JP6507448B2 - Line aggregation device, central device, traffic control system, traffic control method and program - Google Patents

Description

  The present invention relates to a line aggregation device, a central device, a traffic control system, a traffic control method, and a program, and in particular, a line used when exchanging communication data between a central apparatus and a terminal through the line aggregation device. The present invention relates to an aggregation device, a central device, a traffic control system, a traffic control method, and a program.

  2. Description of the Related Art A traffic control system is conventionally known for controlling traffic light controllers and providing vehicle information via light beacons by collecting, analyzing and transmitting information on road traffic. In a traffic control system, a network system using an IP (Internet Protocol) in a network layer of a so-called OSI reference model as a communication procedure has become widespread.

  Such a network system is standardized as a UD type transmission system. In addition, in a network system adopting a UD type transmission system, communication exchanged between a central unit installed in a traffic control center and a plurality of terminal devices including a traffic signal controller installed on a road or roadside As an apparatus for relaying data, for example, a UD type terminal line aggregation apparatus is standardized.

  Patent Document 1 discloses a UD type terminal line aggregation device for bypassing another communication line and relaying communication data even when a communication line is disconnected due to an accident or the like.

JP 2008-70996 A

  However, in the conventional line aggregation device, no preparation is made when the communication data can not be relayed by bypassing another communication line. In such a case, the traffic signal controller can not receive the signal control command information from the central unit, and it becomes difficult to operate the traffic signal controller in a desirable state, for example, when traffic congestion occurs.

  The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a line aggregation device and the like capable of operating a traffic signal controller in a desired state.

  (1) In order to achieve the above object, a line aggregation device according to an embodiment of the present invention includes a plurality of terminal devices including a traffic signal controller installed on a road or a roadside and a center installed in a traffic control center A line aggregation device for relaying communication data exchanged with the device through an aggregation line installed between the central device and the communication device, wherein the line aggregation device relays communication data between the plurality of terminal devices and the central device A plurality of communication units for transmitting and receiving the communication data and for transmitting and receiving the communication data to and from the other line aggregation apparatus capable of communicating with the line aggregation apparatus; A control unit for relaying the communication data exchanged between the terminal device and the central device, the control unit (i) being unable to communicate between the line aggregation device and the central device , And the other times The communication data is relayed via the other line aggregation device when the first condition that communication can be performed between the aggregation device and the central device is satisfied, and (ii) the line aggregation device and the central device From the terminal device of any of the plurality of terminal devices, provided that the second condition that communication can not be performed between any of the other line aggregation device and the central device is satisfied, The signal control command information for controlling the subordinate traffic signal controller connected to the line aggregation device is determined based on the information in the above, and the subordinate traffic signal controller is determined based on the determined signal control command information. Control.

  (10) A central apparatus according to another embodiment of the present invention is connected to a line aggregation device via an aggregation line, and a plurality of terminal devices including traffic signal controllers installed on the road or on the roadside A central apparatus installed in a traffic control center that exchanges communication data between the plurality of terminal devices via the line aggregation device, and exchanges the communication data with the plurality of terminal devices via the line aggregation device. And a control unit that exchanges the communication data with the plurality of terminal devices via the line aggregation device by controlling the communication unit, the control unit including: When communication can not be performed with the line aggregation device and communication can be performed with another line aggregation device capable of communicating with the line aggregation device, the line aggregation device may be connected via the other line aggregation device. Communication between To exchange chromatography data.

  (12) A traffic control system according to another embodiment of the present invention includes a central unit installed in a traffic control center, a plurality of terminal devices including a traffic signal controller installed on the road or the roadside, and the central device And a line aggregation device for relaying communication data exchanged between the plurality of terminals via the aggregation line provided between the central device and the line aggregation device, and the line aggregation device is configured to communicate with the plurality of terminal devices and the central portion. A communication unit that exchanges the communication data with the device and controls the communication unit to exchange the communication data with another line aggregation device that can communicate with the line aggregation device A control unit for relaying the communication data exchanged between the plurality of terminal devices and the central device, the control unit further comprising: (i) between the line aggregation device and the central device Communication is at And the first communication data can be communicated between the other line aggregation device and the central device, the communication data is relayed via the other line aggregation device, and (ii) the line Connected to the line aggregation device under the second condition that communication can not be performed in any of the aggregation device and the central device and between the other line aggregation device and the central device; The signal control command information for controlling the traffic signal controller under the control is determined, and the traffic signal controller under the control is controlled based on the determined signal control command information.

  (13) A traffic control method according to another embodiment of the present invention exchanges between a plurality of terminal devices including a traffic signal controller installed on the road or the roadside and a central device installed in the traffic control center. A traffic control method by means of a line aggregation device relaying communication data to be transmitted between the central device and the central device, communication between the line aggregation device and the central device can not be performed, and Relaying the communication data via the other line aggregation device when communication is possible between the central device and another line aggregation device capable of communicating with the line aggregation device; If communication can not be performed between any one of the aggregation device and the central device, and between the other line aggregation device and the central device, any one end of the plurality of terminal devices The signal control command information for controlling the subordinate traffic signal controller connected to the line aggregation device is determined based on the information from the device, and the subordinate traffic signal control is determined based on the determined signal control instruction information. And controlling the machine.

