JP2003091795A - On-vehicle device for communication between road and vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make suppressible the increase of the installation cost and the mounting space of an on-vehicle device for communication between a road and a vehicle even in the case of receiving various services using the communications between the road and the vehicle. SOLUTION: The on-vehicle device is so structured that information corresponding to a content of each service such as VICS, ETC, AHS is received from a road side through a common antenna 10 and a radio processing part 20. Application process corresponding to each of the service is performed by a common computer (MPU 140), and a process result is presented to a user through a common display device and voice output device. Therefore, various service using the communication between the road and the vehicle can be received while suppressing the increases of the installation cost and the mounting space.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle device for road-to-vehicle communication mounted on a vehicle for road-to-vehicle communication.

[0002]

2. Description of the Related Art Conventionally, DSRC (Dedicated Short Range)
Communications (Vehicle Information and Commu
nication System: Road Traffic Information Communication System), ETC
Services such as (Electronic Toll Collection System: non-stop automatic payment system) are provided.

[0003]

However, since these services are in the early stage of popularization, an in-vehicle device (road-vehicle communication in-vehicle device) for communicating with the roadside is prepared for each service, It is installed in each place of the vehicle. In addition, AHS (Advanced Crui
The se-Assist Highway Systems service is also planned to start soon, and in order to receive this service, a vehicle-to-vehicle communication vehicle-mounted device for AHS is also required.

Therefore, when receiving various services, the number of road-to-vehicle communication vehicle-mounted devices increases, which causes an increase in cost and installation space. The present invention has been made against such a background, and it is possible to suppress an increase in installation cost and installation space of a vehicle-to-vehicle communication device even when receiving various services using road-to-vehicle communication. To aim.

[0005]

Means for Solving the Problems and Effects of the Invention In order to solve the above problems, the vehicle-to-vehicle communication device of the present invention (claim 1) is provided for each of a plurality of services provided from the roadside. It is provided with a plurality of processing means for respectively performing processing according to the content of the service, and the plurality of processing means receive information according to the content of each service from the roadside through a common antenna and wireless processing unit. It is configured. Note that the term "antenna" used here includes not only an antenna having a function of transmitting and receiving radio waves but also an antenna having a function of transmitting and receiving light such as infrared rays.

In the vehicle-mounted device of the present invention (Claim 1) thus configured, since the antenna and the radio processing unit (radio device) are shared, it is intended to receive various services using road-to-vehicle communication. In this case, it is possible to suppress an increase in installation cost and installation space.

If a plurality of processing means are realized by causing a common computer to function as described in claim 2, it is possible to further suppress an increase in installation cost and installation space. . According to the invention of claim 2, for example, when communication data is received by the wireless processing unit, one of a plurality of processing means is based on the communication data.
This can be realized by causing the computer to function so as to specify one and start the operation as the specified processing means.

Further, when the plurality of processing means are to present (output) each processing result to the user via the output device, a common output device is used as described in claim 3. The plurality of processing means may be configured to output to the user via the respective processing means. Then, when trying to receive various services using road-to-vehicle communication, it is possible to further promote the suppression of increase in installation cost and installation space.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a vehicle-on-vehicle communication device 1 (hereinafter referred to as “vehicle device”) as an example.

As shown in FIG. 1A, the vehicle-mounted device 1 of this embodiment has an antenna 10, a wireless processing unit 20, an application processing unit 30, an information presentation processing unit 40, a determination processing unit 50,
The vehicle control processing unit 60 is provided. Antenna 10
An in-vehicle antenna that can send and receive radio waves in the 5.8 GHz band. This antenna 10 is commonly used for receiving the VICS service, the ETC service and the AHS service, that is, it corresponds to the "common antenna" in the claims. The antenna 10 may have a light transmitting / receiving function for performing infrared communication.

The radio processing unit 20 transmits / receives communication data via the antenna 10 by the DSRC method, and tunes to radio frequency, frequency conversion between radio frequency and intermediate frequency, signal amplification, modulation / demodulation, Processing such as encoding and decoding is performed. The wireless processing unit 20 is commonly used for receiving the VICS service, the ETC service, and the AHS service, that is, corresponds to the "common wireless processing unit" in the claims.

The application processing unit 30 includes an MPU 140, which will be described later.
It is realized by the functioning of a well-known computer mainly composed of the above, and a plurality of services (ETC service, AHS service in this embodiment) provided from the roadside device.
Service, VICS service, etc.) to execute application processing corresponding to each service.

The information presentation processing section 40 is a HMI (Human Machine Inte) for a user such as a character display process, an image display process and a voice output process using a display device and a voice output device.
rface) process. The determination processing unit 50 is a component necessary for receiving the AHS service, and is for performing determination processing on the vehicle side regarding the validity of the information provided by the AHS service. The vehicle control processing unit 60 controls various actuators in order to control the traveling state of the vehicle. The information presentation processing unit 40, the determination processing unit 50, and the vehicle control processing unit 60 are also realized by the functions of the computer.

Each of the blocks described above can be formed integrally or separately. In this embodiment, as shown in FIG. 1B, the high frequency circuit 110, the modulation / demodulation circuit 120,
From the encoding / decoding unit 130, the MPU 140, the memory 150, the power supply circuit unit 160, and the like, the wireless processing unit 20, the application processing unit 30, the information presentation processing unit 40, the determination processing unit 50, the vehicle control processing unit 60, and the like are integrated. I am configuring.

