JP2008108034A - Communication system, traffic light controller and system operation management device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication system wherein information is wirelessly provided from a traffic light controller to a vehicle, allowing decisions of whether the provided information is normal or not. <P>SOLUTION: In this communication system, the traffic light controller 3A is connected with a first communication antenna 4Aa for wirelessly transmitting communication data to the vehicle, and the communication data including information related to a light control plan are transmitted to a road (a) through the first communication antenna 4Aa. The communication data transmitted to the road (a) are received by the vehicle when the vehicle is present in a communication area (a), and is also received by an on-road communication device 1Aa through a second communication antenna 2Aa installed in the communication area (a) regardless of presence/absence of the vehicle. The on-road communication device 1Aa decides whether contents of the received communication data are normal or not, and notifies the other device about a result of the decision. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a communication system configured by a traffic signal controller that wirelessly transmits communication data to a vehicle and a road communication device that receives the communication data.

In recent years, for the purpose of promoting traffic safety and preventing traffic accidents, systems that improve the safety of vehicles by receiving information from infrastructure devices installed on the road and utilizing the information have been studied. .
As such a system, for example, a safe driving support system is proposed in which operation information of a traffic light is wirelessly transmitted to a vehicle, and the vehicle performs brake control according to a remaining display time of a green signal included in the operation information ( Patent Document 1).

Japanese Patent No. 2806801

  Since the vehicle in the safe driving support system performs brake control based on the operation information of the traffic signal received from the traffic signal controller or the like, if there is an error in the operation information, the content of the operation information is correct. There is a case where the brake control functioning on the premise is not properly performed, and there is a possibility that the safety of the vehicle traveling is lowered.

  Therefore, since the reliability of the operation information is extremely important, it is desirable to periodically monitor whether or not the operation information having the correct contents is sent in order to improve safety.

  Therefore, in the present invention, when information is provided to a vehicle from a traffic signal controller or the like wirelessly, the road communication device capable of receiving the information determines whether the information provided by the traffic signal controller is normal. It is an object of the present invention to provide a system capable of determining the above.

  The communication system of the present invention includes a traffic signal controller installed at an intersection and transmitting communication data to a vehicle traveling on a road, and a road communication device installed at a position where the communication data can be received, The road communication device includes: a receiving unit that receives the communication data from the traffic signal controller; a communication data determining unit that determines whether the received communication data is normal; and the determination result of the determination to another device. It has a notification means to notify to (claim 1).

According to the present invention, it is determined whether or not the communication data transmitted by the traffic signal controller has normal contents, and the result of the determination is notified to other devices. Can be monitored.
In addition, since it is possible for the operator of the other device to grasp and deal with the occurrence of an abnormality, the state in which erroneous information is transmitted to the vehicle can be kept in a short period of time, and the reliability of the communication data Can be increased.

  The road communication device according to the present invention includes static information extraction means for extracting static information, which is information whose contents do not change with time, from the communication data, and information referred to in the determination of the static information. Static communication information acquisition means for acquiring static reference information, wherein the communication data determination means determines whether the communication data is normal based on the extracted static information and the acquired static reference information (Claim 2).

  In the present invention, the static information is at least one of road shape information relating to the shape of the road and traffic restriction information relating to traffic restriction of the road.

  Further, the road communication device according to the present invention includes a dynamic information extraction unit that extracts dynamic information, which is information whose contents change with time, from the communication data, and information that is a basis for the determination of the dynamic information. Dynamic basic information acquisition means for acquiring dynamic basic information, wherein the communication data determination means determines whether the communication data is normal based on the extracted dynamic information and the acquired dynamic basic information. It is characterized by determining whether or not (Claim 4).

  The road communication device according to the present invention predicts dynamic information after a predetermined time based on the acquired basic information, and acquires dynamic prediction information that is information created as a result of the prediction. It has an information acquisition means, The communication data determination means determines whether the communication data is normal based on the extracted dynamic information and the acquired dynamic prediction information (claim) Item 5).

  The dynamic information according to the present invention is at least one of signal information related to signal lamp color display of the traffic signal controller and time information related to time.

  According to these inventions, in determining whether or not the content of communication data transmitted by the traffic signal controller is normal, static information and dynamic information included in the communication data are extracted, and for each of these pieces of information, Since the determination is made according to the characteristic of whether the information changes with the passage of time, it is possible to accurately monitor whether the system is operating normally.

