JP2014085692A - Mobile-body position information provision device and mobile-body position information system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a processing load in an inter-vehicle and road-vehicle communication system and quickly evoke an attention to prevent collision between a vehicle itself and another vehicle.SOLUTION: A mobile-body position information provision device includes: an other-vehicle position information obtainment part for obtaining positional information on another vehicle; a vehicle itself-to-other vehicle distance calculation part for calculating a distance between the vehicle itself and other vehicle on the basis of positional information on the vehicle itself and the positional information on the other vehicle obtained by the other-vehicle position information obtainment part; and an other-vehicle position information output part for setting a frequency of outputting the positional information on the other vehicle obtained by the other-vehicle position information obtainment part at all times, with the frequency set lower as the distance between the vehicle itself and the other vehicle calculated by the vehicle itself-to-other vehicle distance calculation part increases, and outputting the positional information on the other vehicle.

Description

  The present invention relates to a technique for alerting a collision between a host vehicle and another vehicle.

  In the inter-vehicle / road-to-vehicle communication system, the positional information of each vehicle is exchanged to calculate the positional relationship between the own vehicle and the other vehicle, and the vehicle and the other vehicle are informed to the user on the vehicle. It is considered to give attention to the collision between the two.

  In patent document 1, since the information on the position of the other vehicle is preferentially notified to the own vehicle as the distance between the own vehicle and the other vehicle is shorter, the alert to the collision between the own vehicle and the other vehicle is not delayed. Done.

  In patent document 2, since the distribution cycle of the information on the position of the other vehicle is shorter in an emergency situation than in the normal situation, the information on the position of the other vehicle is delivered without delay in an emergency situation.

JP 2009-199222 A JP 2008-286713 A

  However, in Patent Document 1, only the order of notification of the position information of the other vehicle is determined according to the distance between the host vehicle and the other vehicle, that is, according to the priority, and the amount of communication data for the position information of the other vehicle is not reduced. The processing burden in the inter-vehicle / road-vehicle communication system is not reduced.

  And in patent document 2, in the normal situation, when the other vehicle suddenly approaches the own vehicle between the time when the information on the position of the other vehicle was distributed last time and the time when the latest vehicle was distributed, There is a possibility that alerts for collisions between the host vehicle and other vehicles will not occur without delay.

  Therefore, in order to solve the above-described problems, the present invention aims to reduce the processing burden in the inter-vehicle / road-to-vehicle communication system and to alert the collision between the own vehicle and other vehicles without delay. .

  In order to achieve the above object, the longer the distance between the host vehicle and the other vehicle, the lower the frequency of outputting the position information of the other vehicle, and the notification of the position information of the other vehicle.

  Specifically, the present invention includes an other vehicle position information acquisition unit that acquires information on the position of another vehicle, information on the position of the own vehicle, and information on the position of the other vehicle acquired by the other vehicle position information acquisition unit. And a distance between the own vehicle and the other vehicle calculated by the own vehicle / other vehicle distance calculation unit, and a distance between the own vehicle and the other vehicle calculated by the own vehicle / other vehicle distance calculation unit. The other vehicle position information output unit that outputs the position information of the other vehicle by setting the frequency of outputting the position information of the other vehicle acquired by the other vehicle position information acquisition unit as needed longer, It is a moving body position information provision apparatus characterized by comprising.

  According to this configuration, it is possible to reduce the processing load in the inter-vehicle / road-to-vehicle communication system and to alert the collision between the own vehicle and the other vehicle without delay.

  In the present invention, the other vehicle position information output unit stores the time when the other vehicle position information was last output, and the own vehicle other vehicle distance calculation unit calculates The longer the distance between the host vehicle and the other vehicle, the longer the time interval at which the other vehicle position information output unit outputs the position information of the other vehicle acquired by the other vehicle position information acquisition unit as needed. An output time interval setting unit for setting, wherein the other vehicle position information output unit stores information on the position of the other vehicle stored in the other vehicle position information output time storage unit. When the time interval has elapsed between the time when the vehicle was last output and the time when the other vehicle position information acquisition unit acquired the latest information on the position of the other vehicle, the other vehicle acquired most recently Position information output time storage unit From the time when the other vehicle position information output unit remembers the information of the position of the other vehicle last time until the other vehicle position information acquisition unit acquires the latest position information of the other vehicle, When the time interval has not elapsed, output of the position information of the other vehicle acquired most recently is stopped.

