JP6369938B2 - In-vehicle communication device and in-vehicle device for optical beacon - Google Patents

Description

  The present invention relates to an in-vehicle communication device for an optical beacon and an in-vehicle device, and more particularly to an in-vehicle communication device for an optical beacon and an in-vehicle device that receive an infrared signal from a roadside communication device for an optical beacon.

  Japanese Patent Application Laid-Open No. 11-289357 (Patent Document 1) describes a received data processing method in which data received from an optical beacon roadside communication device is stored in an external storage device by a DMA (direct memory access) method. In this received data processing method, the received data processing unit detects a short frame, an overframe or a CRC error when detecting a frame end synchronization flag and also detects an abort pattern of received data during data reception. Then, it is determined that the received data is in an abnormal state, and abnormality detection is sent to the DMA control unit. The DMA control unit performs an initialization process to restore the circuit to an initial state without generating an interrupt to an external CPU (Central Processing Unit). Therefore, according to this configuration, when the above abnormal state that occurs due to the corruption of the received data due to noise is detected, the interrupt of the external CPU that has conventionally occurred is not generated, so the interrupt load on the external CPU can be reduced. Is possible.

JP-A-11-289357

  In the received data processing method described in Patent Document 1, information received from an optical beacon roadside communication device is stored in an external storage device by a configuration using a DMA technique. There is a need for an in-vehicle optical beacon communication device that transfers information received from an optical beacon roadside communication device to, for example, a navigation device with a smaller and lower cost configuration than the technology described in Patent Document 1. Yes.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to appropriately transfer provided information received from an optical beacon roadside communication device to a navigation device with a smaller and lower cost configuration. It is providing the vehicle-mounted communication apparatus for optical beacons and a vehicle-mounted apparatus which can do.

  (1) In order to solve the above-described problem, an in-vehicle optical beacon communication device according to an aspect of the present invention includes a receiving unit that receives an infrared signal from an optical beacon roadside communication device, and the above-described receiving unit that receives the infrared signal. A transfer unit that acquires the provision information included in the infrared signal and transfers the information to the navigation device, and the transfer unit is information transmitted from the same optical beacon roadside communication device among the provision information. Restrict transfer of type information to the navigation device.

  (8) In order to solve the above problems, an in-vehicle device according to an aspect of the present invention includes an in-vehicle communication device for optical beacons and a navigation device, and the in-vehicle communication device for optical beacons includes roadside communication for optical beacons. A receiving unit that receives an infrared signal from a machine, and a transfer unit that acquires provided information included in the infrared signal received by the receiving unit and transfers the provided information to the navigation device, the transferring unit including the provided information Among them, the information transmitted from the same optical beacon roadside communication device and the same type of information is restricted from being transferred to the navigation device.

  The present invention can be realized not only as an in-vehicle communication device for an optical beacon or an in-vehicle device provided with such a characteristic processing unit, but also as a transfer method having such characteristic processing as a step, or such a step. Can be realized as a program for causing a computer to execute. Moreover, it is realizable as a semiconductor integrated circuit which implement | achieves part or all of the vehicle-mounted communication apparatus for optical beacons or a vehicle-mounted apparatus, or can be implement | achieved as a system provided with the vehicle-mounted communication apparatus for optical beacons or a vehicle-mounted apparatus.

  ADVANTAGE OF THE INVENTION According to this invention, the provision information received from the roadside communication apparatus for optical beacons can be appropriately transferred to a navigation apparatus with a smaller and lower-cost configuration.

FIG. 1 is a diagram showing an image of an infrared transmission system according to an embodiment of the present invention viewed from the side. FIG. 2 is a diagram showing an image of the infrared transmission system according to the embodiment of the present invention as viewed from above. FIG. 3 is a diagram showing a configuration of the infrared transmission system according to the embodiment of the present invention. FIG. 4 is a diagram illustrating an example of a period during which the in-vehicle communication device for optical beacons can receive an infrared signal in the infrared transmission system according to the embodiment of the present invention. FIG. 5 is a diagram showing an example of a frame exchanged between the optical beacon roadside communication device and the optical beacon vehicle-mounted communication device according to the embodiment of the present invention. FIG. 6 is a diagram illustrating an example of the contents of a frame that can be normally received by the in-vehicle optical beacon communication device according to the embodiment of the present invention. FIG. 7 is a diagram showing the configuration of the in-vehicle communication device for optical beacons in the infrared transmission system according to the embodiment of the present invention. FIG. 8 is a diagram showing the configuration of the FPGA in the in-vehicle communication device for optical beacons according to the embodiment of the present invention. FIG. 9 is a diagram showing the configuration of the gate section in the FPGA according to the embodiment of the present invention. FIG. 10 is a diagram showing a configuration of the header information processing unit in the provided information processing unit according to the embodiment of the present invention. FIG. 11 is a diagram showing a configuration of the transfer restriction unit in the gate unit according to the embodiment of the present invention. FIG. 12 is a diagram showing a configuration of the transfer determination unit in the transfer restriction unit according to the embodiment of the present invention. FIG. 13: is the flowchart which defined the operation | movement procedure at the time of restrict | providing the provision information which the vehicle-mounted communication apparatus for optical beacons which concerns on embodiment of this invention transfers to a navigation apparatus. FIG. 14 is a flowchart that defines an operation procedure when the in-vehicle optical beacon communication device according to the embodiment of the present invention performs a provider determination process. FIG. 15 is a flowchart defining an operation procedure when the optical beacon in-vehicle communication device according to the embodiment of the present invention performs the transfer restriction process. FIG. 16 is a flowchart that defines an operation procedure when the in-vehicle optical beacon communication device according to the embodiment of the present invention performs a single frame acquisition process. FIG. 17 is a flowchart defining an operation procedure when the optical beacon in-vehicle communication device according to the embodiment of the present invention performs a frame group acquisition process.

  First, the contents of the embodiment of the present invention will be listed and described.

  (1) The vehicle-mounted communication device for optical beacons according to the embodiment of the present invention includes a receiving unit that receives an infrared signal from an optical beacon roadside communication device, and provided information included in the infrared signal received by the receiving unit. A transfer unit that acquires and transfers the information to the navigation device, and the transfer unit is the information transmitted from the same optical beacon roadside communication device of the provided information, and the navigation device of the same type of information Restrict forwarding to

  With such a configuration, in the provided information received from the same optical beacon roadside communication device, it is possible to prevent the provision information having the same content from being repeatedly transferred to the navigation device, so the data amount of the provided information to be transferred to the navigation device Can be reduced.

  As a result, for example, in an in-vehicle optical beacon communication device, the amount of data received per unit time from the optical beacon roadside communication device is larger than the amount of data transmitted per unit time to the navigation device, and the provision information is temporarily Even when a buffer for holding the information is necessary, it is possible to appropriately transfer the provided information to the navigation device using a small-capacity buffer. That is, the provided information received from the optical beacon roadside communication device can be appropriately transferred to the navigation device with a smaller and lower-cost configuration.

  (2) Preferably, the provision information is divided into a plurality of frames and transmitted from the optical beacon roadside communication device, and the transfer unit performs the acquisition of the plurality of frames when the acquisition of the plurality of frames is completed. Transfer to the navigation device is started.

  As described above, after the entire provision information included in a plurality of frames is acquired, transfer of the provision information to the navigation device is started, so that a division portion of the provision information is transferred to the navigation device in units of frames. Therefore, it is not necessary to manage whether or not the provided information divided into a plurality of frames is transferred to the navigation device with a simple process.

  (3) More preferably, when the transfer unit acquires the first frame of the plurality of frames, the transfer unit starts holding the provision information included in the plurality of frames, and acquires the plurality of frames. When completed, transfer of the provided information including the held information to the navigation device is started.

  As described above, when the first frame of the plurality of frames is acquired, the provision information acquisition process can be simplified by the configuration in which the holding of the provided information divided into the plurality of frames is started. Therefore, it is possible to limit the transfer of the provided information divided into a plurality of frames to the navigation device with simpler processing.

  (4) Preferably, the transfer unit has the same provision information included in the infrared signal received by the receiving unit based on whether or not the infrared signal is not received by the receiving unit for a predetermined time or more. It is determined whether the provided information is received from the optical beacon roadside communication device.

  With such a configuration, it is possible to determine by simple processing whether the provision information included in the infrared signal is provision information received from the same optical beacon roadside communication device.

  (5) Preferably, the provision information included in the infrared signal includes an identifier of the optical beacon roadside communication device that has transmitted the infrared signal, and the transfer unit is configured to receive the reception unit based on the identifier. It is determined whether or not the provision information included in the infrared signal received by the communication information is the provision information received from the same optical beacon roadside communication device.

  With such a configuration, it is possible to more reliably determine whether the provision information included in the infrared signal is provision information received from the same optical beacon roadside communication device.

  (6) Preferably, when the reception unit starts receiving the infrared signal from the new optical beacon roadside communication device, the transfer unit restricts transfer of the provided information to the navigation device. To the unrestricted state.

  Thus, every time the roadside communication device for the optical beacon that is the transmission source of the provided information is switched, the configuration for returning the restricted state of the transfer of the provided information to the navigation device to the unrestricted state, the optical beacon before switching It is possible to avoid a situation in which provision information of the same type as the provision information transmitted from the roadside communication device is not transferred from the roadside communication device for optical beacons after switching to the navigation device.

  (7) Preferably, the transfer unit targets information of a type set by the navigation device among the provided information included in the infrared signal.

  In this way, even when a buffer for temporarily holding provided information is necessary due to the configuration that is limited to the type of information required by the navigation device, a buffer with a smaller capacity is used. The provided information can be appropriately transferred to the navigation device.