  Here, static information is information whose contents do not change with the passage of time, and dynamic information is information whose contents change with the passage of time. Examples of the static information include road shape information related to the shape of the road. The road shape information is information including, for example, the distance from a point upstream of the intersection to the stop line, the number of road lanes, the road gradient, and the like. The road shape information is static information because it does not change with time except when the road shape changes due to construction or the like. Information relating to road traffic regulations is also static information. For example, the fact that speed regulation is performed in a specific time zone does not change with time.

  Examples of the dynamic information include current time information and signal information related to signal lamp color display. The current time information is information representing the current time, and it goes without saying that it varies from moment to moment. The signal information is information including the display color of the current signal lamp color and the duration thereof, the future display color and the duration thereof, and the like, which varies with the passage of time. Examples of the dynamic information include other information detected by sensors, such as pedestrian information and road surface state information.

  In addition, the determination result notified by the notification unit according to the present invention includes at least one of an abnormality information type related to the type of information determined to be abnormal by the communication data determination unit and abnormal content information regarding the content of the abnormality. (Claim 7).

  According to the present invention, the determination result by the communication data determination means stores not only the normal or abnormal state but also the type of abnormal information and the content of the abnormality. The notified device or person can grasp the details of the system abnormality.

The road communication device according to the present invention is used in the communication system (claim 8).
In addition, a traffic signal controller according to the present invention includes the road communication device (claim 9).

  In addition, the system operation management device according to the present invention includes: a receiving unit that receives the determination result from at least one of the road communication device and the traffic signal controller; and a traffic signal control that is determined to be abnormal in the determination result. And an instruction means for instructing the machine to stop transmission of the information determined to be abnormal (claim 10).

  According to this invention, in order to identify the traffic signal controller determined to be abnormal and instruct the traffic signal controller to stop transmitting information, the state in which erroneous information is transmitted to the vehicle is determined. It can be kept in a short period of time, and the safety of the communication system can be improved.

As described above, according to the communication system and the traffic signal controller of the present invention, it is possible to determine whether or not the information transmitted from the traffic signal controller to the vehicle is normal, and the reliability of the transmission information. Can be increased.
Further, according to the system operation management apparatus of the present invention, it is possible to stop the transmission of information of the traffic signal controller in which the information transmitted from the traffic signal controller to the vehicle is determined to be abnormal. Can increase the sex.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic diagram showing an outline of equipment arrangement of a communication system according to the present invention, which includes a traffic signal controller and a road communication device.

On the road a connected to the intersection A, a stop line a is drawn before the intersection A.
A traffic signal controller 3A is installed at the intersection A, and a vehicle (not shown) traveling toward the intersection A by turning on, turning off, and blinking each signal lamp color of the signal lamp including the signal lamp 5Aa. The right of traffic is displayed.

  The traffic signal controller 3A is connected to a first communication antenna 4Aa for wirelessly transmitting communication data to the vehicle, and the communication data is transmitted from the first communication antenna 4Aa toward the road a. A vehicle (not shown) traveling on the road a receives the communication data transmitted from the first communication antenna 4Aa in the communication area a (a range indicated by hatching in the figure).

  On the other hand, a road communication device 1Aa is installed near the intersection A, and receives communication data from the traffic signal controller via the second communication antenna 2Aa. In this case, the second communication antenna 2Aa may be installed at any position within the communication area a where the communication data transmitted from the first communication antenna 4Aa can be received.

  FIG. 2 is a diagram showing an example of a system configuration showing an overall configuration of a traffic control system including a plurality of communication systems according to the present invention.

  The traffic signal controller 3A determines a signal control plan based on a signal control command from the signal control device 6 installed in the traffic control center, and lights each signal lamp color of the signal lamp unit based on the signal control plan. It has a function. The traffic signal controller 3A controls the signal lamps 5Aa and 5Ab. In this case, any number of signal lamps may be connected. Further, the traffic signal controller 3A may not operate based on an instruction from the signal control device 6, may operate in cooperation with another traffic signal controller (not shown), The traffic signal controller 3A may operate based on a constant or the like that is stored in advance in a storage unit or the like. The signal control command reaches the traffic signal controller 3A via the central router 8, the communication line A, and the terminal router 9A.

