communication control section 15b determines whether or not a radio signal is received from the sub in-vehicle communication device 20 via the intermediate-range wireless communication unit 11b in S110, and when an affirmative determination is made here The process proceeds to S120, and if a negative determination is made, the process proceeds to S130.
- S120 various processes (reception information processing) are performed according to the information included in the wireless signal received in S110, and the process proceeds to S130.
- the wireless information signal when a wireless information signal is received in S110 and the wireless information signal includes the above-described command, voice data, image data, character data, etc., the first information is used as external data.
- a first control command for causing the navigation control circuit 40b to execute main-navigation control processing is output.
- the wireless information signal includes vehicle status information (described later) indicating the current status of the vehicle on which the sub in-vehicle communication device 20 that is the transmission source is mounted, the vehicle status information is stored as external data.
- a second control command for causing the navigation control circuit 40b to execute the second main-navigation control process is output.
- the navigation control circuit 40b which has received the first control command from the communication control section 15b, executes the first main-navigation control process based on the external data, thereby displaying an image such as a moving image or a still image on the display 40a. For example, it is possible to display, or to output speech uttered by other users, sound, music, or sound linked to a moving image from the speaker 30a.
- the navigation control circuit 40b which has received the second control command from the communication control section 15b, executes the second main-navigation control process based on the external data, thereby superimposing and displaying the current position of the other vehicle on the map data. Or a message or warning sound from the speaker 30a indicating the current status of the other vehicle (current position of the other vehicle, current traveling speed, current status of the surrounding of the other vehicle (presence of traffic jam, traffic light status, etc.)) Will be output.
- the reception strength detected by the reception strength detection section 15a is lower than a preset first threshold strength. If an affirmative determination is made here, the process proceeds to S140. If a negative determination is made, the process proceeds to S150.
- the first threshold intensity is, for example, an intensity at which vehicle-to-vehicle communication can be performed, but is set in advance as an intensity at which the possibility that communication is interrupted increases below this intensity.
- vehicle status information indicating the current status of the main vehicle is acquired from the navigation control circuit 40b and the vehicle speed sensor unit 12, and this vehicle status information is output to the signal transmission section 15c.
- the signal transmission section 15c transmits a wireless information signal including vehicle status information via the medium distance wireless communication unit 11b.
- the vehicle status information includes, for example, position information indicating the current position of the main vehicle, speed information indicating the current traveling speed, road information (congestion information and traffic signal information) indicating the situation around the current vehicle, and the like. Can be mentioned. Incidentally, traffic jam information and traffic signal information can be acquired by road-to-vehicle communication performed with, for example, a roadside machine installed on the roadside.
- S150 the amount of change in the reception intensity detected by the reception intensity detection section 15a is measured. For example, by acquiring a sampling value indicating the reception intensity from the reception intensity detection section 15a and continuously storing the difference value between the current acquisition and the previous acquisition for the sampling value in the RAM, Monitor the amount of change. It can be said that S150 also functions as a reception change amount measurement section.
- the process proceeds to S170 and a negative determination is made. In the case, the process proceeds to S190.
- the reception threshold change amount is a threshold set in advance for detecting a sudden change in reception intensity.
- the first threshold intensity described above is variably set to a value larger than the initial value, while in S190, the first threshold intensity is reset to the initial value. That is, in S160 to S190, processing for variably setting the first threshold intensity is performed according to the reception intensity and the amount of change. It can be said that S160 to S190 function as a threshold intensity setting section. Specifically, in this embodiment, when the reception strength of a signal transmitted from another in-vehicle communication device is rapidly reduced, the wireless information including the vehicle status information is increased by increasing the first threshold strength. When the signal transmission timing is advanced and there is no such change in reception intensity, the first threshold intensity is reset to return to the timing based on the initial value.
- the process proceeds to S210 and a negative determination is made. If so, the process returns to S110.
- the second threshold strength is a value that is at least larger than the first threshold strength, so that the first threshold strength has a margin time in which vehicle-to-vehicle communication can be performed stably. Is set in advance.
- a radio detection signal transmission command prepared separately from the radio information signal described above is output to the signal transmission section 15c in order to increase the detection frequency of the reception intensity in the sub in-vehicle communication device 20 that is the communication partner.
- the signal transmission section 15c transmits a wireless detection signal via the medium distance wireless communication unit 11b according to the transmission command.
- a radio detection signal is also sent from the sub-vehicle communication apparatus 20 that is the communication partner.
- the process proceeds to S230 and a negative determination is made. In the case, the process proceeds to S240.
- the reception intensity detection frequency can be obtained from the number of times a sampling value indicating the reception intensity is acquired in a predetermined time.
- the threshold frequency is a value set in advance to maintain the accuracy of the threshold determination using the first threshold strength in S130 and the threshold determination using the second threshold strength in S200 in a good state. .
- a first radio control signal indicating that transmission of a radio detection signal from the sub-vehicle communication apparatus 20 that is a communication partner is unnecessary is transmitted, and the process returns to S110.
- wireless control signal implements transmission control which stops transmission of the radio
- the amount of change in the speed of the main vehicle is measured based on the detection result by the vehicle speed sensor unit 12. For example, by acquiring a sampling value indicating the main vehicle speed from the vehicle speed sensor unit 12, and continuously storing the difference value between the current acquisition amount and the previous acquisition amount for this sampling value in the RAM, the change in the main vehicle speed along the time series Monitor the amount. It can be said that S240 also functions as a speed change amount measurement section.
- the speed threshold change amount is a threshold set in advance for detecting a sudden change in the main vehicle speed.
- a second radio control signal indicating that it is necessary to reduce the transmission interval of the radio detection signal by the sub in-vehicle communication device 20 that is the communication partner is transmitted, and the process returns to S110.
- wireless control signal implements transmission control which shortens the transmission cycle of the radio
- the reception intensity of the signal transmitted from the sub in-vehicle communication device 20 is detected, and the reception intensity detected by the reception intensity detection section 15a is the first threshold intensity set in advance.
- the radio information signal including the vehicle status information indicating the current status of the main vehicle is transmitted only when the value is less than.
- each user can obtain the vehicle status information of the other vehicle only when the other vehicle is far away from the main vehicle even if the vehicle status information of the other vehicle is not transmitted when the other vehicle exists around the main vehicle. Is transmitted, it becomes possible to take action according to the current situation of the other vehicle at that time (for example, driving such that the other vehicle approaches the main vehicle).
- Wireless information signals can be transmitted and received for the purpose of sharing other information between users, such as information to be performed, and group traveling can be performed more comfortably.
- the amount of change in reception strength detected by the reception strength detection section 15a is measured, and the first threshold strength is variably set according to the amount of change in reception strength. Specifically, when the reception strength of the signal transmitted from the sub in-vehicle communication device 20 rapidly decreases, the timing at which the wireless information signal including the vehicle status information is transmitted by increasing the first threshold strength Can be made faster. Thereby, before communication with the sub vehicle-mounted communication apparatus 20 stops, the certainty which transmits the present condition of the main vehicle to the user of another vehicle can be raised.
- the sub in-vehicle communication device 20 receives the reception intensity.
- a wireless detection signal for increasing the frequency of detection is transmitted.
- the reception frequency of the wireless information signal decreases when the reception strength of the wireless information signal transmitted from the sub in-vehicle communication device 20 decreases, the decrease is the amount of the wireless detection signal. Since it is compensated by the increase in the reception frequency, the accuracy of the threshold determination using the first threshold intensity can be increased. Thereby, the precision of the timing which transmits a radio
- the transmission control process when the reception intensity detection frequency by the reception intensity detection section 15a is higher than a preset threshold frequency, it indicates that the transmission of the wireless detection signal from the sub in-vehicle communication device 20 is unnecessary. A first radio control signal is transmitted.
- the threshold determination using the first threshold intensity Therefore, it is possible to avoid unnecessary transmission / reception of a wireless detection signal, and thus to prevent the sharing of information between users.
- a second radio control signal indicating that it is necessary to reduce the transmission interval of the radio detection signal by the sub in-vehicle communication device 20 is transmitted.
- the reception intensity of the wireless information signal transmitted from the sub in-vehicle communication device 20 is reduced, the distance between the main vehicle and the other vehicle may be greatly separated if the speed of the main vehicle changes suddenly. Therefore, the accuracy of the threshold determination using the first threshold strength can be further increased by shortening the transmission interval of the wireless detection signal from the sub in-vehicle communication device 20. Thereby, even when the speed of the main vehicle is suddenly changed, it is possible to increase the certainty of transmitting the current state of the main vehicle to the user of the other vehicle before the communication with the sub in-vehicle communication device 20 is interrupted. .