  (14) A program according to another embodiment of the present invention is exchanged between a plurality of terminal devices including a traffic signal controller installed on the road or the roadside and a central device installed in the traffic control center. A program for causing a computer to function as a line aggregation device for relaying communication data through the aggregation line installed between the central device and the communication device, comprising: A plurality of communication units for transmitting and receiving the communication data and for transmitting and receiving the communication data to and from the other line aggregation apparatus capable of communicating with the line aggregation apparatus; And causing the computer to function as a control unit for relaying the communication data exchanged between the terminal device and the central device, the control unit comprising (i) the line aggregation device and the control unit. The communication data is transmitted via the other line aggregation device when the first condition that communication with the central device can not be performed and the other line aggregation device can communicate with the central device is satisfied. And (ii) the second condition that communication can not be performed in any of the line aggregation device and the central device and between the other line aggregation device and the central device And determining the signal control command information for controlling the subordinate traffic signal controller connected to the line aggregation device based on the information from any one of the plurality of terminal devices. The traffic signal controller under control is controlled based on the signal control command information.

  The present invention can also be realized as a semiconductor integrated circuit that implements part or all of the line aggregation device or the central device.

  According to the present invention, the traffic light controller can be operated in a desired state.

It is a figure showing a schematic structure of a traffic control system concerning an embodiment of the invention. It is a figure which shows the structure of a central unit and a line aggregation apparatus. It is a figure which shows the flow of communication data in case an intensive line is normal and communication can be performed between a central unit and a line aggregation apparatus. It is a figure which shows the flow of communication data when a part of concentration line becomes abnormal. FIG. 5 is a diagram showing priorities regarding bandwidth. It is a figure which shows the flow of communication data when all the intensive lines are abnormal. It is a figure which shows the flow of communication data when a concentration line is restored. It is a flowchart which shows the flow of the process which a circuit | line aggregation apparatus performs. It is a flowchart which shows the flow of the process which a circuit | line aggregation apparatus performs. It is a figure which shows the priority of communication data. It is a flowchart which shows the flow of the process which a central unit performs.

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

  (1) A line aggregation device according to an embodiment of the present invention is exchanged between a plurality of terminal devices including a traffic signal controller installed on a road or a roadside and a central device installed in a traffic control center. A line aggregation device for relaying communication data through an aggregation line laid between the central device and the communication device, which exchanges the communication data with the plurality of terminal devices and with the central device. A communication unit that exchanges the communication data with another line aggregation device that can communicate with the line aggregation device, and the plurality of terminal devices and the central device by controlling the communication unit Control unit for relaying the communication data exchanged between the control unit and the control unit, and (i) the control unit can not communicate between the line aggregation device and the central device, and the other line aggregation device And the central unit Relays the communication data via the other line aggregation device when the first condition that communication can be performed between the two line aggregation devices, (ii) between the line aggregation device and the central device, and the other line The line aggregation is performed based on information from any one of the plurality of terminal devices when the second condition that communication can not be performed in any of the aggregation device and the central device is satisfied. Signal control command information for controlling a subordinate traffic signal controller connected to the device is determined, and the subordinate traffic signal controller is controlled based on the determined signal control command information.

  According to this configuration, when the second condition is satisfied, that is, even when communication data can not be relayed between the central apparatus and the terminal apparatus via another line aggregation device, a vehicle sensor The line aggregation device determines signal control command information for controlling the traffic signal controller using the information such as. For example, when traffic congestion is detected by the information of the vehicle sensor, it is possible to create signal control command information that eliminates traffic congestion. Therefore, even when communication data can not be relayed even through another communication line, the traffic signal controller can be operated in a desirable state.

  (2) When the second condition is satisfied, the control unit further controls the communication unit to control data used to control the traffic signal controller under the other line aggregation device. The traffic signal controller under the line aggregation device may be controlled based on the data received from the other line aggregation device and received.

  According to this configuration, when the second condition is satisfied, the signal control command information of the traffic signal controller under the other line aggregation device is acquired, or the information of the vehicle sensor under the other line aggregation device is acquired You can do it. Therefore, for example, the control unit can determine the signal control command information of the traffic signal controller subordinate to the line aggregation device so that the offset is synchronized with the traffic signal controller subordinate to the other line aggregation device. . As a result, it is possible to create signal control command information that eliminates traffic congestion, and to operate the traffic signal controller in a desirable state.

  (3) The control unit controls the signal control command information of the traffic signal controller transmitted from the central apparatus among the communication data, and sensing information of a vehicle traveling on the road transmitted from the terminal device. And may be relayed.

  According to this configuration, it is possible to relay signal control instruction information and sensing information that are important for control of the traffic signal controller prior to other information. Thus, the traffic light controller can be controlled as unobtrusively as possible, and the traffic light controller can be operated in a desired state.

  (4) The control unit relays the signal control command information by prioritizing relaying in a time zone other than the first time zone as relaying in a predetermined first time zone. May be

  According to this configuration, for example, by setting a time zone with a large traffic volume such as morning and evening rush hours as the first time zone, the traffic signal controller is controlled as little as possible in a time zone with a large traffic volume. be able to. Thus, the traffic signal controller can be operated in a desired state.