  Further, the traffic signal controller 3A transmits communication data including information on the determined signal control plan to the road a via the first communication antenna 4Aa. The communication data transmitted to the road a is received by the vehicle when there is a vehicle in the communication area a, but the second communication antenna 2Aa installed in the communication area a is used regardless of the presence or absence of the vehicle. Via the road communication device 1Aa.

  Then, the road communication device 1Aa that has received the communication data determines whether or not the communication data is normal, and transmits the determination result to the system operation management device 7. The determination result reaches the system operation management apparatus 7 installed in the traffic control center via the terminal router 9A, the communication line A, and the central router 8. In this case, the determination result may pass through a terminal router (not shown) other than the terminal router 9A or a communication line (not shown) other than the communication line A.

  Similarly, on another road b (not shown) connected to the intersection A, the traffic signal controller 3A transmits communication data to the road b via the first communication antenna 4Ab. The communication data transmitted to the road b is received by the vehicle when there is a vehicle in the communication area b, but the second communication antenna installed in the communication area b regardless of the presence or absence of the vehicle. It is also received by the road communication device 1Ab via 2Ab.

  The roadside communication device 1Ab that has received the communication data determines whether or not the communication data is normal, and manages the determination result via the terminal router 9A, the communication line A, and the central router 8. Transmit to the device 7.

  As described above, the traffic signal controller 3A transmits the communication data to the road connected to the intersection A via the first communication antenna 4Aa, but the road on which the first communication antenna 4Aa transmits the communication data is 1 There may be one or more. The traffic signal controller 3A may have a plurality of first communication antennas for transmitting communication data. In this case, the communication data transmitted from each of the first communication antennas may have the same content. In addition, individual information corresponding to the road on which the communication data is transmitted may be included.

  Moreover, the road communication apparatus which receives the said communication data which traffic signal controller 3A transmits may be one, and plural may be sufficient as it. Further, it is not necessary to have one road communication device for each second communication antenna. A plurality of second communication antennas are connected to one road communication device, and the traffic signal controller 3A transmits to a plurality of roads. It may be determined whether the communication data to be transmitted is normal.

Note that the road communication devices 1Aa and 1Ab may transmit the determination result to the traffic signal controller 3A, or the road signal communication device 3A may be built in the road communication device 1Aa or 1Ab.
That is, the traffic signal controller itself that transmits communication data may be configured to include a road communication device in order to self-diagnose the correctness of the communication data.

  Next, the road communication device 1Aa receives the communication data transmitted by the traffic signal controller 3A to the road a via the second communication antenna 2Aa and determines whether the communication data is normal or not. 3 will be described in detail with reference to the functional block configuration of the roadside communication device 1Aa shown in FIG. 3 and the flowcharts shown in FIG. 7, FIG. 9, and FIG.

  The receiving means 101 receives communication data from the traffic signal controller 3A via the second communication antenna 2Aa. In this case, the received communication data includes at least one of static information and dynamic information.

  An example of the format of communication data is shown in FIG. The communication data includes a header part, a data part, and a footer part, and the data part includes a plurality of pieces of information. Each of the plurality of pieces of information in the data portion includes a subheader portion and a subdata portion.

  Next, an example of communication data is shown in FIG. In FIG. 4B, the header portion stores a field indicating the start address of communication data, the size of the entire communication data, and the number of information types included in the communication data. The subheader section stores an identifier indicating each information type and an information size of each information type. In the sub data part, information of the information type indicated in the sub header part is stored. Finally, the CRC of the entire communication data is stored in the footer section. The communication data may have a structure other than that of this embodiment.

  The static information extraction unit 131 extracts static information from the received communication data (step S301). Specifically, according to the number of information types stored in the header part, the identifier of each information type is sequentially acquired from the subheader part, and when the acquired identifier corresponds to static information, subsequent information The information content of the sub data part is extracted based on the size. As to whether or not it corresponds to static information, refer to the static / dynamic information classification table 132 (FIG. 5) that stores whether it corresponds to static information or dynamic information for each identifier. The determination is made based on the acquired identifier.

