JP2005004505A - Danger advance warning mobile object device, danger advance warning center device and danger advance warning transmitting/receiving system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a device and a system for quickly providing or obtaining warning information by collecting individual positional information based on high detection accuracy and feeding back the collected information to each individual user being an object. <P>SOLUTION: A mobile object device 300 for obtaining the information of other mobile objects by communicating with a center is provided with a position measuring part 313 for specifying an area by positional information, a reserve transmission part 333 for securing a communication slot for communication with the center, an own-vehicle information generation part 334 for generating identification information including the positional information of its own vehicle which is to be transmitted to the center through the reserved communication slot, an information selection part 323 for selecting necessary information from information received from the center on the basis of the identification information, and an information analysis part 330 for analyzing the selected information and outputting danger warning classified on the basis of a previously determined threshold. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus, a system, and the like for receiving warning information corresponding to individual information using a quasi-zenith satellite or the like in a broadcast signal format and using it for danger avoidance or the like.
[0002]
[Prior art]
The use of information communication services using position information is progressing, such as car navigation and mobile phones using GPS. In car navigation systems and mobile phones using GSP, the location of one's own car is displayed on a map or the like according to the position of one's own car or one's own position, and is used for route guidance to a destination. Recently, a service for obtaining information on the location of a car or information about a store around the location of the user by accessing the center (base station) with a mobile phone or the like has begun.
[0003]
The abstract of Patent Document 1 discloses the following technique for the purpose of searching for a route to a destination and accurately measuring and displaying the required time. "Integration of information for each area that receives information from in-vehicle means for route search and measurement of required time to destination with received information from satellite and information from in-vehicle means via roadside means and newly generates road management basic information And satellite uplink means for outputting road management basic information transmitted from a plurality of area-by-area information integration means to the satellite in a predetermined order ”(Japanese Patent Laid-Open No. 2002-298293, summary) ).
[0004]
As an automobile collision prevention support system, an alarm system using a millimeter wave radar mounted on a car or the like has been put into practical use. That is, a millimeter wave laser is irradiated from one's own vehicle, and a distance is measured by receiving a reflected wave. This is a system that issues an alarm when the distance is considered dangerous from the relative speed. But this is mainly for auto cruise.
More recently, broadcasting warning experiments have been conducted to prevent encounter collisions by AHS (driving support road system) using DSRC (narrow area communication).
[0005]
[Patent Document 1]
JP-A-2002-298293 [0006]
[Problems to be solved by the invention]
However, the conventional system or apparatus is limited to providing and accessing information on traffic jams, road information on the shortest route, peripheral equipment, and the like. In other words, there is no progress in obtaining appropriate information about the surroundings when driving a car, and it is still specific about the provision and use of important information directly related to driving a car, such as distance information with other cars and information on the number of cars. There is no proper presentation.
Regarding collision prevention, one-on-one systems and partial and limited experiments have been carried out, but even if you try to put this into practical use, it is not appropriate for preventing encounter collisions, and there are curves that have poor prospects. However, there is a problem that it is not easy to prevent a collision in a place where a plurality of cars are complicated.
Furthermore, there is a problem that there are many dangerous areas to install such equipment on the roadside, and a huge amount of equipment is required.
[0007]
The present invention has been made to solve the above-described problems, and collects individual position information based on high detection accuracy and feeds it back to each target individual user to quickly give alarm information, or alarm information Get device, system.
[0008]
[Means for Solving the Problems]
The danger advance warning mobile device according to the present invention is a mobile device that communicates with the center to obtain information on other mobiles.
A position side portion that identifies an area by position information;
A reservation transmitter that secures a communication slot for communication with the center;
A vehicle information generating unit for generating identification information including own position information to be transmitted to the center by the reserved communication slot;
An information selection unit for selecting necessary information based on identification information from information received from the center;
An information analysis unit that analyzes the selected information and performs output for each danger warning classified based on a predetermined threshold value.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
FIG. 1 is a diagram showing an image of the entire danger prior notice transmission / reception system according to the first embodiment. FIG. 2 is a diagram illustrating a signal transmission / reception relationship with an information distribution center via a satellite at an intersection as an example of a dangerous area.
In these figures, the quasi-zenith satellite 220 indicates, for example, slot reservation from the mobile (communication) device 300 mounted in each automobile, communication to the center device 400 after slot allocation, and the area transmitted from the center device 400. Relay information.
