JP2009151671A - Information distribution system and in-vehicle equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To output, with a voice, only information about a lane in a direction in which a self-vehicle is traveling in an in-vehicle unit which provides information received from road side radio equipment with a voice. <P>SOLUTION: In an information distribution system, road side radio equipment 20B for providing information which transmits speech type provision information to an in-vehicle unit 10 is arranged in a lane L, and road side radio equipment 20A for notice is arranged in front of the road side radio equipment 20B in the traveling direction of the lane L. The road side radio equipment 20A and 20B are provided with road side ID whose numbers are increasing in this order, and configured to transmit the road side ID to the in-vehicle unit 10 which has entered the communication area of a DSRC. The in-vehicle 10 compares this time road side ID received by the communication part 14 with the previously received road side ID, and controls whether to output a voice based on the received speech type provision information by a voice output means based on the comparison result. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an information distribution system and an in-vehicle device.

  Conventionally, in-vehicle devices use DSRC (Dedicated Short Range Communication) to perform narrow area wireless communication with a roadside wireless device installed on a road, and receive voice information from the center device via the roadside wireless device. It is possible. In communication using DSRC, bidirectional communication between the vehicle-mounted device of the vehicle and the roadside wireless device is possible only while the vehicle is within the communication range of the roadside wireless device. During this time, the center device passes through the roadside wireless device, Various information such as traffic situation information and information in front of the lane to support safety, disaster point information, road freezing point information, curve information, and merge point information are distributed.

  Specifically, the roadside apparatus installed on the road in the up lane radiates DSRC radio waves and distributes information related to the up direction to the vehicle-mounted device mounted on the vehicle traveling in the up lane. The roadside apparatus installed on the road in the down lane radiates DSRC radio waves and distributes information related to the down direction to the vehicle-mounted device mounted on the vehicle traveling in the down lane.

  However, the emitted radio wave may be reflected on the vehicle, and the reflected radio wave may leak into the adjacent lane as it is. In this case, in an utterance type vehicle-mounted device that does not have a navigation function, it is impossible to determine whether the vehicle is traveling in the upward direction or the downward direction, so the vehicle traveling in the opposite lane May be received by mistake, and information regarding roads on the opposite lane may be output erroneously. For example, while traveling in an up lane, radio waves reflected from an adjacent down lane may be received, and information about the down lane may be output, which may confuse the driver.

Therefore, in communication using DSRC, a technique for preventing erroneous communication due to radio waves leaking to adjacent lanes has been proposed. For example, in Patent Document 1, a roadside radio device having a roadside antenna that forms a DSRC radio wave range Fref is installed on a toll lane of a toll road toll gate, and is emitted to the radio zone Fref on a general road adjacent to the toll lane. By installing a jamming antenna that forms a jamming radio wave range Fjam by a radio wave with a frequency fjam different from the radio wave to be received, and while receiving a radio wave with the frequency fjam, lock only to receive the radio wave with the frequency fjam. Thus, a technique for preventing communication related to toll payment with an in-vehicle device of a car traveling on a general road is described.
JP 2003-242544 A

  However, Japanese Patent Laid-Open No. 2004-26883 cannot cope with a receiving-side vehicle-mounted device without a function of receiving a plurality of radio waves having different frequencies. In addition, if the on-board device on the receiving side receives radio waves having a plurality of different frequencies, the reception of information is locked, and therefore information on the lane in the traveling direction may not be received.

  An object of the present invention is to enable sound output of only information about a lane in a direction in which the host vehicle is traveling in an in-vehicle device that provides information received from a roadside apparatus by voice.

In order to solve the above-mentioned problem, the invention described in claim 1
A plurality of roadside wireless devices installed on a road, radiating radio waves to a predetermined area on the road to form a communication area, and transmitting information to a vehicle that has entered the communication area; A vehicle-mounted device comprising a receiving means for receiving information by performing wireless communication with the roadside wireless device when entering the communication area, and an information distribution system comprising:
The plurality of roadside wireless devices include a roadside wireless device including a set of two roadside wireless devices arranged side by side along the lane running direction,
Each of the two roadside wireless devices constituting the set has a number for determining the order of arrangement of the two roadside wireless devices in the traveling direction of the lane, and the own device with respect to a vehicle that has entered the communication area. Send information including the number
The in-vehicle device is
Voice output means for outputting voice based on voice reading information received from the roadside apparatus;
Of the numbers received from the two roadside radio devices constituting the set by the receiving means, the first number received first and the second number received later are compared, and the comparison result is Based on the control means for controlling whether or not the voice output means outputs the voice based on the voice reading information received following the second number by the receiving means;
Is provided.

The invention according to claim 2 is the invention according to claim 1,
The two roadside wireless devices constituting the set include a roadside wireless device for providing information that transmits voice-reading information related to the lane toward a vehicle traveling in the lane, and a roadside wireless for providing information in the lane. It is composed of a roadside wireless device for notice arranged in front of the traveling direction of the device,
When the second number received by the receiving unit is a number indicating an arrangement order after the first number received by the receiving unit, the control unit of the on-vehicle device uses the receiving unit. The voice output means outputs a voice based on the voice reading information received following the second number.