  According to this configuration, when there are a plurality of other vehicles, the information on the position of the other vehicle is notified at a separate timing for each of the plurality of other vehicles.

  Further, the present invention is a distance comparison determination unit that determines whether the distance between the host vehicle and the other vehicle calculated by the host vehicle other vehicle distance calculation unit is longer or shorter than a preset distance threshold; When the distance between the host vehicle and the other vehicle calculated by the host vehicle other vehicle distance calculation unit is longer than the distance threshold, between the host vehicle and the other vehicle calculated by the host vehicle other vehicle distance calculation unit. The other vehicle position information acquisition unit acquires the longer the distance between the own vehicle and the other vehicle distance storage unit that stores the distance between the host vehicle and the other vehicle distance storage unit, the longer the distance between the host vehicle and the other vehicle. An output time period setting unit configured to set a cycle of a timing at which the other vehicle position information output unit outputs the information on the position of the other vehicle, wherein the other vehicle position information output unit includes the other vehicle position information output unit. About the position information of the other vehicle acquired by the position information acquisition unit as needed When the distance between the host vehicle and the other vehicle calculated by the distance calculation unit is shorter than the distance threshold, the acquired information on the position of the other vehicle is output, and the other vehicle position information acquisition unit acquires from time to time. When the distance between the host vehicle and the other vehicle calculated by the host vehicle / other vehicle distance calculation unit is longer than the distance threshold, the acquired position information of the other vehicle is obtained. The moving body position information providing device that outputs the position information of the other vehicle acquired at the latest when the timing has elapsed when the timing has elapsed after the output is stopped, while stopping the output. It is.

  According to this configuration, when there are a plurality of other vehicles, the information on the positions of the other vehicles is thinned out at the same time for each of the plurality of other vehicles.

  Further, the present invention uses the mobile body position information providing device, the position information of the own vehicle, and the position information of the other vehicle output by the other vehicle position information output unit, and A mobile body position information system comprising: a mobile body position information processing apparatus that executes processing related to a positional relationship between other vehicles.

  According to this configuration, it is possible to reduce the processing load in the inter-vehicle / road-to-vehicle communication system and to alert the collision between the own vehicle and the other vehicle without delay.

  The present invention can reduce a processing load in a vehicle-to-vehicle / road-vehicle communication system, and can alert a collision between the host vehicle and another vehicle without delay.

It is a figure which shows the structure of the mobile body positional information system of this invention. It is a figure which shows the structure of the radio | wireless communication part of this invention. 3 is a flowchart illustrating received frame reception processing according to the first embodiment. 3 is a flowchart illustrating received frame reception processing according to the first embodiment. 6 is a flowchart illustrating received frame reception processing according to the second embodiment. 6 is a flowchart illustrating received frame reception processing according to the second embodiment. 10 is a flowchart illustrating notification timing processing according to the second embodiment.

  Embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments described below are examples of the present invention, and the present invention is not limited to the following embodiments.

(Outline of the present invention)
First, an outline of the present invention will be described. FIG. 1 shows the configuration of the mobile object position information system of the present invention. The moving body position information system S includes a wireless communication unit 1, an inter-vehicle / road-to-vehicle communication application unit 2, an own vehicle position information acquisition unit 3, an antenna 4, and a communication path 5.

  The wireless communication unit 1 obtains other vehicle position information from the antenna 4 in the form of a reception frame as a mobile body position information providing device, and sets the frequency of outputting the other vehicle position information as the distance between the other vehicle is longer. To do. Then, the wireless communication unit 1 transmits the other vehicle position information via the communication path 5 in the form of a notification frame having the same method as the received frame or in the form of a notification frame having a method different from the received frame due to frame method conversion. To the vehicle-to-vehicle / road-to-vehicle communication application unit 2. Here, the other vehicle position information is not information required by the wireless communication unit 1 belonging to the lower layer but information required by the vehicle-to-vehicle / road-vehicle communication application unit 2 belonging to the upper layer. Therefore, in order to recognize the other vehicle position information, the wireless communication unit 1 needs to recognize in advance the description position of the other vehicle position information in the received frame.

