JP2006059250A - VICS roadside machine and VICS roadside machine communication method - Google Patents

Abstract

[PROBLEMS] To limit the reception area by adjusting the directivity characteristics of a VICS transceiver when conducting commercial information transmission on department stores, restaurants, hotel parking lots and public roads such as private roads before entering the parking lot. There is a method, but there is a problem that unnecessary information is transmitted to an unspecified number of vehicles.
A VICS road machine divides data to be transmitted by a road machine controller 8 in order to provide commercial information only to a vehicle that is running or stopped at a low speed, and controls the transmission timing together. The data is transmitted to the light emitting / receiving unit 2 as long time interval data. Even if a part of the information reaches a large number of unspecified vehicles in general traveling by this processing, all the divided frames are not received, and therefore unnecessary information is not displayed on the navigation device 300.
[Selection] Figure 1

Description

  The present invention relates to a VICS on-road vehicle that provides commercial information such as advertisements to a VICS receiver or a navigation device using a road-to-vehicle communication device such as VICS (Vehicle Information Communication System) or UTMS (Universal Traffic Management System). In particular, the present invention relates to a VICS roadside machine and a VICS roadside machine communication method that do not transmit unnecessary information to an unspecified number of vehicles.

  Using optical beacon VICS and radio beacon VICS, traffic information, traffic time information, traffic fault information such as accidents and road construction, traffic information, and parking space availability information are received by the in-vehicle VICS receiver and displayed on the navigation device VICS information systems are widely used.

  Japanese Patent Application Laid-Open No. H10-228561 discloses a technology relating to providing commercial information in a wide area including optical beacon VICS, radio beacon VICS, and FM multiplex broadcast VICS. According to Patent Document 1, by providing commercial information using VICS, a user can receive and use commercial information such as advertisements in each area while traveling by car, and a client who requests commercial information. Can provide advertisements efficiently.

JP2002-195842

  The optical beacon VICS system operated by the VICS Center is a two-way communication system that uses infrared rays. However, it is mainly intended to provide road traffic information and is limited to the transmission of public information related to vehicle travel. The current situation is not possible.

  Under these circumstances, when the application of commercial information transmission is performed on public roads such as department stores, restaurants, hotel parking lots, and private roads before entering the parking lot, the directivity characteristics of the VICS transceiver are adjusted. There is a method of limiting the reception area, but there is a problem that unnecessary information is transmitted to an unspecified number of vehicles.

  In order to solve the above-described problems, a VICS road vehicle according to the present invention is a VICS road vehicle that provides commercial information to a navigation device mounted on a vehicle in a data communication area where data communication is possible. Is obtained from the outside and stored in a commercial information storage unit, passing time setting means for setting the passing time of the vehicle as a passing time, and data for converting commercial information to VICS data that can be transmitted based on the set passing time Conversion means and VICS data communication means for communicating the VICS data converted by the data conversion means to the navigation device. The data conversion means divides the commercial information into a plurality of data and is distributed within the transit time. A VICS roadside machine characterized by converting into VICS data.

  Further, in the VICS roadside equipment according to the present invention, the data conversion means arranges the commercial information in the second half of the VICS data based on the passage time.

  Further, in the VICS roadside equipment according to the present invention, the VICS data communication means includes a communication area variable means for expanding or reducing the data communication area based on the information amount of the commercial information recording unit.

  The VICS roadside machine communication method according to the present invention is a VICS roadside machine communication method that provides commercial information to a navigation device mounted on a vehicle in a data communication area where data communication is possible. A commercial information storage process, a transit time setting process for setting a time for the vehicle to pass through a data communication area capable of data communication, and a VICS data capable of communicating commercial information based on the set transit time. A data conversion step for converting, and a VICS data communication step for transmitting the VICS data converted in the data conversion step to the navigation device. The data conversion step divides the commercial information into a plurality of data and distributes it within the transit time. It is characterized by converting into converted VICS data.

  In the VICS on-road equipment communication method according to the present invention, the data conversion step is characterized in that commercial information is arranged in the latter half of the VICS data based on the passage time.

  Furthermore, in the VICS roadside machine communication method according to the present invention, the VICS data communication step includes a communication region variable step of expanding or reducing the data communication region based on the information amount of the commercial information recording unit.

  According to the present invention, even if a part of the information reaches a large number of unspecified vehicles in general traveling without adversely affecting public non-profit information, all the frame IDs divided into a plurality are not received. There is an effect that unnecessary information is not displayed on the navigation device.