The invention according to claim 3 is the invention according to claim 1,
The plurality of roadside wireless devices form a communication area by radiating radio waves to lanes whose running directions oppose each other,
When the second number received by the receiving unit is greater than the first number received by the receiving unit, the control unit of the vehicle-mounted device has the second number by the receiving unit. Subsequently, the voice output means outputs a voice based on the voice reading-out information relating to a predetermined one of the lanes whose driving directions are opposite to each other, and the second voice received by the receiving means When the number is less than the first number received by the receiving means, the voice based on the voice reading information relating to the other traveling direction received following the second number by the receiving means is The sound is output by sound output means.

The vehicle-mounted device of the invention according to claim 4 is:
Receives information including the number transmitted from the roadside radio apparatus that is arranged in a line along the traveling direction of the lane on the road and that has a number for determining the two arrangement order in the traveling direction of the lane. Receiving means for
Voice output means for outputting voice based on voice reading information received from the roadside apparatus;
Of the numbers received from the two roadside radio devices constituting the set by the receiving means, the first number received first and the second number received later are compared, and the comparison result is Based on the control means for controlling whether or not the voice output means outputs the voice based on the voice reading information received following the second number by the receiving means;
Is provided.

  ADVANTAGE OF THE INVENTION According to this invention, in the vehicle equipment which provides the information received from the roadside radio | wireless apparatus with a voice, only the information about the lane of the direction which the own vehicle is drive | working can be audio-outputted.

  Embodiments according to the present invention will be described below in detail with reference to the accompanying drawings. However, although the utterance type vehicle-mounted device is described in the embodiment, the scope of the invention is not limited to the illustrated example, and in an ITS (Intelligent Transport Systems) vehicle-mounted device that communicates with the vehicle-mounted device from the center device via the roadside wireless device. It is also applied to a vehicle-mounted device that is connected to a device having a navigation function and includes image information, text information, etc. in addition to voice information.

[First Embodiment]
First, the configuration of the first embodiment will be described.
FIG. 1 shows a system configuration of an information distribution system 100 in the first embodiment.
As shown in FIG. 1, the information distribution system 100 includes an on-vehicle device 10, a roadside radio device 20 </ b> A, a roadside radio device 20 </ b> B, and a center device 30 that are mounted on a vehicle C, and the center device 30 is configured as a roadside radio device 20 </ b> A. , 20B, various information such as utterance type provided information for supporting safe driving is delivered to the vehicle-mounted device 10 by voice.

  As the utterance type provided information, for example, traffic condition information ahead of the lane in which the vehicle-mounted device 10 is traveling, disaster point information, road freezing point information, curve information, merging point information and the like can be mentioned. Further, as other information, for example, information on the current position such as the latitude of the roadside apparatus and the municipal code can be cited.

  Hereinafter, each component apparatus will be described in detail.

(Center device 30)
The center device 30 stores various types of information including utterance-type provision information distributed to the vehicle-mounted device 10 and distributes the information to the vehicle-mounted device 10. As the center device 30, a control unit that performs distribution control, a communication unit that communicates with the roadside apparatuses 20A and 20B, a computer terminal that includes a storage unit that stores various types of information distributed to the vehicle-mounted device 10, and the like can be applied. .
Although only one center device 30 is shown in FIG. 1, there are a plurality of distribution companies that distribute information, including a distribution company that distributes local information, and the center device 30 is provided for each distribution company. is there.

(Roadside wireless devices 20A and 20B)
The roadside apparatuses 20A and 20B are installed on the road as a set of both apparatuses, and are connected to the center apparatus 30 via a communication network N such as an IP network dedicated to DSRC. The roadside apparatuses 20A and 20B and the vehicle-mounted device 10 of the vehicle C traveling on the road can perform wireless communication.

  Each of the roadside radio apparatuses 20A and 20B includes a main body apparatus 201 and an antenna 202 as shown in FIG. The roadside radio apparatuses 20A and 20B radiate DSRC radio waves having a limited reach distance from the antenna 202 installed on the side of the road or above the road, and form a communication area Z in the vicinity thereof. Bidirectional narrowband wireless communication is possible only with the vehicle-mounted device 10 of the vehicle C that has entered the communication area Z. Hereinafter, the narrow area wireless communication between the roadside apparatus 20A, 20B and the vehicle-mounted device 10 may be referred to as road-vehicle communication.

  DSRC is a communication method using a radio wave of 5.8 GHz band, and as shown in FIG. 2, the communication range is, for example, several meters to several tens of meters. Since the DSRC transmission output from the roadside apparatus 20A, 20B is set to the same level, the communication area Z formed by each of the roadside apparatuses 20A, 20B is almost constant regardless of the installation location. .

  The main body device 201 performs processing for mediating exchange of information between the vehicle-mounted device 10 and the center device 30. That is, the main body device 201 stores various types of information including utterance type provision information transmitted from the center device 30 in advance, and when the vehicle C enters the communication area Z, the vehicle mounted on the vehicle C is mounted on the vehicle. The device 10 communicates with the antenna 202 to distribute various information transmitted from the center device 30 to the vehicle-mounted device 10. As the main body device 201, a computer terminal including a control unit that performs information processing and communication control, a storage unit, and the like can be applied.