  The inter-vehicle / road-to-vehicle communication application unit 2 obtains the position information of the other vehicle from the wireless communication unit 1 via the communication path 5 in the form of a notification frame as the mobile body position information processing apparatus, and obtains the vehicle position information. , Using GPS (Global Positioning System), etc., from the own vehicle position information acquisition unit 3 that is not functionally included in the wireless communication unit 1, and using the own vehicle position information and other vehicle position information Processing related to the positional relationship between the vehicle and the other vehicle is executed. Specifically, the vehicle-to-vehicle / road-to-vehicle communication application unit 2 has a position display function for displaying the positions of the host vehicle and other vehicles to the user without delay, and alerts the user about the collision between the host vehicle and the other vehicles. It has a function to alert the user without delay. Here, the own vehicle position information acquisition unit 3 may not be functionally included in the wireless communication unit 1 and may be functionally included in the wireless communication unit 1. However, when the vehicle position information acquisition unit 3 is not functionally included in the wireless communication unit 1, the communication data amount of the vehicle position information in the communication path 5 can be reduced.

  The wireless communication unit 1 and the vehicle-to-vehicle / road-to-vehicle communication application unit 2 communicate via the communication path 5 regardless of whether they are in the same device or on the same board. Specifically, the communication via the communication path 5 is serial communication, communication via memory, USB communication, Ethernet (registered trademark) communication, or the like.

  In the present invention, whether to output other vehicle position information is determined not by the vehicle-to-vehicle / road-to-vehicle communication application unit 2 but by the wireless communication unit 1. Therefore, in the vehicle-to-vehicle / road-to-vehicle communication application unit 2, it is possible to reduce the processing load related to the other vehicle position information and to eliminate inconsistencies between the position display function and the alerting function. And in communication path 5, the amount of communication data of other vehicle position information can be reduced.

  The configuration of the wireless communication unit of the present invention is shown in FIG. The wireless communication unit 1 includes a communication determination processing unit 11, an other vehicle information storage unit 12, a parameter storage unit 13, and a host vehicle information storage unit 14.

  The communication determination processing unit 11 acquires information on the position of the host vehicle in the form of a host vehicle position information transmission request frame, and acquires information on the position of the other vehicle in the form of a received frame as the other vehicle position information acquisition unit. To do. Then, the communication determination processing unit 11 calculates the distance between the own vehicle and the other vehicle based on the information on the position of the own vehicle and the information on the position of the other vehicle as the own vehicle / other vehicle distance calculation unit. As the position information output unit, the longer the calculated distance between the own vehicle and the other vehicle, the lower the frequency of outputting the information on the position of the other vehicle acquired as needed, and the information on the position of the other vehicle is set in the notification frame. Output in the form of

  The other vehicle information storage unit 12 stores the time when the position information of the other vehicle was last output in association with the vehicle identifier of the other vehicle, or the distance between the own vehicle and the other vehicle is stored in the vehicle of the other vehicle. Store in association with the identifier. The parameter storage unit 13 stores the output frequency such that the longer the distance between the host vehicle and the other vehicle, the lower the frequency of outputting the information on the position of the other vehicle acquired as needed. The own vehicle information storage unit 14 stores the own vehicle position information acquired from the own vehicle position information transmission request frame. Details of the other vehicle information storage unit 12 and the parameter storage unit 13 will be described later in the first and second embodiments.

  As described above, the longer the distance between the host vehicle and the other vehicle, the lower the frequency with which the position information of the other vehicle is output, and the wireless communication unit 1 sets the information on the position of the other vehicle between the vehicle and the road. The inter-vehicle communication application unit 2 is notified. Therefore, the vehicle-to-vehicle / road-to-vehicle communication application unit 2 does not need to receive a lot of information on the position of the other vehicle, and does not need to thin out the information on the position of the other vehicle, thereby reducing the processing load. The inter-vehicle / road-to-vehicle communication application unit 2 has a high frequency of thinning out information on the position of the other vehicle having a long distance from the own vehicle, while the other vehicle having a short distance from the own vehicle. Since the frequency of notification of the position information of other vehicles is high, alerting to a collision between the own vehicle and the other vehicle can be performed without delay.

(Embodiment 1)
Next, the first embodiment will be described as a specific example in which the frequency of outputting the position information of the other vehicle is set lower as the distance between the host vehicle and the other vehicle is longer, and the position information of the other vehicle is notified. To do. 3 and 4 are flowcharts showing the reception frame reception process of the first embodiment.

