JP2009134729A - Road-to-vehicle communication apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a road-to-vehicle communication apparatus which prevents an accident such as a collision in the case of unexpected coming up by transmitting information on a vehicle or that on the position of the vehicle at an intersection where within-the-horizon communication is difficult, allows specific control of the vehicle by getting to know precise information on the position of the vehicle, and increase safety of traveling by avoiding transmission of wrong information even when many vehicles exist within a communication range. <P>SOLUTION: The road-to-vehicle communication apparatus is mounted to a vehicle, receives from another vehicle a vehicle ID and vehicle information on another vehicle , and transmits the vehicle ID and vehicle information on another vehicle and the vehicle ID and vehicle information on the vehicle. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention grasps vehicle information and vehicle position information of each vehicle by a base station and a relay station provided at the intersection, and transmits the vehicle information and the vehicle position information to each vehicle so that an encounter collision at the intersection, etc. The present invention relates to a road-vehicle communication device that prevents accidents.

  2. Description of the Related Art Conventionally, a travel support device for communicating travel data between vehicles and maintaining travel safety (see, for example, Patent Document 1).

  In such a travel support device, the travel data of the other vehicle transmitted from the other vehicle or the travel data of the further other vehicle relayed by the other vehicle is received and transmitted to the vehicle of the host vehicle. By issuing an operation command, there is an effect of maintaining the safety of traveling.

JP-A-4-241100

  However, in such a conventional driving support device, transmission and reception of driving data are performed only between vehicles, and in places where line-of-sight communication such as intersections is difficult, accidents such as encounter collisions. It was not something that could prevent.

  In addition, there is a problem in that such a driving support device cannot accurately control the positional relationship between the vehicles, so that detailed vehicle control cannot be performed.

  Furthermore, in such a driving support device, when four or more vehicles exist in the communication range, there is a problem that information on the wrong vehicle may be transmitted by the communication method.

  The present invention has been made in order to solve the above-described problems, and transmits vehicle information and vehicle position information at intersections where line-of-sight communication is difficult to prevent accidents such as encounter collisions. By knowing the position information, it is possible to control the vehicle more precisely, and even if many vehicles are in the communication range, it can increase the safety of driving without transmitting erroneous information. The object is to obtain a communication device.

  The road-to-vehicle communication device according to the present invention is mounted on a vehicle, receives the vehicle ID and vehicle information of the other vehicle from another vehicle, and receives the vehicle ID and vehicle information of the other vehicle, the vehicle ID of the own vehicle, and Send vehicle information.

  The road-to-vehicle communication device according to the present invention is mounted on a vehicle, receives the vehicle ID and vehicle information of the other vehicle from another vehicle, and receives the vehicle ID and vehicle information of the other vehicle, the vehicle ID of the own vehicle, and Send vehicle information. For this reason, vehicle information and vehicle position information can be transmitted at intersections where line-of-sight communication is difficult, and accidents such as encounter crashes can be prevented.

Embodiment 1 FIG.
FIG. 1 is a system configuration diagram of a road-vehicle communication apparatus according to Embodiment 1 of the present invention. In the figure, 1 is a base station, 2 is a relay station A, 3 is a relay station B, 4 is a relay station C, 5 is a relay station D, 6 is a two-wheeled vehicle, 7 is a four-wheeled vehicle A, 8 is a four-wheeled vehicle B, 9 Is a four-wheeled vehicle C, 19 is a four-wheeled vehicle D, 10 is a detection signal from the relay station A2 to a vehicle within the communication range, 11 is vehicle information and winker information transmitted from the two-wheeled vehicle 6 to the relay station 2, and 12 is a relay station Vehicle information and turn signal information of the two-wheeled vehicle 6 transmitted from the A2 to the base station 1, reference numeral 13 represents vehicle information, turn signal information and vehicle position information of the two-wheeled vehicle 6 transmitted from the base station 1 to each vehicle, and reference numeral 14 represents the four-wheeled vehicle A7 to the two-wheeled vehicle 6 Warning information transmitted to the relay station A2 to notify the relay station 15, warning information from the four-wheeled vehicle A7 transmitted from the relay station A2 to the base station 1, and 16 relayed to notify the two-wheeled vehicle 6 from the four-wheeled vehicle B8 Warning information to be transmitted to the station C4, 17 is transmitted from the relay station C4 to the base station 1 Warning information from the automobile B8, 18 is a warning information transmitted from the base station 1 to the two-wheeled vehicle 6.