  Hereinafter, embodiments of the present invention (hereinafter referred to as embodiments) will be described with reference to the drawings. In this embodiment, the optical beacon VICS roadside device, the optical beacon VICS in-vehicle device, and the optical beacon VICS communication device are referred to as an optical beacon roadside device, an optical beacon in-vehicle device, and an optical beacon communication device.

  FIG. 1 is an overall configuration diagram showing an overall configuration of an optical beacon communication device including an optical beacon roadside device 100, an optical beacon vehicle-mounted device 200, and a navigation device 300 in the present embodiment. The configuration of the optical beacon communication device will be described with reference to FIG.

  The optical beacon communication device roughly includes three devices, which are an optical beacon roadside device 100 installed on the road, an optical beacon vehicle-mounted device 200 and a navigation device 300 mounted on the vehicle 400.

  The optical beacon roadside device 100 includes an optical beacon receiving / emitting unit 2, a transmitting unit 6, a receiving unit 4, a memory unit 12 that temporarily stores programs and work data, an I / F unit 10 that can be connected to the outside, and A road unit control unit 8 for controlling the optical beacon road unit 100 is included. Further, it is connected to the external PC 14 via the I / F unit 10.

  In addition, the light emitting / receiving unit of the optical beacon is separated by the inner light emitting / receiving unit 2a and the outer light receiving / emitting unit 2b, and the reachable range of the optical beacon signal can be changed.

  Next, the optical beacon vehicle-mounted device 200 and the navigation device 300 mounted on the vehicle 400 will be described. The optical beacon vehicle-mounted device 200 includes an optical beacon receiving / emitting unit 22, a transmission unit 26, a reception unit 24, a memory unit 32 that temporarily stores a program and work data, and an on-vehicle device control unit 28 that controls the optical beacon vehicle-mounted device 200. Is included.

  The navigation device 300 temporarily stores a GPS antenna 44 for positioning itself, a gyro 46 for measuring vehicle movement information, a DVD / HDD drive 34 in which map and navigation software are stored, a program and work data. It includes a memory unit 36 that stores data, a remote controller 40, a navigation control unit 38 that controls the monitor 42 and the navigation device 300. In addition to displaying navigation information, the monitor 42 of the navigation device 300 can display various types of light information.

  Further, the vehicle 400 is equipped with an ECU 48 (Engine Control Unit) that provides various information such as vehicle speed, acceleration, and deceleration state.

  FIG. 2 is an explanatory diagram showing a service area of the optical beacon roadside device 100 in the present embodiment. The optical beacon road machine 100 implemented in the present embodiment is different from an optical beacon road machine connected to a normal traffic center as a single simple optical beacon road machine at a parking lot entrance of a department store, a restaurant, a hotel, etc. Installed to provide users with unique information instead of normal road traffic information. The uplink and downlink areas of the optical beacon roadside device 100 and the optical beacon vehicle-mounted device 200 will be described with reference to FIG.

  When the vehicle 400 approaches the optical beacon road machine 100 and enters an area from about 5 meters to about 3 meters from directly below the optical beacon road machine 100, uplink and downlink are possible. When further approaching and entering an area of about 3 meters from just below the optical beacon roadside machine 100, the downlink becomes possible. After that, the gate 500 is opened to enter the parking lot.

  The uplink signal transmission speed from the optical beacon on-vehicle device 200 to the optical beacon on-road device 100 is 64 kbps, and the downlink signal transmission speed from the optical beacon on-vehicle device 100 to the optical beacon on-vehicle device 200 is 1024 kbps.

  Thus, the signal transmission speeds of the downlink and the uplink are different, and when the optical beacon roadside device 100 performs full-duplex optical communication with the optical beacon vehicle-mounted device 200, they are arranged close to each other. The light receiving unit is designed not to accept it as received light by mistake.

  Also, the downlink signal transmission rate is higher than the uplink signal transmission rate because the amount of information transmitted from the optical beacon roadside device 100 to the optical beacon onboard device 200 is higher than the optical beacon onboard device 200. This is because the amount of information transmitted to the optical beacon roadside device 100 is larger.

  Furthermore, in the present embodiment, in order to make the service area by the optical beacon roadside machine 100 variable between a narrow area and a wide area by the control from the roadside machine control unit 8, only the inner light emitting / receiving unit 2a is used in the narrow area. In a wide area, the inner and outer light emitting / receiving sections (2a, 2b) are used simultaneously.