- this indication is not limited to the above-mentioned embodiment, and can be carried out in various modes in the range which does not deviate from the gist of this indication.
- the first threshold intensity is increased, but the present invention is limited to this.
- the first threshold strength may be variably set according to the amount of change in the reception strength, such as decreasing the first threshold strength.
- the main vehicle-mounted communication apparatus 10 of the said embodiment although it is comprised so that a radio signal may be transmitted / received between the sub vehicle-mounted communication apparatuses 20 by WiFi direct, it is not limited to this, For example, WiFi direct Instead, the ad hoc mode of WiFi may be used, or other medium-range wireless communication technologies such as Bluetooth (TM) may be used.
- WiFi direct WiFi direct
- TM medium-range wireless communication technologies
- the sub vehicle-mounted communication apparatus 20 of the said embodiment was taken as the same structure as the main vehicle-mounted communication apparatus 10, it is not limited to this,
- the transmission control process it received from the main vehicle-mounted communication apparatus 10 You may be comprised so that various transmission control may be performed according to the command (The command for the main vehicle-mounted communication apparatus 10 to perform the same transmission control to the sub vehicle-mounted communication apparatus 20) contained in various signals.
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Abstract
In a transmission control process performed by a vehicle-mounted communication device in a primary vehicle, the reception strength of an incoming signal transmitted by a communication counterparty, namely another vehicle-mounted communication device, is detected. If and only if said reception strength falls below a preset first strength threshold ("YES" at S130), a wireless information signal containing vehicle-status information that indicates the current status of the primary vehicle is transmitted (S140) via a medium-range wireless communication unit. That is, the lower the reception strength of the incoming transmitted signal, the larger the distance between the primary vehicle and the other vehicle, and when said distance is large, the current status of the other vehicle can be conveyed to the driver of the primary vehicle.
Description
本開示は、2013年5月30日に出願された日本出願番号2013-114123号に基づくもので、ここにその記載内容を援用する。
This disclosure is based on Japanese Patent Application No. 2013-114123 filed on May 30, 2013, the contents of which are incorporated herein.
本開示は、ユーザ同士が情報を共有するための無線情報信号を送受信する車載通信装置に関する。
The present disclosure relates to an in-vehicle communication device that transmits and receives a wireless information signal for sharing information between users.
従来、複数のユーザがそれぞれ別の車両を運転して目的地に向かって走行するようなグループ走行を快適に行うことを目的として、例えば目的地に関する情報や趣味・嗜好が一致する情報等、各種の情報をユーザ同士が共有するための無線情報信号を送受信する車載通信装置が提案されている。
Conventionally, for the purpose of comfortably carrying out group traveling in which a plurality of users drive different vehicles and travel toward a destination, various information such as information on destinations and information that matches hobbies and preferences, etc. In-vehicle communication devices that transmit and receive wireless information signals for sharing information on each other have been proposed.
この種の車載通信装置がユーザ毎の各車両に搭載されることによって構成される車車間通信システムでは、通信トラフィックの渋滞を避けるために、全ての車載通信装置が移動体通信網の基地局を介してネットワークに接続するよりも、WiFiダイレクト等の中距離無線通信を利用して、無線情報信号を送受信する構成の方が望ましいと考えられる。
In a vehicle-to-vehicle communication system configured by mounting this type of in-vehicle communication device in each vehicle for each user, all in-vehicle communication devices are used as base stations for mobile communication networks in order to avoid congestion of communication traffic. It is considered that a configuration in which wireless information signals are transmitted and received using medium-distance wireless communication such as WiFi direct is more preferable than connecting to a network via a network.
一般的に、このような車車間通信システムでは、各車載通信装置が、車両の現在位置を示す位置情報を含む無線情報信号を送受信し、主車両の現在位置とともに他車両の現在位置を車載ディスプレイに表示するようになっており、さらには、位置情報に基づいて主車両と他車両とが合流する合流地点を算出し、主車両がこの合流地点に到達した時点で各車両の位置関係を表示するものも考えられている(例えば、特許文献1参照)。
Generally, in such a vehicle-to-vehicle communication system, each in-vehicle communication device transmits and receives a wireless information signal including position information indicating the current position of the vehicle, and displays the current position of the main vehicle along with the current position of the main vehicle. In addition, the merge point where the main vehicle and other vehicles meet is calculated based on the position information, and the positional relationship of each vehicle is displayed when the main vehicle reaches this merge point. The thing to do is also considered (for example, refer patent document 1).
しかしながら、従来の車車間通信システムでは、各車載通信装置が、合流地点を算出するために位置情報を含む無線情報信号を定期的に送受信しなければならない分、例えば目的地に関する情報や趣味・嗜好が一致する情報等、ユーザ同士が他の情報を共有する際に通信が途切れたり遅延したりする懸念があった。
However, in the conventional inter-vehicle communication system, each in-vehicle communication device must periodically transmit and receive a wireless information signal including position information in order to calculate a junction, for example, information on destinations and hobbies / preferences. There is a concern that communication may be interrupted or delayed when users share other information such as information that matches.
本開示は、上記懸念等に鑑みてなされたものであり、グループ走行をより快適に行うことを可能にする車載通信装置の提供を目的とする。
This disclosure has been made in view of the above-described concerns and the like, and an object thereof is to provide an in-vehicle communication device that enables group traveling more comfortably.
上記目的を達成するために、本開示の一つの例によれば、車載通信装置は、車両に搭載されて、少なくとも一つの、他の車両に搭載された他の車載通信装置との間で中距離無線通信を行うことにより、ユーザ同士が情報を共有するための無線情報信号を送受信し、受信強度検出セクションと、送信制御セクションとを備えるように提供される。
In order to achieve the above object, according to one example of the present disclosure, an in-vehicle communication device is mounted on a vehicle, and at least one other in-vehicle communication device mounted on another vehicle is in the middle. By performing the distance wireless communication, the wireless information signal for sharing information between users is transmitted and received, and a reception intensity detection section and a transmission control section are provided.
そして、本構造において、受信強度検出セクションは、他の車載通信装置から送信されてくる信号の受信強度を検出し、送信制御セクションは、受信強度検出セクションにより検出された受信強度が予め設定された第1の閾値強度を下回った場合に限り、車両の現在状況を示す車両状況情報を含む無線情報信号を送信することとした。
In this structure, the reception strength detection section detects the reception strength of signals transmitted from other in-vehicle communication devices, and the transmission control section is preset with the reception strength detected by the reception strength detection section. Only when the intensity falls below the first threshold intensity, the wireless information signal including the vehicle status information indicating the current status of the vehicle is transmitted.
つまり、本構成においては、他の車載通信装置から送信されてくる信号の受信強度が低くなるほど、主車両と他車両との距離が大きくなるため、この距離が大きくなった場合に、他車両の現在状況を主車両の運転者に伝えることができれば、ユーザ同士が各種情報を共有するための無線情報信号に位置情報等の車両状況情報を定期的に含めて送受信することは不要であることに着目した。
In other words, in this configuration, the lower the reception intensity of the signal transmitted from the other in-vehicle communication device, the greater the distance between the main vehicle and the other vehicle, so when this distance increases, If the current situation can be communicated to the driver of the main vehicle, it is not necessary for users to periodically send and receive vehicle status information such as position information in a wireless information signal for sharing various information. Pay attention.
なお、本構成の車載通信装置がユーザ毎の各車両に搭載されることによって構成される車車間通信システムは、各ユーザが同じ目的地に向かってお互いの位置を気にしながら走行する場合に多く用いられる。このため、各ユーザは、他車両が主車両の周囲に存在する場合に他車両の車両状況情報が伝達されなくても、他車両が主車両から遠く離れた場合に限り、他車両の車両状況情報が伝達されれば、そのときの他車両の現在状況に応じた行動(例えば、他車両が主車両に近づくような運転)をすることが可能になる。
The inter-vehicle communication system configured by mounting the in-vehicle communication device of this configuration on each vehicle for each user is often used when each user travels toward the same destination while paying attention to each other's position. Used. For this reason, each user can obtain the vehicle status of the other vehicle only when the other vehicle is far away from the main vehicle even if the vehicle status information of the other vehicle is not transmitted when the other vehicle exists around the main vehicle. If the information is transmitted, it is possible to perform an action (for example, driving such that the other vehicle approaches the main vehicle) according to the current situation of the other vehicle at that time.
したがって、本構成によれば、真に必要なときに限って車両状況情報を含めて無線情報信号を送受信する分、それ以外のときには、例えば目的地に関する情報や趣味・嗜好が一致する情報等、ユーザ同士が他の情報を共有することを目的として無線情報信号を送受信できるようになり、グループ走行をより快適に行うことが可能になる。
Therefore, according to this configuration, only when it is really necessary, it transmits and receives wireless information signals including vehicle status information, otherwise, for example, information on destinations, information that matches hobbies / preferences, etc. Wireless information signals can be transmitted and received between users for the purpose of sharing other information, and group traveling can be performed more comfortably.