The center device 400 transmits, as a broadcast signal, dangerous area information corresponding to an area such as the A area, which is each pinpoint dangerous area. The broadcast signal to be transmitted divides the pinpoint dangerous area into a plurality of dangerous areas (for example, District A, District B, District C, etc.), and transmits district information corresponding to each divided region. In FIG. 1, A district information, B district information, and C district information are shown as an example.
[0010]
The mobile device 300 is triggered by a signal from the notification instruction device 500 installed in advance in a dangerous area defined by the system, for example, in the area A by receiving a GPS signal, or in each dangerous area boundary. A communication slot is reserved for the center apparatus 400. Further, when a slot is allocated after the reservation, the driving information including the position of the vehicle received from the previous notification instruction device 500 or the GPS (Global Positioning System) satellite 210 is periodically directed to the center device, for example, every 0.1 second. Send to. At the same time, other car information about the A area is periodically extracted from the broadcast signal via the satellite from the center device.
FIG. 2 shows a relational position with another vehicle group and an operation concept performed by the mobile device at the intersection as the dangerous area in the first embodiment. That is, by using the accurate position information of the notification instruction device 500 and the like and the communication path with a high transmission / reception probability by the quasi-zenith satellite 220, the degree of approach is known from the speed and position of other vehicles, and the danger warning zone (distance) is entered. At this time, a corresponding attention is given, a warning is issued when the danger notification zone is reached, and an avoidance instruction is output when entering an avoidance instruction zone where a dangerous state such as a collision is expected. For example, in an automobile that allows external braking input, the brake is output and output.
[0011]
FIG. 3 is a diagram illustrating a configuration example of the mobile device 300.
In the figure, an antenna 311 is installed outside the mobile device 300 and receives a GPS signal emitted from a GPS satellite 210 or position information from a notification instruction device 500 installed at the boundary of a dangerous area. The GPS equivalent signal receiving unit 312 converts the GPS equivalent signals received by the antenna 311 into signals, and the position positioning unit 313 identifies the area. At this point, the mobile device 300 knows that it has entered the A area as a dangerous area. Note that detailed description of the position specifying process for specifying the position or area of the mobile device 300 using the GPS signal is omitted here. In addition, when calculating position information by GPS, a signal is received via the quasi-zenith satellite 220 and used as a correction signal for acquiring position information with high accuracy. However, description of this point is also omitted. Further, if the correspondence between the accurate location information and the regional information such as the A district and B district obtained in advance is stored as a table, the location information can be obtained even if the location information cannot be obtained from the notification instruction device 500. The positioning unit 313 refers to the table to detect that it has entered the dangerous area, but detailed description of this is also omitted here.
[0012]
The antenna 321 is installed outside the mobile device 300 and receives a transmission toward the quasi-zenith satellite 220 and a broadcast signal from the center device. With respect to the transmission signal from the mobile device 300, first, a slot reservation signal is generated by the vehicle information generation unit 334, triggered by signal reception from the notification instructing device that has entered the danger area, and the reservation / own vehicle information transmission unit A slot is requested from 333 toward the center device. Synchronous with this transmission, reception from the satellite begins.
When a prescribed slot is assigned after the center device accepts this, the vehicle information generation unit 334 generates current position information on the mobile device indicated by the previous position measurement unit 313 and information such as the speed and direction of the vehicle. Then, it is periodically transmitted from the reservation / own vehicle information transmission unit 333.
[0013]
Regarding the reception from the center device, the downlink signal from the antenna enters the signal receiving unit 322, and the information selecting unit 323 uses the district identifier in the broadcast signal received by the signal receiving unit 322, and the own vehicle is present. A district information corresponding to the dangerous area is selected and sent to the information analysis unit 330. This transmission / reception is performed, for example, every 0.1 second. When the center apparatus processes information and gives an alarm directly for each individual vehicle including an identifier, the information analysis unit 330 receives this and sends it to the output unit 324. The output unit 324 outputs this information to the display device 325. In addition, the number of other automobiles, that is, traffic information and related information such as the degree of congestion are transmitted as broadcast signals from the center device.
The display device 325 is a device that displays information output by the output unit 324. As an example of the display device 325, any device that can display information (still images, moving images, text information, image information, etc.) such as a monitor and a liquid crystal screen may be used. In the case of a warning output, an output that directly acts on the sense of the driving person, such as a voice or an alarm sound, is output. Further, when entering the avoidance instruction zone and the vehicle accepts it, it becomes a braking output.