  (8) An in-vehicle device according to an embodiment of the present invention includes an in-vehicle communication device for optical beacons and a navigation device, and the in-vehicle communication device for optical beacons receives an infrared signal from a roadside communication device for optical beacons. A receiving unit; and a transfer unit that acquires the provision information included in the infrared signal received by the reception unit and transfers the information to the navigation device. The transfer unit includes the same optical beacon in the provision information. Transfer of the same type of information transmitted from the roadside communication device to the navigation device is restricted.

  With such a configuration, in the provided information received from the same optical beacon roadside communication device, it is possible to prevent the provision information having the same content from being repeatedly transferred to the navigation device, so the data amount of the provided information to be transferred to the navigation device Can be reduced.

  As a result, for example, in an in-vehicle optical beacon communication device, the amount of data received per unit time from the optical beacon roadside communication device is larger than the amount of data transmitted per unit time to the navigation device, and the provision information is temporarily Even when a buffer for holding the information is necessary, it is possible to appropriately transfer the provided information to the navigation device using a small-capacity buffer. That is, the provided information received from the optical beacon roadside communication device can be appropriately transferred to the navigation device with a smaller and lower-cost configuration.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated. Moreover, you may combine arbitrarily at least one part of embodiment described below.

  FIG. 1 is a diagram showing an image of an infrared transmission system according to an embodiment of the present invention viewed from the side. FIG. 2 is a diagram showing an image of the infrared transmission system according to the embodiment of the present invention as viewed from above. FIG. 3 is a diagram showing a configuration of the infrared transmission system according to the embodiment of the present invention.

  With reference to FIGS. 1 to 3, the infrared transmission system 201 includes an optical beacon roadside communication device 151 and an in-vehicle device 102. The in-vehicle device 102 includes an optical beacon in-vehicle communication device 101 and a navigation device 171. The optical beacon roadside communication device 151 includes a light projecting / receiving unit 1.

  For example, the optical beacon in-vehicle communication device 101 and the navigation device 171 may be configured to be accommodated in one casing or may be configured to be accommodated in separate casings.

  As shown in FIG. 2, the road Rd1 is provided with a travel lane CL1 and an adjacent lane NL1 adjacent to the travel lane CL1 across the lane mark LM1. A travel direction Dc, which is a direction in which the automobile 11 should travel, is defined in the travel lane CL1.

  The optical beacon roadside communication device 151 is provided above the road Rd1 via a support column P1 installed in the vicinity of the road Rd1, for example. More specifically, the light projecting / receiving unit 1 in the optical beacon roadside communication device 151 emits infrared rays and receives infrared rays, for example. The light projecting / receiving unit 1 is provided at a height of, for example, 5.5 meters from the road surface of the road Rd1.

  The optical beacon roadside communication device 151 irradiates, that is, transmits an infrared signal including provision information to be provided to the navigation device 171 to the predetermined spaces Sir1 and Sir2 via the light projecting / receiving unit 1. The information included in the infrared signal includes, for example, the identifier of the optical beacon roadside communication device 151 that has transmitted the infrared signal. Specifically, the provided information includes ID information that is an identifier of the optical beacon roadside communication device 151 that has transmitted the provided information.

  The optical beacon roadside communication device 151 repeatedly transmits the provided information, for example, at a cycle of 80 milliseconds. Also, different provided information is transmitted from different optical beacon roadside communication devices 151, for example.

  Here, the predetermined space Sir1 is defined as follows, for example. That is, the predetermined space Sir1 has a bottom surface Bir1 and a top surface Uir1. The bottom surface Bir1 and the top surface Uir1 are located at heights of 1.0 meter and 1.5 meters, respectively, from the road surface of the road Rd1.

  The bottom Bir1 has, for example, 3.5 meters as the length in the width direction of the road Rd1, and from the position 0.70 meters away from the position vertically below the light projecting / receiving unit 1 in the direction opposite to the traveling direction Dc. It has a length of 2.70 meters in the opposite direction. Further, the upper surface Air1 has, for example, a length of 3.1 meters in the width direction of the road Rd1, and a position of 0.63 meters in the opposite direction of the traveling direction Dc from a position vertically below the light projecting / receiving unit 1 And 2.40 meters in the opposite direction.

  The predetermined space Sir2 is defined as follows, for example. That is, the predetermined space Sir2 has a bottom surface Bir2 and a top surface Uir2. The bottom surface Bir2 and the top surface Uir2 are located at a height of 1.0 meter and 1.5 meters from the road surface of the road Rd1, respectively.

  The bottom Bir2 has, for example, 3.5 meters as the length in the width direction of the road Rd1, and from the position vertically below the light projecting / receiving unit 1 to the opposite direction of the traveling direction Dc from the position of 3.40 meters. It has a length of 2.64 meters in the opposite direction. The upper surface Uir2 has, for example, a length of 3.1 meters in the width direction of the road Rd1, and a position of 3.03 meters in the opposite direction of the traveling direction Dc from the position vertically below the light projecting / receiving unit 1 And 2.34 meters in the opposite direction.

  Therefore, the predetermined spaces Sir1 and Sir2 are adjacent to each other in the order of the predetermined spaces Sir1 and Sir2 along the opposite direction.

  The optical beacon in-vehicle communication device 101 and the navigation device 171 are provided in the automobile 11, for example. More specifically, the optical beacon vehicle-mounted communication device 101 is provided, for example, below the windshield of the automobile 11 and at a height of 1.0 to 1.5 meters from the road surface of the road Rd1.

  For example, when the automobile 11 travels along the traveling direction Dc at the speed v along the traveling lane CL1, while the optical beacon in-vehicle communication device 101 passes through the predetermined space Sir1, Sir2, the optical beacon in-vehicle communication device 101 is An infrared signal is received from the optical beacon roadside communication device 151, that is, received. For example, the optical beacon in-vehicle communication device 101 transfers the provided information included in the received infrared signal to the navigation device 171.

  For example, when the navigation apparatus 171 receives the provision information from the optical beacon in-vehicle communication device 101, the navigation apparatus 171 provides the received provision information to a person in the automobile 11. The navigation device 171 generates transmission information that is information to be transmitted to the optical beacon roadside communication device 151, and transmits the generated transmission information to the optical beacon in-vehicle communication device 101.

  For example, when receiving the transmission information from the navigation device 171, the optical beacon in-vehicle communication device 101 transmits an infrared signal including the received transmission information. The optical beacon roadside communication device 151 can receive an infrared signal transmitted while the optical beacon in-vehicle communication device 101 passes through the predetermined space Sir2.

  FIG. 4 is a diagram illustrating an example of a period during which the in-vehicle communication device for optical beacons can receive an infrared signal in the infrared transmission system according to the embodiment of the present invention.

  Referring to FIG. 4, a plurality of optical beacon roadside communication devices 151 are provided, for example, along traveling direction Dc. The optical beacon roadside communication device 151 is provided at an interval of at least 500 meters, for example.

  Therefore, for example, when the automobile 11 travels on the travel lane CL1 at a speed of 70 kilometers per hour, the in-vehicle beacon communication device 101 for optical beacons can receive an infrared signal at a period of at least 26 seconds.

  Specifically, for example, optical beacon roadside communication devices 151A, 151B, and 151C, which are optical beacon roadside communication devices 151, are sequentially provided at intervals of 500 meters along the traveling direction Dc. Hereinafter, each of the optical beacon roadside communication devices 151A, 151B, and 151C is also referred to as an optical beacon roadside communication device 151.

  In this case, when the automobile 11 travels on the traveling lane CL1 at a speed of 70 kilometers per hour, the reception periods P1, P2, and P3 in which the optical beacon in-vehicle communication device 101 can receive an infrared signal are as follows.

  That is, the optical beacon in-vehicle communication device 101 can receive an infrared signal from the optical beacon roadside communication device 151A in the reception period P1 of 259 milliseconds from the time t1 to the time t2, and the time t2 when the reception period P1 expires. No infrared signal is received until time t3 when 25.741 seconds elapse.

  The optical beacon in-vehicle communication device 101 can receive the infrared signal from the optical beacon roadside communication device 151B in the reception period P2 of 259 milliseconds from the time t3 to the time t4, and the time t4 when the reception period P2 expires. No infrared signal is received until time t5 when 25.741 seconds elapse.

  The optical beacon in-vehicle communication device 101 can receive an infrared signal from the optical beacon roadside communication device 151C in the reception period P3 of 259 milliseconds from time t5 to time t6.

  As described above, since the optical beacon roadside communication device 151 repeatedly transmits the provision information at a cycle of 80 milliseconds, the optical beacon in-vehicle communication device 101 provides the same in each of the reception periods P1, P2, and P3. It is possible to receive information multiple times.

[Frame structure]
FIG. 5 is a diagram showing an example of a frame exchanged between the optical beacon roadside communication device and the optical beacon vehicle-mounted communication device according to the embodiment of the present invention.

  Referring to FIG. 5, a frame 401 is composed of, for example, a first synchronization area, a header area, a real data area, an idle area, a CRC area, and a second synchronization area in the order of transmission.

  The first synchronization area has a size of 1 byte, for example, and stores a value of 7EH. Hereinafter, a number ending with “H” means that the number before “H” is expressed in hexadecimal.

  For example, when the frame 401 is used in a downlink transmitted from the optical beacon roadside communication device 151 to the optical beacon in-vehicle communication device 101, the header area has a size of 5 bytes. When used in the uplink transmitted from the beacon in-vehicle communication device 101 to the optical beacon roadside communication device 151, it has a size of 10 bytes. In the header area, header information representing the contents of the frame 401 is stored.