本開示についての上記目的およびその他の目的、特徴や利点は、添付の図面を参照しながら下記の詳細な記述により、より明確になる。
車載通信装置の構成を例示するブロック図であり、
送信制御処理を例示するフローチャートである。
The above and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description with reference to the accompanying drawings.
It is a block diagram illustrating the configuration of an in-vehicle communication device, It is a flowchart which illustrates a transmission control process.
以下に、本開示の実施形態としての車載通信装置について図面と共に説明する。なお、本実施形態の車載通信装置は、例えば複数のユーザがそれぞれ別の車両を運転して目的地に向かって走行するようなグループ走行を行うことを目的として、各ユーザの車両に搭載される装置であり、例えば目的地に関する情報や趣味・嗜好が一致する情報等、各種の情報をユーザ同士が共有するために必要な無線情報信号を送受信するものである。
Hereinafter, an in-vehicle communication device as an embodiment of the present disclosure will be described with reference to the drawings. Note that the in-vehicle communication device of the present embodiment is mounted on each user's vehicle for the purpose of performing group traveling such that a plurality of users drive different vehicles and travel toward a destination, for example. A device that transmits and receives wireless information signals necessary for users to share various types of information such as information on destinations and information that matches hobbies and preferences.
また、以下の説明では、あるユーザの車両(以下、主車両という)に搭載される車載通信装置をメイン車載通信装置10とし、そのユーザが属するグループ内の別のユーザの車両(以下、他車両という)に搭載される他の車載通信装置をサブ車載通信装置20と称する。なお、本実施形態において、メイン車載通信装置10とサブ車載通信装置20とは同一構成(同一機能)であるものとする。また、車載通信装置を搭載する車両をホスト車両とも言及する。即ち、主車両および他車両ともホスト車両に相当する。
In the following description, an in-vehicle communication device mounted on a user's vehicle (hereinafter referred to as a main vehicle) is referred to as a main in-vehicle communication device 10, and another user's vehicle (hereinafter referred to as another vehicle) in a group to which the user belongs. The other in-vehicle communication device mounted in the above is referred to as a sub-in-vehicle communication device 20. In the present embodiment, it is assumed that the main in-vehicle communication device 10 and the sub in-vehicle communication device 20 have the same configuration (the same function). A vehicle equipped with an in-vehicle communication device is also referred to as a host vehicle. That is, the main vehicle and other vehicles correspond to the host vehicle.
<全体構成>
図1に示すように、本実施形態のメイン車載通信装置10は、当該メイン車載通信装置10が搭載された主車両の外部と無線通信を行う無線通信部11と、主車両の速度(主車速)を検出する車速センサ部12と、ユーザによる操作内容を入力する操作入力部13と、ユーザによる発話音声を入力する音声入力部14と、これら各部11~14に接続されたメイン制御回路15とを備えている。なお、メイン車載通信装置10において、メイン制御回路15は、主車両に搭載されたオーディオ装置30およびナビゲーション装置40に接続されている。 <Overall configuration>
As shown in FIG. 1, the main in-vehicle communication device 10 of the present embodiment includes a wireless communication unit 11 that performs wireless communication with the outside of the main vehicle in which the main in-vehicle communication device 10 is mounted, and the speed of the main vehicle (main vehicle speed). ) Detecting the vehicle speed sensor unit 12, the operation input unit 13 for inputting the operation content by the user, the voice input unit 14 for inputting the uttered voice by the user, and the main control circuit 15 connected to these units 11 to 14. It has. In the main in-vehicle communication device 10, the main control circuit 15 is connected to the audio device 30 and the navigation device 40 mounted on the main vehicle.
図1に示すように、本実施形態のメイン車載通信装置10は、当該メイン車載通信装置10が搭載された主車両の外部と無線通信を行う無線通信部11と、主車両の速度(主車速)を検出する車速センサ部12と、ユーザによる操作内容を入力する操作入力部13と、ユーザによる発話音声を入力する音声入力部14と、これら各部11~14に接続されたメイン制御回路15とを備えている。なお、メイン車載通信装置10において、メイン制御回路15は、主車両に搭載されたオーディオ装置30およびナビゲーション装置40に接続されている。 <Overall configuration>
As shown in FIG. 1, the main in-
ナビゲーション装置40は、ハードディスク等のメディアに格納された地図データのうち主車両の現在位置周辺の地図データを表示したり、主車両の現在位置や施設情報(例えば施設の位置)を地図データに重畳表示したりするためのディスプレイ40aと、メイン制御回路15に接続されて各種処理を実行するナビ制御回路40bと、オーディオ装置30と共用するスピーカ30aとを備えて構成される。
The navigation device 40 displays map data around the current position of the main vehicle among the map data stored in a medium such as a hard disk, and superimposes the current position of the main vehicle and facility information (for example, the position of the facility) on the map data. A display 40 a for displaying, a navigation control circuit 40 b connected to the main control circuit 15 for executing various processes, and a speaker 30 a shared with the audio device 30.
ナビ制御回路40bは、周知のマイクロコンピュータを中心に構成されており、例えばCPUが、ROMに記憶されているプログラムに基づいて、RAMを作業エリアとして用い、一般的なナビゲーション処理や、メイン制御回路15からの制御指令に基づく第1・第2メイン-ナビ制御処理等を実行する。
The navigation control circuit 40b is configured around a known microcomputer. For example, the CPU uses a RAM as a work area based on a program stored in the ROM, and performs general navigation processing and a main control circuit. The first and second main-navigation control processes based on the control command from 15 are executed.
なお、一般的なナビゲーション処理とは、周知のGPS(Global Posting System)受信機等の検出信号に基づく主車両の現在位置から、ユーザによって指定された目的地までの最適経路を計算するとともに、ディスプレイ40aやスピーカ30aを介してその経路案内等を行う処理である。
The general navigation process is to calculate an optimum route from the current position of the main vehicle based on a detection signal of a known GPS (Global Posting System) receiver or the like to a destination designated by the user, This is a process of performing route guidance or the like via 40a or the speaker 30a.
また、第1メイン-ナビ制御処理とは、メイン制御回路15からの後述する第1の制御指令に従って、ナビ制御回路40bの外部から入力されたデータ(以下「外部データ」という)に基づき、動画や静止画等の画像をディスプレイ40aに表示したり、他のユーザによる発話音声や楽曲、動画に連動した音声等をスピーカ30aから出力したりする等の処理である。
The first main-navigation control process is based on data (hereinafter referred to as “external data”) input from the outside of the navigation control circuit 40b in accordance with a first control command to be described later from the main control circuit 15. And an image such as a still image are displayed on the display 40a, and voices or the like of other users are output from the speaker 30a.
また、第2メイン-ナビ制御処理とは、メイン制御回路15からの後述する第2の制御指令に従って、外部データに基づき、他車両の現在位置を地図データに重畳表示したり、他車両の現在状況(他車両の現在位置や、現在の走行速度、現在の他車両の周囲における状況(渋滞有無や信号機の状態等))を示すメッセージや警告音等をスピーカ30aから出力したりする等の処理である。
Further, the second main-navigation control process is based on the external data in accordance with a later-described second control command from the main control circuit 15, and the current position of the other vehicle is superimposed on the map data, Processing such as outputting a message or warning sound from the speaker 30a indicating the situation (the current position of the other vehicle, the current traveling speed, the current situation around the other vehicle (the presence of traffic jams, the state of the traffic light, etc.)) It is.
オーディオ装置30は、AM/FM用ラジオチューナにより受信したAM/FM放送や、テレビチューナにより受信したTV放送の音声、CD/DVD再生機やハードディスク等から読み出された楽曲等の音声を出力するスピーカ30aと、メイン制御回路15に接続されて各種処理を実行するオーディオ制御回路30bと、ナビゲーション装置40と共用するディスプレイ40aとを備えて構成される。
The audio device 30 outputs audio of AM / FM broadcast received by the AM / FM radio tuner, audio of TV broadcast received by the TV tuner, music such as music read from a CD / DVD player, hard disk, or the like. The speaker 30 a, an audio control circuit 30 b that is connected to the main control circuit 15 and executes various processes, and a display 40 a that is shared with the navigation device 40 are configured.