  The vehicles 7 to 9 and 19, the relay stations 2 to 5, and the base station 1 exchange information with each other by a spread spectrum method using pseudo noise (PN) signals. Spread spectrum is a method in which the band of an information signal is spread over a wide band using a code independent of the information signal, and despread to the original information signal using a code independent of the same information signal at the time of reception. . This enables code division multiple access (CDMA).

  Next, the operation of the road-vehicle communication apparatus shown in FIG. 1 will be described. 2 and 3 show the assignment state. 4 and 5 show the transmission procedure. FIG. 6 shows a procedure from when the two-wheeled vehicle 6 transmits vehicle information and winker information until it receives warning information.

First, as means for assigning a code used for communication by each vehicle, the relay station A2 always transmits using the code PN _mr 10 to detect a vehicle entering the communication area, and receives the code PN _mr 10 The two-wheeled vehicle 6 transmits the vehicle ID using the same code PN _mr 20, and the relay station A2 that has received the vehicle ID uses the code PN _A 21 that is uniquely assigned to the base station 1 for each relay station. query a code motorcycles 6 used for communication, the base station assigns codes PN ₁ used motorcycles 6 using the code _PN a 22, the relay station A2 assigns a code PN ₁ using code _PN mr 10 motorcycles 6.

Code PN 2 where four-wheel vehicles A7 is _used, allocated from the base station 1 using the method also codes PN ₃ of four-wheel vehicles B8 is used.

In FIG. 4, the four-wheeled vehicle D19 is shielded by the four-wheeled vehicle A7 closer to the relay station 2 and cannot directly communicate with the relay station A2, so the four-wheeled vehicle A7 sets the vehicle ID of the four-wheeled vehicle D19. relayed assigned codes PN ₄ communicates with relay station A2.

Motorcycle 6 that won codes PN 1 ₁₁ uses the code PN 1 _11, and transmits the vehicle information and turn signal information of the vehicle to the relay station A2, the relay station A2 is a vehicle information and turn signal information of the two-wheeled vehicle 6, reference numeral to receive by using the PN _1.

Since the code PN ₁ of the two-wheeled vehicle 6 is assigned via the relay station A 2, the relay station A knows that the code assigned to the two-wheeled vehicle 6 is PN ₁ and can receive with the code PN _1. .

The relay station A2 transmits the vehicle information and the blinker information of the two-wheeled vehicle 6 using the code PN _A 12 previously assigned to the base station 1, and the base station 1 receives the signal of the code PN _A from the relay station. Then, vehicle information and turn signal information of the two-wheeled vehicle 6 are acquired.

The base station 1 acquires the vehicle information and the winker information of the two-wheeled vehicle 6 by using the code PN _A 12 and receives the vehicle information of the two-wheeled vehicle 6 from the relay station A2, so that the two-wheeled vehicle 6 enters the communication range of the relay station A2. The vehicle position information of the two-wheeled vehicle 6 can be acquired.

The base station 1 transmits the vehicle information, the blinker information, and the vehicle position information of the two-wheeled vehicle 6 obtained by the above method using the code PN _ba over the entire intersection.

  The four-wheeled vehicle A7, the four-wheeled vehicle B8, the four-wheeled vehicle C9, and the four-wheeled vehicle D19 receive vehicle information, turn signal information, and vehicle position information of the two-wheeled vehicle 6 from the base station 1, and the two-wheeled vehicle 6 is dangerous to the own vehicle. It is judged whether it is in a state.