  For example, when the frame 401 is used in the downlink, the actual data area has a size of 123 bytes. When the frame 401 is used in the uplink, the actual data area has a size of 59 bytes at the maximum. In the actual data area, actual data information defined by each application is stored. Information included in the header area and the actual data area corresponds to provided information, for example.

  The idle area has a size of 1 byte, for example, and stores the value of AAH. The CRC area has a size of 2 bytes, for example, and stores CRC information for testing errors in values stored in the header area, the actual data area, and the idle area. The second synchronization area has a size of 1 byte, for example, and stores a value of 7EH.

  FIG. 6 is a diagram illustrating an example of the contents of a frame that can be normally received by the in-vehicle optical beacon communication device according to the embodiment of the present invention.

  In FIG. 6, for example, in the frame 401 of the first to 17th frames that can be normally received by the optical beacon in-vehicle communication device 101, the first byte area to the ninth byte area from the top of the header area is stored. The value to be obtained is shown in hexadecimal. Hereinafter, the n-th byte area from the beginning of the header area is also referred to as the first n-th byte.

  Since the frame 401 shown in FIG. 6 is a frame used in the downlink, the first 1st to 5th bytes correspond to the header area. The area from the first 6 bytes to the first 128 bytes corresponds to the actual data area.

  In the first byte, a value indicating the type of information included in the corresponding frame 401 (hereinafter also referred to as a type value) is stored. Specifically, in the case illustrated in FIG. 6, four types of information “1e”, “1b”, “02”, and “01” are transmitted from the optical beacon roadside communication device 151.

  The provided information may be divided into a plurality of frames 401 and transmitted from the optical beacon roadside communication device 151, for example. More specifically, for example, the same type of information may be divided into a plurality of pieces and transmitted from the optical beacon roadside communication device 151 by the plurality of frames 401 (hereinafter also referred to as a frame group 402).

  Specifically, the information corresponding to the type values of “02” and “1b” is divided into three and transmitted from the optical beacon roadside communication device 151 by three frames 401. This is because data indicating information corresponding to the type values “02” and “1b” is too large to be stored in, for example, one frame 401. Information corresponding to the type values “01” and “1e” is transmitted from the optical beacon roadside communication device 151 by a single frame 401.

  Each frame 401 in the frame group 402 can be identified based on the value of the first 4 bytes (hereinafter also referred to as a frame number).

  Here, the lower 7 bits of the frame number indicate the order of the frames 401 in the frame group 402, for example. More specifically, for example, the information divided into a plurality of pieces is stored from the top in the order of the lower 7 bits of the frame number in the plurality of frames 401, that is, the frame group 402. Therefore, for example, the continuation of the information in which the lower 7-bit value of the frame number is stored in the frame 401 is stored in the frame 401 whose lower 7-bit value of the frame number is (A + 1).

  Hereinafter, in the frame group 402, frames 401 whose lower 7 bits of the frame number are 1H, 2H, and 3H are also referred to as a first frame 501, a second frame 502, and a third frame 503, respectively.

  Further, the value of the upper 1 bit of the frame number indicates, for example, whether or not it is the last frame. Here, the last frame is a frame 401 that includes information at the end of information divided into a plurality of pieces. Specifically, for example, when the information included in the frame 401 whose lower 7 bits of the frame number is (A + 1) is the last information, there is no continuation of the information, that is, the order of the frame 401 is When it is the last, the frame 401 is the last frame.

  When the frame 401 is the last frame, the value of the upper 1 bit of the frame number in the frame 401 is 1H. When the frame 401 is not the final frame, the value of the upper 1 bit of the frame number in the frame 401 is 0H.

  Specifically, for example, in the frame 401 including “1b” or “02” as the type value, the continuation of the information included in the first frame 501 having the frame number value 01H is the frame number value 02H. It is included in a certain second frame 502. Further, the continuation of the information included in the second frame 502 is included in the third frame 503 which is the final frame having a frame number value of 83H.

  For example, the same content is included in the frame 401 in which the type value and the frame number match.

  As described above, the optical beacon roadside communication device 151 repeatedly transmits the provided information at a cycle of 80 milliseconds, but transmits, for example, the same content frame 401 a plurality of times within one cycle.

  For example, as shown in FIG. 6, the in-vehicle communication device for optical beacon 101 has 1, 2, 4, 5, 8, 16th frame, 15, 17th frame, 3, 14th frame, 6, 9th frame, In the seventh and eleventh and eleventh frames, the same frame 401 is received.

  Further, the optical beacon roadside communication device 151 divides information into a plurality of pieces, and when the divided pieces of information are transmitted by the plurality of frames 401, for example, the frames 401 are continuously transmitted in the order of frame numbers.

  Specifically, for example, the optical beacon roadside communication device 151 divides the information corresponding to the type value “1b” or “02” into three, and divides the divided information into three frames 401, that is, the first frame 501, When transmitting by the 2nd frame 502 and the 3rd frame 503, it transmits continuously in order of the 1st frame 501, the 2nd frame 502, and the 3rd frame 503.

  For example, as shown in FIG. 6, the optical beacon vehicle-mounted communication device 101 normally receives a frame 401 including “1b” as a type value in, for example, the third frame and the 12th to 14th frames.

  More specifically, the in-vehicle optical beacon communication device 101 normally receives the third frame 503 including “1b” as the type value in the third frame. Further, the in-vehicle optical beacon communication device 101 normally receives the first frame 501, the second frame 502, and the third frame 503 that include “1b” as the type value in the 12th, 13th, and 14th frames. To do.

  For example, after the frame 401 having the type value “1e” is normally received in the second frame, only the third frame 503 having the type value “1b” is normally received in the third frame. This is because the in-vehicle communication device 101 for the vehicle fails to receive the first frame 501 and the second frame 502.

  Further, for example, as shown in FIG. 6, the in-vehicle communication device for optical beacon 101 correctly sets the frame 401 including “02” as the type value in, for example, the sixth frame, the seventh frame, and the ninth to eleventh frames. Receive.

  More specifically, the in-vehicle optical beacon communication device 101 normally receives the first frame 501 and the third frame 503 including “02” as the type value in the sixth and seventh frames, respectively. In addition, the optical beacon in-vehicle communication device 101 normally receives the first frame 501, the second frame 502, and the third frame 503 including “02” as the type value in the ninth frame, the tenth frame, and the eleventh frame, respectively. To do.

  After the frame 401 having the classification value “1e” is normally received in the fifth frame, the first frame 501 and the third frame 503 including “02” as the classification value are normally received in the sixth and seventh frames. This is because, for example, the optical beacon vehicle-mounted communication device 101 failed to receive the second frame 502.

  For example, among the frames 401 corresponding to the four type values “01”, “02”, “1b”, and “1e”, the first frame 501 corresponding to the type value “02” The ID information of the optical beacon roadside communication device 151 that has transmitted an infrared signal including one frame 501 is included.

  More specifically, the ID information is stored in the first 6 bytes to the 8th bytes in the first frame 501 corresponding to the type value “02”. Specifically, for example, 471006H, which is a value stored in the first 6th to 8th bytes in the first frame 501 of the sixth and ninth frames shown in FIG. 6, is the ID information.

[Task]
For example, in communication between the optical beacon roadside communication device 151 and the optical beacon in-vehicle communication device 101, the downlink and uplink communication speeds are 1 Mbps (bits per second) and 256 kbps, respectively.

  On the other hand, for example, in the communication between the optical beacon in-vehicle communication device 101 and the navigation device 171, the communication speed is 38.4 kbps. For this reason, in the optical beacon in-vehicle communication device 101, the amount of data received per unit time from the optical beacon roadside communication device 151 is larger than the amount of data transmitted per unit time to the navigation device 171.

  Therefore, the optical beacon in-vehicle communication device 101 is provided with a transfer standby buffer for temporarily holding provided information to be transferred to the navigation device 171. In order to make the in-vehicle communication device for optical beacon 101 small and low-cost, it is preferable that the capacity of the transfer standby buffer is small.

  Therefore, in the in-vehicle communication device for optical beacon 101 according to the embodiment of the present invention, such a problem is solved by the following configuration and operation.

[Configuration of in-vehicle communication device for optical beacons]
FIG. 7 is a diagram showing the configuration of the in-vehicle communication device for optical beacons in the infrared transmission system according to the embodiment of the present invention.

  Referring to FIG. 7, an optical beacon in-vehicle communication device 101 includes a photodiode (reception unit) 21, an amplifier circuit 22, an FPGA (Field-Programmable Gate Array) 23, a drive circuit 24, and an LED (Light Emitting Diode). 25).

  The photodiode 21 has a light receiving surface capable of detecting infrared rays, for example. The photodiode 21 is installed, for example, so that the light receiving surface can receive an infrared signal transmitted from the optical beacon roadside communication device 151 via the windshield in the automobile 11.

  For example, as shown in FIG. 1, when the in-vehicle optical beacon communication device 101 provided in the automobile 11 passes through a predetermined space Sir1, Sir2, the photodiode 21 receives the infrared signal transmitted from the optical beacon roadside communication device 151. Reception is performed at the light receiving surface. For example, the photodiode 21 generates a current corresponding to the intensity of the infrared signal received on the light receiving surface, and outputs the generated current to the amplifier circuit 22 as an electric signal.

  The amplifier circuit 22 receives an electric signal, that is, a current received from the photodiode 21, by a resistor in the amplifier circuit 22, and amplifies a voltage generated in the resistor. Then, the amplifier circuit 22 outputs the amplified voltage to the FPGA 23 as an electric signal.