  Further, the static reference information acquisition unit 141 acquires reference information related to static information (step S302). The reference information here is information indicating the contents of all or part of each static information to be stored in the communication data received from the traffic signal controller 3A by the road communication device 1Aa. The reference information may be stored in advance in storage means (not shown) of the road communication device 1Aa, and the static reference information acquisition means 141 may acquire from the storage means (not shown). Alternatively, a method of obtaining from other devices such as the signal control device 1 and the system operation management device 7 by communication may be used.

  Then, the communication data determination unit 111 compares the static information extracted by the static information extraction unit 131 with the reference information about the acquired static information (step S303), and whether the contents match. Whether or not the content of the static information is normal is determined based on whether or not (step S304).

  For example, consider the case where the static information is road shape information, and the reference information includes four items as shown in FIG.

  When the road shape information extracted by the static information extraction unit 131 is as shown in FIG. 6B, the communication data determination unit 111 selects a road from the head of the sub-data portion of the extracted road shape information. The link number (08), the link length (C8), the number of lanes (04), and the gradient (02) for identification are acquired and compared with the corresponding data in the reference information. In this case, since all of the extracted road shape information data matches the reference data of the reference information, the road shape information is determined to be normal.

  On the other hand, when the road shape information extracted by the static information extraction unit 131 is as shown in FIG. 6C, the communication data determination unit 111 starts from the head of the sub-data portion of the extracted road shape information. A link number (08), a link length (64), a lane number (05), and a gradient (02) for identifying a road are acquired and compared with each corresponding data in the reference information. In this case, since the link length and the number of lanes in the extracted road shape information data are different from the reference data of the reference information, the road shape information is determined to be abnormal.

  The determination result by the communication data determination unit 111 obtained in this way is notified to other devices such as the system operation management device 7 by the notification unit 121 (step S305). In this case, the determination result is notified in association with the information type of the road shape information to be determined. Preferably, in addition to the information type, items (link length and number of lanes) that differ from the reference data are also associated and notified at the same time. By doing so, it is possible to quickly detect which item of which information type is abnormal, and it becomes easy to analyze and readjust the system.

  On the other hand, the dynamic information extraction unit 151 extracts dynamic information from the received communication data (step S501). The method for extracting dynamic information is the same as that for extracting static information.

  The dynamic basic information acquisition unit 161 acquires basic information related to dynamic information (step S502). The basic information referred to here is information that is necessary for the road communication device 1Aa to specify all or part of the dynamic information to be stored in the communication data received from the traffic signal controller 3A. . The basic information may be stored in advance in storage means (not shown) of the road communication device 1Aa and acquired from the storage means (not shown), or the signal control device 1 or system may be used. A method of obtaining from other devices such as the operation management device 7 by communication may be used.

  Then, the communication data determination unit 111 determines whether or not the content of the dynamic information is normal based on the dynamic information extracted by the dynamic information extraction unit 151 and the basic information about the acquired dynamic information. Is determined (steps S503 to S508).

  For example, consider the case where the dynamic information is signal information and the basic information is composed of 13 items as shown in FIG. In the basic information shown here, the number of signal lamp colors in one cycle in which the display of the traffic signal at the intersection makes a round is first stored (04), and the data relating to each display lamp color is stored in the subsequent area. Stored for the number of colors.

  First, a code (01) indicating a green signal is stored as the first indicator lamp color, and a minimum time (0A) and a maximum time (3C) for displaying the green signal are stored. In FIG. 8, as an example, the number of seconds is expressed in hexadecimal. That is, a blue signal is first displayed at the beginning of the cycle, and the display time of the green signal is in the range of 10 to 60 seconds.

  Similarly, the second indicator light color is a yellow signal (02), the display time is in the range of 5 to 10 seconds, and the third indicator light color is both a right turn blue arrow and a red signal (13) displayed. The time is in the range of 5 to 20 seconds, the fourth indicator lamp color is a red signal (03), and the display time is in the range of 60 to 80 seconds.

  Next, consider the case where the signal information stored in the communication data received by the receiving means 101 has a structure as shown in FIG. In the sub-data portion of the signal information shown here, the number of lamp colors (03) to be provided by the traffic signal controller 5A to the vehicle is first stored, and each display lamp color is displayed in the subsequent area. The expected duration is stored for the number of lamp colors.