[0014]
Next, the configuration of the center device 400 will be described with reference to FIG.
The center device receives a slot reservation signal from the mobile device 300 via the quasi-zenith satellite 220 from the antenna 411 and periodic vehicle information after the slot assignment. Information from such a mobile device is received by the transmission signal reception unit 412, and is sent to the slot and transmission management unit 420 in the case of slot reservation.
In the case of own vehicle information, the information is sent from the transmission signal receiving unit 412 to the information collecting unit 414. In the present embodiment, the center device 400 collects periodic own vehicle information sent from each mobile device, classifies the information by district, summarizes the information as district information, and the target dangerous area, for example, Gather information about the cars equipped with mobile devices in the A area by identifying the time. The information editing unit / collision information calculation unit 421 is arranged in each area of the danger notice zone, the danger notification zone, and the avoidance instruction zone based on the relative position, direction, and speed of each vehicle in the area collected by the information collection unit 414. Extract and calculate a car. Since the car runs on the road and the information is obtained every 0.1 second, the relative distance can be calculated relatively easily if the position and direction are known. For example, from the data up to 0.1 seconds ago, it can be seen that the following car is 80 km / h, and that I am running at 60 km / h, and the distance between cars at that time was 100 m, and about 6 m after 1 second. The distance is reduced and the distance is 94 m. These are converted into a format required by the information generation unit 417, and district information such as the A district is added from the district information memory 418, and transmitted from the broadcast signal transmission unit 419 in a downlink slot.
[0015]
Here, communication slot reservation will be described.
FIG. 4 is a diagram for explaining this slot, and shows a case where the A district is an intersection. Further, links 1 to 4 where roads from four directions intersect with a circle in FIG. 4B are places where the notification instruction device 500 is placed. As shown in FIG. 4A, each notification instruction apparatus has a fixed number of communication slots, in this case, 10 slots each, but 5 slots are allocated to the link 5. When a vehicle equipped with the mobile device 300 enters the area A shown in the circle from the link 1 and makes a slot reservation, a slot that is free from the slots 1 to 10 is assigned.
When a vehicle equipped with the mobile device 300 exits the A area, that is, when any of the links passes from the inside of the circle to the outside of the circle, a slot return trigger is triggered. In this case, the slot used in the slots 1 to 10 is used. To be released. The configuration of the communication slot shown in FIG. 4 (A) is that the slot instruction portion to the mobile device that has received a reservation and the subsequent broadcast signal to the A area are cycle 1 as the downlink from the center device to the mobile device. Form. As an uplink from the opposite mobile device, the mobile device starts with a reservation slot for placing a slot reservation from each mobile device, and the mobile device transmits the vehicle information described above to each slot according to the assignment.
The reservation of the slot to the center device is performed by a random access method. In addition, in the above explanation, an example in which the release that is the end of the slot is performed by detecting the passage of another link has been described. However, for example, it is assumed that the vehicle is parked in the A district or stopped and the engine is turned off. The slot may be released by detecting that the slot is not used for a certain period of time.
[0016]
Here, the quasi-zenith satellite 220 will be briefly described.
FIG. 6 is a diagram showing a technology related to a quasi-zenith satellite planned in the future. In the figure, as an example, the quasi-zenith satellite 220 orbits around 35800 km above the ground so as to have an inclination angle of about 45 degrees from the equator plane in accordance with the rotation of the earth once a day. As an example, three quasi-zenith satellites 220 are arranged so as to be 120 degrees apart at the ascending intersection eclipse (intersection with the equatorial plane).
The three quasi-zenith satellites 220 are located above Japan without a break so that the orbital planes are different but change every 8 hours. Further, when considering the region in Japan, there will always be a quasi-zenith satellite 220 with an elevation angle of 70 degrees or more. Because it is located above Japan without a break, there is always a quasi-zenith satellite 220 with an elevation angle of 70 degrees or more, and when the receiver receives radio waves from the quasi-zenith satellite 220 on the ground, the radio waves can be blocked even in the valleys of the building. There is no.
Therefore, the danger area warning information system uses the advantages of the quasi-zenith satellite 220 described above, and for example, there are no signal signals that are said to be 2000 places in danger areas where a rear-end collision or the like is likely to occur. It is intended to send danger information in detail to automobiles approaching danger areas such as intersections, winding mountain roads, and cliffs.
In addition, if the quasi-zenith satellite is used, it is possible to increase the position accuracy (in cm) and shorten the position calculation time (several seconds or less).