  For example, the FPGA 23 acquires the provision information included in the infrared signal transmitted by the optical beacon roadside communication device 151 based on the electrical signal received from the amplifier circuit 22, and transmits the obtained provision information to the navigation device 171. To do.

  When the navigation apparatus 171 receives the provision information from the FPGA 23, the navigation apparatus 171 performs a process according to the received provision information.

  For example, when receiving transmission information from the navigation device 171, the FPGA 23 temporarily holds the received transmission information.

  The drive circuit 24 drives the LED 25. More specifically, the drive circuit 24 acquires transmission information temporarily held in the FPGA 23 as an electrical signal, and supplies power to the LED 25 according to the acquired electrical signal, for example, to turn off the LED 25. It controls and irradiates the infrared signal containing transmission information from LED25.

[Configuration of FPGA]
FIG. 8 is a diagram showing the configuration of the FPGA in the in-vehicle communication device for optical beacons according to the embodiment of the present invention.

  Referring to FIG. 8, the FPGA 23 includes a transfer unit 31, a reception processing unit 32, and a transmission standby buffer 33. The transfer unit 31 includes a gate unit 34, a transfer standby buffer 35, and a transmission processing unit 36.

  For example, the reception processing unit 32 acquires transmission information from the electrical signal received from the navigation device 171. Then, for example, the reception processing unit 32 generates a frame 401 including the acquired transmission information, and outputs the generated frame 401 to the transmission standby buffer 33.

  The transmission standby buffer 33 temporarily holds the frame 401 received from the reception processing unit 32. The frame 401 held in the transmission standby buffer 33 is acquired by the drive circuit 24 and then deleted.

  The transfer unit 31 acquires provision information included in the infrared signal received by the photodiode 21 and transfers it to the navigation device 171.

  FIG. 9 is a diagram showing the configuration of the gate section in the FPGA according to the embodiment of the present invention.

  Referring to FIG. 9, gate unit 34 includes a provision information acquisition unit 41, a provision information processing unit 42, a buffer 43, and a buffer control unit 44. The provided information processing unit 42 includes a header information processing unit 46, a transfer restriction unit 47, and an ID information acquisition unit 48.

  The gate unit 34 in the transfer unit 31 acquires and processes the provision information included in the frame 401 from the electrical signal received from the amplifier circuit 22.

  More specifically, the provided information acquisition unit 41 in the gate unit 34 monitors information included in the electrical signal received from the amplifier circuit 22 and detects 7EH stored in the first synchronization area in the frame 401, for example.

  For example, based on the detected 7EH, the provided information acquisition unit 41 converts the values stored in the header area, the actual data area, the idle area, and the CRC area following the first synchronization area into header information, actual data information, AAH, and Obtained as CRC information.

  When the provided information acquisition unit 41 acquires the header information, the actual data information, the AAH, and the CRC information, for example, using the acquired CRC information, the provided information acquisition unit 41 tests for errors in values stored in the header area, the actual data area, and the idle area. .

  When the test result indicates normality, the provision information acquisition unit 41 holds, for example, the header information and the real data information stored in the header area and the real data area, that is, the provision information in the buffer 43 and provides the provision information acquisition signal. Is output to the provided information processing unit 42. On the other hand, the provided information acquisition unit 41 discards, for example, the acquired header information, actual data information, AAH, and CRC information when the test result indicates abnormality.

  For example, when the provision information processing unit 42 receives the provision information acquisition signal from the provision information acquisition unit 41, the provision information processing unit 42 processes the provision information held in the buffer 43 by the provision information acquisition unit 41.

  FIG. 10 is a diagram showing a configuration of the header information processing unit in the provided information processing unit according to the embodiment of the present invention.

  Referring to FIG. 10, header information processing unit 46 includes an information type acquisition unit 61 and a frame number acquisition unit 62.

  For example, when the header information processing unit 46 in the provision information processing unit 42 receives the provision information acquisition signal from the provision information acquisition unit 41, the header information processing unit 46 processes the header information held in the buffer 43.

  More specifically, when the information type acquisition unit 61 in the header information processing unit 46 receives the provision information acquisition signal from the provision information acquisition unit 41, for example, the value of the first byte from the beginning of the header information held in the buffer 43 That is, the type value is acquired, and the acquired type value is output to the ID information acquisition unit 48 and the transfer restriction unit 47.

  For example, when receiving the provision information acquisition signal from the provision information acquisition unit 41, the frame number acquisition unit 62 acquires the value of the fourth byte from the beginning of the header information held in the buffer 43, that is, the frame number, and acquires the acquired frame number. Is output to the ID information acquisition unit 48 and the transfer restriction unit 47.

  Referring to FIG. 9 again, the ID information acquisition unit 48 in the provided information processing unit 42 monitors, for example, the type value and frame number received from the header information processing unit 46, and displays the sixth and ninth frames shown in FIG. When the type value and the frame number indicate “02” and “01”, respectively, in the monitoring result like the frame 401, the following processing is performed.

  That is, the ID information acquisition unit 48 acquires, for example, the first to third byte values from the beginning of the actual data information held in the buffer 43, that is, ID information, and outputs the acquired ID information to the transfer restriction unit 47. To do.

  FIG. 11 is a diagram showing a configuration of the transfer restriction unit in the gate unit according to the embodiment of the present invention.

  Referring to FIG. 11, transfer restriction unit 47 includes a flag determination unit 51, a transfer determination unit 54, a flag holding unit 55, a restriction state setting unit 56, a providing source determination unit 57, and a counter 58. .

  The transfer restriction unit 47 restricts transfer of the same type of information transmitted from the same optical beacon roadside communication device 151 to the navigation device 171 among the provided information.

[Judgment of new provider of information]
More specifically, the providing source determination unit 57 in the transfer restriction unit 47 determines whether the providing information included in the infrared signal received by the photodiode 21 is the providing information received from the same optical beacon roadside communication device 151. Judging.

  In other words, the provider determination unit 57 determines whether the provision information included in the infrared signal received by the photodiode 21 is provision information received from the new optical beacon roadside communication device 151. Process.

  Specifically, the providing source determination unit 57 provides, for example, the provision information included in the infrared signal received from the new optical beacon roadside communication device 151 based on the ID information received from the ID information acquisition unit 48. It is determined whether it is information.

  For example, when receiving the ID information from the ID information acquisition unit 48, the provider determining unit 57 holds the received ID information. For example, when receiving new ID information from the ID information acquisition unit 48, the provider determination unit 57 compares the ID information received this time with the ID information held last time.

  For example, when the comparison result indicates that the ID information received this time is different from the previously held ID information, the providing source determination unit 57 sets the provided information included in the infrared signal received by the photodiode 21 this time to a new optical beacon. It is determined that the provision information is received from the roadside communication device 151, and a new provision source detection signal is output to the restriction state setting unit 56.

  For example, when the comparison result indicates that the ID information received this time and the previously held ID information are the same, the providing source determination unit 57 uses the optical beacon that is the transmission source of the infrared signal received by the photodiode 21. It is determined that there is no change in the roadside communication device 151, and a provider maintenance signal is output to the restriction state setting unit 56.

  Further, the provider determining unit 57, for example, determines whether the provided information included in the infrared signal received by the photodiode 21 is the same as the roadside communication for the optical beacon based on whether the infrared signal is not received by the photodiode 21 for a predetermined time or longer. It is determined whether the provision information is received from the device 151.

  Specifically, for example, after the infrared signal is not received by the photodiode 21 for a predetermined time or longer, the providing source determination unit 57 uses the new information received from the infrared signal received as the new beacon roadside communication device. It is determined that the provision information is received from 151.

  More specifically, the counter 58 counts clock pulses generated by, for example, an oscillation circuit using a crystal resonator, and holds the counted value. For example, each time the provision source determination unit 57 receives a provision information acquisition signal from the provision information acquisition unit 41, the provision source determination unit 57 refers to the count value in the counter 58 and holds the referenced count value. For example, when receiving a new provision information acquisition signal from the provision information acquisition unit 41, the provider determination unit 57 acquires a difference between the count value held last time and the count value held this time.

  For example, when the acquired difference is greater than or equal to a predetermined value, that is, when the infrared signal has not been received by the photodiode 21 for a predetermined time or longer, the provider determining unit 57 is included in the infrared signal newly received by the photodiode 21 this time. The provided information is determined to be the received information received from the new optical beacon roadside communication device 151. Then, the provider determination unit 57 outputs, for example, a new provider detection signal to the restriction state setting unit 56.

  For example, when the acquired difference is smaller than a predetermined value, that is, when the infrared signal is repeatedly received in the photodiode 21 within a time shorter than the predetermined time, the provider determination unit 57 receives the infrared signal received by the photodiode 21. It determines that there is no change in the optical beacon roadside communication device 151 that is the transmission source of the provision information included in the provision information, and outputs a provision source maintenance signal to the restriction state setting unit 56.

[Transfer Target Settings]
For example, the transfer restriction unit 47 sets the information of the type set from the navigation device 171 among the provided information included in the infrared signal as the transfer target.

  More specifically, the navigation device 171 uses, for example, the type registration information including the type value indicating the type of required provision information among the provision information transmitted from the roadside communication unit for optical beacon 151, the in-vehicle communication unit for optical beacon. 101 to the restriction state setting unit 56.

  The restriction state setting unit 56 in the transfer restriction unit 47 registers the type of provision information to be transferred to the navigation device 171 based on the type registration information received from the navigation device 171.