  The other vehicle information storage unit 12 stores, as an other vehicle position information output time storage unit, the time when the communication determination processing unit 11 last outputs the position information of the other vehicle in the form of a notification frame. As the output time interval setting unit, the parameter storage unit 13 is the other vehicle acquired by the communication determination processing unit 11 in the form of a received frame as the distance between the host vehicle and the other vehicle calculated by the communication determination processing unit 11 increases. Is stored with a long time interval for the communication determination processing unit 11 to output in the form of a notification frame.

  The communication determination processing unit 11 starts from the time when the communication determination processing unit 11 stored in the other vehicle information storage unit 12 last outputs the position information of the other vehicle in the form of a notification frame. When the set time interval elapses until the position information is most recently acquired in the form of a received frame, the position information of the other vehicle acquired most recently is notified in the form of a notification frame.

  The communication determination processing unit 11 starts from the time when the communication determination processing unit 11 stored in the other vehicle information storage unit 12 last outputs the position information of the other vehicle in the form of a notification frame. If the set time interval has not elapsed before the latest position information is acquired in the form of a received frame, the latest acquired position information of the other vehicle is not notified.

  This will be specifically described with reference to FIGS. The communication determination processing unit 11 receives a reception frame from the antenna 4 (step S1). The communication determination processing unit 11 acquires the other vehicle position information and the vehicle identifier from the reception frame, and confirms the reception time (step S2).

  When the same vehicle identifier as the vehicle identifier in step S2 does not exist in the other vehicle information storage unit 12 (NO in step S3), the previous notification time information for the vehicle identifier does not exist in the other vehicle information storage unit 12. Therefore, the communication determination processing unit 11 cannot determine whether to notify other vehicle position information based on whether the notification time interval has elapsed between the previous notification time and the reception time.

  The communication determination processing unit 11 notifies other vehicle position information by a notification frame (step S4). When the remaining amount of memory in the other vehicle information storage unit 12 is sufficient (YES in step S5), the communication determination processing unit 11 stores the current notification time information for the vehicle identifier (step S6). When the remaining memory capacity of storage unit 12 is not sufficient (NO in step S5), the current notification time information is not stored for the vehicle identifier.

  When the same vehicle identifier as the vehicle identifier in step S2 exists in the other vehicle information storage unit 12 (YES in step S3), the previous notification time information for the vehicle identifier exists in the other vehicle information storage unit 12. Therefore, the communication determination processing unit 11 can determine whether to notify the other vehicle position information based on whether the notification time interval has elapsed between the previous notification time and the reception time.

  The communication determination processing unit 11 acquires the previous notification time information for the vehicle identifier from the other vehicle information storage unit 12 (step S7). The communication determination processing unit 11 calculates the distance between the host vehicle and the other vehicle based on the host vehicle position information and the other vehicle position information (step S8).

The communication determination processing unit 11 sets the notification time interval to be longer as the distance between the host vehicle and the other vehicle is longer (step S9). Specifically, the communication determination processing unit 11 sets the notification time interval W ₁ set for the own-other vehicle distance D ₁ and the notification time set for the own-other vehicle distance D ₂ (> D ₁ ). The interval W ₂ (> W ₁ ) is acquired from the parameter storage unit 13. Notification time interval W _1, the communication judgment unit 11 information on the position of another vehicle obtained at any time, as the communication judgment unit 11 outputs all be stored and set. When the notification time interval W ₂ is infinite, oneself and others following distance information of the position of the other vehicle is a D ₂ will stop all output.

  If the notification time interval has not elapsed between the previous notification time and the reception time (NO in step S10), the communication determination processing unit 11 does not notify the other vehicle position information (step S11). When the notification time interval has elapsed between the previous notification time and the reception time (YES in step S10), the communication determination processing unit 11 notifies other vehicle position information by a communication frame (step S12). For the vehicle identifier, the previous notification time information is updated to the current notification time information (step S13). The processes shown in FIGS. 3 and 4 are repeatedly executed every time reception frames are received from the same other vehicle at a predetermined interval.

  In the first embodiment, when there are a plurality of other vehicles, the information on the position of the other vehicle is thinned out at different timings for each of the plurality of other vehicles.