  FIG. 3 shows an arrangement example of the roadside apparatus 20A and the roadside apparatus 20B. As shown in FIG. 3, the roadside radio device 20A and the roadside radio device 20B are separated from each other in the communication direction Z in the lane L formed on the road with an interval where the communication areas Z do not overlap each other. They are arranged in the order of 20B and arranged as a set. The communication area Z of the roadside apparatus 20A and the roadside apparatus 20B is formed on the lane L. The roadside wireless device 20A and the roadside wireless device 20B each have a number for determining the arrangement order of the two roadside wireless devices in the traveling direction of the lane L, for example, a serial number that increases by +1 in the order of the roadside wireless devices 20A and 20B ( Hereinafter, the roadside wireless device 20A and the roadside wireless device 20B transmit the roadside ID to the vehicle-mounted device 10 mounted on the vehicle C that has entered the communication area Z. In this embodiment, it is assumed that “roadside ID = 1001” is assigned to the roadside apparatus 20A, and “roadside ID = 1002” is assigned to the roadside apparatus 20B.

  The roadside apparatus 20B is a roadside apparatus for providing information, and transmits a roadside ID to the vehicle-mounted device 10 mounted on the vehicle C traveling on the lane L and relates to the lane L transmitted from the center apparatus 30. Various information such as utterance type provided information is transmitted.

  FIG. 4 shows an example of the utterance type provided information that the roadside apparatus 20 </ b> B transmits to the vehicle-mounted device 10. As shown in FIG. 4, the utterance type provided information includes speech information such as TTS (Text to Speech) and other speech information D3 for outputting (speaking) speech to the vehicle-mounted device 10, Road type D1 (for example, 1: highway, 4: general national road, 6: main local road, etc.), direction code D2 (1: up, 2: down, 3: inward) for which utterance type provided information is provided Information on the lane to be provided for the utterance type provided information, such as “4: Outward turn,... 15: No information”.

  On the other hand, the roadside radio apparatus 20A is a roadside radio apparatus for notifying for notifying that there is a roadside radio apparatus 20B for providing information in front of the lane L (in the traveling direction of the vehicle C). The pre-assigned roadside ID, information on the current position, and the like are transmitted to the vehicle-mounted device 10 mounted on the vehicle C traveling on the lane L, but the utterance type provision information is not transmitted.

  Here, as described above, the roadside radio device 20A and the roadside radio device 20B radiate DSRC radio waves having a limited reach distance and are only in a bidirectional narrow area with the vehicle-mounted device 10 of the vehicle C in the communication area Z. Although wireless communication is performed, the radiated radio wave may be reflected on the vehicle C, and the reflected radio wave may leak into the lane that is adjacent to the lane L and goes in the opposite direction. Conversely, radio waves radiated to a vehicle traveling in the opposite lane may be reflected by the roadside wireless device installed in the opposite lane, and the reflected radio wave may leak into the lane L. For this reason, the in-vehicle device 10 may erroneously receive the utterance type provided information transmitted to the vehicle traveling in the opposite lane, and may erroneously utter information regarding the lane in the opposite direction. For example, while traveling on an upward lane on a general road, radio waves reflected from the down lane may be received, and information related to the down lane may be uttered, which may confuse the driver.

Therefore, in the information distribution system 100, as described above, serial numbers that increase in the order of the roadside wireless devices 20A and 20B are assigned, and the information providing system 100 is provided in front of the roadside wireless device 20B for providing information in the traveling direction of the lane L. A roadside radio device 20A for notice is arranged. As a result, the vehicle-mounted device 10 mounted on the vehicle L traveling in the lane L always receives the roadside ID and the utterance-type provision information related to the traveling lane from the roadside radio device 20B, and always carries out the roadside radio device 20A. The roadside ID having a smaller number than the roadside ID of the roadside apparatus 20B is received. On the other hand, if the information on the roadside radio devices 20A and 20B installed in the opposite lane is reflected and received by the vehicle-mounted device 10, the roadside is received before the roadside ID of the roadside radio device 20A for notice is received. Since the roadside ID and utterance type provision information of the wireless device 20B are received, the roadside ID decreases. Therefore, in the vehicle-mounted device 10, the received utterance type provided information is received by the vehicle C of the vehicle by the roadside ID transmitted from the roadside wireless device 20 </ b> A for notification and the roadside ID transmitted from the roadside wireless device 20 </ b> B for providing information. It can be determined whether or not the lane L is traveling.
The roadside equipment may be installed in a location where radio wave interference is unavoidable due to topography. In such a case, install a warning antenna in a location where radio wave interference does not occur. It is possible.

(In-vehicle device 10)
The vehicle-mounted device 10 is an utterance type vehicle-mounted device mounted on the vehicle C. The vehicle-mounted device 10 has a DSRC function for performing communication based on DSRC with the roadside wireless devices 20A and 20B, and the driver outputs the speech-type provided information distributed from the roadside wireless device side by road-to-vehicle communication. Provide various information to support safe driving.

  As shown in FIG. 5, the vehicle-mounted device 10 includes a control unit 11, a ROM 12, a RAM 13, a communication unit 14, a sound processing unit 15, a speaker 16, an operation unit 17, a storage device 18, and an I / O device 19. Each unit is connected via a bus 101. As shown in FIG. 5, the vehicle-mounted device 10 is not provided with a navigation function for specifying the vehicle position and traveling direction such as GPS (Global Positioning System).

  The control unit 11 is configured by a CPU (Central Processing Unit) and the like, reads a system program and various processing programs stored in a ROM (Read Only Memory) 12 and develops them in a RAM (Random Access Memory) 13. Each part of the vehicle-mounted device 10 is centrally controlled according to the program.