[0017]
The quasi-zenith satellite 220 covers the whole country of Japan with one beam and is divided into a system composed of one center device, or a plurality of center devices that relay the whole country of Japan with beams 1 to N as shown in FIG. An antenna corresponding to the number of beams is provided. The quasi-zenith satellite 220 receives a broadcast signal transmitted from the center device 400 using an antenna corresponding to the center device, and emits a broadcast signal for each region. In this manner, the quasi-zenith satellite 220 relays the broadcast signal transmitted from the center apparatus 400.
As for the district information, as shown in the concept of FIG. 1, the beam is further shared by time division, frequency division, code division, etc., and A district information, B district information, etc. are broadcast in order. Cycle 1 shown in FIG. 4 (A) shows a part of the broadcast for the A district shared among them. The A district information may be displayed in the header portion of the frame including these mini-slot groups, and each mobile device 300 may be identified when receiving the frame. Anyway, each mobile device can extract the district information from the specific beam, and can know whether or not it is broadcast to itself by the information selection unit 323 from the mini-slot group.
[0018]
Next, the operation of the mobile device 300 will be described using the operation flowchart of FIG. 8 and the configuration diagram of FIG.
If the mobile device is running, the GPS signal receiving unit receives the position signal in step (hereinafter referred to as S) 11, and in S12 the position positioning unit can identify the area in which it is running. In this state, for example, when receiving the signal from the notification instruction device or referring to the GPS signal and the stored area correspondence table as described above and knowing that the A area has been entered, the process proceeds from S13 to S14. Then, the reservation / own vehicle information transmission unit 333 transmits a slot reservation signal to the center device.
When the slot assignment from the center device 400 is received in S15, the own vehicle information generation unit 334 periodically transmits the direction / position information on the assigned uplink slot in S16. This continues until the positioning unit detects that it has left the A area in S17.
[0019]
On the other hand, when it is known in S13 that the danger area has been entered, reception of broadcast from the center apparatus is started in S21, and extraction of the downlink slot is started. In S22, the information selection unit 323 filters the current district, and in S23, extracts received information having the same slot number. The information analysis unit 330 analyzes the matched information in S24, knows which zone is in the danger notice, danger notice, and avoidance instruction, and instructs the output unit 324 to perform the corresponding processing.
In this way, the mobile device transmits its own information using the upstream slot and receives the downstream slot information to know the danger and to avoid the collision finely.
[0020]
Next, the operation of the center apparatus 400 will be described using the operation flowchart of FIG. 9 and the configuration diagram of FIG.
The signal from the antenna 411 is received, and the slot and transmission / reception management unit 420 constantly monitors whether the slot request of S31 is received or whether the vehicle information from the mobile device 300 of S41 is received. ing. When the slot allocation request is received from the mobile device, the slot / transmission / reception management unit 420 confirms the slot availability in S32, and if there is a slot, allocates the slot in S33 and places it in the slot instruction described in FIG. And transmit in S44.
[0021]
Further, when the vehicle information is received in S41, the information collecting unit 414 collects information, and the information editing / collision information calculating unit 421 performs information processing at a timing separately determined in S43. At this time, the position of each car, and in some cases, the speed and the position information are input as the own vehicle information, and the direction is also known. The relative position is known. Therefore, in S44, the information generation unit 417 classifies them according to the districts, and transmits them from the broadcast signal transmission unit 419 in correspondence with the slots based on the identification symbols.
With such a large center device and satellite communication equipment that can simultaneously transmit and receive a wide area simultaneously, it is possible to grasp the relative position information of automobiles etc. in many districts over a wide area and quickly. I can deal with it.
Target dangerous areas include no signal intersections, cliffs, winding mountain roads, roads with poor prospects, etc. If you set these areas as dangerous areas, you will enter these areas and run until now. It is possible to warn a vehicle or the like that has no warning method.
[0022]
Embodiment 2. FIG.
In the previous embodiment, the system for performing slot reservation directly from the mobile device to the center device has been described. However, dedicated slot communication (DSRC for short) is used as a repeater for slot reservation. The system to perform is explained.
FIG. 10 is a diagram for explaining DSRC. In the figure, the DSRC antenna has a limited directivity and has a communication range of about 3 to 30 m. However, it has an extremely wide bandwidth and can perform bidirectional high-speed communication with the mobile device 301 which is an on-board ETC device mounted on an automobile that passes at high speed. The information center 510 on the center side that manages the high-speed communication is connected to a plurality of DSRC antennas, and manages communication for each antenna.