  As the indicator lamp color 1, first, a code (01) indicating a green signal is stored, and a scheduled duration (16) in which the green signal is displayed is stored. In FIG. 8, as an example, the number of seconds is expressed in hexadecimal. That is, the green light is currently displayed on the signal lamp 5Aa, and the duration of the green signal is 22 seconds.

  Similarly, the lamp color scheduled to be displayed next to the blue signal is the yellow signal (02) shown in the display lamp color 2, and this yellow signal continues for 8 seconds, and further the lamp color scheduled to be displayed next. Is both a right turn blue arrow and a red signal (13) shown in the indicator lamp color 3, and expresses that the display continues for 10 seconds.

  In the signal information, the scheduled duration of the indicator lamp color 1 is decreased every moment, and when it becomes zero, it is replaced with the scheduled duration of the next indicator lamp color 2. At the same time, the display lamp color 1 is also replaced with the next display lamp color 2. Then, the subsequent display lamp colors 2 and 3 and the information related to the expected duration are also replaced.

First, the communication data determination unit 111 determines whether or not the display order of the lamp colors is appropriate for the data relating to the three lamp colors acquired from the signal information (step S503).

In the basic information, it is known that after the blue signal, the yellow signal, the right turn blue arrow and the red signal, and the red signal are displayed in this order, so that the display order of the acquired signal information is consistent and can be determined to be normal. (Step S504).

  Next, the communication data determination unit 111 determines the maximum display seconds (hereinafter referred to as T1) of each display lamp color included in the basic information, and the expected duration of each display lamp color acquired from the signal information ( Hereinafter, T2 is compared (step S505). If T2 is equal to or less than T1, it is determined to be normal, otherwise it is determined to be abnormal (step S506). Steps S505 and S506 are repeated for the number of information providing lamp colors stored in the signal information. Here, it can be determined that the blue signal, the yellow signal, the right turn blue arrow, and the red signal scheduled duration of the acquired signal information are normal because they are smaller than the maximum display seconds included in the basic information (step S506). ).

  Further, the communication data determination unit 111 includes the minimum display seconds (hereinafter referred to as T3) of each display lamp color included in the basic information, and the expected continuous seconds (hereinafter referred to as T3) of each display lamp color obtained from the signal information. , T4) (step S507). If T4 is equal to or greater than T3, it is determined to be normal, and if not, it is determined to be abnormal (step S508).

  Since the display lamp color (1) is the lamp color currently displayed, the scheduled duration of the lamp color may already be less than the minimum display seconds, so the display lamp color ( For step 1), steps S507 and S508 are not performed. Steps S507 and S508 are repeatedly executed for each display lamp color stored in the signal information except for the display lamp color (1). Here, since the yellow signal of the acquired signal information and the planned duration of the right turn blue arrow and the red signal are respectively larger than the minimum display number of seconds included in the basic information, it can be determined to be normal (step S508).

  On the other hand, when the signal information extracted by the dynamic information extraction unit 151 is as shown in FIG. 8C, the communication data determination unit 111 performs abnormal processing by processing the extracted signal information in the same manner as described above. Can be detected. In this case, since the display order of the signal information is changed from the yellow signal to the red signal, and the right turn blue arrow and the red signal are not displayed, it is determined that the signal information is abnormal (steps S503 and S504). .

  The determination result by the communication data determination unit 111 obtained in this way is notified to other devices such as the system operation management device 7 by the notification unit 121 (step S509). In this case, the determination result is notified in association with the information type of the signal information to be determined. Preferably, in addition to the information type, determination procedures and determination items determined to be abnormal are also associated and notified at the same time. For example, when the signal information as shown in FIG. 8C is determined, information indicating that an abnormality has been detected in the procedure for determining the display order is notified together with the determination result. In this way, it is possible to accurately grasp what kind of abnormality has occurred, so that it becomes easy to analyze and readjust the system.

Furthermore, the dynamic prediction information acquisition unit 171 uses the basic information acquired by the dynamic basic information acquisition unit 161 and the dynamic information extracted by the dynamic information extraction unit 151 to predict prediction information about the dynamic information. Create
The prediction information here refers to information created by predicting the contents of dynamic information at a future time point (for example, after 3 seconds) after a predetermined time has elapsed from the present time.

  Then, the communication data determination unit 111 includes the prediction information about the acquired dynamic information, the dynamic information extracted by the dynamic information extraction unit 151 from the communication data received at a future time corresponding to the prediction information, And whether or not the content of the dynamic information is normal is determined based on whether or not the content matches.