(Embodiment 2)
Next, the second embodiment will be described as a specific example in which the frequency of outputting the position information of the other vehicle is set lower as the distance between the host vehicle and the other vehicle is longer, and the position information of the other vehicle is notified. To do. 5 and 6 are flowcharts showing the reception frame reception process of the second embodiment, and FIG. 7 is a flowchart showing the notification timing process of the second embodiment.

  The communication determination processing unit 11 as a distance comparison determination unit determines whether the distance between the host vehicle and the other vehicle calculated by the communication determination processing unit 11 is longer or shorter than a preset distance threshold. The other vehicle information storage unit 12 serves as the own vehicle other vehicle distance storage unit, and when the distance between the own vehicle and the other vehicle calculated by the communication determination processing unit 11 is longer than a preset distance threshold, the communication determination processing unit 11 Stores the distance between the host vehicle and the other vehicle and the received frame calculated by.

  The parameter storage unit 13 stores a preset distance threshold, and as the output time period setting unit, the longer the distance between the host vehicle and the other vehicle stored in the other vehicle information storage unit 12 is, the longer the communication determination processing unit is 11 stores information on the position of the other vehicle acquired as needed in the form of a received frame by setting a longer period of timing for the communication determination processing unit 11 to output in the form of a notification frame.

  The communication determination processing unit 11 is preset with a distance between the own vehicle and the other vehicle calculated by the communication determination processing unit 11 for information on the position of the other vehicle acquired by the communication determination processing unit 11 in the form of a received frame as needed. When the distance is shorter than the distance threshold, the acquired information on the position of the other vehicle is notified in the form of a notification frame.

  The communication determination processing unit 11 is preset with a distance between the own vehicle and the other vehicle calculated by the communication determination processing unit 11 for information on the position of the other vehicle acquired by the communication determination processing unit 11 in the form of a received frame as needed. When the distance is longer than the distance threshold, the acquired information on the position of the other vehicle is not notified. And when the said timing passes after notification cancellation, the communication determination processing part 11 notifies the information of the position of the other vehicle acquired at the time when the said timing passed in the form of a notification frame.

  This will be specifically described with reference to FIGS. The reception frame reception process shown in FIGS. 5 and 6 and the notification timing process shown in FIG. 7 are executed in parallel.

  The communication determination processing unit 11 receives the received frame from the antenna 4 (step S21). The communication determination processing unit 11 acquires the other vehicle position information and the vehicle identifier from the received frame (step S22). The communication determination processing unit 11 calculates the distance between the host vehicle and the other vehicle based on the host vehicle position information and the other vehicle position information (step S23). The communication determination processing unit 11 acquires a distance threshold value from the parameter storage unit 13 (step S24).

  When the distance between the host vehicle and the other vehicle is shorter than the distance threshold (NO in step S25), the communication determination processing unit 11 notifies other vehicle position information by a notification frame (step S26).

  The own-other-vehicle distance information stored in the other-vehicle information storage unit 12 is information necessary for determining the notification timing when the own-other-vehicle distance is longer than the distance threshold. When it is short, it is unnecessary information. When the same vehicle identifier as the vehicle identifier in step S22 is present in the other vehicle information storage unit 12 (YES in step S27), the communication determination processing unit 11 deletes the own-to-other vehicle distance information and the received frame for the vehicle identifier. However (step S28), when the same vehicle identifier as the vehicle identifier of step S22 does not exist in the other vehicle information storage unit 12 (NO in step S27), it is left as it is.

  When the distance between the host vehicle and the other vehicle is longer than the distance threshold (YES in step S25), the communication determination processing unit 11 does not notify other vehicle position information in principle (steps S31 and S34).

  When the same vehicle identifier as the vehicle identifier in step S22 does not exist in the other vehicle information storage unit 12 (NO in step S29), the own-other vehicle distance information for the vehicle identifier does not exist in the other vehicle information storage unit 12. Therefore, the communication determination processing unit 11 stores the own-to-other vehicle distance information in the other vehicle information storage unit 12.

  When the remaining amount of memory in the other vehicle information storage unit 12 is sufficient (YES in step S30), the communication determination processing unit 11 does not notify the other vehicle position information in principle (step S31), and determines whether or not the vehicle identifier is The inter-vehicle distance information and the received frame are stored (step S32). When the remaining amount of memory in the other vehicle information storage unit 12 is not sufficient (NO in step S30), the communication determination processing unit 11 does not store the own inter-other vehicle distance information and the received frame for the vehicle identifier, and stores the other vehicle position information. An exception is notified by a notification frame (step S33).