  The ROM 12 stores a system program corresponding to the vehicle-mounted device 10, various programs including an utterance control processing program that can be executed on the system program, data necessary for executing these programs, and the like. Various programs are stored in the ROM 12 in the form of computer-readable program codes, and the control unit 11 sequentially executes operations according to the program codes.

  The RAM 13 forms a work area that temporarily stores various programs, input or output data, parameters, and the like read from the ROM 12 in various processes that are executed and controlled by the control unit 11. Further, the RAM 13 has a previous reception path ID area for storing the road ID received via the communication unit 14 as the previous reception path ID.

  The communication unit 14 includes an antenna 14a and a DSRC module 14b that performs transmission and reception of data including the utterance type provision information with the roadside wireless devices 20A and 20B by bidirectional narrow-area wireless communication based on DSRC.

  When the DSRC module 14b reaches the communication area Z of the roadside wireless device such as the roadside wireless devices 20A and 20B, the DSRC module 14b receives the DSRC radio wave radiated from the roadside wireless device by the antenna 14a, and is based on the roadside wireless device and the DSRC. Perform communication connection processing. When communication with the roadside apparatus is established and various types of information including utterance type provision information are received, the received information is output to the control unit 11.

The speech processing unit 15 generates a synthesized speech signal based on speech reading information described in an intermediate language such as TTS. For example, the speech processing unit 15 analyzes speech reading information and generates parameters necessary for speech synthesis (speech segment, phoneme duration, pitch, amplitude time change pattern, etc.). Then, a voice waveform is synthesized using the generated parameters, and this synthesized voice signal is output to the speaker 16.
The speaker 16 outputs the synthesized voice signal input by the voice processing unit 15.

  The operation unit 17 includes various keys associated with various functions, and outputs an operation signal for the operated key to the control unit 11.

The storage device 18 is configured by a semiconductor non-volatile memory or the like, and stores various data including information such as utterance type provided information received by the communication unit 14 and setting information related to the vehicle-mounted device 10.
The I / O device 19 is an interface for connecting an external device to the vehicle-mounted device 10.

(Operation of Information Distribution System 100 in First Embodiment)
Hereinafter, the operation of the information distribution system 100 according to the first embodiment will be described.
When the vehicle C traveling in the lane L enters the communication area Z of the roadside wireless device 20A, the main body device 201 of the roadside wireless device 20A is bidirectionally narrowed with the vehicle-mounted device 10 mounted on the vehicle C via the antenna 202. The area wireless communication is performed, and the roadside ID assigned to the own device is transmitted to the vehicle-mounted device 10.
When the vehicle C traveling in the lane L enters the communication area Z of the roadside wireless device 20B, the main body device 201 of the roadside wireless device 20B is narrowly connected to the vehicle-mounted device 10 mounted on the vehicle C via the antenna 202. The wireless communication is performed, and the roadside ID assigned to the own device is transmitted to the vehicle-mounted device 10 via the antenna 202. Subsequently, the utterance type provision information related to the lane L transmitted from the center device 30 in advance is transmitted to the antenna 202. It transmits to onboard equipment 10 via.

  When the communication unit 14 starts bi-directional narrow-area wireless communication with the roadside apparatus 20A or 20B and receives a roadside ID, the in-vehicle device 10 executes the speech control process shown in FIG. Note that the reception information such as the roadside ID and the utterance type provision information received from the communication unit 14 is temporarily stored in the RAM 13.

  In FIG. 6, the flow of the speech control process performed by the onboard equipment 10 is shown. This processing is realized by software processing in cooperation with the control unit 11 and the speech control processing program stored in the ROM 12.

  First, the previous reception path side ID area of the RAM 13 is referred to, and it is determined whether or not the previous reception path side ID is stored (step S1). If it is determined that the previous reception roadside ID is not stored (step S1; NO), the roadside ID received this time is stored as the previous reception roadside ID in the previous reception roadside ID area of the RAM 13 (step S2). Ends.

  On the other hand, if it is determined that the previous reception path side ID is stored (step S1; YES), the previous reception path side ID stored in the previous reception path side ID area and the current reception received via the communication unit 14 are stored. The roadside ID is compared, and it is determined whether or not the current roadside ID number has increased by +1 compared to the previous roadside ID number. If it is determined that the current roadside ID number has not increased by +1 compared to the previous roadside ID number (step S3; NO), the process proceeds to step S6.

  On the other hand, when it is determined that the current roadside ID number has increased by +1 compared to the previous roadside ID number (step S3; YES), information received following the current roadside ID via the communication unit 14 It is determined whether or not utterance type provision information is included. If it is determined that the utterance type provision information is included (step S4; YES), the voice processing unit 15 performs based on the voice reading information included in the utterance type provision information received following the current roadside ID. A voice synthesis signal is generated and voice is output from the speaker 16 (step S5), and the process proceeds to step S6. If it is determined that the utterance type provision information is not included in the information received subsequent to the current roadside ID via the communication unit 14 (step S4; NO), the process proceeds to step S6.

  In step S6, the previous reception path side ID stored in the previous reception path ID area of the RAM 13 is reset (step S6), and this process ends.