  Specifically, the flag holding unit 55 holds, for each type value, a flag indicating whether or not the provision information received from the optical beacon roadside communication device 151 should be transferred to the navigation device 171, for example.

  For example, the flag being on means that the provided information of the type corresponding to the flag is a transfer target to be transferred from the optical beacon roadside communication device 151 to the navigation device 171. Further, for example, that the flag is in an off state means that the provided information of the type corresponding to the flag is a discard target to be discarded.

  For example, in the flag in the flag holding unit 55, the restriction state setting unit 56 sets the flag corresponding to the type value included in the type registration information to the on state, and the flag corresponding to the type value not included in the type registration information By performing a flag reset process for setting the “OFF” state, the type of provision information to be transferred to the navigation device 171 is registered.

[Reset Flag]
For example, when reception of an infrared signal from a new optical beacon roadside communication device 151 is started in the photodiode 21, the transfer restriction unit 47 changes the restriction state of the transfer of provided information to the navigation device 171 to an unrestricted state. return.

  Specifically, for example, when the restriction state setting unit 56 in the transfer restriction unit 47 receives a new provision source detection signal from the provision source determination unit 57, the provision information is transferred to the navigation device 171 by performing a flag reset process. The restriction state is returned to the unrestricted state and a provider determination completion signal is output to the flag determination unit 51.

  In addition, for example, when the restriction state setting unit 56 receives the provision source maintenance signal from the provision source determination unit 57, the restriction state setting unit 56 maintains the restriction state of the transfer of the provision information to the navigation device 171 and sends the provision source determination completion signal to the flag determination unit To 51.

[Transfer target acquisition processing]
For example, when the flag determination unit 51 receives a type value from the information type acquisition unit 61 in the header information processing unit 46 and receives a provider determination completion signal from the restriction state setting unit 56, among the flags in the flag holding unit 55, The state of the flag corresponding to the type value received from the information type acquisition unit 61 is confirmed.

  For example, when the flag is on, the flag determination unit 51 outputs a transfer target signal to the transfer determination unit 54. For example, when the flag is in an off state, the flag determination unit 51 outputs a discard target signal to the transfer determination unit 54.

[Transfer restriction processing]
FIG. 12 is a diagram showing a configuration of the transfer determination unit in the transfer restriction unit according to the embodiment of the present invention.

  Referring to FIG. 12, transfer determination unit 54 includes single frame acquisition processing unit 71, frame group acquisition processing unit 72, frame processing control unit 73, mode setting unit 74, and frame group type value holding unit 75. And a frame order holding unit 76. The single frame acquisition processing unit 71 includes a single frame determination unit 81, a single frame acquisition determination unit 82, and a first frame determination unit 83. The frame group acquisition processing unit 72 includes a frame group acquisition determination unit 86, a frame group acquisition completion determination unit 87, and a type value change determination unit 88.

  For example, when the acquisition of the plurality of frames 401 including the same type of provision information divided into a plurality of pieces is completed, the transfer unit 31 transfers the provision information included in the plurality of frames 401 to the navigation device 171. To limit the transfer of provided information.

  Specifically, for example, when the transfer unit 31 acquires the first frame of the plurality of frames 401, that is, the first frame 501, the transfer unit 31 starts holding the provision information included in the plurality of frames 401. .

  Then, for example, when the acquisition of the plurality of frames 401 is completed, the transfer unit 31 starts to transfer the provision information included in the plurality of frames 401 including the held information to the navigation device 171. And restricting the transfer of the provided information.

  More specifically, the transfer determination unit 54 in the transfer unit 31 transfers the provision information transmitted by being divided into a plurality of frames by the frame group 402 and the provision information transmitted by the single frame 401 to the navigation device 171. Judge whether or not.

  The mode setting unit 74 in the transfer determination unit 54 sets, for example, a single frame acquisition mode by default, and frames according to the mode change signals received from the single frame acquisition processing unit 71 and the frame group acquisition processing unit 72, respectively. Change settings between group acquisition mode and single frame acquisition mode.

  For example, when the frame processing control unit 73 receives a transfer target signal or a discard target signal from the flag determination unit 51, receives a type value from the information type acquisition unit 61, and receives a frame number from the frame number acquisition unit 62, Process.

  That is, for example, the frame processing control unit 73 checks the mode set by the mode setting unit 74, and when the single frame acquisition mode is set, the single frame processing start signal is sent to the single frame acquisition processing unit 71. Is output. For example, when the frame group acquisition mode is set, the frame processing control unit 73 outputs a frame group processing start signal to the frame group acquisition processing unit 72.

  For example, when the frame processing control unit 73 receives a reset signal from the frame group acquisition determination unit 86, the frame processing control unit 73 outputs a single frame processing start signal to the single frame acquisition processing unit 71.

  The frame group type value holding unit 75 holds, for example, a frame group type value indicating the type of the frame group 402 that is a determination target for whether or not to transfer. The frame order holding unit 76 holds a frame order k indicating the order of the frames 401 in the frame group 402, for example.

[Single frame acquisition processing]
For example, when the single frame acquisition processing unit 71 receives a single frame processing start signal from the frame processing control unit 73, the single frame acquisition processing unit 71 starts the single frame acquisition processing.

  The single frame determination unit 81 in the single frame acquisition processing unit 71 divides the provided information into a plurality of frames 401 based on the frame number received from the frame number acquisition unit 62, for example, from the optical beacon roadside communication device 151. It is determined whether or not it has been transmitted.

  Specifically, for example, when the value of the received frame number is other than 81H, the single frame determination unit 81 divides the provision information into a plurality of frames 401 and transmits it from the optical beacon roadside communication device 151. The frame group signal is output to the single frame acquisition determination unit 82.

  On the other hand, for example, when the value of the received frame number is 81H, the single frame determination unit 81 determines that the provision information is transmitted from the optical beacon roadside communication device 151 by the single frame 401, and the single frame The signal is output to the single frame acquisition determination unit 82.

  For example, based on the frame number received from the frame number acquisition unit 62, the first frame determination unit 83 determines whether or not the frame 401 storing the provision information acquired by the provision information acquisition unit 41 is the first frame 501. Determine whether.

  Specifically, for example, when the value of the received frame number is other than 01H, the first frame determination unit 83 determines that the frame 401 storing the provision information acquired by the provision information acquisition unit 41 is the first frame. It is determined that it is not 501, and the first frame negative signal is output to the single frame acquisition determination unit 82.

  On the other hand, for example, when the value of the received frame number is 01H, the first frame determination unit 83 determines that the frame 401 that has stored the provision information acquired by the provision information acquisition unit 41 is the first frame 501. The first frame affirmative signal is output to the single frame acquisition determination unit 82.

  The single frame acquisition determination unit 82 performs, for example, a determination process regarding acquisition of provision information included in the frame 401 based on signals received from the flag determination unit 51, the single frame determination unit 81, and the first frame determination unit 83, respectively. Do.

  More specifically, for example, when receiving a transfer target signal from the flag determination unit 51, the single frame acquisition determination unit 82 receives the frame group signal and the first frame from the single frame determination unit 81 and the first frame determination unit 83, respectively. When a frame negative signal is received or when a discard target signal is received from the flag determination unit 51, the following processing is performed.

  That is, the single frame acquisition determination unit 82 is held in the buffer 43 because, for example, it is not provided information included in the first frame 501 in the frame group 402 or is provided information to be discarded. Judge that the provided information should be discarded. Then, the single frame acquisition determination unit 82 outputs a discard command signal to the buffer control unit 44 together with the type value received from the information type acquisition unit 61, for example.

  In addition, for example, when receiving a transfer target signal from the flag determination unit 51, the single frame acquisition determination unit 82 receives a single frame signal and a first frame negation from the single frame determination unit 81 and the first frame determination unit 83, respectively. When receiving a signal, the following processing is performed.

  That is, the single frame acquisition determination unit 82 determines that the provision information held in the buffer 43 should be transferred because the provision information is the transmission target transmission information transmitted by the single frame 401, for example. Then, the single frame acquisition determination unit 82 outputs a transfer command signal to the buffer control unit 44 together with the type value received from the information type acquisition unit 61, for example. Then, the single frame acquisition determination unit 82 outputs the type value to the restriction state setting unit 56, for example.

  In addition, for example, when receiving a transfer target signal from the flag determination unit 51, the single frame acquisition determination unit 82 receives a frame group signal and a first frame affirmation signal from the single frame determination unit 81 and the first frame determination unit 83, respectively. When receiving, the following processing is performed.

  That is, since the single frame acquisition determination unit 82 is, for example, the provision information to be transferred included in the first frame 501 in the frame group 402, the single frame acquisition determination unit 82 should hold the provision information included in the frame 401 after the second frame 502. And a mode change signal is output to the mode setting unit 74. Thereby, in the vehicle-mounted communication device 101 for optical beacons, the mode is switched from the single frame acquisition mode to the frame group acquisition mode.

  Then, for example, the single frame acquisition determination unit 82 holds the type value received from the information type acquisition unit 61 in the frame group type value holding unit 75 as the frame group type value, and sets 2H as the frame order k. 76.

[Frame group acquisition processing]
For example, when the frame group acquisition processing unit 72 receives a frame group processing start signal from the frame processing control unit 73, the frame group acquisition processing unit 72 starts the frame group acquisition processing.

  The type value change determination unit 88 in the frame group acquisition processing unit 72 determines, for example, whether or not a type value change has occurred based on the type value received from the information type acquisition unit 61.

  Specifically, for example, the type value change determination unit 88 compares the frame group type value held in the frame group type value holding unit 75 with the type value received from the information type acquisition unit 61, and the two match. The type value maintenance signal is output to the frame group acquisition determination unit 86 and the frame group acquisition completion determination unit 87.