In FIG. 1, the traveling direction of the two-wheeled vehicle 6 is known from the turn signal information, and when it is in a dangerous state for the four-wheeled vehicle A7, warning information is transmitted using the code PN ₂ 14 acquired in advance.

In FIG. 1, the traveling direction of the two-wheeled vehicle 6 is known from the turn signal information, and when it is in a dangerous state for the four-wheeled vehicle B8, warning information is transmitted using the code PN ₃ 16 acquired in advance.

  In FIG. 1, the traveling direction of the two-wheeled vehicle 6 is known from the turn signal information, and the warning information is not transmitted when it is not dangerous for the four-wheeled vehicle C9.

  When it is determined that the four-wheeled vehicle D19 is in a dangerous state and warning information is transmitted to the relay station A2, the four-wheeled vehicle A7 is shielded from the relay station A2, and therefore, the four-wheeled vehicle A7 is relayed and relayed. Send to A2.

RS A2 receives the warning information transmitted using code _PN 2 14 from four-wheeled vehicles A7, transmitted using code _PN A 15 to base station 1.

The relay station C4 receives the warning information transmitted from the four-wheeled vehicle B8 using the code PN ₃ 16, and transmits the warning information to the base station 1 using the code PN _C 17.

The base station 1, which receives warning information from the code PN A ₁₅ in automobiles A7 from the relay station A2, receives the warning information in the code PN C ₁₇ from four-wheel vehicles B8 from the relay station C4, the information _Is transmitted to the entire intersection using the code PN _ba 18.

The two-wheeled vehicle 6 receives warning information transmitted from the base station 1 using the code PN _ba 18, and realizes prediction of danger.

  In this embodiment, vehicle information, blinker information, and vehicle position information are transmitted at intersections where line-of-sight communication is difficult, and accidents such as entanglement, right-right collision, and head-on collision can be prevented. Includes means for receiving the other vehicle information from another vehicle and transmitting the other vehicle information to the relay station, so that communication can be performed without being blocked by a vehicle closer to the relay station.

Embodiment 2. FIG.
FIG. 7 is a system configuration diagram of a road-vehicle communication device according to Embodiment 2 of the present invention. In the figure, 31 is a base station, 32 is a two-wheeled vehicle, 33 is a four-wheeled vehicle A, 34 is a four-wheeled vehicle B, 35 is a four-wheeled vehicle C, and 36 is vehicle information, winker information, vehicle transmitted from the two-wheeled vehicle 32 to the base station 31. Position information, 37 is vehicle information, winker information, vehicle position information of the two-wheeled vehicle 32 transmitted from the base station 31 to each vehicle, 38 is warning information transmitted from the four-wheeled vehicle A33 to the base station 31 to notify the two-wheeled vehicle 32, 39 is warning information transmitted from the four-wheeled vehicle B34 to the base station 31 to notify the two-wheeled vehicle 32, and 40 is warning information from the four-wheeled vehicle A33 and the four-wheeled vehicle B34 transmitted by the base station 31.

  Next, the operation of the road-to-vehicle communication device shown in FIG. 7 will be described. FIG. 8 shows a procedure until the motorcycle 32 transmits vehicle information, blinker information, and vehicle position information and receives warning information.

First, as a means for assigning a code to be used for each vehicle to communicate, the base station 31 has been transmitted using constantly PN _ba, motorcycle 32 receives the code PN _ba, using the same reference numerals PN _ba vehicle The base station 31 that transmits the ID and receives the vehicle ID assigns the code PN ₁ 36 to the two-wheeled vehicle 32.

Code PN ₂ where four-wheel vehicles A33 is used, allocated from base station 31 by using the above means also code PN ₃ using the four-wheeled vehicle B34.

The two-wheeled vehicle 32 transmits the vehicle information of the own vehicle, the blinker information, and the vehicle position information acquired using the K-GPS to the base station 31 using the code PN ₁ 36.