  (5) The line aggregation device can communicate with the plurality of other line aggregation devices, and the control unit is configured to, based on the priority related to the bandwidth of the other line aggregation device, when the first condition is satisfied. At least one of the plurality of other line aggregation devices may be selected, and the communication data may be relayed via the selected other line aggregation device.

  According to this configuration, communication data can be relayed via another line aggregation device having a sufficient bandwidth. Therefore, the communication data can not be made to pass through to another line aggregation device having no surplus bandwidth, and the communication data can be relayed while the influence on the communication of the other line aggregation device is minimized.

  (6) The line aggregation device can communicate with the plurality of other line aggregation devices, and the control unit is configured to, based on the priority related to the bandwidth of the other line aggregation device, when the first condition is satisfied. A distribution rate of communication data to a plurality of other line aggregation devices is determined, the communication data is distributed to a plurality of other line aggregation devices according to the determined distribution rate, and a plurality of the other line aggregation devices The communication data may be relayed through.

  According to this configuration, the communication data can be distributed according to the size of the bandwidth, and the communication data can be relayed via the plurality of other line aggregation devices. Therefore, it is possible to relay communication data of a larger amount of data as the other line aggregation devices having a margin in bandwidth and to reduce the data amount of communication data relayed by other line aggregation devices having no margin in the bandwidth. it can. Therefore, communication data can be relayed while minimizing the influence on communication of other line aggregation devices.

  (7) The priority may be determined according to the type and number of subordinate terminal devices connected to each of the other line aggregation devices.

  According to this configuration, the communication data is not transmitted at all to another line aggregation device to which a terminal device that communicates data of a large amount of data is connected or a large number of terminal devices are connected. It is possible not to transmit large communication data. Therefore, communication data can be relayed while minimizing the influence on communication of other line aggregation devices.

  (8) The above-mentioned line aggregation device further includes a storage unit for storing signal control execution information indicating an execution result of a traffic signal controller under the line aggregation device, and the control unit is configured to The signal control execution information is stored in the storage unit when communication can not be performed with the central unit, and is stored in the storage unit when communication between the line aggregation device and the central unit is restored. The signal control execution information may be transmitted to the central apparatus.

  According to this configuration, it is possible to transmit signal control execution information that could not be transmitted in real time to the central apparatus later. Therefore, in the central apparatus, the signal control execution information can be used for various statistical processes.

  (9) The control unit, when the communication unit has not received the communication data from the central apparatus via the other line aggregation device for a predetermined time, the other line aggregation It may be determined that no communication can take place between the device and the central device.

  According to this configuration, it can be determined whether communication can be performed between another line aggregation device and the central device by a simple method.

  (10) A central apparatus according to another embodiment of the present invention is connected to a line aggregation device via an aggregation line, and a plurality of terminal devices including traffic signal controllers installed on the road or on the roadside A central apparatus installed in a traffic control center that exchanges communication data between the plurality of terminal devices via the line aggregation device, and exchanges the communication data with the plurality of terminal devices via the line aggregation device. And a control unit that exchanges the communication data with the plurality of terminal devices via the line aggregation device by controlling the communication unit, the control unit including: When communication can not be performed with the line aggregation device and communication can be performed with another line aggregation device capable of communicating with the line aggregation device, the line aggregation device may be connected via the other line aggregation device. Communication between To exchange chromatography data.

  According to this configuration, even when communication data can not be exchanged with a plurality of terminal devices via the line aggregation device, communication data can be exchanged via another line aggregation device. it can. Therefore, it is possible to exchange the signal control command information of the traffic signal controller, the information of the vehicle sensor and the like, and to operate the traffic signal controller in a desired state.

  (11) The control unit can not communicate with the line aggregation device when it can communicate with the line aggregation device and falls under a predetermined second time zone. Signal control execution information indicating the accumulated execution results of the traffic signal controller under the line aggregation device may be acquired from the line aggregation device.

  According to this configuration, by setting a time zone with a low traffic volume such as midnight as the second time zone, the signal from the line aggregation device is avoided while avoiding a time zone in which there is no margin in the bandwidth of the aggregation line such as morning and evening rush hours. Control execution information can be acquired. For this reason, the signal control execution information can be acquired without interrupting the communication of the important information such as the signal control command information of the traffic signal controller.

  (12) A traffic control system according to another embodiment of the present invention includes a central unit installed in a traffic control center, a plurality of terminal devices including a traffic signal controller installed on the road or the roadside, and the central device And a line aggregation device for relaying communication data exchanged between the plurality of terminals via the aggregation line provided between the central device and the line aggregation device, and the line aggregation device is configured to communicate with the plurality of terminal devices and the central portion. A communication unit that exchanges the communication data with the device and controls the communication unit to exchange the communication data with another line aggregation device that can communicate with the line aggregation device A control unit for relaying the communication data exchanged between the plurality of terminal devices and the central device, the control unit further comprising: (i) between the line aggregation device and the central device Communication is at And the first communication data can be communicated between the other line aggregation device and the central device, the communication data is relayed via the other line aggregation device, and (ii) the line Connected to the line aggregation device under the second condition that communication can not be performed in any of the aggregation device and the central device and between the other line aggregation device and the central device; The signal control command information for controlling the traffic signal controller under the control is determined, and the traffic signal controller under the control is controlled based on the determined signal control command information.