  On the other hand, the type value change determination unit 88 outputs a type value change signal to the frame group acquisition determination unit 86 and the frame group acquisition completion determination unit 87, for example, if they do not match.

  For example, when receiving the type value maintenance signal from the type value change determination unit 88, the frame group acquisition completion determination unit 87 completes the acquisition of each frame 401 in the frame group 402 based on the frame number received from the frame number acquisition unit 62. Determine whether or not.

  Specifically, for example, the frame group acquisition completion determination unit 87 compares the frame order k held in the frame order holding unit 76 with the value of the lower 7 bits of the frame number. Process.

  That is, for example, when the value of the upper 1 bit of the frame number is not 1H, the frame group acquisition completion determination unit 87 determines that the acquisition of each frame 401 in the frame group 402 has not been completed, and the frame order storage unit 76 The retained frame order k is incremented.

  Further, for example, when the value of the upper 1 bit of the frame number is 1H, the frame group acquisition completion determination unit 87 determines that the acquisition of each frame 401 in the frame group 402 is completed, and sends a frame group acquisition completion signal to the frame The data is output to the group acquisition determination unit 86.

  On the other hand, for example, when the frame order k and the lower 7 bits of the frame number do not match, the frame group acquisition completion determination unit 87 determines that acquisition of each frame 401 in the frame group 402 has failed, and the frame group acquisition failure The signal is output to the frame group acquisition determination unit 86.

  For example, the frame group acquisition determination unit 86 performs a determination process regarding acquisition of provision information included in the frame group 402 based on signals received from the type value change determination unit 88 and the frame group acquisition completion determination unit 87, respectively.

  More specifically, for example, when receiving the type value change signal from the type value change determining unit 88, the frame group acquisition determining unit 86 acquires the entire provision information included in each frame 401 included in the frame group 402. It is determined that different types of provision information have been acquired before, and it is determined that the provision information held in the buffer 43 should be discarded. Then, for example, the frame group acquisition determination unit 86 acquires the frame group type value held in the frame group type value holding unit 75 and outputs a discard command signal to the buffer control unit 44 together with the acquired frame group type value.

  Then, for example, the frame group acquisition determination unit 86 outputs a mode change signal to the mode setting unit 74 and also outputs a reset signal to the frame processing control unit 73. Thereby, in the vehicle-mounted communication device 101 for optical beacons, the mode is switched from the frame group acquisition mode to the single frame acquisition mode, and single frame acquisition processing is performed.

  For example, when receiving a type value maintenance signal from the type value change determination unit 88, the frame group acquisition determination unit 86 performs the following processing when receiving a frame group acquisition failure signal from the frame group acquisition completion determination unit 87. .

  That is, for example, the frame group acquisition determination unit 86 determines that the divided portion of the provision information included in each frame 401 in the frame group 402 is missing, and discards the provision information held in the buffer 43. to decide. Then, for example, the frame group acquisition determination unit 86 acquires the frame group type value held in the frame group type value holding unit 75 and outputs a discard command signal to the buffer control unit 44 together with the acquired frame group type value.

  Then, for example, frame group acquisition determination unit 86 outputs a mode change signal to mode setting unit 74. Thereby, in the vehicle-mounted communication device 101 for optical beacons, the mode is switched from the frame group acquisition mode to the single frame acquisition mode.

  For example, when receiving the type value maintenance signal from the type value change determination unit 88, the frame group acquisition determination unit 86 performs the following processing when receiving the frame group acquisition completion signal from the frame group acquisition completion determination unit 87. .

  That is, for example, the frame group acquisition determination unit 86 determines that the entire provision information included in each frame 401 in the frame group 402 is correctly acquired and should transfer the provision information held in the buffer 43. to decide. Then, for example, the frame group acquisition determination unit 86 acquires the frame group type value held in the frame group type value holding unit 75 and outputs a transfer command signal to the buffer control unit 44 together with the acquired frame group type value.

  Then, for example, the frame group acquisition determination unit 86 outputs the frame group type value to the restriction state setting unit 56 and outputs a mode change signal to the mode setting unit 74. Thereby, in the vehicle-mounted communication device 101 for optical beacons, the mode is switched from the frame group acquisition mode to the single frame acquisition mode.

Update flag
Referring to FIG. 11 again, for example, upon receiving the type value from single frame acquisition determining unit 82 in transfer determining unit 54, restriction state setting unit 56 sets a flag in flag holding unit 55 corresponding to the received type value. Set it to the off state.

  For example, when the restriction state setting unit 56 receives a frame group type value from the frame group acquisition determination unit 86 in the transfer determination unit 54, the restriction state setting unit 56 turns off the flag in the flag holding unit 55 corresponding to the received frame group type value. Set.

[Processing of provided information held in the buffer 43]
Referring again to FIG. 9, the buffer control unit 44 processes the provision information held in the buffer 43 based on the signal from the transfer determination unit 54 in the transfer restriction unit 47.

  Specifically, for example, when the buffer control unit 44 receives a transfer command signal together with the type value from the single frame acquisition determination unit 82 in the transfer determination unit 54, the buffer control unit 44 receives the received type from the provided information held in the buffer 43. The movement of the provided information including the value to the transfer standby buffer 35 is started.

  For example, when the buffer control unit 44 receives a transfer command signal together with the frame group type value from the frame group acquisition determination unit 86 in the transfer determination unit 54, the buffer control unit 44 receives the received frame group type from the provided information held in the buffer 43. The movement of the provided information including the value to the transfer standby buffer 35 is started.

  For example, when the buffer control unit 44 receives a discard command signal together with the type value from the single frame acquisition determining unit 82, the buffer control unit 44 displays the provided information including the received type value among the provided information held in the buffer 43. Erase from

  For example, when the buffer control unit 44 receives a discard command signal together with the frame group type value from the frame group acquisition determining unit 86, the provided information including the received frame group type value among the provided information held in the buffer 43. Is deleted from the buffer 43.

  Referring to FIG. 8 again, transmission processing unit 36 transmits the provision information moved from gate unit 34 to transfer standby buffer 35 to navigation device 171 according to a predetermined protocol, for example.

[Operation]
FIG. 13: is the flowchart which defined the operation | movement procedure at the time of restrict | providing the provision information which the vehicle-mounted communication apparatus for optical beacons which concerns on embodiment of this invention transfers to a navigation apparatus. The optical beacon in-vehicle communication device 101 in the infrared transmission system 201 includes a computer, and an arithmetic processing unit such as a CPU in the computer reads a program including a part or all of each step of the following flowchart from a memory (not shown). Run. The program of this apparatus can be installed from the outside. The program of this device is distributed in a state stored in a recording medium.

  Referring to FIG. 13, first, for example, a situation is assumed in which automobile 11 provided with optical beacon in-vehicle communication device 101 travels on traveling lane CL1 on road Rd1. Also, assume that the single-frame acquisition mode is set in the optical beacon in-vehicle communication device 101.

  The optical beacon in-vehicle communication device 101 waits until an infrared signal including the frame 401 is received from the optical beacon roadside communication device 151 (NO in step S102). When the in-vehicle communication device 101 for optical beacons can receive the infrared signal by entering the predetermined spaces Sir1 and Sir2, the provided information is acquired from the frame 401 included in the infrared signal (YES in step S102).

  Next, the optical beacon vehicle-mounted communication device 101 acquires a type value and a frame number from the acquired provided information (step S104).

  Next, the in-vehicle optical beacon communication device 101 performs a provider determination process for determining whether or not provision information has been acquired from the new optical beacon roadside communication device 151 (step S106).

  Next, the in-vehicle communication device for optical beacon 101 performs a transfer restriction process for restricting transfer of the acquired provided information to the navigation device 171 (step S108).

  Next, the in-vehicle optical beacon communication device 101 continues to obtain the provided information until it cannot receive the infrared signal including the frame 401 from the optical beacon roadside communication device 151 (YES in step S102), and the infrared signal is transmitted to the optical beacon. If it becomes impossible to receive from the roadside communication device 151, it waits until an infrared signal including the frame 401 can be received from the optical beacon roadside communication device 151 (NO in step S102).

  The provider determination process (step S106) may be performed before the type value and frame number acquisition process (step S104).

  FIG. 14 is a flowchart that defines an operation procedure when the in-vehicle optical beacon communication device according to the embodiment of the present invention performs a provider determination process. FIG. 14 shows details of the operation of the provider determination process in step S106 of FIG.

  Referring to FIG. 14, first, in-vehicle communication device for optical beacon 101, when a predetermined time or more has elapsed from the previous acquisition information acquisition to the current provision information acquisition (YES in step S202), flag A flag reset process for setting all flags corresponding to the type values to be transferred to the navigation device 171 among the flags in the holding unit 55 to the on state is performed (step S210).

  On the other hand, the in-vehicle communication device for optical beacon 101 performs the following process when a predetermined time or more has not passed since the previous provision information was acquired until the present provision information is acquired (NO in step S202).

  That is, when the provided information includes ID information (YES in step S204), the in-vehicle optical beacon communication device 101 acquires the ID information from the provided information, and compares the acquired ID information with the previously acquired ID information. (Step S206).

  Next, when the two ID information are different in the comparison result (YES in step S208), the in-vehicle communication device for optical beacon 101 performs a flag reset process (step S210).

  On the other hand, when the two ID information are the same in the comparison result (NO in step S208), the in-vehicle optical beacon communication device 101 determines that the provision information has not been acquired from the new optical beacon roadside communication device 151. .