Of the roadside IDs received from the set of roadside apparatus 20A or 20B, the previously received roadside ID (first number) is stored in the RAM 13 as the previous circuit side ID by the utterance control process, and later the roadside ID. When the (second number) is received, the previous circuit side ID (first number) is compared with the roadside ID (second number) received this time, and as a result of the comparison, the previous time previously received When the number of the roadside ID (second number) received later is increased by +1 compared to the number of the roadside ID (first number) of Control is performed so that sound based on the utterance type provided information is output by the sound output means including the sound processing unit 15 and the speaker 16. After the output of the received utterance type provided information, the information in the previous circuit side ID area is reset in preparation for the reception of the roadside ID from the next set of roadside apparatus 20A or 20B.
In the utterance control process, the number of the current roadside ID (second number) received later increases by +1 compared to the number of the previous roadside ID (first number) received earlier. If not, the voice output of the utterance type provision information is not performed, and the information in the previous circuit side ID area is reset in preparation for the reception of the roadside ID from the next set of roadside apparatus 20A or 20B. In addition, even if the number of the current roadside ID (second number) received later is increased by +1 compared to the previous roadside ID received earlier, it is received following the current roadside ID received later. If the utterance type information is not included in the information to be uttered, there is no information to be uttered, so the voice output is not performed, and in preparation for the reception of the roadside ID from the next set of roadside wireless devices 20A or 20B. Information on the roadside ID area is reset.

  As described above, according to the information distribution system 100 in the first embodiment, the roadside wireless device including the roadside wireless device 20A and the roadside wireless device 20B as a set is arranged in the lane L formed on the road. To do. The roadside apparatus 20B is an information providing roadside apparatus that transmits utterance-type provided information related to the lane L to the vehicle-mounted device 10, and the roadside apparatus 20A is on the near side of the roadside apparatus 20B in the traveling direction in the lane L. It is a roadside radio device for notice to be arranged. The roadside apparatus 20A and the roadside apparatus 20B have serial numbers (roadside IDs) that increase by +1 in the order of the roadside apparatuses 20A and 20B, and transmit the roadside ID to the vehicle-mounted device 10 that has entered the communication area Z. The vehicle-mounted device 10 compares the roadside ID received last time by the communication unit 14 with the roadside ID received this time, and the number of the current roadside ID increases by +1 compared to the number of the previous roadside ID. Then, the voice based on the utterance type provision information received following the current roadside ID is output by the voice output means including the voice processing unit 15 and the speaker 16.

  That is, the vehicle-mounted device 10 provides the utterance type regarding the traveling direction of the lane L when it receives the utterance type provision information from the roadside wireless device 20B after passing through the roadside radio device 20A for warning arranged in front of the traveling direction. It is determined that the information has been received, and a voice based on the received utterance type provided information is output.

  Accordingly, the vehicle-mounted device 10 can output only information about the lane in the direction in which the host vehicle is traveling.

[Second Embodiment]
Next, a second embodiment of the present invention will be described.
The information distribution system 100 according to the second embodiment is applicable to a case where the communication area Z includes lanes in both the upward direction and the downward direction, such as a general road with one lane on one side.

(Configuration of Second Embodiment)
First, the configuration will be described.
Since the configuration of the information distribution system 100 in the second embodiment is the same as that described with reference to FIG. 1 in the first embodiment, the description is incorporated.
Moreover, since the structure of each apparatus of the information delivery system 100 is substantially the same as 1st Embodiment, description is used and only a different part is demonstrated below.

  FIG. 7 shows an arrangement example of the roadside apparatus 20A and the roadside apparatus 20B in the second embodiment. As shown in FIG. 7, the roadside radio device 20A and the roadside radio device 20B are spaced apart from each other so that their communication areas Z do not overlap along the lanes in which the traveling directions face each other, for example, the up lane L1 and the down lane L2. Thus, the roadside wireless devices 20A and 20B are arranged as a set. The roadside apparatus 20A and the roadside apparatus 20B form a communication area Z on the up lane L1 and the down lane L2. In the roadside radio apparatus 20A and the roadside radio apparatus 20B, numbers for determining the arrangement order of the two roadside radio apparatuses in the traveling direction of the lanes L1 and L2, respectively, for example, consecutive numbers increasing by +1 in the order of the roadside radio apparatuses 20A and 20B. A number (roadside ID) is assigned in advance, and the roadside wireless device 20A and the roadside wireless device 20B transmit the roadside ID to the vehicle-mounted device 10 that has entered the communication area Z, respectively. In this embodiment, it is assumed that “roadside ID = 2001” is assigned to the roadside apparatus 20A, and “roadside ID = 2002” is assigned to the roadside apparatus 20B. That is, in the present embodiment, the arrangement order of the roadside radio devices 20A and 20B in the traveling direction of the up lane L1 is shown by the ascending order (increase) of the roadside ID numbers, and the roadside radio devices 20A and 20A in the running direction of the down lane L2 are shown. The arrangement order of 20B is indicated by the descending order (decrease) of the roadside ID numbers.

  The roadside apparatus 20A is a roadside apparatus that provides utterance type provision information (downstream utterance type provision information) regarding the down lane L2, utterance type provision information without distinction of the traveling direction, etc., and a vehicle that travels in the up lane L1. The roadside ID is transmitted to the vehicle-mounted device 10 mounted on C (referred to as C1) and the vehicle-mounted device 10 mounted on the vehicle C (referred to as C2) traveling on the descending lane L2, and then from the center device 30. Various information such as the transmitted utterance type provided information for downlink is transmitted. The utterance type provision information transmitted from the roadside apparatus 20A to the vehicle-mounted device 10 is the same as that shown in FIG. 4, but the utterance type provision information provided by the roadside apparatus 20A includes a down code as the direction code D2. “2” indicating “15” or “15” indicating that the traveling direction is not distinguished is included.