  (Table 1) is a table showing the relationship of communication establishment in the combination of the transit time setting based on the traveling speed of the vehicle and the frame division.

（表１）において、光ダウンリンク通信可能領域を３．７ｍとし、０．６７秒間隔に均等にデータを割り当てる処理を行い、時速を７０ｋｍ／ｈ、１０ｋｍ／ｈ、５ｋｍ／ｈの３つの条件とし、通信が確立又は不成立を調査した。

In (Table 1), the optical downlink communicable area is set to 3.7 m, data is allocated evenly at intervals of 0.67 seconds, and the three speeds are 70 km / h, 10 km / h, and 5 km / h. And investigated whether the communication was established or not established.

  As shown in Table 1, in a vehicle traveling at a speed of 70 km / h, the transit time is 0.19 s, and communication is not possible at all.

  When the speed of the vehicle decreases to 10 km / h, the transit time is 1.37 s, and the number of communications can be secured twice. However, since the number of data divisions is set to “3”, all data is not collected and communication is not established. Further, when the speed of the vehicle is reduced to 5 km / h, the transit time becomes 2.74 s, and the number of communications exceeds 4 and the division number “3”. Therefore, all data can be collected and communication is established. Next, the data format of the transmitted downlink will be described.

  FIG. 3 is a data format diagram showing a data format configuration in downlink communication from the optical beacon roadside device 100 to the optical beacon vehicle-mounted device 200 in the present embodiment. The data structure of the downlink includes a transmission control signal of “synchronization part”, a “header part” including attribute information, an “real data part” including at least one of actual character information and graphic data, and error correction. The “CRC part” is included.

  Furthermore, the “header part” records a “type” indicating a data type, a “time” indicating a provision time provided from the optical beacon roadside device 100, presence / absence of divided frames, and a frame number for identifying each frame. "Frame ID" and "effective data length" recorded in the actual data part.

  Furthermore, the “type” indicates a “standard flag” indicating whether the UTMS standard or non-standard, a “operation flag” indicating whether the provided information is operation data or test data, and a provided data type of the downlink information. An “information type ID” is recorded.

  In the present embodiment, a total of 133 bytes of data of the synchronization part, header part, actual data part, and CRC part in the downlink data format shown in FIG. 3 is one frame, and a plurality of frames are collected and transmitted. A cycle is realized.

  FIG. 4 is an explanatory diagram showing a conventional transmission cycle and a transmission cycle in the present embodiment. (A) is an example of a conventional transmission cycle. The ID number is a frame identification number, and the number following “-” is a sub-number of a plurality of frames. Conventionally, when the transmitted information fits in one frame, it is transmitted as one frame data with only an ID number. If it does not fit in one frame, multiple frames with sub-numbers following the ID number are sequentially ordered. Processing to send was performed.

  In general, information transmitted in the downlink is character or graphic data, and therefore often does not fit in one frame and is a plurality of frames, but in this embodiment, a method of actively dividing is used. In FIG. 4, for example, data with ID = 21 is character data.

  In the figure, (b) is an example of a commercial information transmission cycle showing an example of the present embodiment. In order to allow only a vehicle moving at low speed to receive data, ID = 21 data is distributed at equal intervals, and all Controls the time to collect frames.

  In the figure, (c) is an example of a commercial information transmission cycle showing another example of the present embodiment. It is a process to transmit to make it possible to receive only the vehicle moving at low speed, but by arranging the data of ID = 21 in the second half of the transmission cycle, it seems that all data is collected as in (b) The collection time is controlled. Next, transmission cycle processing will be described.

  FIG. 5 is a flowchart showing a flow of downlink transmission cycle processing in the present embodiment. When the road unit control unit 8 starts the transmission cycle process (step S100, hereinafter, step is omitted and referred to as S100), the vehicle passing time set value recorded in the memory unit 12 is read by the external personal computer PC14 (S102). ). For example, in the present embodiment, the speed is 2.74 s corresponding to 5 km / h, but it is not particularly limited.

  Next, the communication data amount stored in the memory unit 12 is calculated from the memory size, the communication amount is read (S104), and the number to be divided into a plurality of frames is determined (S106). In step S108, it is determined whether or not the communication data amount is a long sentence exceeding the preset number of data. If the sentence is a long sentence, the beam of the optical beacon signal is set to a wide area (S112). If it is not a long sentence, the beam of the shining beacon signal is narrowed to narrow the area where information is transmitted (S110).