  For example, consider the case where the dynamic information is current time information. At a certain point in time, for example, when current time information “October 10, 2006 11:11:11” is received, the dynamic prediction information acquisition unit 171 receives, for example, “October 2006” as prediction information after 10 seconds. 10th 11:11:21 "is created and stored in the storage means (not shown), and the system waits until the counter value by the clock timer (not shown) changes by 10 seconds. Then, after 10 seconds have elapsed, the communication data determination unit 111 is notified of a determination start signal.

  Then, the communication data determination unit 111 notified of the determination start signal, the current time information extracted by the dynamic information extraction unit 151 from the communication data received at the time of the notification, and the storage unit (not shown). If the contents match, the current time information is determined to be normal, and if they do not match, it is determined to be abnormal. The result of the determination is notified to other devices such as the system operation management device 7 by the notification means 121.

  As described above, when determining whether or not the dynamic information is normal, one or both of a method of judging from only the content of the information received at a certain time point and a method of judging from the temporal change of the predicted information Can be used. By using these methods in combination according to the contents of information, it becomes possible to make a more accurate determination.

  Preferably, the road communication device 1Aa is built in a traffic signal controller 3B installed at an adjacent intersection. Compared with the case where the on-road communication device 1Aa is installed on the road as a separate casing, it is superior in aesthetics, and is advantageous in terms of construction cost, ease of maintenance, and the like. For example, when there is a geographical relationship as shown in FIG. 11, the information transmitted to each road from the traffic signal controller 3A installed at the intersection A is the traffic signal installed at the adjacent intersections B to E. It is determined whether the content received by the road communication device built in the controllers 3B to 3E is normal. In this way, adjacent traffic signal controllers determine whether the content of information transmitted to each other is normal, so that the safety of the system can be achieved without newly installing a road communication device as another device. And can improve reliability.

  In addition, the system operation management apparatus 7 notified of the determination result includes, for example, a display unit (not shown) that displays a map, and at a point where the traffic signal controller determined to be abnormal is installed, By superimposing and displaying characters or symbols indicating the abnormality, it is possible to notify the operator of the traffic control center of the occurrence of the abnormality and the installation point of the traffic signal controller that is abnormal. Further, the system operation management device 7 has an abnormality content analysis means (not shown) for analyzing and grasping the content of the abnormality, and for the traffic signal controller determined to be abnormal according to the content, An instruction can be given to stop sending information.

  In addition, when the traffic signal controller is repaired or the like and returned to a normal state after giving the cancellation instruction, normal return information indicating that the traffic signal controller has returned to normal is sent to the system operation management device 7. In response to the reception of the normal return information, the system operation management apparatus 7 may instruct the traffic signal controller to resume the transmission of information.

  Further, when the determination result is transmitted to the traffic signal controller itself, the traffic signal controller automatically stops transmission of communication data when the determination result becomes abnormal. Anyway.

  As an analysis / instruction method by the abnormality content analysis means, for example, when the type of information that is abnormal is signal information, the transmission of information is immediately stopped. On the other hand, the type of information that is abnormal is speed regulation information.For example, when the speed value is lower than the true value, it is on the safe side, so transmission should not be stopped immediately. No, continue for the time being. Then, when the abnormality continues for a predetermined period or longer, an instruction is given to stop transmission for the first time. In this way, according to the type and item of information that is abnormal, the period of abnormality, etc., it is determined whether or not the abnormality content analysis means stops the transmission of information by the traffic signal controller. By sending an instruction according to the result of the determination, the reliability of the system can be improved.

(Second Embodiment)
In the first embodiment, the traffic signal controller itself transmits signal information and the like wirelessly to the vehicle. However, a road device (not shown) for transmitting the signal information and the like is separately installed. Then, signal information or the like may be transmitted via the road device. In this case, the road device may receive signal information and the like of each traffic signal controller from a plurality of traffic signal controllers, and collectively transmit them to a predetermined area.
Thus, when it is set as the structure which transmits information with respect to a predetermined area collectively, the road communication apparatus is installed in any point in the said area, and the said road communication apparatus is the said transmitted information. It may be determined whether or not the content of the information is normal.