  Also, if the ID information is not included in the provided information (NO in step S204), the in-vehicle optical beacon communication device 101 determines that the provided information is not acquired from the new optical beacon roadside communication device 151.

  FIG. 15 is a flowchart defining an operation procedure when the optical beacon in-vehicle communication device according to the embodiment of the present invention performs the transfer restriction process. FIG. 15 shows details of the operation of the transfer restriction process in step S108 of FIG.

  Referring to FIG. 15, first, when the single frame acquisition mode is set (YES in step S302), the optical beacon vehicle-mounted communication device 101 performs a single frame acquisition process (step S304).

  On the other hand, when the frame group acquisition mode is set (NO in step S302), the optical beacon vehicle-mounted communication device 101 performs a frame group acquisition process (step S306).

  FIG. 16 is a flowchart that defines an operation procedure when the in-vehicle optical beacon communication device according to the embodiment of the present invention performs a single frame acquisition process. FIG. 16 shows details of the single frame acquisition process in step S304 of FIG.

  Referring to FIG. 16, first, the in-vehicle optical beacon communication device 101 confirms the state of the flag corresponding to the acquired type value among the flags in the flag holding unit 55, and the flag indicates an on state ( In step S402, the following process is performed.

  That is, if the value of the frame number is 01H instead of 81H (NO in step S404 and YES in step S406), the optical beacon in-vehicle communication device 101 transitions to the frame group acquisition mode (step S408).

  Next, the optical beacon vehicle-mounted communication device 101 sets the frame order k to 2H (step S410).

  Next, the optical beacon vehicle-mounted communication device 101 holds the acquired type value as a frame group type value (step S412).

  If the value of the frame number is 81H (YES in step S404), the in-vehicle optical beacon communication device 101 moves the provision information corresponding to the acquired type value from the buffer 43 to the transfer standby buffer 35 (step S416). ).

  Next, the in-vehicle optical beacon communication device 101 sets the flag corresponding to the acquired type value among the flags in the flag holding unit 55 to an off state (step S418).

  Further, when the frame number value is other than 81H and 01H (NO in step S404 and NO in step S406), the optical beacon in-vehicle communication device 101 deletes the provision information corresponding to the acquired type value from the buffer 43. (Step S414).

  Further, when the flag indicates the off state (NO in step S402), the in-vehicle optical beacon communication device 101 deletes the provision information corresponding to the acquired type value from the buffer 43 (step S414).

  Note that the optical beacon in-vehicle communication device 101 retains the process of transitioning to the frame group acquisition mode (step S408), the process of setting the frame order k to 2H (step S410), and the acquired type value as the frame group type value. The processing (step S412) to be performed may be performed in parallel, or the order of these processing may be changed.

  Also, the optical beacon in-vehicle communication device 101 moves the provision information corresponding to the acquired type value to the transfer standby buffer 35 (step S416), and sets the flag corresponding to the acquired type value to the off state. (Step S418) may be performed in parallel, or the order of these processes may be changed.

  FIG. 17 is a flowchart defining an operation procedure when the optical beacon in-vehicle communication device according to the embodiment of the present invention performs a frame group acquisition process. FIG. 17 shows details of the operation of the frame group acquisition process in step S306 of FIG.

  With reference to FIG. 17, first, when the acquired type value and the frame group type value are the same (YES in step S <b> 502), the optical beacon in-vehicle communication device 101 performs the following processing.

  In other words, the optical beacon in-vehicle communication device 101 determines that the lower 7 bits of the frame number are in the frame order k and the upper 1 bit of the frame number is 1H (YES in step S504 and YES in step S506). ), The provision information corresponding to the frame group type value is moved from the buffer 43 to the transfer standby buffer 35 (step S508).

  Next, the in-vehicle optical beacon communication device 101 sets the flag corresponding to the frame group type value among the flags in the flag holding unit 55 to an off state (step S510).

  Next, the in-vehicle optical beacon communication device 101 makes a transition to the single frame acquisition mode (step S522).

  Also, the optical beacon in-vehicle communication device 101, when the value of the lower 7 bits of the frame number is in the frame order k and the value of the upper 1 bit of the frame number is not 1H (YES in step S504 and NO in step S506), The frame order k is incremented (step S512).

  Also, if the value of the lower 7 bits of the frame number is not in the frame order k (NO in step S504), the optical beacon vehicle-mounted communication device 101 deletes the provision information corresponding to the frame group type value from the buffer 43 (step S520). ).

  Next, the in-vehicle optical beacon communication device 101 makes a transition to the single frame acquisition mode (step S522).

  If the acquired type value and the frame group type value are not the same (NO in step S502), the in-vehicle communication device for optical beacon 101 deletes the provision information corresponding to the frame group type value from the buffer 43 (step S514). ).

  Next, the optical beacon in-vehicle communication device 101 makes a transition to the single frame acquisition mode (step S516).

  Next, the optical beacon vehicle-mounted communication device 101 performs a single frame acquisition process (step S518).

  The process of moving the provision information corresponding to the frame group type value to the transfer standby buffer 35 (step S508) and the process of setting the flag corresponding to the frame group type value to the off state (step S510) are performed in parallel. Alternatively, the order of these processes may be changed.

  Further, the process of deleting the provision information corresponding to the frame group type value from the buffer 43 (step S514) and the process of transitioning to the single frame acquisition mode (step S516) may be performed in parallel. The order may be changed.

  The optical beacon vehicle-mounted communication device according to the embodiment of the present invention is the same information transmitted from the same optical beacon roadside communication device 151 among the provided information received from the optical beacon roadside communication device 151. The type information is transferred to the navigation device 171 once, that is, the number of transfers is limited to one, but the present invention is not limited to this. For example, the optical beacon in-vehicle communication device 101 limits the number of times the same type of information transmitted from the same optical beacon roadside communication device 151 to the navigation device 171 among the above-mentioned provided information is transferred to a plurality of times. It may be configured to.

  Also, the optical beacon in-vehicle communication device according to the embodiment of the present invention is provided from the plurality of frames 401 when the provided information is divided into a plurality of frames 401 and transmitted from the optical beacon roadside communication device 151. The information is extracted and the extracted provided information is transferred to the navigation device 171. However, the present invention is not limited to this. For example, in the above case, the optical beacon in-vehicle communication device may be configured to transfer the plurality of frames 401 to the navigation device 171 as they are, or convert the plurality of frames 401 into frames of different formats and transfer them. It may be configured to.

  Moreover, in the vehicle-mounted communication device for optical beacons according to the embodiment of the present invention, the provided information included in the infrared signal received by the photodiode 21 is the same as the roadside communication for optical beacon based on the ID information as the providing source determination process. A process included in the infrared signal received by the photodiode 21 on the basis of the process of determining whether the received information is received from the device 151 and whether the infrared signal is not received by the photodiode 21 for a predetermined time or longer. Although it is the structure which performs both the processes which judge whether information is the provision information received from the same optical beacon roadside communication apparatus 151, it is not limited to this. The optical beacon in-vehicle communication device 101 may be configured to perform either one of the two processes.

  In addition, in the in-vehicle communication device for optical beacons according to the embodiment of the present invention, among the provided information included in the infrared signal, the type of information set from the navigation device 171 is the transfer target. However, the present invention is not limited to this. The optical beacon in-vehicle communication device 101 may have a configuration in which all types of provided information types that can be received from the optical beacon roadside communication device 151 are to be transferred.

  By the way, in the received data processing system described in Patent Document 1, the process of storing the information received from the optical beacon roadside communication device in the external storage device is performed by the configuration using the DMA method. There is a need for an in-vehicle optical beacon communication device that transfers information received from an optical beacon roadside communication device to, for example, a navigation device with a smaller and lower cost configuration than the technology described in Patent Document 1. Yes.

  In contrast, in the in-vehicle optical beacon communication device according to the embodiment of the present invention, the photodiode 21 receives an infrared signal from the optical beacon roadside communication device 151. The transfer unit 31 acquires provision information included in the infrared signal received by the photodiode 21 and transfers it to the navigation device 171. And the transfer part 31 restrict | limits the transfer to the navigation apparatus 171 of the information transmitted from the same optical beacon roadside communication apparatus 151 among the provision information, and the same kind of information.

  With such a configuration, in the provided information received from the same optical beacon roadside communication device 151, it is possible to prevent the provided information having the same content from being repeatedly transferred to the navigation device 171. Therefore, the provided information to be transferred to the navigation device 171. The amount of data can be reduced.

  As a result, for example, in the optical beacon in-vehicle communication device 101, the amount of data received per unit time from the optical beacon roadside communication device 151 is larger than the amount of data transmitted per unit time to the navigation device 171. Even when a buffer for temporarily holding the information is necessary, the provided information can be appropriately transferred to the navigation device 171 using a small-capacity buffer. That is, the provided information received from the optical beacon roadside communication device 151 can be appropriately transferred to the navigation device 171 with a smaller and lower-cost configuration.

  Further, in the in-vehicle optical beacon communication device according to the embodiment of the present invention, the provided information is divided into a plurality of frames 401 and transmitted from the optical beacon roadside communication device 151. The transfer unit 31 starts transferring the provided information to the navigation device 171 when the acquisition of the plurality of frames 401 is completed.

  As described above, after the entire provision information included in the plurality of frames 401 is acquired and then transferred to the navigation device 171, the provision information is divided in units of the frame 401. Since it is not necessary to manage whether or not the information has been transferred to 171, the transfer of the provided information divided into a plurality of frames 401 to the navigation device 171 can be limited by a simple process.