オーディオ制御回路30bは、周知のマイクロコンピュータを中心に構成されており、例えばCPUが、ROMに記憶されているプログラムに基づいて、RAMを作業エリアとして用い、一般的なオーディオビジュアル(AV)処理や、メイン制御回路15からの制御指令に基づくメイン-AV制御処理等を実行する。
The audio control circuit 30b is configured around a known microcomputer. For example, the CPU uses a RAM as a work area based on a program stored in the ROM, and performs general audio visual (AV) processing, Then, main-AV control processing based on a control command from the main control circuit 15 is executed.
なお、一般的なオーディオビジュアル処理とは、ユーザによって指定されたAM/FM放送やTV放送、楽曲等の音声をスピーカ30aから出力したり、TV放送やDVD、ハードディスク上の動画や静止画等の画像をディスプレイ40aに表示したりする等の処理である。
Note that general audiovisual processing means that audio such as AM / FM broadcast, TV broadcast, and music specified by the user is output from the speaker 30a, TV broadcast, DVD, video on a hard disk, still image, etc. For example, an image is displayed on the display 40a.
また、メイン-AV制御処理とは、メイン制御回路15からの制御指令によって指定されたAM/FM放送やTV放送、楽曲等の音声をスピーカ30aから出力したり、TV放送やDVD、ハードディスク上の動画や静止画等の画像をディスプレイ40aに表示したりする等の処理である。
Also, the main-AV control process is to output audio such as AM / FM broadcast, TV broadcast, and music specified by the control command from the main control circuit 15 from the speaker 30a, TV broadcast, DVD, on the hard disk. This is a process of displaying an image such as a moving image or a still image on the display 40a.
音声入力部14は、周囲を集音するマイクからの入力電圧に基づいて、電圧信号を音声データに変換する処理を行い、この処理によって生成された音声データをメイン制御回路15に入力するものである。
The voice input unit 14 performs a process of converting a voltage signal into voice data based on an input voltage from a microphone that collects sound around the sound, and inputs the voice data generated by this process to the main control circuit 15. is there.
操作入力部13は、例えばユーザによるディスプレイ40aの画像表示面への押下操作(指やペン等による押下操作)を検出して、その押下操作がなされた画像表示面上の位置を検出するタッチパネルや、メカニカルなスイッチ等によって構成され、ユーザによる押下操作等に対応する操作内容をメイン制御回路15に入力するものである。
For example, the operation input unit 13 detects a pressing operation (pressing operation with a finger, a pen, or the like) on the image display surface of the display 40a by the user, and detects a position on the image display surface where the pressing operation is performed. These are configured by mechanical switches or the like, and input operation contents corresponding to a pressing operation by the user or the like to the main control circuit 15.
なお、ユーザによる操作内容としては、今回グループ走行を行う際のメンバー(他のユーザ)の主車両と異なる他車両に搭載されたサブ車載通信装置20を通信相手として設定するためのものや、今回のグループ走行においてユーザ同士が共有する情報(以下「共有情報」という)を設定するためのもの等も含まれる。
In addition, as operation content by a user, the thing for setting the sub vehicle-mounted communication apparatus 20 mounted in the other vehicle different from the main vehicle of the member (other users) at the time of carrying out this group traveling as a communication partner, And the like for setting information shared between users (hereinafter referred to as “shared information”).
無線通信部11は、アンテナを介してメイン車載通信装置10の位置をカバーする通信エリア内の基地局に接続される基地局通信部11aと、主車両の外部との間で中距離無線通信を行うための中距離無線通信部11bとを備えて構成される無線LAN機器である。
The wireless communication unit 11 performs medium-range wireless communication between the base station communication unit 11a connected to the base station in the communication area that covers the position of the main in-vehicle communication device 10 via the antenna and the outside of the main vehicle. This is a wireless LAN device configured to include a mid-range wireless communication unit 11b for performing.
基地局通信部11aは、基地局に接続されたインターネット網を介して、WEB上のサーバ等との間で各種データのダウンロード及びアップロードを行うことにより、例えばサーバからユーザの指定する各種コンテンツを受信することが可能になっている。
The base station communication unit 11a receives various contents designated by the user from the server, for example, by downloading and uploading various data to and from a server on the WEB via the Internet network connected to the base station. It is possible to do.
中距離無線通信部11bは、通信方式や暗号化等に関して既存の無線LANの技術をそのまま利用し、無線通信部11(無線LAN機器)にアクセスポイントとしての機能を持たせる技術(WiFiダイレクト)によって、数十~数百m程度の距離の範囲内に位置する1ないし複数のサブ車載通信装置20との間で無線情報信号等の各種信号を送受信することが可能になっている。
The medium-range wireless communication unit 11b uses the existing wireless LAN technology as it is with respect to the communication method, encryption, etc., and uses the technology (WiFi Direct) that gives the wireless communication unit 11 (wireless LAN device) a function as an access point. Various signals such as wireless information signals can be transmitted to and received from one to a plurality of sub vehicle-mounted communication devices 20 located within a distance range of about several tens to several hundreds of meters.
メイン制御回路15は、周知のマイクロコンピュータを中心に構成されており、例えばCPUが、ROMに記憶されているプログラムおよびアプリケーションに基づいて、RAMを作業エリアとして用い、各種処理を実行するものである。なお、アプリケーションには、WEB上のサーバから提供されるものも含まれ、例えば、VoIP(Voice over Internet Protocol)によって音声(音声データ)を符合化および圧縮し、パケットに変換したものをIPネットワークでリアルタイムに伝送する通話機能や、WEB上の動画サイトからストリーミングにより転送される動画を再生する動画再生機能、一般的なメール機能やチャット機能等を実現するためのものが含まれる。
The main control circuit 15 is configured around a well-known microcomputer. For example, the CPU executes various processes using the RAM as a work area based on programs and applications stored in the ROM. . The applications include those provided from a server on the WEB. For example, voice (voice data) is encoded and compressed by VoIP (Voice over Internet Protocol) and converted into packets on the IP network. This includes a call function for transmitting in real time, a moving image reproduction function for reproducing a moving image transferred from a moving image site on the WEB, a general mail function, a chat function, and the like.
また、機能的には、メイン制御回路15は、中距離無線通信部11bを介して受信した信号の強度(受信強度)を検出する受信強度検出セクション15aと、各種信号の送信制御および受信制御を行う通信制御セクション15bと、通信制御セクション15bからの指令に従って各種信号を送信する信号送信セクション15cとを備えて構成される。また、通信制御セクション15bと信号送信セクション15cとによって、送信制御セクションとして機能するともいえる。
Functionally, the main control circuit 15 performs a reception intensity detection section 15a for detecting the intensity (reception intensity) of a signal received via the intermediate-range wireless communication unit 11b, and transmission control and reception control of various signals. The communication control section 15b to perform and the signal transmission section 15c which transmits various signals according to the command from the communication control section 15b are comprised. It can also be said that the communication control section 15b and the signal transmission section 15c function as a transmission control section.
信号送信セクション15cは、通信制御セクション15bから特に指令がない場合、操作入力部13を介して設定された共有情報に基づいて、前記したコマンドや音声データ、文字データ等を示す送信情報を生成し、操作入力部13を介して設定された1ないし複数の通信相手であるサブ車載通信装置20に、中距離無線通信部11bを介して送信するように構成されている。
When there is no specific command from the communication control section 15b, the signal transmission section 15c generates transmission information indicating the command, voice data, character data, and the like based on the shared information set via the operation input unit 13. In addition, it is configured to transmit to the sub in-vehicle communication device 20 which is one or a plurality of communication partners set via the operation input unit 13 via the mid-range wireless communication unit 11b.
なお、共有情報としては、上記のアプリケーションによって実現される機能のうち、通話機能によって音声入力部14から入力される音声データや、動画再生機能によって基地局から入力される動画データ、メール機能やチャット機能によって操作入力部13から入力される文字データ、オーディオ装置30から取得し得る各種データ等が挙げられる。
As shared information, among the functions realized by the above applications, voice data input from the voice input unit 14 by the call function, video data input from the base station by the video playback function, mail function, chat Examples thereof include character data input from the operation input unit 13 according to functions and various data that can be acquired from the audio device 30.
また、無線情報信号は、共有情報そのものであってもよいし、共有情報を取得するためのコマンドであってもよい。後者のコマンドとしては、サブ車載通信装置20が有する動画再生機能によって共有情報と同じ動画データを取得(再生)させるものや、サブ車載通信装置20が有するオーディオ装置30から共有情報と同じデータ(画像や音声)を取得(再生)させるものがある。
In addition, the wireless information signal may be the shared information itself or a command for acquiring the shared information. As the latter command, the same moving image data as the shared information is acquired (reproduced) by the moving image reproducing function of the sub in-vehicle communication device 20, or the same data (image) as the shared information from the audio device 30 included in the sub in-vehicle communication device 20. And audio).