  Note that the road communication device, the traffic signal controller, and the system operation management device according to the present invention may be realized by a single casing or a plurality of casings. Each of these may be realized by one computer or may be realized by combining a plurality of computers.

  The embodiment disclosed this time 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.

It is a schematic diagram which shows the outline | summary of apparatus arrangement | positioning of the communication system which concerns on this invention. 1 is a diagram showing an example of a system configuration showing an overall configuration of a traffic control system including a plurality of communication systems according to the present invention. It is a figure which shows an example of the functional block structure of roadside communication apparatus 1Aa. (A) is a figure which shows an example of a format of communication data, (b) is a figure which shows an example of communication data, (c) is a figure which shows an example of communication data. It is a figure which shows an example of a static / dynamic information classification table. (A) is a figure which shows an example of the reference information of road shape information, (b) is a figure which shows an example of road shape information, (c) is a figure which shows an example of road shape information. It is a flowchart which shows the procedure of the determination process of static information. (A) is a figure which shows an example of the basic information of signal information, (b) is a figure which shows an example of signal information, (c) is a figure which shows an example of signal information. It is a flowchart which shows the procedure of the determination process of signal information. It is a flowchart which shows the procedure of the determination process of signal information. It is a schematic diagram which shows the outline of arrangement | positioning of the traffic signal controller of this invention.

Explanation of symbols

1Aa, 1Ab Roadside communication devices 2Aa, 2Ab Second communication antennas 3A-3E Traffic signal controllers 4Aa, 4Ab First communication antennas 5Aa, 5Ab Signal lamp 6 Signal control device 7 System operation management device 8 Central router 9A, 9B Terminal router 101 Reception means 111 Communication data judgment means 121 Notification means 131 Static information extraction means 132 Static / dynamic classification table 141 Static reference information acquisition means 151 Dynamic information extraction means 161 Dynamic basic information acquisition means 171 Dynamic prediction information acquisition means

Claims (10)

A traffic signal controller installed at an intersection and transmitting communication data to a vehicle traveling on a road;
A communication system including a road communication device installed at a position capable of receiving the communication data,
The road communication device is
Receiving means for receiving the communication data from the traffic signal controller;
Communication data determination means for determining whether the received communication data is normal;
A communication system comprising a notification means for notifying the other apparatus of the determination result of the determination. The road communication device is
Static information extraction means for extracting static information, which is information whose contents do not vary with time, from the communication data;
Static reference information acquisition means for acquiring static reference information, which is information referred to in the determination of the static information,
The communication system according to claim 1, wherein the communication data determination unit determines whether the communication data is normal based on the extracted static information and the acquired static reference information. The static information is
The communication system according to claim 2, wherein the communication system is at least one of road shape information relating to the shape of the road and traffic restriction information relating to traffic restriction of the road. The road communication device is
Dynamic information extracting means for extracting, from the communication data, dynamic information that is information whose contents change with the passage of time;
Dynamic basic information acquisition means for acquiring dynamic basic information which is information serving as a basis in the determination of the dynamic information,
The communication system according to claim 1, wherein the communication data determination unit determines whether the communication data is normal based on the extracted dynamic information and the acquired dynamic basic information. The road communication device is
Dynamic prediction information acquisition means for predicting dynamic information after a predetermined time based on the acquired basic information and acquiring dynamic prediction information that is information created as a result of the prediction,
The communication system according to claim 4, wherein the communication data determination unit determines whether or not the communication data is normal based on the extracted dynamic information and the acquired dynamic prediction information. The dynamic information is
6. The communication system according to claim 4, wherein the communication system is at least one of signal information related to signal lamp color display of the traffic signal controller and time information related to time. The determination result notified by the notification means is:
7. The apparatus according to claim 1, comprising at least one of an abnormality information type related to a type of information determined to be abnormal by the communication data determination unit and an abnormality content information regarding the content of the abnormality. Communications system. A road communication device used in the communication system according to any one of claims 1 to 7. A traffic signal controller incorporating the roadside communication device according to claim 8. Receiving means for receiving the determination result from at least one of the road communication device according to claim 8 and the traffic signal controller according to claim 9;
Instructing the traffic signal controller determined to be abnormal in the determination result to instruct to stop transmission of information or to instruct to stop transmission of information determined to be abnormal System operation management device characterized by this.

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