  According to this configuration, it has the same configuration as the line aggregation device shown in (1). Therefore, the same operation and effect as the line aggregation device shown in (1) can be exhibited.

  (13) A traffic control method according to another embodiment of the present invention exchanges between a plurality of terminal devices including a traffic signal controller installed on the road or the roadside and a central device installed in the traffic control center. A traffic control method by means of a line aggregation device relaying communication data to be transmitted between the central device and the central device, communication between the line aggregation device and the central device can not be performed, and Relaying the communication data via the other line aggregation device when communication is possible between the central device and another line aggregation device capable of communicating with the line aggregation device; If communication can not be performed between any one of the aggregation device and the central device, and between the other line aggregation device and the central device, any one end of the plurality of terminal devices The signal control command information for controlling the subordinate traffic signal controller connected to the line aggregation device is determined based on the information from the device, and the subordinate traffic signal control is determined based on the determined signal control instruction information. And controlling the machine.

  According to this configuration, the processing corresponding to the line aggregation device shown in (1) is executed. Therefore, the same operation and effect as the line aggregation device shown in (1) can be exhibited.

  (14) A program according to another embodiment of the present invention is exchanged between a plurality of terminal devices including a traffic signal controller installed on the road or the roadside and a central device installed in the traffic control center. A program for causing a computer to function as a line aggregation device for relaying communication data through the aggregation line installed between the central device and the communication device, comprising: A plurality of communication units for transmitting and receiving the communication data and for transmitting and receiving the communication data to and from the other line aggregation apparatus capable of communicating with the line aggregation apparatus; And causing the computer to function as a control unit for relaying the communication data exchanged between the terminal device and the central device, the control unit comprising (i) the line aggregation device and the control unit. The communication data is transmitted via the other line aggregation device when the first condition that communication with the central device can not be performed and the other line aggregation device can communicate with the central device is satisfied. And (ii) the second condition that communication can not be performed in any of the line aggregation device and the central device and between the other line aggregation device and the central device And determining the signal control command information for controlling the subordinate traffic signal controller connected to the line aggregation device based on the information from any one of the plurality of terminal devices. The traffic signal controller under control is controlled based on the signal control command information.

  According to this configuration, it has the same configuration as the line aggregation device shown in (1). Therefore, the same operation and effect as the line aggregation device shown in (1) can be exhibited.

[Details of the Embodiment of the Present Invention]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The embodiments described below all show one preferable specific example of the present invention. Numerical values, shapes, materials, components, arrangement positions and connection forms of components, steps, order of steps, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. The invention is specified by the claims. Therefore, among the components in the following embodiments, components that are not described in the independent claim showing the highest concept of the present invention are not necessarily required to achieve the object of the present invention, It is described as constituting a preferred embodiment.
Note that at least a part of the embodiments described below may be arbitrarily combined.

Embodiment
[1. Overall configuration of traffic control system]
FIG. 1 is a diagram showing a schematic configuration of a traffic control system according to an embodiment of the present invention.
The traffic control system 1 is a system for integrally performing commands such as operation of a traffic light or provision of information to the vehicle 60 by collecting, analyzing and transmitting information on road traffic. The traffic control system 1 includes a central unit 10, a line aggregation device 20, a traffic signal controller 31, an ultrasonic vehicle sensor 32, a light beacon 33, an imaging vehicle sensor 34, and an integrated line 40. , And the terminal line 50.

  The central apparatus 10 is a computer provided in a traffic control center, and is connected to a line aggregation device 20 described later via an aggregation line 40. The aggregation line 40 is disposed between the line aggregation device 20 and the central unit 10, and is configured by a wired or wireless analog line or a digital line such as wide area Ethernet ("Ethernet" is a registered trademark).

  The central unit 10 exchanges communication data with the terminal devices such as the traffic signal controller 31, the ultrasonic type vehicle sensor 32, the light beacon 33 and the image type vehicle sensor 34 via the integrated line 40 to control the traffic signal. Information for controlling the aircraft 31 (hereinafter referred to as “signal control command information”) is transmitted to the traffic signal controller 31. For example, the central unit 10 changes the split to lengthen the green light of the road where traffic congestion is occurring, based on the sensing information of the vehicle acquired from the ultrasonic vehicle sensor 32 or the imaging vehicle sensor 34. Signal control command information is transmitted to the traffic signal controller 31. The signal control command information includes information such as split, offset, cycle length and the like.

  In addition, the central unit 10 sends information provided to the vehicle 60 via the line aggregation device 20 to the vehicle 60 via the light beacon 33 such as traffic information (hereinafter referred to as “light beacon provision information”) to the light beacon 33, The ID (identifier) information (hereinafter referred to as "vehicle ID information") of the vehicle 60 can be received from the light beacon 33 via the line aggregation device 20 or the like.

  The line aggregation device 20 is installed on the road or road side such as the road R, and relays communication data exchanged between a plurality of terminal devices including the traffic signal controller 31 and the central device 10 through the integrated line 40. The line aggregation device 20 is installed, for example, at each major intersection, and is connected to a plurality of terminal devices installed at the intersection and a plurality of terminal devices installed at nearby intersections of the intersection.