  When the same vehicle identifier as the vehicle identifier in step S22 exists in the other vehicle information storage unit 12 (YES in step S29), the own-other vehicle distance information for the vehicle identifier exists in the other vehicle information storage unit 12. Therefore, the communication determination processing unit 11 updates the own-to-other vehicle distance information in the other vehicle information storage unit 12.

  The communication determination processing unit 11 does not notify other vehicle position information in principle (step S34). When the current own-other vehicle distance is longer than the previous own-other vehicle distance (YES in step S35), the communication determination processing unit 11 maintains the previous own-other vehicle distance information for the vehicle identifier and receives the previous reception. The frame is updated to the current reception frame (step S36), and when the current own-other vehicle distance is shorter than the previous own-other vehicle distance (NO in step S35), the previous own-other vehicle distance information and The received frame is updated to the current inter-vehicle distance information and the received frame (step S37).

  That is, since the communication determination processing unit 11 alerts a collision between the own vehicle and another vehicle closer to the own vehicle without delay, the communication determination processing unit 11 is based on the shorter own-other vehicle distance among the current and previous inter-vehicle distances. , Determine the timing of notification. The processes shown in FIGS. 5 and 6 are repeatedly executed every time reception frames are received from the same other vehicle at a predetermined interval.

The communication determination processing unit 11 sets the notification timing cycle to be longer as the distance between the host vehicle and the other vehicle is longer (step S41). Specifically, the communication determination processing unit 11 performs the notification timing cycle W ₃ set for the own-other vehicle distance D ₃ <D <D ₄ or the own-other vehicle distance D ₄ <D <D ₅ . The set notification timing cycle W ₄ (> W ₃ ) is acquired from the parameter storage unit 13. Notification time interval W ₃ being identical to be longer than a predetermined interval for receiving the received frame from the other vehicle, can be stored and set. Self-other vehicle distance D ₃ is to be equal to the distance threshold value in step S24, it can be stored and set. When the notification time interval W ₄ is infinite, oneself and others following distance to stop all the information of the position of the other vehicle output is D _{4 <D <D 5.}

In the following, the notification timing process based on the notification timing period W ₃ set for the own-to-other vehicle distance D ₃ <D <D ₄ will be described, but the own-to-other-vehicle distance D ₄ <D <D _{5 is} set. the same applies to the notification timing process based on the notification timing cycle W ₄ which is.

When the notification timing set for the own-to-other vehicle distance D ₃ <D <D ₄ has not elapsed (NO in step S42), the communication determination processing unit 11 displays the latest vehicle position information acquired at the current time. Without notifying, the own vehicle-to-other vehicle distance information and the received frame are stored as they are (step S43).

When the notification timing set for own-to-other vehicle distance D ₃ <D <D ₄ has elapsed (YES in step S42), communication determination processing unit 11 determines all vehicle identifiers in other vehicle information storage unit 12. The following processing is executed (steps S44 to S48).

The communication determination processing unit 11 acquires the own-to-other vehicle distance information from the other vehicle information storage unit 12 (step S44). When the acquired own-other vehicle distance is within the range of the own-other vehicle distance D ₃ <D <D ₄ (YES in step S45), the communication determination processing unit 11 acquires the latest vehicle position acquired when the notification timing has elapsed. Information is notified by a notification frame (step S46), and the own-other vehicle distance information and the received frame are deleted (step S47). When the acquired own-other vehicle distance is not within the range of the own-other vehicle distance D ₃ <D <D ₄ (NO in step S45), the communication determination processing unit 11 acquires the latest other vehicle position information when the notification timing has elapsed. Is not stored, and the own-other-vehicle distance information and the received frame are stored as they are (step S48). The process shown in FIG. 7 is repeatedly executed every time the notification timing elapses.

  In the second embodiment, when there are a plurality of other vehicles, the information on the position of the other vehicle is thinned out at the same time for each of the plurality of other vehicles.

(Modification)
In Embodiments 1 and 2, when the moving speed of the host vehicle and / or the other vehicle is fast, the distance between the host vehicle and the other vehicle is opened at a certain timing, but the distance between the host vehicle and the other vehicle can be shortened at a timing immediately after. In this case, the other vehicle position information does not have to be notified at the certain timing, but an adverse effect of non-notification of the other vehicle position information at the certain timing comes out at the immediately following timing.