The base station 31 receives the vehicle information, turn signal information, and vehicle position information of the two-wheeled vehicle 32 and transmits the received information to the entire intersection using the PN _ba 37.

Automobiles A33 and four-wheeled vehicles B34, the vehicle information of the two-wheeled vehicle 32 received, winker information, determines that the dangerous condition from the vehicle position information, the base station 31 warning information using code _PN 2 38 and code _PN 3 39 Send to.

The base station 31 receives warning information from the four-wheeled vehicle A33 and the four-wheeled vehicle B34, and transmits the warning information to the entire intersection using the code PN _ba 40. The motorcycle 32 receives the warning information relayed by the base station 31, and realizes danger prediction.

  By using K-GPS as means for acquiring vehicle position information, accurate vehicle position information can be known, and finer vehicle control is possible.

  In the road-vehicle communication apparatus according to the present invention, the relay station is provided on the shoulder of each road toward the intersection, and receives vehicle information transmitted from each vehicle entering the intersection, and transmitted from each relay station. The vehicle information is received, and the position of each vehicle is grasped based on the vehicle information and the determination as to which vehicle information is transmitted from which relay station, and the obtained vehicle information and each vehicle position information are And a base station that transmits to surrounding vehicles. For this reason, vehicle information and vehicle position information can be transmitted at intersections where line-of-sight communication is difficult, and accidents such as encounter crashes can be prevented.

  Further, in the road-to-vehicle communication device according to another invention, the vehicle position acquisition means for acquiring the vehicle position of the own vehicle is received and vehicle information and vehicle position information transmitted from the vehicle entering the intersection are received, And a base station that transmits the obtained vehicle information and vehicle position information to surrounding vehicles. Therefore, accurate vehicle position information can be known, and finer vehicle control becomes possible.

  Vehicle information and vehicle position information exchanged between the vehicle and the base station are exchanged using a spread spectrum system. Therefore, it is possible to transmit a broadcast, and furthermore, code division multiple access is possible.

  In the spread spectrum system, pseudo noise (PN) signals are used for transmission and reception, and pseudo noise signals are allocated and managed in the base station. Therefore, even if many vehicles exist within the communication range, it is possible to increase the safety of traveling without transmitting erroneous information.

  Furthermore, when the base station determines that the specific vehicle is dangerous from the vehicle information and the vehicle position information, the base station transmits warning information to the vehicle. Therefore, it is possible to warn a dangerous vehicle.

It is a system configuration | structure figure of the road-vehicle communication apparatus which concerns on Embodiment 1 of this invention. It is a schematic diagram which shows allocation of a code | symbol. It is a chart which shows the order of code allocation. It is a schematic diagram which shows the procedure of transmission. It is a chart which shows the procedure of transmission. It is a chart which shows the procedure after a motorcycle transmits vehicle information and blinker information until it receives warning information. It is a system block diagram of the road-vehicle communication apparatus which concerns on Embodiment 2 of this invention. It is a chart which shows the procedure until a two-wheeled vehicle transmits vehicle information, blinker information, vehicle position information, and receives warning information.

Explanation of symbols

  1, 31 Base station 2, 3, 4, 5 Relay station, 6, 32 Two-wheeled vehicle (vehicle), 7, 8, 9, 19, 33, 34, 35 Four-wheeled vehicle (vehicle).

Claims (3)

  The vehicle is mounted on a vehicle, receives the vehicle ID and vehicle information of the other vehicle from another vehicle, and transmits the vehicle ID and vehicle information of the other vehicle, the vehicle ID of the own vehicle, and the vehicle information. Road-to-vehicle communication device.   The road-vehicle communication apparatus according to claim 1, wherein the vehicle information and the vehicle position information exchanged by the road-vehicle communication apparatus are exchanged using a spread spectrum system.   3. The road-to-vehicle communication apparatus according to claim 2, wherein in the spread spectrum system, a pseudo-noise (PN) signal is used for transmission and reception, and the pseudo-noise signal is allocated and managed in a base station.

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