  The terminal device is installed on the road or roadside such as the road R. The terminal device includes a traffic signal controller 31, an ultrasonic vehicle sensor 32, a light beacon 33, an imaging vehicle sensor 34, and the like. Each terminal device is connected to the line aggregation device 20 via the terminal line 50. The terminal line 50 is a self-owned line formed of a metal line or the like.

  The traffic signal controller 31 controls the lamp color of the signal light based on signal control command information including control parameters transmitted from the central apparatus 10. The data of the timetable which is the execution result of the traffic signal controller 31 is transmitted to the central apparatus 10 through the line aggregation device 20 as the signal control execution information.

  The ultrasonic vehicle sensor 32 is a sensor that projects an ultrasonic beam on a road surface and detects a blockage of a sound wave or beam reflected from the vehicle 60 to sense the vehicle 60. The ultrasonic vehicle sensor 32 transmits the sensing result as sensing information to the central apparatus 10 through the line aggregation device 20.

  The light beacon 33 is a device for performing two-way communication with the vehicle 60 by near-infrared communication, transmits the light beacon provision information received from the central apparatus 10 to the vehicle 60, The ID information is received, and the received vehicle ID information is sent to the central apparatus 10 via the line aggregation device 20.

  The image type vehicle sensor 34 picks up an image of a vehicle traveling on the road R with a camera unit installed on the roadside, detects an image of the obtained image by image processing, detects the velocity of the vehicle, the type of vehicle, etc. Measure the The image-type vehicle sensor 34 transmits the sensing result or the measurement result as sensing information to the central apparatus 10 via the line aggregation device 20.

[2. Configuration of central unit 10 and line aggregation device 20]
FIG. 2 is a diagram showing the configurations of the central unit 10 and the line aggregation device 20. As shown in FIG.
The central apparatus 10 includes a communication unit 11 and a control unit 12.
The communication unit 11 is connected to the line aggregation device 20 via the aggregation line 40, and exchanges communication data with a plurality of terminal devices 30 via the line aggregation device 20. That is, the communication unit 11 includes a communication interface that transmits and receives communication data. The terminal device 30 shown in FIG. 2 includes a traffic signal controller 31, an ultrasonic type vehicle sensor 32, a light beacon 33, and an image type vehicle sensor 34.

The control unit 12 controls the communication unit 11 to exchange communication data with the plurality of terminal devices 30 via the line aggregation device 20. That is, the control unit 12 transmits communication data to the terminal device 30 by controlling the communication unit 11, and receives communication data transmitted from the terminal device 30 to the line aggregation device 20 from the line aggregation device 20.
The line aggregation device 20 includes a communication unit 21, a control unit 22, and a storage unit 23.

  The communication unit 21 is connected to a plurality of terminal devices 30 via a terminal line 50, and exchanges communication data with the plurality of terminal devices 30. The communication unit 21 is also connected to the central apparatus 10 via the integrated line 40 to exchange communication data with the central apparatus 10.

  The communication unit 21 communicates with the line aggregation devices 20A and 20B, which are line aggregation devices capable of communicating with the line aggregation device 20, and exchanges communication data. The line aggregation device 20 and the line aggregation device 20A or the line aggregation device 20B may be connected by a wired private line such as a metal line, or may be connected by a wireless LAN (Local Area Network). That is, the communication unit 21 includes a communication interface that transmits and receives communication data. The line aggregation devices 20A and 20B have the same configuration as the line aggregation device 20. The line aggregation devices 20A and 20B are, for example, line aggregation devices installed at positions closest to the intersection where the line aggregation device 20 is installed. However, the installation positions of the line aggregation devices 20A and 20B are not limited, and the line aggregation devices 20A and 20B may be installed at any position as long as they can communicate with the line aggregation device 20.

  The control unit 22 controls the communication unit 21 to relay communication data exchanged between the plurality of terminal devices 30 and the central device 10. That is, the control unit 22 controls the communication unit 21 to transmit the communication data received by the communication unit 21 from the central apparatus 10 to the terminal device 30. Further, the control unit 22 controls the communication unit 21 to transmit the communication data received by the communication unit 21 from the terminal device 30 to the central apparatus 10.

  The storage unit 23 is a storage unit that stores communication data received from terminal information, and specifically stores signal control execution information, sensing information, and vehicle ID information.

[3. Processing by Traffic Control System 1]
[3-1. Normal operation]
FIG. 3 is a diagram showing a flow of communication data in the case where the aggregation line 40 is normal and communication can be performed between the central apparatus 10 and the line aggregation device 20.

  As shown in FIG. 3, when the integrated line 40 connecting the central apparatus 10 and the line aggregation apparatus 20 is normal, the central apparatus 10 transmits signal control command information to the line aggregation apparatus 20 through the integrated line 40 and Transmit light beacon provision information. The line aggregation device 20 receives signal control command information and light beacon provision information from the central device 10 via the aggregation line 40.

  The line aggregation device 20 transmits the received signal control command information to the subordinate traffic signal controller 31 connected to the line aggregation device 20. The traffic signal controller 31 executes control of the light color of the signal light based on the signal control command information.

  Further, the line aggregation device 20 transmits the received optical beacon provision information to the subordinate light beacons 33 connected to the line aggregation device 20. The light beacon 33 transmits light beacon provision information to the vehicle 60 traveling on the road R.