[0023]
As a configuration related to this system, a DSRC antenna 411b is placed on each of the links 1 to 5 shown in FIG. This also serves as the notification instruction apparatus of FIG. The mobile device 301 communicates with the information center 510 of the DSRC system for slot reservation and receives slot allocation. Therefore, the slot reservation is transmitted to the DSRC antenna. Therefore, the information center 510 has the function of the slot management unit in FIG. In other words, a partial substitute operation is performed in the sense of acting on behalf of the assignment for communication slot reservation.
[0024]
This operation will be described.
In the present embodiment, the reservation / own vehicle information transmission unit 333 of the mobile device 301 transmits the slot reservation toward the DSRC antenna 411b. That is, in FIG. 8, SS14 and S15 communicate with the DSRC system.
When the information center 510 receives the reservation slot allocation request shown in FIG. 4A from the mobile device 301 by each DSRC antenna 411b, it is divided and managed by the managed links 1 to 5, and has entered. If there is an empty link, the slot is transmitted to each mobile device 301 from each DSRC antenna 411b as a slot instruction signal.
After receiving the slot assignment, the same operation as in the first embodiment is performed. That is, the mobile device 301 transmits its own vehicle information to the center device 400 via the quasi-zenith satellite 220 this time using the assigned slot.
The downlink transmission contents other than the slot instruction of center apparatus 400 are the same as those in the first embodiment.
[0025]
Embodiment 3 FIG.
In the previous embodiment, a system for obtaining various zones by grasping all the mobile devices in the dangerous area (district) targeted by the center device 400 and calculating the distance between the mobile devices. Indicated. In the present embodiment, the grasping of all the mobile body information of the target area is the same, but a system that performs the relative position detection between mobile body apparatuses on the mobile body side will be described.
The configuration of mobile device 300b in the present embodiment is to have a distance calculation function as the function of information analysis unit 324b in FIG. Further, as a function of the information selection unit 323b, for example, if it is located in the A district, there is a function of obtaining all information having identification symbols of the mobile devices in the entire A district. That is, in S22 and S23, there may be only one down slot to the A area, and a large amount of reception is possible.
On the other hand, the configuration of the center device 400b in FIG. 5 eliminates the distance calculation function as the function of the information editing / collision information calculation unit, and transmits the position information from each moving body, and in some cases, the speed information. And
[0026]
In the operation of this system, the mobile device 300b performs distance calculation.
That is, in FIG. 8, the slot number matching process is not required in S23, and is transmitted collectively from the center apparatus. Upon receiving all the mobile device information, in S24, mobile devices based on the identification symbols in front of themselves or moving in the same direction are extracted, and the distance to them is calculated.
As a result, if it is determined that they are in various zones, the corresponding output is performed in S25.
[0027]
Embodiment 4 FIG.
In each of the previous embodiments, a case has been described in which the center device transmits information from a mobile device in the area using a quasi-zenith satellite in a broadcast format. In the DSRC system shown in FIG. One district antenna 511 that covers all target districts may be provided for each intersection, and the information center 510b may have the role of the center device 400.
That is, in FIG. 10B, the information center 510b has the configuration shown in FIG. Although slot reservation is performed by the DSRC antenna 411b, identification transmission by slots to all subsequent mobile devices is performed from a newly provided district antenna 511 that covers the entire target area. On the other hand, uplink and downlink communication by the allocation slot from the mobile device 301c communicates with the DSRC system through this district antenna.
Although it is difficult in mountainous areas with little traffic, it can be applied to non-signalized intersections with heavy traffic. In addition, as an example in which the present system functions effectively even when there is a vehicle not equipped with the mobile device 301, a surveillance camera or the like is installed on the DSRC antenna, etc. Can be applied, such as a method of notifying the user via DSRC communication.
[0028]
【The invention's effect】
As described above, according to the present invention, the mobile device includes the position side position unit, the reservation transmission unit, the own vehicle information generation unit, the information selection unit, and the information analysis unit. The effect is that you can quickly get alarm information. In addition, if there is equipment on the car side, a forced braking output can be obtained, which has the effect of preventing accidents at encounters.
[Brief description of the drawings]
FIG. 1 is a diagram showing an overall image of a danger pre-warning transmission / reception system according to Embodiment 1 of the present invention.
FIG. 2 is a diagram illustrating a signal transmission / reception relationship between a mobile device and a center device at an intersection serving as a dangerous area.