  Next, a process of arranging data in the transmission buffer developed in the memory unit 12 according to the number of divisions determined in step S106 is performed. If the number of divisions = 1 (no division) in S114, it is arranged at the rear of the buffer and the apparent collection time is controlled (S116).

  Next, when the number of divisions is 2 or more and less than 3 (S118), they are arranged at the rear of the buffer at equal intervals (S120). Further, when the number of divisions is 4 or more (S122), data is arranged using the entire buffer at regular intervals (S124).

  Next, the buffer content in which the data is arranged is transmitted to the optical beacon in-vehicle device 200 by downlink (S126), and monitored from the in-vehicle device control unit 28 of the optical beacon in-vehicle device 200 via the navigation control unit 38 of the navigation device 300. A message is displayed at 42, and the process ends (S128). In this embodiment, the display on the monitor 42 is scroll-displayed in the upper and lower peripheral portions or a part of the display area of the monitor 42 display portion, and has a display format in consideration of visibility.

  In summary, the VICS road unit divides the data to be transmitted by the road unit control unit 8 in order to provide commercial information only to vehicles that are running or stopped at a low speed, and the transmission timing is also adjusted. By controlling, the data is transmitted to the light emitting / receiving unit 2 as data at long intervals. Even if a part of the information reaches a large number of unspecified vehicles in general traveling by this processing, all the frame IDs divided into a plurality of frames are not received, so unnecessary information is not displayed on the navigation device.

  In this embodiment, optical beacon VICS roadside equipment has been mainly described. However, radio wave beacon VICS roadside equipment also performs similar processing for low-speed or stopped vehicles passing through a limited service area. Needless to say, it can be done.

It is a whole block diagram which shows the whole structure of the optical beacon communication apparatus containing the optical beacon on-road machine in this embodiment, an optical beacon vehicle equipment, and a navigation apparatus. It is explanatory drawing which shows the service area of the optical beacon on-road machine in this embodiment. It is a data format figure which shows the structure of the data format in the downlink communication from the optical beacon roadside apparatus in this embodiment to an optical beacon vehicle equipment. It is explanatory drawing which showed the conventional transmission cycle and the transmission cycle in this embodiment. It is a flowchart figure which shows the flow of the downlink transmission cycle process in this embodiment.

Explanation of symbols

  22, 2a, 2b Light emitting / receiving unit, 4, 24 receiving unit, 6, 26 transmitting unit, 8 on-road unit control unit, 10 I / F unit, 12, 32, 36 memory unit, 14 PC, 28 in-vehicle unit control unit, 34 DVD / HDD drive, 38 navigation control unit, 40 remote control, 42 monitor, 44 antenna, 46 gyro, 48 ECU, 100 optical beacon on-road unit, 200 optical beacon on-board unit, 300 navigation device, 400 vehicle, 500 gate.

Claims (6)

In a VICS on-road machine that provides commercial information within a data communication area capable of data communication to a navigation device mounted on a vehicle,
A commercial information storage unit for obtaining and storing commercial information from the outside;
A transit time setting means for setting a transit time as a transit time;
Data conversion means for converting commercial information into transmittable VICS data based on the set transit time;
VICS data communication means for communicating the VICS data converted by the data conversion means to the navigation device;
Have
The VICS roadside machine characterized in that the data converting means divides the commercial information into a plurality of data and converts the information into VICS data dispersed within the transit time. In the VICS roadside machine according to claim 1,
The data conversion means arranges the commercial information in the latter half of the VICS data based on the transit time. In the VICS road vehicle according to claim 1 or 2,
The VICS data communication means comprises a communication area variable means for expanding or reducing the data communication area based on the information amount of the commercial information recording unit. In a VICS roadside machine communication method for providing commercial information in a data communication area capable of data communication to a navigation device mounted on a vehicle,
A commercial information storage process for obtaining and storing commercial information from outside;
A transit time setting process for setting the transit time as a transit time;
A data conversion step for converting commercial information into communicable VICS data based on the set transit time;
A VICS data communication step of transmitting the VICS data converted in the data conversion step to the navigation device;
Including
In the data conversion step, the commercial information is divided into a plurality of data and converted into VICS data distributed within the transit time. In the VICS roadside machine communication method according to claim 4,
The data conversion step arranges commercial information in the latter half of the VICS data based on the transit time. In the VICS on-road equipment communication method according to claim 4 or 5,
The VICS data communication step includes a communication region variable step of expanding or reducing the data communication region based on the information amount of the commercial information recording unit.

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