<通信制御処理>
ここで、通信制御セクション15bが実行する処理(通信制御処理)について、図2のフローチャートに沿って説明する。なお、本処理は、例えば、操作入力部13を介して1ないし複数の通信相手であるサブ車載通信装置20との間で、中距離無線通信部11bを介して行う車車間通信(中距離無線通信)が成立すると開始される。 <Communication control processing>
Here, the process (communication control process) executed by thecommunication control section 15b will be described with reference to the flowchart of FIG. Note that this processing is performed, for example, with vehicle-to-vehicle communication (medium-range wireless communication) performed via the mid-range wireless communication unit 11b with the sub-vehicle communication apparatus 20 that is one or more communication partners via the operation input unit 13. It starts when communication is established.
ここで、通信制御セクション15bが実行する処理(通信制御処理)について、図2のフローチャートに沿って説明する。なお、本処理は、例えば、操作入力部13を介して1ないし複数の通信相手であるサブ車載通信装置20との間で、中距離無線通信部11bを介して行う車車間通信(中距離無線通信)が成立すると開始される。 <Communication control processing>
Here, the process (communication control process) executed by the
ここで、この出願に記載されるフローチャート、あるいは、フローチャートの処理は、複数のセクション(あるいはステップと言及される)から構成され、各セクションは、たとえば、S110と表現される。さらに、各セクションは、複数のサブセクションに分割されることができる、一方、複数のセクションが合わさって一つのセクションにすることも可能である。さらに、このように構成される各セクションは、デバイス、モジュール、ミーンズとして言及されることができる。また、上記の複数のセクションの各々あるいは組合わさったものは、(i)ハードウエアユニット(例えば、コンピュータ)と組み合わさったソフトウエアのセクションのみならず、(ii)ハードウエア(例えば、集積回路、配線論理回路)のセクションとして、関連する装置の機能を含みあるいは含まずに実現できる。さらに、ハードウエアのセクションは、マイクロコンピュータの内部に構成されることもできる。
Here, the flowchart described in this application or the processing of the flowchart is configured by a plurality of sections (or referred to as steps), and each section is expressed as S110, for example. Furthermore, each section can be divided into a plurality of subsections, while a plurality of sections can be combined into one section. Further, each section configured in this manner can be referred to as a device, module, or means. In addition, each of the above sections or a combination thereof includes not only (i) a section of software combined with a hardware unit (eg, a computer), but also (ii) hardware (eg, an integrated circuit, As a section of (wiring logic circuit), it can be realized with or without the function of related devices. Furthermore, the hardware section can be configured inside the microcomputer.
本処理が開始されると、通信制御セクション15bは、S110において、サブ車載通信装置20から中距離無線通信部11bを介して無線信号を受信したか否かを判断し、ここで肯定判断した場合には、S120に移行し、否定判断した場合には、S130に移行する。
When this process is started, the communication control section 15b determines whether or not a radio signal is received from the sub in-vehicle communication device 20 via the intermediate-range wireless communication unit 11b in S110, and when an affirmative determination is made here The process proceeds to S120, and if a negative determination is made, the process proceeds to S130.
S120では、S110で受信した無線信号に含まれている情報に応じた各種処理(受信情報処理)を実施し、S130に移行する。
In S120, various processes (reception information processing) are performed according to the information included in the wireless signal received in S110, and the process proceeds to S130.
具体的には、S110で無線情報信号を受信し、その無線情報信号に前記したコマンドや音声データ、画像データ、文字データ等が含まれている場合には、これらの情報を外部データとして第1メイン-ナビ制御処理をナビ制御回路40bに実行させるための第1の制御指令を出力する。また、無線情報信号に、その送信元であるサブ車載通信装置20が搭載された車両の現在状況を示す車両状況情報(後述する)が含まれている場合には、その車両状況情報を外部データとして第2メイン-ナビ制御処理をナビ制御回路40bに実行させるための第2の制御指令を出力する。
Specifically, when a wireless information signal is received in S110 and the wireless information signal includes the above-described command, voice data, image data, character data, etc., the first information is used as external data. A first control command for causing the navigation control circuit 40b to execute main-navigation control processing is output. Further, when the wireless information signal includes vehicle status information (described later) indicating the current status of the vehicle on which the sub in-vehicle communication device 20 that is the transmission source is mounted, the vehicle status information is stored as external data. As a result, a second control command for causing the navigation control circuit 40b to execute the second main-navigation control process is output.
なお、通信制御セクション15bから第1の制御指令を入力したナビ制御回路40bは、外部データに基づいて第1メイン-ナビ制御処理を実行することにより、動画や静止画等の画像をディスプレイ40aに表示したり、他のユーザによる発話音声や楽曲、動画に連動した音声をスピーカ30aから出力したりすることになる。
The navigation control circuit 40b, which has received the first control command from the communication control section 15b, executes the first main-navigation control process based on the external data, thereby displaying an image such as a moving image or a still image on the display 40a. For example, it is possible to display, or to output speech uttered by other users, sound, music, or sound linked to a moving image from the speaker 30a.
また、通信制御セクション15bから第2の制御指令を入力したナビ制御回路40bは、外部データに基づいて第2メイン-ナビ制御処理を実行することにより、他車両の現在位置を地図データに重畳表示したり、他車両の現在状況(他車両の現在位置や、現在の走行速度、現在の他車両の周囲における状況(渋滞有無や信号機の状態等))を示すメッセージや警告音等をスピーカ30aから出力したりすることになる。
In addition, the navigation control circuit 40b, which has received the second control command from the communication control section 15b, executes the second main-navigation control process based on the external data, thereby superimposing and displaying the current position of the other vehicle on the map data. Or a message or warning sound from the speaker 30a indicating the current status of the other vehicle (current position of the other vehicle, current traveling speed, current status of the surrounding of the other vehicle (presence of traffic jam, traffic light status, etc.)) Will be output.
また、S110で第1の無線制御情報(後述する)を受信した場合には、後段のS210における無線検出信号(後述する)の送信を停止させ、S110で第2の無線制御情報(後述する)を受信した場合には、後段のS210における無線検出信号の送信周期を短くする送信制御を実施する。
When the first radio control information (described later) is received in S110, transmission of a radio detection signal (described later) in S210 at the subsequent stage is stopped, and second radio control information (described later) is performed in S110. Is received, transmission control for shortening the transmission cycle of the radio detection signal in S210 in the subsequent stage is performed.
次に、S130では、受信強度検出セクション15aにより検出された受信強度が予め設定された第1の閾値強度を下回るか否かを判断し、ここで肯定判断した場合には、S140に移行し、否定判断した場合には、S150に移行する。なお、第1の閾値強度とは、例えば、車車間通信を行うことが可能な強度ではあるが、この強度を下回ると通信が途絶える可能性が増していく強度として予め設定されたものである。
Next, in S130, it is determined whether or not the reception strength detected by the reception strength detection section 15a is lower than a preset first threshold strength. If an affirmative determination is made here, the process proceeds to S140. If a negative determination is made, the process proceeds to S150. Note that the first threshold intensity is, for example, an intensity at which vehicle-to-vehicle communication can be performed, but is set in advance as an intensity at which the possibility that communication is interrupted increases below this intensity.
そして、S140では、ナビ制御回路40bや車速センサ部12から主車両の現在状況を示す車両状況情報を取得し、この車両状況情報を信号送信セクション15cに出力する。なお、この情報を入力した場合、信号送信セクション15cは、車両状況情報を含む無線情報信号を、中距離無線通信部11bを介して送信することになる。
In S140, vehicle status information indicating the current status of the main vehicle is acquired from the navigation control circuit 40b and the vehicle speed sensor unit 12, and this vehicle status information is output to the signal transmission section 15c. When this information is input, the signal transmission section 15c transmits a wireless information signal including vehicle status information via the medium distance wireless communication unit 11b.
なお、車両状況情報としては、例えば、主車両の現在位置を示す位置情報や、現在の走行速度を示す速度情報、現在の車両の周囲における状況を示す道路情報(渋滞情報や信号機情報)等が挙げられる。ちなみに、渋滞情報や信号機情報は、例えば路側に設置された路側機等との間で行う路車間通信により取得することができる。
The vehicle status information includes, for example, position information indicating the current position of the main vehicle, speed information indicating the current traveling speed, road information (congestion information and traffic signal information) indicating the situation around the current vehicle, and the like. Can be mentioned. Incidentally, traffic jam information and traffic signal information can be acquired by road-to-vehicle communication performed with, for example, a roadside machine installed on the roadside.