  Therefore, as a modification of the first embodiment, the notification time interval may be set shorter as the moving speed of the own vehicle and / or the other vehicle is higher. As a modification of the second embodiment, the notification timing cycle may be set shorter as the moving speed of the own vehicle and / or the other vehicle is higher.

  The mobile body location information providing apparatus and the mobile body location information system according to the present invention have a wireless communication function, a warning function, and a position display function in an integrated manner in order to reduce costs, save space, and improve performance through a synergistic effect. The present invention can be applied to a navigation device.

S: mobile body position information system 1: wireless communication unit 2: vehicle-to-vehicle / road-to-vehicle communication application unit 3: own vehicle position information acquisition unit 4: antenna 5: communication path 11: communication determination processing unit 12: other vehicle information storage unit 13: Parameter storage unit 14: Own vehicle information storage unit

Claims (4)

Another vehicle position information acquisition unit for acquiring information of the position of the other vehicle;
A host vehicle other vehicle distance calculating unit that calculates a distance between the host vehicle and the other vehicle based on information on the position of the host vehicle and information on the position of the other vehicle acquired by the other vehicle position information acquiring unit; ,
The longer the distance between the host vehicle and the other vehicle calculated by the host vehicle / other vehicle distance calculation unit, the lower the frequency of outputting the position information of the other vehicle acquired by the other vehicle position information acquisition unit as needed. Other vehicle position information output unit configured to output information of the position of the other vehicle;
A moving body position information providing apparatus comprising: Other vehicle position information output time storage unit for storing the time when the other vehicle position information output unit last output the position information of the other vehicle;
As the distance between the host vehicle and the other vehicle calculated by the host vehicle other vehicle distance calculation unit is longer, the information on the position of the other vehicle acquired by the other vehicle position information acquisition unit is obtained as needed. An output time interval setting unit for setting a long time interval to be output by the information output unit;
Further comprising
The other vehicle position information output unit
From the time when the other vehicle position information output unit stored in the other vehicle position information output time storage unit last outputs the position information of the other vehicle, the other vehicle position information acquisition unit stores information on the position of the other vehicle. When the time interval elapses until the latest is acquired, the latest position information of the other vehicle acquired is output,
From the time when the other vehicle position information output unit stored in the other vehicle position information output time storage unit last outputs the position information of the other vehicle, the other vehicle position information acquisition unit stores information on the position of the other vehicle. 2. The moving body according to claim 1, wherein when the time interval has not elapsed before the latest acquisition of the vehicle, the output of the latest information on the position of the other vehicle is stopped. Location information providing device. A distance comparison determination unit that determines whether the distance between the host vehicle and the other vehicle calculated by the host vehicle other vehicle distance calculation unit is longer or shorter than a preset distance threshold;
When the distance between the host vehicle and the other vehicle calculated by the host vehicle other vehicle distance calculation unit is longer than the distance threshold, between the host vehicle and the other vehicle calculated by the host vehicle other vehicle distance calculation unit. The other vehicle distance storage unit for storing the distance of the vehicle,
As the distance between the host vehicle and the other vehicle stored in the host vehicle other vehicle distance storage unit is longer, the information on the position of the other vehicle acquired by the other vehicle position information acquisition unit as needed is obtained. An output time period setting unit for setting a longer period of timing output by the information output unit;
Further comprising
The other vehicle position information output unit
When the distance between the host vehicle and the other vehicle calculated by the host vehicle other vehicle distance calculation unit is shorter than the distance threshold for the information on the position of the other vehicle acquired by the other vehicle position information acquisition unit as needed, Output the information of the obtained position of the other vehicle,
When the distance between the host vehicle and the other vehicle calculated by the host vehicle other vehicle distance calculation unit is longer than the distance threshold for the information on the position of the other vehicle acquired by the other vehicle position information acquisition unit as needed, Output of the acquired position information of the other vehicle is stopped, and when the timing elapses after the output is stopped, the latest acquired position information of the other vehicle at the time when the timing elapses is output. The mobile body position information providing apparatus according to claim 1. The mobile body position information providing device according to any one of claims 1 to 3,
Movement for executing processing related to the positional relationship between the host vehicle and the other vehicle using the position information of the host vehicle and the position information of the other vehicle output by the other vehicle position information output unit A body position information processing device;
A moving body position information system comprising:

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