  Further, in the in-vehicle optical beacon communication device according to the embodiment of the present invention, when the transfer unit 31 acquires the first frame 501 of the plurality of frames 401, the transfer information of the provided information included in the plurality of frames 401 is obtained. When the holding is started and the acquisition of the plurality of frames 401 is completed, the transfer of the provided information including the held information to the navigation device 171 is started.

  As described above, when the first frame 501 of the plurality of frames 401 is acquired, the provision information acquisition process is simplified by the configuration in which the provision of the provision information included in the plurality of frames 401 is started. Therefore, the transfer of the provided information divided into the plurality of frames 401 to the navigation device 171 can be limited by simpler processing.

  In the optical beacon vehicle-mounted communication device according to the embodiment of the present invention, the transfer unit 31 receives the infrared signal received by the photodiode 21 based on whether the infrared signal is not received by the photodiode 21 for a predetermined time or more. It is determined whether the provided information included in the information is the provided information received from the same optical beacon roadside communication device 151.

  With such a configuration, it is possible to determine whether or not the provision information included in the infrared signal is the provision information received from the same optical beacon roadside communication device 151 by a simple process.

  In the in-vehicle optical beacon communication device according to the embodiment of the present invention, the transfer unit 31 provides the information included in the newly received infrared signal after the infrared signal is not received by the photodiode 21 for a predetermined time or longer. Is provided information received from the new optical beacon roadside communication device 151.

  With such a configuration, it is possible to determine whether or not the provision information included in the infrared signal is provision information received from the new optical beacon roadside communication device 151 with a simple process.

  In the in-vehicle optical beacon communication device according to the embodiment of the present invention, the provided information included in the infrared signal includes ID information that is an identifier of the optical beacon roadside communication device 151 that has transmitted the infrared signal. . Then, based on the ID information, the transfer unit 31 determines whether the provision information included in the infrared signal received by the photodiode 21 is provision information received from the same optical beacon roadside communication device 151.

  With such a configuration, it is possible to more reliably determine whether the provision information included in the infrared signal is provision information received from the same optical beacon roadside communication device 151.

  In the in-vehicle optical beacon communication device according to the embodiment of the present invention, the provided information included in the infrared signal includes ID information that is an identifier of the optical beacon roadside communication device 151 that has transmitted the infrared signal. . Then, the transfer unit 31 determines whether the provision information included in the infrared signal received by the photodiode 21 is provision information received from the new optical beacon roadside communication device 151 based on the ID information.

  With such a configuration, it is possible to more reliably determine whether the provision information included in the infrared signal is provision information received from the new optical beacon roadside communication device 151.

  Further, in the in-vehicle optical beacon communication device according to the embodiment of the present invention, the transfer unit 31 receives the infrared signal from the new optical beacon roadside communication device 151 in the photodiode 21 and provides the provided information. The restriction state of the transfer to the navigation device 171 is returned to the unrestricted state.

  Thus, every time the optical beacon roadside communication device 151 that is the transmission source of the provided information is switched, the light before switching is switched by the configuration that returns the restricted state of the transfer of the provided information to the navigation device 171 to the unrestricted state. It is possible to avoid a situation in which provision information of the same type as the provision information transmitted from the beacon roadside communication device 151 is not transferred from the optical beacon roadside communication device 151 to the navigation device 171 after switching.

  Further, in the in-vehicle optical beacon communication device according to the embodiment of the present invention, the transfer unit 31 sets the type of information set from the navigation device 171 among the provided information included in the infrared signal as the transfer target.

  In this way, even when a buffer for temporarily holding provided information is necessary due to a configuration that is limited to information of a type required by the navigation device 171, a buffer with a smaller capacity is used. Thus, the provision information can be appropriately transferred to the navigation device 171.

  The above embodiment should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The above description includes the following features.

[Appendix 1]
A receiver for receiving an infrared signal from the roadside communication device for optical beacons;
A transfer unit that acquires provided information included in the infrared signal received by the receiving unit and transfers the provided information to a navigation device;
The transfer unit restricts transfer to the navigation device of the same type of information transmitted from the same optical beacon roadside communication device among the provided information,
The receiver is a photodiode;
The provided information is included in a frame,
The transfer unit acquires the provision information from the frame included in the infrared signal received by the photodiode and holds the provision information in a buffer;
The transfer unit is held in the buffer when the provided information held in the buffer is information transmitted from the same optical beacon roadside communication device and transferred to the navigation device. Delete the provided information,
If the provided information held in the buffer is information transmitted from the same optical beacon roadside communication device and not transferred to the navigation device, the transfer unit stores information in the buffer. An in-vehicle communication device for an optical beacon that transfers the provided information to the navigation device.

[Appendix 2]
In-vehicle communication device for optical beacons,
A navigation device,
The in-vehicle communication device for the optical beacon is
A receiver for receiving an infrared signal from the roadside communication device for optical beacons;
A transfer unit that acquires provision information included in the infrared signal received by the receiving unit and transfers the information to the navigation device;
The transfer unit restricts transfer to the navigation device of the same type of information transmitted from the same optical beacon roadside communication device among the provided information,
The receiver is a photodiode;
The provided information is included in a frame,
The transfer unit acquires the provision information from the frame included in the infrared signal received by the photodiode and holds the provision information in a buffer;
The transfer unit is held in the buffer when the provided information held in the buffer is information transmitted from the same optical beacon roadside communication device and transferred to the navigation device. Delete the provided information,
If the provided information held in the buffer is information transmitted from the same optical beacon roadside communication device and not transferred to the navigation device, the transfer unit stores information in the buffer. An in-vehicle device that transfers the provided information to the navigation device.

1 Emitter / Receiver 11 Car 21 Photodiode (Receiver)
22 Amplifier circuit 23 FPGA
24 drive circuit 25 LED
31 Transfer Unit 32 Reception Processing Unit 33 Transmission Standby Buffer 34 Gate Unit 35 Transfer Standby Buffer 36 Transmission Processing Unit 41 Provided Information Acquisition Unit 42 Provided Information Processing Unit 43 Buffer 44 Buffer Control Unit 46 Header Information Processing Unit 47 Transfer Restriction Unit 48 ID Information Acquisition unit 51 Flag determination unit 54 Transfer determination unit 55 Flag holding unit 56 Restriction state setting unit 57 Provider determination unit 58 Counter 61 Information type acquisition unit 62 Frame number acquisition unit 71 Single frame acquisition processing unit 72 Frame group acquisition processing unit 73 Frame processing control unit 74 Mode setting unit 75 Frame group type value holding unit 76 Frame order holding unit 81 Single frame determination unit 82 Single frame acquisition determination unit 83 First frame determination unit 86 Frame group acquisition determination unit 87 Frame group acquisition completion Determination unit 88 Type value change determination unit 101 In-vehicle communication device for optical beacon 102 In-vehicle device 151 Roadside communication device for optical beacon 171 Navigation device 201 Infrared transmission system

Claims (8)

A receiver for receiving an infrared signal from the roadside communication device for optical beacons;
A transfer unit that acquires provided information included in the infrared signal received by the receiving unit and transfers the provided information to a navigation device;
The transfer unit includes a transfer restriction unit that restricts transfer of the same type of information to the navigation device that is information transmitted from the same optical beacon roadside communication device among the provided information ,
The transfer restriction unit includes an in- vehicle communication for optical beacons, which includes a providing source determination unit that determines whether the provision information acquired by the transfer unit is information transmitted from the same optical beacon roadside communication device. Machine. The provided information is transmitted from the optical beacon roadside communication device divided into a plurality of frames,
The in-vehicle communication device for optical beacons according to claim 1, wherein the transfer unit starts transferring the provided information to the navigation device when acquisition of the plurality of frames is completed.   The transfer unit starts holding the provision information included in the plurality of frames when the first frame of the plurality of frames is acquired, and holds the information when the acquisition of the plurality of frames is completed. The in-vehicle communication device for an optical beacon according to claim 2, wherein transfer of the provided information including information to the navigation device is started.   The transfer unit includes the optical beacon roadside communication device having the same provided information included in the infrared signal received by the receiving unit based on whether or not the infrared signal is not received by the receiving unit for a predetermined time or more. The in-vehicle communication device for an optical beacon according to any one of claims 1 to 3, wherein it is determined whether or not the provision information is received from the communication device. The provided information included in the infrared signal includes an identifier of the roadside communication device for the optical beacon that has transmitted the infrared signal,
The transfer unit determines whether the provided information included in the infrared signal received by the receiving unit is the provided information received from the same optical beacon roadside communication device, based on the identifier. The in-vehicle communication device for optical beacons according to any one of claims 1 to 4.   When the reception unit starts receiving the infrared signal from the new optical beacon roadside communication device, the transfer unit sets the transfer restriction state of the provided information to the navigation device to an unrestricted state. The in-vehicle communication device for an optical beacon according to any one of claims 1 to 5, which is returned.   The optical transfer beacon according to any one of claims 1 to 6, wherein the transfer unit is configured to transfer information of a type set by the navigation device among provided information included in the infrared signal. In-vehicle communication device. In-vehicle communication device for optical beacons,
A navigation device,
The in-vehicle communication device for the optical beacon is
A receiver for receiving an infrared signal from the roadside communication device for optical beacons;
A transfer unit that acquires provision information included in the infrared signal received by the receiving unit and transfers the information to the navigation device;
The transfer unit includes a transfer restriction unit that restricts transfer of the same type of information to the navigation device that is information transmitted from the same optical beacon roadside communication device among the provided information ,
The in-vehicle device, wherein the transfer restriction unit includes a providing source determination unit that determines whether the provision information acquired by the transfer unit is information transmitted from the same optical beacon roadside communication device.

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