  The line aggregation device 20 also receives signal control execution information, sensing information, and vehicle ID information from the traffic signal controller 31, the ultrasonic vehicle sensor 32, and the light beacon 33 via the terminal line 50, respectively. The line aggregation device 20 transmits the received information to the central unit 10 via the aggregation line 40.

[3-2. When some central lines are abnormal]
FIG. 4 is a diagram showing the flow of communication data in the case where a part of integrated lines is abnormal. When some central lines are abnormal, the central line 40 is abnormal due to disconnection or the like, and communication between the central unit 10 and the line central unit 20 can not be performed, but the line central unit The case is shown where the integrated line 40A connecting 20A and the central apparatus 10 or the integrated line 40B connecting the line aggregation device 20B and the central apparatus 10 is normal.

  In this case, the central unit 10 can not transmit communication data to the line aggregation device 20 via the aggregation line 40. Therefore, the central unit 10 transmits communication data to the line aggregation device 20 via the other line aggregation device 20 capable of communicating with the line aggregation device 20. For example, the central unit 10 selects the line aggregation device 20A from the line aggregation devices 20A and 20B based on the priority related to the bandwidth described later, and transmits the line as the transmission destination address to the selected line aggregation device 20A. Communication data including the IP address of the aggregation device 20 is transmitted. The line aggregation device 20A receives the communication data, and transfers the communication data to the line aggregation device 20 according to the transmission destination address included in the received communication data. Thereby, the line aggregation device 20 can receive the signal control command information and the light beacon provision information from the central device 10 via the line aggregation device 20A.

  In addition, the line aggregation device 20 can not transmit communication data to the central device 10 via the aggregation line 40. Therefore, the line aggregation device 20 transmits communication data to the central device 10 via the line aggregation device 20A or 20B. For example, the line aggregation device 20 selects the line aggregation device 20A from the line aggregation devices 20A and 20B based on the priority regarding the bandwidth described later, and transmits communication data to the central apparatus 10 via the selected line aggregation device 20A. Send That is, the line aggregation device 20 transmits communication data including the IP address of the central apparatus 10 as the transmission destination address to the line aggregation device 20A. The line aggregation device 20A transfers communication data to the central apparatus 10 in accordance with the transmission destination address included in the received communication data. Thereby, the line aggregation device 20 transmits communication data such as signal control execution information, sensing information, and vehicle ID information received from the terminal device 30 under the line aggregation device 20 to the central apparatus 10 via the line aggregation device 20A. Can be sent.

  Here, the priority regarding the bandwidth will be described. FIG. 5 is a diagram showing the priority regarding the bandwidth.

  The line aggregation devices 20A and 20B also transmit and receive communication data with the central device 10 in the same manner as the line aggregation device 20. For this reason, the central apparatus 10 communicates data via one of the line aggregation devices 20A and 20B having a sufficient bandwidth (the one with a high communication speed) so as not to disturb the communication of the line aggregation devices 20A and 20B as much as possible. Needs to be transmitted to the line aggregation device 20. When the aggregation line 40A and the aggregation line 40B are lines having the same bandwidth, the bandwidth margin may be estimated by the types and the number of the terminal devices 30 subordinate to the line aggregation device 20A and the line aggregation device 20B. it can.

  For example, when the traffic light amount of the traffic signal controller 31 is "1", the ultrasonic vehicle sensor 32, the light beacon 33 and the image vehicle detector 34 respectively have "1", "3" and " It can be considered to have a communication volume of 10 ". Since the three traffic signal controllers 31, two ultrasonic vehicle sensors 32, and one optical beacon 33 are connected to the line aggregation device 20, the communication amount is "8". It can be estimated.

  Since the two traffic signal controllers 31, four ultrasonic vehicle sensors 32, and one light beacon 33 are connected to the line aggregation device 20A, the communication amount is "9". It can be estimated. Since the two traffic signal controllers 31, two ultrasonic type vehicle detectors 32, and one image type vehicle detector 34 are connected to the line aggregation device 20B, the communication amount can be increased. It can be estimated as "14".

  If the priorities are determined in ascending order of the communication amount, it is as shown in FIG. Therefore, the central unit 10 selects the line aggregation device 20A having a high priority (small value) among the line aggregation device 20A and the line aggregation device 20B, and selects the line aggregation device 20 via the selected line aggregation device 20A. Send communication data to Similarly, the line aggregation device 20 selects the line aggregation device 20A in accordance with the priority, and transmits communication data to the central apparatus 10 via the selected line aggregation device 20A. The table data shown in FIG. 5 may be updated by the central apparatus 10 periodically (for example, once a day) and distributed to the line aggregation apparatus 20.

[3-3. When all aggregated lines are abnormal]
FIG. 6 is a diagram showing the flow of communication data when all aggregated lines are abnormal. The case where all the collective lines are abnormal means a case where all of the collective line 40, the collective line 40A and the collective line 40B are abnormal due to disconnection or the like. That is, communication can not be performed between the line aggregation device 20 and the central device 10, and communication can be performed between each of the line aggregation devices 20A and 20B capable of communicating with the line aggregation device 20 and the central device 10. Indicates when it can not be done.