The roadside apparatus 20B is a roadside apparatus that provides utterance type provision information (upstream utterance type provision information) regarding the up lane L1, utterance type provision information without distinction of directions, and the like, and a vehicle C1 that travels in the up lane L1. The roadside ID is transmitted to the vehicle-mounted device 10 mounted on the vehicle and the vehicle-mounted device 10 mounted on the vehicle C2 traveling in the down lane L2, and then the utterance type provision information for uplink transmitted from the center device 30 is transmitted. Send various information. The utterance type provision information transmitted from the roadside apparatus 20B to the vehicle-mounted device 10 is the same as that shown in FIG. 4, but the utterance type provision information provided by the roadside apparatus 20B includes an up-link as the direction code D2. “1” indicating “1” or “15” indicating that the traveling direction is not distinguished is included.

  In other words, the roadside apparatus 20A includes a roadside apparatus 20B that provides the utterance side provision information for the upstream (in the traveling direction of the vehicle C1) to the vehicle-mounted device 10 of the vehicle C1 traveling in the up lane L1. It functions as a roadside radio device for a notice for notifying that. The roadside apparatus 20A functions as a roadside apparatus for providing information to the vehicle-mounted device 10 of the vehicle C2 traveling in the down lane L2.

  Further, the roadside apparatus 20B includes a roadside apparatus 20A that provides the utterance-side provision information for the downlink (in the traveling direction of the vehicle C2) to the vehicle-mounted device 10 of the vehicle C2 traveling in the down lane L2. It functions as a roadside radio device for a notice for notifying that. Further, the roadside apparatus 20B functions as a roadside apparatus for providing information to the vehicle-mounted device 10 of the vehicle C1 traveling in the up lane L1.

(Operation of Information Distribution System 100 in Second Embodiment)
Hereinafter, the operation of the information distribution system 100 according to the second embodiment will be described.
When the vehicle C1 traveling on the up lane L1 or the vehicle C2 traveling on the down lane L2 enters the communication area Z of the roadside apparatus 20A, the main body device 201 of the roadside apparatus 20A passes through the antenna 202 to the vehicle C1. Alternatively, two-way narrowband wireless communication is performed with the vehicle-mounted device 10 mounted on C2, and the roadside ID assigned to the device is transmitted to the vehicle-mounted device 10 via the antenna 202, and subsequently transmitted from the center device 30 in advance. The utterance type provision information and the like related to the downlink lane L2 is transmitted to the vehicle-mounted device 10 via the antenna 202.

  When the vehicle C1 traveling on the up lane L1 or the vehicle C2 traveling on the down lane L2 enters the communication area Z of the roadside apparatus 20B, the main body device 201 of the roadside apparatus 20B passes the antenna C1 via the antenna 202. Alternatively, bidirectional narrow-area wireless communication is performed with the vehicle-mounted device 10 mounted on the C2, and the roadside ID assigned to the own device is transmitted to the vehicle-mounted device 10, and then the upstream lane transmitted from the center device 30 in advance. The utterance type provided information related to L1 is transmitted to the vehicle-mounted device 10 via the antenna 202.

  When the communication unit 14 starts information on bidirectional narrow-area wireless communication with the roadside apparatus 20A or 20B in the communication unit 14 and receives the roadside ID, the on-vehicle device 10 performs an utterance control process (first embodiment) shown in FIG. In order to distinguish it from the form, utterance control processing B is executed). Information such as the roadside ID and utterance type provision information received from the communication unit 14 is temporarily stored in the RAM 13.

  FIG. 8 shows a flow of the speech control process B executed by the vehicle-mounted device 10 in the second embodiment. This process is realized by a software process in cooperation with the control unit 11 and the speech control process B program stored in the ROM 12.

  First, the previous reception path side ID area of the RAM 13 is referenced to determine whether or not the previous reception path side ID is stored. If it is determined that the previous reception path side ID is not stored (step S11; NO), this time The received roadside ID is stored in the previous reception roadside ID area of the RAM 13 as the previous reception roadside ID (step S12), and this process ends.

  On the other hand, if it is determined that the previous reception roadside ID is stored in the RAM 13 (step S11; YES), the previous reception roadside ID and the current roadside ID received this time via the communication unit 14 are compared. As a result of the comparison, when it is determined that the current roadside ID number has increased by +1 compared to the previous reception roadside ID number (step S13; +1 increase), reception is performed following the current roadside ID via the communication unit. It is determined whether or not utterance type provision information is included in the received information (direction code D2 is “1”) or the traveling direction is not distinguished (direction code D2 is “15”). If it is determined that the utterance type provision information that does not distinguish the direction for going up or the traveling direction is included (step S14; YES), the voice reading information included in the utterance type provision information received following the current roadside ID Based on this, a voice synthesis signal is generated by the voice processing unit 15 and voice is output from the speaker 16 (step S16), and the process proceeds to step S17. If it is determined that the received information does not include utterance-type provision information that does not distinguish between upstream and traveling directions (step S14; NO), the process proceeds to step S17.