一方、S150では、受信強度検出セクション15aにより検出された受信強度の変化量を計測する。例えば、受信強度検出セクション15aから受信強度を示すサンプリング値を取得し、このサンプリング値について今回取得分と前回取得分との差分値をRAMに記憶し続けることにより、時系列に沿った受信強度の変化量を監視する。S150は、受信変化量計測セクションとしても機能するといえる。
On the other hand, in S150, the amount of change in the reception intensity detected by the reception intensity detection section 15a is measured. For example, by acquiring a sampling value indicating the reception intensity from the reception intensity detection section 15a and continuously storing the difference value between the current acquisition and the previous acquisition for the sampling value in the RAM, Monitor the amount of change. It can be said that S150 also functions as a reception change amount measurement section.
続くS160では、S150による計測結果に基づいて、受信強度検出セクション15aにより検出された受信強度が低下したか否かを判断し、ここで肯定判断した場合には、S170に移行し、否定判断した場合には、S190に移行する。
In the subsequent S160, it is determined whether or not the reception strength detected by the reception strength detection section 15a has decreased based on the measurement result in S150. If an affirmative determination is made here, the process proceeds to S170 and a negative determination is made. In the case, the process proceeds to S190.
そして、S170では、S150によって計測された受信強度の変化量が予め設定された受信閾値変化量を上回るか否かを判断し、ここで肯定判断した場合には、S180に移行し、否定判断した場合には、S190に移行する。なお、受信閾値変化量とは、受信強度の急な変化を検出するために予め設定された閾値である。
In S170, it is determined whether or not the change amount of the reception intensity measured in S150 exceeds a preset reception threshold change amount. If an affirmative determination is made here, the process proceeds to S180 and a negative determination is made. In the case, the process proceeds to S190. The reception threshold change amount is a threshold set in advance for detecting a sudden change in reception intensity.
また、S180では、前述した第1の閾値強度を初期値よりも大きい値に可変設定し、一方、S190では、第1の閾値強度を初期値にリセットする。つまり、S160~S190では、受信強度およびその変化量に応じて、第1の閾値強度を可変設定する処理を行っている。S160~S190は、閾値強度設定セクションとして機能するともいえる。具体的には、本実施形態では、他の車載通信装置から送信されてくる信号の受信強度が急速に低下した場合、第1の閾値強度を大きくすることにより、車両状況情報を含めて無線情報信号を送信するタイミングを早くし、このような受信強度の変化がない場合には、第1の閾値強度をリセットすることにより、初期値に基づくタイミングに戻している。
In S180, the first threshold intensity described above is variably set to a value larger than the initial value, while in S190, the first threshold intensity is reset to the initial value. That is, in S160 to S190, processing for variably setting the first threshold intensity is performed according to the reception intensity and the amount of change. It can be said that S160 to S190 function as a threshold intensity setting section. Specifically, in this embodiment, when the reception strength of a signal transmitted from another in-vehicle communication device is rapidly reduced, the wireless information including the vehicle status information is increased by increasing the first threshold strength. When the signal transmission timing is advanced and there is no such change in reception intensity, the first threshold intensity is reset to return to the timing based on the initial value.
続くS200では、受信強度検出セクション15aにより検出された受信強度が予め設定された第2の閾値強度を下回るか否かを判断し、ここで肯定判断した場合には、S210に移行し、否定判断した場合には、S110に戻る。なお、第2の閾値強度は、少なくとも第1の閾値強度よりも大きい値であり、第1の閾値強度に対して、車車間通信を安定した状態で行うことが可能な余裕時間を持たせるために予め設定されている。
In subsequent S200, it is determined whether or not the reception intensity detected by the reception intensity detection section 15a is lower than a preset second threshold intensity. If an affirmative determination is made here, the process proceeds to S210 and a negative determination is made. If so, the process returns to S110. Note that the second threshold strength is a value that is at least larger than the first threshold strength, so that the first threshold strength has a margin time in which vehicle-to-vehicle communication can be performed stably. Is set in advance.
そして、S210では、通信相手であるサブ車載通信装置20において受信強度の検出頻度を増加させるために前述した無線情報信号とは別に用意された無線検出信号の送信指令を信号送信セクション15cに出力する。なお、この送信指令を入力した場合、信号送信セクション15cは、送信指令に従って無線検出信号を、中距離無線通信部11bを介して送信することになる。また、通信相手であるサブ車載通信装置20からも無線検出信号が送られてくることになる。
Then, in S210, a radio detection signal transmission command prepared separately from the radio information signal described above is output to the signal transmission section 15c in order to increase the detection frequency of the reception intensity in the sub in-vehicle communication device 20 that is the communication partner. . When this transmission command is input, the signal transmission section 15c transmits a wireless detection signal via the medium distance wireless communication unit 11b according to the transmission command. In addition, a radio detection signal is also sent from the sub-vehicle communication apparatus 20 that is the communication partner.
続くS220では、受信強度検出セクション15aによる受信強度の検出頻度が、予め設定された閾値頻度よりも高いか否かを判断し、ここで肯定判断した場合には、S230に移行し、否定判断した場合には、S240に移行する。なお、受信強度の検出頻度は、所定時間において受信強度を示すサンプリング値を取得した回数によって求めることができる。また、閾値頻度は、S130における第1の閾値強度を用いた閾値判定や、S200における第2の閾値強度を用いた閾値判定の精度を良好な状態に維持するために予め設定された値である。
In subsequent S220, it is determined whether or not the reception intensity detection frequency by the reception intensity detection section 15a is higher than a preset threshold frequency. If an affirmative determination is made here, the process proceeds to S230 and a negative determination is made. In the case, the process proceeds to S240. The reception intensity detection frequency can be obtained from the number of times a sampling value indicating the reception intensity is acquired in a predetermined time. The threshold frequency is a value set in advance to maintain the accuracy of the threshold determination using the first threshold strength in S130 and the threshold determination using the second threshold strength in S200 in a good state. .
そして、S230では、通信相手であるサブ車載通信装置20からの無線検出信号の送信が不要である旨を示す第1の無線制御信号を送信し、S110に戻る。なお、第1の無線制御信号を受信したサブ車載通信装置20は、前述した通り、S210における無線検出信号の送信を停止させる送信制御を実施する。
In S230, a first radio control signal indicating that transmission of a radio detection signal from the sub-vehicle communication apparatus 20 that is a communication partner is unnecessary is transmitted, and the process returns to S110. In addition, the sub vehicle-mounted communication apparatus 20 which received the 1st radio | wireless control signal implements transmission control which stops transmission of the radio | wireless detection signal in S210 as mentioned above.
一方、S240では、車速センサ部12による検出結果に基づいて、主車両の速度(主車速)の変化量を計測する。例えば、車速センサ部12から主車速を示すサンプリング値を取得し、このサンプリング値について今回取得分と前回取得分との差分値をRAMに記憶し続けることにより、時系列に沿った主車速の変化量を監視する。S240は、速度変化量計測セクションとしても機能するともいえる。
On the other hand, in S240, the amount of change in the speed of the main vehicle (main vehicle speed) is measured based on the detection result by the vehicle speed sensor unit 12. For example, by acquiring a sampling value indicating the main vehicle speed from the vehicle speed sensor unit 12, and continuously storing the difference value between the current acquisition amount and the previous acquisition amount for this sampling value in the RAM, the change in the main vehicle speed along the time series Monitor the amount. It can be said that S240 also functions as a speed change amount measurement section.
続くS250では、S240によって計測された主車速の変化量が予め設定された速度閾値変化量を上回るか否かを判断し、ここで肯定判断した場合には、S260に移行し、否定判断した場合には、S110に戻る。なお、速度閾値変化量とは、主車速の急な変化を検出するために予め設定された閾値である。
In subsequent S250, it is determined whether or not the change amount of the main vehicle speed measured in S240 exceeds a preset speed threshold change amount. If an affirmative determination is made here, the process proceeds to S260 and a negative determination is made. Return to S110. The speed threshold change amount is a threshold set in advance for detecting a sudden change in the main vehicle speed.
最後に、S260では、通信相手であるサブ車載通信装置20による無線検出信号の送信間隔の縮小が必要である旨を示す第2の無線制御信号を送信し、S110に戻る。なお、第2の無線制御信号を受信したサブ車載通信装置20は、前述した通り、S210における無線検出信号の送信周期を短くする送信制御を実施する。
Finally, in S260, a second radio control signal indicating that it is necessary to reduce the transmission interval of the radio detection signal by the sub in-vehicle communication device 20 that is the communication partner is transmitted, and the process returns to S110. In addition, the sub vehicle-mounted communication apparatus 20 which received the 2nd radio | wireless control signal implements transmission control which shortens the transmission cycle of the radio | wireless detection signal in S210 as mentioned above.