  In this case, there is no communication path connecting the line aggregation device 20 and the central device 10 within one hop. Therefore, the line aggregation device 20 determines signal control command information for controlling the traffic signal controller 31 under the control, and transmits the determined signal control instruction information to the traffic signal controller 31 under the line aggregation device 20. By doing this, the traffic signal controller 31 is controlled. For example, the line aggregation device 20 communicates with the line aggregation device 20B, and receives signal control command information of the line aggregation device 20B. The line aggregation device 20 determines the signal control command information so that the offset is synchronized with the traffic signal controller 31 subordinate to the line aggregation device 20B. Thereby, the timing of a green light can be synchronized between adjacent intersections, and traffic can be facilitated.

  The line aggregation device 20 determines the signal control command information of the traffic signal controller 31 based on sensing information collected from the ultrasonic vehicle sensor 32, the light beacon 33, the image vehicle sensor 34, etc. You may

  The line aggregation device 20 also stores the signal control execution information, the sensing information, and the vehicle ID information by writing the information in the storage unit 23.

[3-4. When consolidated line 40 is restored]
FIG. 7 is a diagram showing the flow of communication data when the aggregation line 40 is restored. When the aggregation line 40 is restored and communication between the central apparatus 10 and the line aggregation device 20 becomes possible, the line aggregation device 20 stores the signal control execution information stored in the storage unit 23 of the line aggregation device 20. , Sensing information and vehicle ID information to the central apparatus 10 sequentially.

[4. Processing Flow of Line Aggregation Device 20]
FIG. 8 and FIG. 9 are flowcharts showing the flow of processing executed by the line aggregation device 20.

  The line aggregation device 20 determines whether communication with the central unit 10 is normally performed (S2). For example, the control unit 22 determines whether communication with the central apparatus 10 is normally performed based on the presence or absence of a connection error such as a socket error of TCP / IP (Transmission Control Protocol / Internet Protocol). Do.

  When communication with the central apparatus 10 is normally performed (YES in S2), the line aggregation device 20 communicates between the central device 10 and another line aggregation device that can communicate with the line aggregation device 20. It is determined whether communication data to be exchanged has been received (S4). Here, the line aggregation device 20A and the line aggregation device 20B can communicate with the line aggregation device 20. Whether the communication data is exchanged between the central apparatus 10 and another line aggregation apparatus can be determined by the transmission destination address and the transmission source address. When the line aggregation device 20 receives communication data exchanged between the central device 10 and another line aggregation device, the integrated line between the other line aggregation device and the central device 10 is abnormal. That's the case.

  When communication data exchanged between the central apparatus 10 and another line aggregation apparatus is received (YES in S4), the control unit 22 of the line aggregation apparatus 20 prioritizes the received communication data. In response, it relays (S6). For example, the priority of communication data is determined as shown in FIG. The smaller the value, the higher the priority, and the "signal control command information" transmitted in the peak time zone such as morning and evening rush hours has the highest priority, and is transmitted in the off-peak time zone which is the other time zone The signal control instruction information and the "sensing information" have the next highest priority. The control unit 22 preferentially relays information with high priority according to the priority.

  The control unit 22 of the line aggregation device 20 relays communication data exchanged between the central device 10 and the terminal devices connected to the line aggregation device 20 (S8). Thereafter, the process returns to step S2.

  When communication data exchanged between the central apparatus 10 and the other line aggregation apparatus is not received (NO in S4), the control unit 22 of the line aggregation apparatus 20 does not transmit to the central apparatus 10 It is determined whether data is stored in the storage unit 23 (S10). If data is not stored in storage unit 23 (NO in S10), the process proceeds to step S8.

  If data is stored in storage unit 23 (YES in S10), control unit 22 determines whether it is a time zone in which the data stored in storage unit 23 can be transmitted to central apparatus 10 (S12). ). It is desirable to send the data stored in the storage unit 23 when there is sufficient bandwidth. For this reason, for example, it is desirable to send in the late-night time zone. If it is not a time zone in which the accumulated data can be transmitted (NO in S12), the process proceeds to step S8.

  If it is a time zone in which the stored data can be transmitted (YES in S12), the control unit 22 determines whether there is data to be transmitted / received prior to the stored data between the central apparatus 10 and the terminal apparatus 30 It is judged whether or not (S14). For example, if the communication unit 21 receives information with priority 1 or 2 in FIG. 10, it may be determined that there is communication data to be transmitted / received with priority.

  If there is communication data to be preferentially transmitted (YES in S14), the control unit 22 relays the communication data (S8).

  If there is no communication data to be preferentially transmitted (NO in S14), the control unit 22 transmits the data stored in the storage unit 23 to the central apparatus 10 (S16). Thereafter, the process returns to step S2.

  If communication with central apparatus 10 is not normally performed (NO in S2), referring to FIG. 9, control unit 22 can normally perform communication with another line aggregation apparatus. (S18). For example, based on the presence or absence of a connection error such as a TCP / IP socket error, it is determined whether communication with another line aggregation device is normally performed.

  If communication with another line aggregation device is normal (YES in S18), the control unit 22 is transmitted from the central apparatus 10 to the subordinate terminal device 30 of the line aggregation device 20 via the other line aggregation device. It is determined whether communication data has been received (S20). For example, when the communication unit 21 has not received communication data from the central apparatus 10 via another line aggregation device for a predetermined time, the control unit 22 has not received the communication data. It may be determined that That is, it may be determined that communication can not be performed between another line aggregation device and the central device 10. The predetermined time may be, for example, a time such as 5 minutes, or may be one cycle length of the traffic signal controller 31.