  On the other hand, when it is determined that the current roadside ID number has decreased by -1 compared to the previous reception roadside ID number (step S13; -1 decreased), the current roadside ID is received via the communication unit 14. It is determined whether or not utterance type provision information is included in the received information (direction code D2 is “2”) or the traveling direction is not distinguished (direction code D2 is “15”). If it is determined that the utterance-type provision information that does not distinguish between the downlink or the direction is included (step S15; YES), it is based on the speech-to-speech information included in the utterance-type provision information received subsequent to the current roadside ID. Then, a voice synthesis signal is generated by the voice processing unit 15 and voice is output from the speaker 16 (step S16), and the process proceeds to step S17. When it is determined that the received information does not include utterance-type provision information that does not distinguish downlink or direction (step S15; NO), the process proceeds to step S17.

  On the other hand, when the current roadside ID number has neither increased by +1 nor decreased by −1 compared to the previous receiving roadside ID number (step S13; other than +1 increase, −1 decrease), the process proceeds to step S17.

  In step S17, the previous reception path side ID stored in the previous reception path ID area of the RAM 13 is reset (step S17), and this process ends.

  Of the roadside IDs received from the set of roadside apparatus 20A or 20B by the utterance control process B, the roadside ID (first number) received first is stored in the RAM 13 as the previous circuit side ID, and the roadside later When the ID (second number) is received, the previous circuit side ID (first number) is compared with the roadside ID (second number) received this time, and as a result of the comparison, it is received first. When the current roadside ID number (second number) received later is increased by +1 compared to the previous roadside ID number (first number), the information received following the current roadside ID Is controlled so that the voice based on the utterance type provided information that does not distinguish the traveling direction or the traveling direction is output by the voice output unit including the voice processing unit 15 and the speaker 16. If the current roadside ID number (second number) received later is less than the previous roadside ID number (first number) received earlier, the current roadside ID Subsequently, it is controlled so that the voice based on the utterance type providing information that is included in the received information and does not distinguish the traveling direction is output by the voice output unit including the voice processing unit 15 and the speaker 16. After the output of the received utterance type provided information, the information in the previous circuit side ID area is reset in preparation for the reception of the roadside ID from the next set of roadside apparatus 20A or 20B.

  In the utterance control process B, the number of the current roadside ID (second number) received later is increased by +1 compared to the number of the previous roadside ID (first number) received earlier. If neither -1 nor -1 is reduced, the speech output of the utterance type provided information is not performed, and the information in the previous circuit side ID area is reset in preparation for the reception of the roadside ID from the next set of roadside wireless devices 20A or 20B. The In addition, even if the number of the current roadside ID (second number) received later is increased by +1 compared to the previous roadside ID received earlier, it is received following the current roadside ID received later. If the utterance type information that does not distinguish the traveling direction or the traveling direction is not included in the information to be uttered, there is no information to be uttered, so no voice output is performed, and the next set of roadside radio devices 20A or 20B In preparation for receiving the roadside ID, the information in the previous circuit side ID area is reset. Similarly, even if the current roadside ID number (second number) received later is decreased by −1 compared to the previous roadside ID received earlier, the current roadside ID received later is continued. If the received information does not include utterance-type information that does not distinguish the traveling direction or the traveling direction, there is no information to be uttered, so no voice output is performed, and the next set of roadside devices 20A or 20B The information in the previous circuit side ID area is reset in preparation for the reception of the roadside ID from.

  As described above, according to the information distribution system 100 in the second embodiment, the roadside radio apparatus 20A and the roadside radio apparatus 20B that form a set include the roadside radio apparatus 20A along the traveling direction of the up lane L1. , 20B (in the order of the roadside radio devices 20B, 20A along the traveling direction of the down lane L2), and radiates radio waves to both the up lane L1 and the down lane L2 to form the communication area Z. . The roadside apparatus 20A and the roadside apparatus 20B have consecutive numbers (roadside IDs) that increase by +1 in the order of the roadside apparatuses 20A and 20B, and the roadside apparatus 20A passes the roadside ID to the vehicle-mounted device 10 that has entered the communication area Z. The roadside apparatus 20B transmits information such as the roadside ID and the uplink utterance type provision information to the vehicle-mounted device 10 that has entered the communication area Z. The vehicle-mounted device 10 compares the roadside ID received by the communication unit 14 with the previously received roadside ID, and when the roadside ID number is increased by +1 compared to the previous time, the on-vehicle device 10 provides the uplink utterance type provision information. Voice based on the downlink utterance type provided information when the roadside ID number is decreased by -1 compared to the previous time. 15 and a speaker 16 for output.

  Therefore, even when the vehicle-mounted device 10 receives information on the opposite lane in which the traveling direction is opposite, only the information on the lane in the direction in which the vehicle is traveling can be output by voice. In particular, when the road is narrow and the communication area Z includes both upward and downward lanes, such as a general road with one lane on one side, the roadside radio devices 20A and 20B are used for providing information about lanes in both directions. Since it can be used as, it is preferable.

  The descriptions in the first and second embodiments are examples of the information distribution system according to the present invention, and the present invention is not limited to this.