<効果>
以上説明したように、送信制御処理では、サブ車載通信装置20から送信されてくる信号の受信強度を検出し、受信強度検出セクション15aにより検出された受信強度が予め設定された第1の閾値強度を下回った場合に限り、主車両の現在状況を示す車両状況情報を含む無線情報信号を送信する。 <Effect>
As described above, in the transmission control process, the reception intensity of the signal transmitted from the sub in-vehicle communication device 20 is detected, and the reception intensity detected by the reception intensity detection section 15a is the first threshold intensity set in advance. The radio information signal including the vehicle status information indicating the current status of the main vehicle is transmitted only when the value is less than.
以上説明したように、送信制御処理では、サブ車載通信装置20から送信されてくる信号の受信強度を検出し、受信強度検出セクション15aにより検出された受信強度が予め設定された第1の閾値強度を下回った場合に限り、主車両の現在状況を示す車両状況情報を含む無線情報信号を送信する。 <Effect>
As described above, in the transmission control process, the reception intensity of the signal transmitted from the sub in-
つまり、サブ車載通信装置20から送信されてくる信号の受信強度が低くなるほど、主車両と他車両との距離が大きくなるため、この距離が大きくなった場合に、他車両の現在状況を主車両の運転者に伝えることができれば、ユーザ同士が各種情報を共有するための無線情報信号に位置情報等の車両状況情報を定期的に含めて送受信することは不要である。
That is, the lower the reception intensity of the signal transmitted from the sub in-vehicle communication device 20, the greater the distance between the main vehicle and the other vehicle. When this distance increases, the current state of the other vehicle is determined as the main vehicle. If it can be communicated to the driver, it is unnecessary to periodically transmit and receive vehicle status information such as position information in a wireless information signal for sharing various types of information between users.
よって、各ユーザは、他車両が主車両の周囲に存在する場合に他車両の車両状況情報が伝達されなくても、他車両が主車両から遠く離れた場合に限り、他車両の車両状況情報が伝達されれば、そのときの他車両の現在状況に応じた行動(例えば、他車両が主車両に近づくような運転)をすることが可能になる。
Therefore, each user can obtain the vehicle status information of the other vehicle only when the other vehicle is far away from the main vehicle even if the vehicle status information of the other vehicle is not transmitted when the other vehicle exists around the main vehicle. Is transmitted, it becomes possible to take action according to the current situation of the other vehicle at that time (for example, driving such that the other vehicle approaches the main vehicle).
したがって、車載通信装置10,20によれば、真に必要なときに限って車両状況情報を含めて無線情報信号を送受信する分、それ以外のときには、例えば目的地に関する情報や趣味・嗜好が一致する情報等、ユーザ同士が他の情報を共有することを目的として無線情報信号を送受信できるようになり、グループ走行をより快適に行うことが可能になる。
Therefore, according to the in- vehicle communication devices 10 and 20, only when it is really necessary, the wireless information signal including the vehicle status information is transmitted / received. Wireless information signals can be transmitted and received for the purpose of sharing other information between users, such as information to be performed, and group traveling can be performed more comfortably.
また、送信制御処理では、受信強度検出セクション15aにより検出された受信強度の変化量を計測し、この受信強度の変化量に応じて、第1の閾値強度を可変設定する。具体的には、サブ車載通信装置20から送信されてくる信号の受信強度が急速に低下した場合、第1の閾値強度を大きくすることにより、車両状況情報を含めて無線情報信号を送信するタイミングを早くすることができる。これにより、サブ車載通信装置20との通信が途絶える前に、他車両のユーザに主車両の現在状況を伝達する確実性を上げることができる。
Also, in the transmission control process, the amount of change in reception strength detected by the reception strength detection section 15a is measured, and the first threshold strength is variably set according to the amount of change in reception strength. Specifically, when the reception strength of the signal transmitted from the sub in-vehicle communication device 20 rapidly decreases, the timing at which the wireless information signal including the vehicle status information is transmitted by increasing the first threshold strength Can be made faster. Thereby, before communication with the sub vehicle-mounted communication apparatus 20 stops, the certainty which transmits the present condition of the main vehicle to the user of another vehicle can be raised.
また、送信制御処理では、受信強度検出セクション15aにより検出された受信強度が、第1閾値強度よりも大きい値として予め設定された第2の閾値強度を下回ると、サブ車載通信装置20において受信強度の検出頻度を増加させるための無線検出信号を送信する。
Further, in the transmission control process, when the reception intensity detected by the reception intensity detection section 15a falls below the second threshold intensity set in advance as a value larger than the first threshold intensity, the sub in-vehicle communication device 20 receives the reception intensity. A wireless detection signal for increasing the frequency of detection is transmitted.
このため、サブ車載通信装置20から送信されてくる無線情報信号の受信強度が低下したときに、その無線情報信号の受信頻度が減少した場合であっても、その減少分が、無線検出信号の受信頻度が増加することによって補われるため、第1の閾値強度を用いた閾値判定の精度を上げることができる。これにより、車両状況情報を含めて無線情報信号を送信するタイミングの精度も上げることができる。
For this reason, even when the reception frequency of the wireless information signal decreases when the reception strength of the wireless information signal transmitted from the sub in-vehicle communication device 20 decreases, the decrease is the amount of the wireless detection signal. Since it is compensated by the increase in the reception frequency, the accuracy of the threshold determination using the first threshold intensity can be increased. Thereby, the precision of the timing which transmits a radio | wireless information signal including vehicle condition information can also be raised.
また、送信制御処理では、受信強度検出セクション15aによる受信強度の検出頻度が、予め設定された閾値頻度よりも高い場合、サブ車載通信装置20からの無線検出信号の送信が不要である旨を示す第1の無線制御信号を送信する。
Further, in the transmission control process, when the reception intensity detection frequency by the reception intensity detection section 15a is higher than a preset threshold frequency, it indicates that the transmission of the wireless detection signal from the sub in-vehicle communication device 20 is unnecessary. A first radio control signal is transmitted.
これにより、サブ車載通信装置20から送信されてくる無線情報信号の受信強度が低下したときに、その無線情報信号の受信頻度が充分に高い場合には、第1の閾値強度を用いた閾値判定の精度がよい状態に維持されることから、不要な無線検出信号の送受信が行われずに済み、ひいてはユーザ同士による情報の共有を妨げずに済ませることができる。
Thereby, when the reception intensity of the radio information signal transmitted from the sub in-vehicle communication device 20 is lowered, and the reception frequency of the radio information signal is sufficiently high, the threshold determination using the first threshold intensity Therefore, it is possible to avoid unnecessary transmission / reception of a wireless detection signal, and thus to prevent the sharing of information between users.
また、送信制御処理では、主車両の速度の変化量を計測し、無線検出信号の受信中に、車両の速度の変化量が予め設定された速度閾値変化量を超えて速度が変化した場合、サブ車載通信装置20による無線検出信号の送信間隔の縮小が必要である旨を示す第2の無線制御信号を送信する。
Further, in the transmission control process, when the speed change amount of the main vehicle is measured and the speed change amount of the vehicle exceeds a preset speed threshold change amount during reception of the wireless detection signal, A second radio control signal indicating that it is necessary to reduce the transmission interval of the radio detection signal by the sub in-vehicle communication device 20 is transmitted.
これにより、サブ車載通信装置20から送信されてくる無線情報信号の受信強度が低下したときに、主車両の速度が急変化した場合、主車両と他車両との距離が大きく離れる可能性があることから、サブ車載通信装置20からの無線検出信号の送信間隔を短くしておくことにより、第1の閾値強度を用いた閾値判定の精度をさらに上げておくことができる。これにより、主車両の速度が急変化した場合であっても、サブ車載通信装置20との通信が途絶える前に、他車両のユーザに主車両の現在状況を伝達する確実性を上げることができる。
Thereby, when the reception intensity of the wireless information signal transmitted from the sub in-vehicle communication device 20 is reduced, the distance between the main vehicle and the other vehicle may be greatly separated if the speed of the main vehicle changes suddenly. Therefore, the accuracy of the threshold determination using the first threshold strength can be further increased by shortening the transmission interval of the wireless detection signal from the sub in-vehicle communication device 20. Thereby, even when the speed of the main vehicle is suddenly changed, it is possible to increase the certainty of transmitting the current state of the main vehicle to the user of the other vehicle before the communication with the sub in-vehicle communication device 20 is interrupted. .
<他の実施形態>
以上、本開示の実施形態について説明したが、本開示は上記実施形態に限定されるものではなく、本開示の要旨を逸脱しない範囲において、様々な態様にて実施することが可能である。 <Other embodiments>
As mentioned above, although embodiment of this indication was described, this indication is not limited to the above-mentioned embodiment, and can be carried out in various modes in the range which does not deviate from the gist of this indication.