FIG. 3 is a diagram illustrating a configuration example of a mobile device according to the first embodiment.
FIG. 4 is a diagram illustrating communication slots in the first embodiment.
FIG. 5 is a diagram illustrating a configuration example of a center device according to the first embodiment.
FIG. 6 is a diagram illustrating a quasi-zenith satellite.
FIG. 7 is a diagram showing a state in which a quasi-zenith satellite transmits and receives a beam separately to each district in Japan.
FIG. 8 is a flowchart showing an example of an operation performed by the mobile device.
FIG. 9 is a flowchart showing an example of an operation performed by the center device.
FIG. 10 is a diagram illustrating a configuration example of a DSRC system according to a fourth embodiment of the present invention.
[Explanation of symbols]
210 GPS satellite, 220 Quasi-zenith satellite, 300, 300b, 301, 301c Mobile device, 311, 321 Antenna, 312 GPS equivalent signal receiver, 313 Positioning (area identification) unit, 322 Signal receiver, 323 Information selector 324 output unit, 325 display device, 328 input unit, 329 input device, 330 information analysis unit, 333 reservation / vehicle information transmission unit, 334 vehicle information generation unit, 400, 400b center device, 411 antenna, 411b DSRC antenna 412 (upstream) transmission signal reception unit, 413 communication unit, 414 information collection unit, 15 collection information memory, 417 information generation unit, 418 district information memory, 419 (downlink) signal transmission unit, 420 slot and transmission / reception management unit, 421 Information editing / collision information calculation unit, 500 notification instruction device, 510 information set Ter, 511 district antenna.

Claims (9)

In a mobile device that communicates with the center and obtains information on other mobiles,
A position side portion that identifies an area by position information;
A reservation transmitter for securing a communication slot for communication with the center;
A vehicle information generation unit for generating identification information including the position information of the vehicle for transmission to the center by the reserved communication slot;
An information selection unit for selecting necessary information based on identification information from information received from the center;
A danger pre-warning mobile apparatus comprising: an information analysis unit that analyzes the selected information and performs output for each danger warning classified based on a predetermined threshold. 2. The danger pre-warning mobile device according to claim 1, wherein the reservation transmission unit reserves a communication slot for a slot allocation device that substitutes for the slot allocation function. The information selection unit has a function of simultaneously selecting information related to other mobile devices from the district information, and the information analysis unit calculates a relative position with respect to the other mobile devices. The danger pre-warning mobile device according to claim 1. The danger pre-warning mobile device according to claim 1, wherein the reservation transmitting unit communicates with the center device via a satellite to secure a communication slot. In a center device that communicates with a mobile device and gives predetermined information to the mobile device,
An information collection unit that obtains identification information including position information obtained from the mobile device and stores it as unique information including time identification;
An information editing / collision information calculation unit that generates danger information with other predetermined objects using the predetermined communication slot for each identification information;
A danger pre-warning center device comprising: a transmitter that transmits the information edited / collision information calculated by the communication slot according to identification information. The information editing / collision information calculation unit calculates the distance from the mobile device recognized as necessary based on the identification information from the mobile device, and classified information based on the risk warning classified based on a predetermined threshold. 6. The danger pre-warning center device according to claim 5, wherein generation is performed. 6. The danger pre-warning center device according to claim 5, wherein the transmission unit communicates with the mobile device through a communication slot via a satellite. In the transmission / reception system between the center and the mobile device, the mobile device communicates with the center to obtain the necessary information.
An identification including a position side part for specifying an area by position information, a reservation transmitting part for securing a communication slot for communication to the center, and the position information for transmitting to the center by the reserved communication slot A vehicle information generation unit that generates information, an information selection unit that selects necessary information based on identification information from information received from the center, and the selected information is analyzed and based on a predetermined threshold value A mobile device comprising an information analysis unit for outputting classified warning warnings;
Obtaining identification information including position information obtained from the mobile device, storing information as unique information including time identification, and danger information with other predetermined objects using a predetermined communication slot A center device comprising: an information editing / collision information calculation unit generated for each identification information; and a transmission unit for transmitting the information editing / collision information calculated information by the communication slot for each identification information. Danger advance warning transmission / reception system characterized by. 9. The communication slot assignment device different from the center device is provided, and the mobile device secures a communication slot with the communication slot assignment device and communicates with the center device. Danger pre-warning transmission / reception system described.

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