  For example, in the first embodiment, the arrangement order of the roadside radio apparatuses 20A and 20B in the traveling direction of the lane L given to the roadside radio apparatuses 20A and 20B arranged in the lane L is ascending order of the numbers. Although shown, it is not limited to this, For example, it is good also as showing by the descending order of a number. The number is not limited to the roadside ID as long as the arrangement order of the two roadside wireless devices in the traveling direction is known. Further, the set information may be included in the data so that the arrangement order between the plurality of sets of roadside apparatuses 20A and 20B can be understood. Further, although the determination is based on the continuous number, the numbering is not limited to the continuous number.

  Further, in the second embodiment, in the roadside radio apparatuses 20A and 20B, as examples of lanes in which the traveling directions oppose each other, an explanation is given using an up lane and a down lane. However, as the lanes in which the traveling directions oppose each other, , Inward and outward of the ring line, eastbound and westbound, northbound and southbound, etc. In the second embodiment, the arrangement order of the roadside radio apparatuses 20A and 20B in the traveling direction of the up lane L1 is shown in ascending order of the numbers, and the arrangement of the roadside radio apparatuses 20A and 20B in the running direction of the down lane L2 is shown. Although the order is shown by the descending order of the numbers, it is only necessary that one of the lanes in which the traveling directions face each other is in ascending order and the other is in descending order, and the present invention is not limited to this.

  In addition, the detailed configuration and detailed operation of the information distribution system in the above embodiment can be changed as appropriate without departing from the spirit of the present invention.

  In addition, the information distribution system in the above embodiment is preferably applied to an utterance type vehicle-mounted device that does not have means for determining latitude and longitude and a direction, but the on-vehicle device is not limited to the utterance type.

It is a figure which shows the whole structure of the information delivery system of embodiment which concerns on this invention. It is a figure for demonstrating the roadside radio | wireless apparatus and communication area of FIG. It is a figure for demonstrating arrangement | positioning of the roadside apparatus in the information delivery system of 1st Embodiment. It is a figure which shows the data structural example of the speech-type provision information transmitted to a vehicle equipment from a roadside apparatus. It is a block diagram which shows the functional structure of the onboard equipment of FIG. It is a flowchart which shows the speech control process performed by the control part of the onboard equipment of FIG. 5 in 1st Embodiment. It is a figure for demonstrating arrangement | positioning of the roadside apparatus in the information delivery system of 2nd Embodiment. It is a flowchart which shows the speech control process B performed by the control part of the onboard equipment of FIG. 5 in 2nd Embodiment.

Explanation of symbols

100 Information distribution system 10 Onboard equipment 11 Control part 12 ROM
13 RAM
14 Communication unit 14a Antenna 14b DSRC module 15 Audio processing unit 16 Speaker 17 Operation unit 18 Storage device 19 I / O device 20A Roadside radio device 20B Roadside radio device 201 Main body device 202 Antenna 30 Center device

Claims (4)

A plurality of roadside wireless devices installed on a road, radiating radio waves to a predetermined area on the road to form a communication area, and transmitting information to a vehicle that has entered the communication area; A vehicle-mounted device comprising a receiving means for receiving information by performing wireless communication with the roadside wireless device when entering the communication area, and an information distribution system comprising:
The plurality of roadside wireless devices include a roadside wireless device including a set of two roadside wireless devices arranged side by side along the lane running direction,
Each of the two roadside wireless devices constituting the set has a number for determining the order of arrangement of the two roadside wireless devices in the traveling direction of the lane, and the own device with respect to a vehicle that has entered the communication area. Send information including the number
The in-vehicle device is
Voice output means for outputting voice based on voice reading information received from the roadside apparatus;
Of the numbers received from the two roadside radio devices constituting the set by the receiving means, the first number received first and the second number received later are compared, and the comparison result is Based on the control means for controlling whether or not the voice output means outputs the voice based on the voice reading information received following the second number by the receiving means;
An information distribution system comprising: The two roadside wireless devices constituting the set include a roadside wireless device for providing information that transmits voice-reading information related to the lane toward a vehicle traveling in the lane, and a roadside wireless for providing information in the lane. It is composed of a roadside wireless device for notice arranged in front of the traveling direction of the device,
When the second number received by the receiving unit is a number indicating an arrangement order after the first number received by the receiving unit, the control unit of the on-vehicle device uses the receiving unit. The information distribution system according to claim 1, wherein the voice output unit outputs a voice based on the voice reading information received following the second number. The plurality of roadside wireless devices form a communication area by radiating radio waves to lanes whose running directions oppose each other,
When the second number received by the receiving unit is greater than the first number received by the receiving unit, the control unit of the vehicle-mounted device has the second number by the receiving unit. Subsequently, the voice output means outputs a voice based on the voice reading-out information relating to a predetermined one of the lanes whose driving directions are opposite to each other, and the second voice received by the receiving means When the number is less than the first number received by the receiving means, the voice based on the voice reading information relating to the other traveling direction received following the second number by the receiving means is The information distribution system according to claim 1, wherein the information is output by a voice output unit. Receives information including the number transmitted from the roadside radio apparatus that is arranged in a line along the traveling direction of the lane on the road and that has a number for determining the two arrangement order in the traveling direction of the lane. Receiving means for
Voice output means for outputting voice based on voice reading information received from the roadside apparatus;
Of the numbers received from the two roadside radio devices constituting the set by the receiving means, the first number received first and the second number received later are compared, and the comparison result is Based on the control means for controlling whether or not the voice output means outputs the voice based on the voice reading information received following the second number by the receiving means;
On-vehicle device equipped with.

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