以上、本開示の実施形態について説明したが、本開示は上記実施形態に限定されるものではなく、本開示の要旨を逸脱しない範囲において、様々な態様にて実施することが可能である。 <Other embodiments>
As mentioned above, although embodiment of this indication was described, this indication is not limited to the above-mentioned embodiment, and can be carried out in various modes in the range which does not deviate from the gist of this indication.
例えば、上記実施形態の送信制御処理では、サブ車載通信装置20から送信されてくる信号の受信強度が急速に低下した場合、第1の閾値強度を大きくしているが、これだけに限定されるものではなく、受信強度が急激に上昇した場合に、第1の閾値強度を小さくする等、受信強度の変化量に応じて、第1の閾値強度を可変設定してもよい。
For example, in the transmission control process of the above embodiment, when the reception intensity of the signal transmitted from the sub in-vehicle communication device 20 rapidly decreases, the first threshold intensity is increased, but the present invention is limited to this. Instead, when the reception strength suddenly increases, the first threshold strength may be variably set according to the amount of change in the reception strength, such as decreasing the first threshold strength.
また、上記実施形態のメイン車載通信装置10では、WiFiダイレクトによってサブ車載通信装置20との間で無線信号を送受信するように構成されているが、これに限定されるものではなく、例えばWiFiダイレクトではなく、WiFiのアドホックモードを利用してもよいし、Bluetooth(TM)等のその他の中距離無線通信技術を利用してもよい。
Moreover, in the main vehicle-mounted communication apparatus 10 of the said embodiment, although it is comprised so that a radio signal may be transmitted / received between the sub vehicle-mounted communication apparatuses 20 by WiFi direct, it is not limited to this, For example, WiFi direct Instead, the ad hoc mode of WiFi may be used, or other medium-range wireless communication technologies such as Bluetooth (TM) may be used.
なお、上記実施形態のサブ車載通信装置20は、メイン車載通信装置10と同一構成であるとしたが、これに限定されるものではなく、例えば送信制御処理において、メイン車載通信装置10から受信した各種信号に含まれているコマンド(メイン車載通信装置10がサブ車載通信装置20に同じ送信制御を実施させるためのコマンド)に従って、各種の送信制御を行うように構成されていてもよい。
In addition, although the sub vehicle-mounted communication apparatus 20 of the said embodiment was taken as the same structure as the main vehicle-mounted communication apparatus 10, it is not limited to this, For example, in the transmission control process, it received from the main vehicle-mounted communication apparatus 10 You may be comprised so that various transmission control may be performed according to the command (The command for the main vehicle-mounted communication apparatus 10 to perform the same transmission control to the sub vehicle-mounted communication apparatus 20) contained in various signals.
本開示は、実施例に準拠して記述されたが、本開示は当該実施例や構造に限定されるものではないと理解される。本開示は、様々な変形例や均等範囲内の変形をも包含する。加えて、様々な組み合わせや形態、さらには、それらに一要素のみ、それ以上、あるいはそれ以下、を含む他の組み合わせや形態をも、本開示の範疇や思想範囲に入るものである。
Although the present disclosure has been described based on the embodiments, it is understood that the present disclosure is not limited to the embodiments and structures. The present disclosure includes various modifications and modifications within the equivalent range. In addition, various combinations and forms, as well as other combinations and forms including only one element, more or less, are within the scope and spirit of the present disclosure.
Claims (5)
- 車両に搭載されて、少なくとも一つの、前記車両とは異なるところの他の車両に搭載され、予め設定された他の車載通信装置(20)との間で中距離無線通信を行うことにより、ユーザ同士が情報を共有するための無線情報信号を送受信する車載通信装置(10)であって、
前記他の車載通信装置から送信されてくる信号の受信強度を検出する受信強度検出セクション(15a)と、
前記受信強度検出セクションにより検出された受信強度が予め設定された第1の閾値強度を下回った場合に限り、前記車両の現在状況を示す車両状況情報を含む前記無線情報信号を送信する送信制御セクション(15b,15c)と、
を備える車載通信装置。 By performing medium-range wireless communication with another vehicle-mounted communication device (20) that is mounted on a vehicle and mounted on at least one other vehicle different from the vehicle and set in advance, the user can An in-vehicle communication device (10) for transmitting and receiving wireless information signals for sharing information with each other,
A reception intensity detection section (15a) for detecting the reception intensity of a signal transmitted from the other in-vehicle communication device;
A transmission control section that transmits the radio information signal including vehicle status information indicating the current status of the vehicle only when the received strength detected by the received strength detection section is lower than a preset first threshold strength. (15b, 15c),
An in-vehicle communication device. - 前記受信強度検出セクションにより検出された受信強度の変化量を計測する受信変化量計測セクション(S150)と、
前記受信変化量計測セクションにより計測された前記受信強度の変化量に応じて、前記第1の閾値強度を可変設定する閾値強度設定セクション(S160-S190)と、
を備える請求項1に記載の車載通信装置。 A reception change amount measurement section (S150) for measuring a change amount of the reception intensity detected by the reception intensity detection section;
A threshold strength setting section (S160-S190) for variably setting the first threshold strength according to the amount of change in the reception strength measured by the reception variation measurement section;
The in-vehicle communication device according to claim 1, comprising: - 前記送信制御セクションは、前記受信強度検出セクションにより検出された受信強度が、前記第1の閾値強度よりも大きい値として予め設定された第2の閾値強度を下回ると、前記他の車載通信装置において前記受信強度の検出頻度を増加させるための無線検出信号を送信する請求項1または請求項2に記載の車載通信装置。 When the reception strength detected by the reception strength detection section falls below a second threshold strength set in advance as a value larger than the first threshold strength, the other transmission control section The in-vehicle communication device according to claim 1 or 2, wherein a radio detection signal for increasing the detection frequency of the reception intensity is transmitted.
- 前記送信制御セクションは、前記受信強度検出セクションによる前記受信強度の検出頻度が、予め設定された閾値頻度よりも高い場合、前記他の車載通信装置からの前記無線検出信号の送信が不要である旨を示す第1の無線制御信号を送信する請求項3に記載の車載通信装置。 The transmission control section indicates that transmission of the wireless detection signal from the other in-vehicle communication device is unnecessary when the detection frequency of the reception intensity by the reception intensity detection section is higher than a preset threshold frequency. The in-vehicle communication device according to claim 3 which transmits the 1st radio control signal which shows.
- 前記車両の速度の変化量を計測する速度変化量計測セクション(S240)を備え、
前記送信制御セクションは、前記無線検出信号の受信中に、前記速度変化量計測セクションによる計測結果に基づき、前記車両の速度の変化量が予め設定された速度閾値変化量を超えて該速度が変化した場合、前記他の車載通信装置による該無線検出信号の送信間隔の縮小が必要である旨を示す第2の無線制御信号を送信する請求項3または請求項4に記載の車載通信装置。 A speed change amount measuring section (S240) for measuring a change in speed of the vehicle;
The transmission control section changes a speed change amount of the vehicle exceeding a preset speed threshold change amount based on a measurement result of the speed change amount measurement section while receiving the wireless detection signal. 5. The in-vehicle communication device according to claim 3, wherein the second in-vehicle communication device transmits a second radio control signal indicating that the transmission interval of the wireless detection signal needs to be reduced by the other in-vehicle communication device.
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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JP2007006395A (en) * | 2005-06-27 | 2007-01-11 | Toyota Infotechnology Center Co Ltd | Mobile terminal and transmission power control method |
JP2008236052A (en) * | 2007-03-16 | 2008-10-02 | Rohm Co Ltd | Position display device |
JP2011091795A (en) * | 2009-09-25 | 2011-05-06 | Sanyo Electric Co Ltd | Radio apparatus |
JP2013016142A (en) * | 2011-06-10 | 2013-01-24 | Sanyo Electric Co Ltd | Radio equipment |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004260753A (en) * | 2003-02-27 | 2004-09-16 | Matsushita Electric Ind Co Ltd | Transmission power control apparatus |
JP2007006395A (en) * | 2005-06-27 | 2007-01-11 | Toyota Infotechnology Center Co Ltd | Mobile terminal and transmission power control method |
JP2008236052A (en) * | 2007-03-16 | 2008-10-02 | Rohm Co Ltd | Position display device |
JP2011091795A (en) * | 2009-09-25 | 2011-05-06 | Sanyo Electric Co Ltd | Radio apparatus |
JP2013016142A (en) * | 2011-06-10 | 2013-01-24 | Sanyo Electric Co Ltd | Radio equipment |
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