The high frequency circuit 110 tunes to a predetermined radio frequency, performs frequency conversion to an intermediate frequency, and further amplifies a signal. The modulation / demodulation circuit 120 generates a baseband signal, etc., and the encoding / decoding unit 130 performs MPU 140 such as synchronization detection, error correction, and error detection.
In collaboration with. The decrypted data is stored in the memory 150. The MPU 140 also controls the phase of the PLL in the high frequency circuit 110.

The operation of the on-vehicle device 1 configured as described above will be described with reference to the flowchart of FIG. First, when the communication data is received, which service the communication data corresponds to, that is, the content of the service is determined, and the application process to be executed is specified according to the service (S10). And the communication data is VICS
If it is a service, predetermined VICS data processing such as VICS decoding processing is performed (S20), and if the communication data is an ETC service, predetermined ETC data processing such as ETC decoding processing. (S3
0). If the communication data is for the AHS service, then predetermined VICS data processing such as AHS decoding processing is performed (S40).

VICS data processing (S20) or ETC
After performing the data processing (S30), the information obtained as a result is output from a display device, a voice output device, or the like, and presented to the user (S50). On the other hand, AH
After S data processing (S40), the information obtained as a result is related to vehicle control (vehicle control information)
It is determined whether or not (S60). As a result, if it is not vehicle control information (S60: NO), predetermined information is presented to the user (S50).

If it is vehicle control information (S60: Y)
ES), and further, it is judged whether it is appropriate (S70). That is, based on the user's intention / judgment input in advance, the detection result of the vehicle-mounted sensor, or the like, the validity of the vehicle control is judged. If the vehicle control information is valid (S7)
0: YES), but vehicle control based on it is performed (S8
0) If it is not valid (S70: NO), the user is presented with predetermined information (for example, the judgment result) (S).
50).

Here, the VICS data processing (S20) and the ETC data processing (S30) respectively correspond to separate "processing means" in the claims. Also, AHS
From the data processing (S40), it is determined whether it is vehicle control information (S60) and the validity of the vehicle control information (S60).
70), a series of processes up to the vehicle control process (S80)
It corresponds to one "processing means".

In the information presentation process (S50), S2
A common display device or a common audio output device is used regardless of which one of 0 to S40 is executed.
In addition, in the present embodiment, the display device and the audio output device correspond to the “common output device” in the claims.

As described above, the in-vehicle apparatus 1 of this embodiment is configured to receive information according to the content of each service from the roadside via the common antenna 10 and the wireless processing unit 20. It is possible to suppress an increase in installation cost and installation space when trying to receive various services using road-to-vehicle communication.

Further, VICS data processing (S20), E
TC data processing (S30), AHS data processing (S4
Since processing corresponding to different services such as 0) is realized by operating a common computer,
Furthermore, it is possible to suppress an increase in installation cost and installation space.

Then, VICS data processing (S20),
ETC data processing (S30), AHS data processing (S4
Since the processing result such as 0) is configured to be presented to the user via a common output device (display device, audio output device, etc.), it is possible to further suppress an increase in installation cost and installation space. Can be pushed forward.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment and can take various forms. For example, in the above embodiment, the road-vehicle communication of the DSRC system has been described as an example, but the present invention is not limited to this. By changing the configurations of the antenna and the wireless processing unit in the above embodiment, services for different radio frequencies, modulation / demodulation methods, and coding / decoding methods, such as 2.4 GHz beacons and road-to-vehicle communication using optical beacons, The present invention can be applied.

In the above embodiment, the antenna and the radio processing unit are described as separate components, but the present invention is not limited to this. For example, the radio processing unit 20 and various processing units 30.
˜60 and the like may be integrated with the antenna 10.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a vehicle-on-vehicle communication device according to an embodiment.

FIG. 2 is a flowchart showing the operation of the vehicle-on-vehicle communication device.

[Explanation of symbols]

1 ... Road-to-vehicle communication vehicle-mounted device 10 ... Antenna 20 ... Wireless processing unit 30 ... Application processing unit 40 ... Information presentation processing unit 50 ... Judgment processing unit 60 ... Vehicle control processing unit 110 ... High frequency circuit 120 ... Modulation / demodulation circuit 130 ... Encoding / decoding unit 140 ... MPU 150 ... Memory 160 ... Power supply circuit section

Claims (3)

[Claims] 1. An on-vehicle vehicle-to-vehicle communication device, comprising: an antenna; and a wireless processing unit for transmitting and receiving communication data via the antenna, wherein the antenna and the wireless processing unit communicate with the roadside. Is provided for each of a plurality of services provided by, and includes a plurality of processing means for performing processing according to the content of each service, and the plurality of processing means are connected to a roadside via a common antenna and a wireless processing unit. The vehicle-to-vehicle communication vehicle-mounted device characterized in that it is configured to receive information according to the content of each service from. 2. The in-vehicle communication device for road-to-vehicle communication according to claim 1, wherein the plurality of processing units are realized by a common computer functioning. 3. The vehicle-to-vehicle communication vehicle-mounted apparatus according to claim 1 or 2, wherein the plurality of processing units provide a result of each processing to a user of the vehicle-to-vehicle communication vehicle by using a common output device. An on-vehicle device for road-to-vehicle communication, which is configured to output each.