  When communication data exchanged between the central apparatus 10 and the terminal apparatus 30 subordinate to the line aggregation apparatus 20 is received from another line aggregation apparatus (YES in S20), as shown in FIG. This is a case where some of the aggregation lines are abnormal. For this reason, in such a case, the control unit 22 sends the communication data received from the other line aggregation device (the line aggregation device 20A in FIG. Send (S22). For example, the control unit 22 transmits signal control command information to the traffic signal controller 31. In addition, the control unit 22 transmits the light beacon provision information to the light beacon 33.

  Further, the control unit 22 transmits the communication data received from the terminal device 30 to the central unit 10 via another line aggregation device, or writes the communication data in the storage unit 23 (S24). The determination as to transmission to the central apparatus 10 or writing in the storage unit 23 is made based on the priority for each information type shown in FIG. 10 and the history accumulation information. For example, the control unit 22 transmits information having a priority of “1” or “2” among the communication data received from the terminal device 30 to the central device 10 via another line aggregation device. Here, the sensing information is transmitted to the central unit 10. In addition, the control unit 22 stores in the storage unit 23 information that is circled in the history accumulation information and has not been transmitted to the central apparatus 10. Here, the signal control execution information and the vehicle ID information are stored in the storage unit 23. Thereafter, the process returns to step S2.

  The case where communication data exchanged between the central apparatus 10 and the terminal apparatus 30 subordinate to the line aggregation apparatus 20 is not received from another line aggregation apparatus (NO in S20) is as shown in FIG. This is a case where all the aggregation lines are abnormal. Therefore, in such a case, the control unit 22 collects sensing information from the ultrasonic vehicle sensor 32, the light beacon 33 or the image vehicle sensor 34 subordinate to the line aggregation device 20, and Gather sensing information from the line aggregation device. The control unit 22 determines signal control command information of the traffic signal controller 31 connected to the line aggregation device 20 based on the collected sensing information, and transmits the determined signal control command information to the traffic signal controller 31. To control the traffic signal controller 31 (S26).

  The control unit 22 stores information such as signal control execution information collected from the subordinate terminal device 30 in the storage unit 23 (S28). Thereafter, the process returns to step S2.

  If communication with another line aggregation device is abnormal (NO in S18), information can not be acquired from the other line aggregation device. For this reason, the control unit 22 collects sensing information from the ultrasonic vehicle sensor 32, the light beacon 33 or the image vehicle sensor 34 under the line aggregation device 20, and the line aggregation is performed based on the collected detection information. Signal control command information of the traffic signal controller 31 connected to the device 20 is determined. The control unit 22 controls the traffic signal controller 31 by transmitting the determined signal control command information to the traffic signal controller 31 (S30). Thereafter, the process proceeds to step S28.

[5. Processing flow of central unit 10]
FIG. 11 is a flow chart showing the flow of processing executed by the central unit 10. The central unit 10 executes the processing described below for each line aggregation device 20.

  The control unit 12 of the central apparatus 10 determines whether the communication with the focused line aggregation apparatus 20 is normal (S32). As described above, whether or not the communication is normal may be determined based on the presence or absence of the occurrence of the connection error.

  If the communication with the line aggregation device 20 is normal (YES in S32), it is determined whether or not there is data stored in the line aggregation device 20 when the communication between the central apparatus 10 and the line aggregation device 20 is abnormal. To do (S34). For example, if the signal control execution information after a certain time is missing, it may be determined that there is data stored in the line aggregation device 20.

  If there is data stored in the line aggregation device 20 (YES in S34), the control unit 12 determines whether it is a time zone in which the storage data can be received (S36). For example, if the current time is included in the late-night time zone, which is a time zone where the bandwidth of aggregation line 40 has a margin, control unit 12 determines that it is a time zone in which stored data can be received. May be

  If it is a time zone in which accumulated data can be received (YES in S36), control unit 12 determines whether there is data to be transmitted to line aggregation device 20 (S38).

  If there is no data to be transmitted to the line aggregation device 20 (NO in S38), the control unit 12 transmits, to the line aggregation device 20, transmission request information for requesting transmission of the data stored in the storage unit 23. To do (S40). The control unit 22 of the line aggregation device 20 can transmit the data stored in the storage unit 23 to the central apparatus 10 in response to the transmission request information. After step S40, the process returns to step S32.

  If there is no data accumulated in the line aggregation device 20 (NO in S34), if it is not a time zone in which accumulated data can be received (NO in S36), or if there is data to be transmitted in the line aggregation device 20 In step S42, the control unit 12 transmits communication data such as signal control command information to the central apparatus 10. Thereafter, the process returns to step S32.

  If the communication with the line aggregation device 20 is abnormal (NO in S32), it is determined whether the communication with another line aggregation device capable of communicating with the line aggregation device 20 is normal (S44). This determination is performed similarly to the determination as to whether the communication with the line aggregation device 20 is normal.

  If communication with another line aggregation device is normal (YES in S44), control unit 12 transmits communication data such as signal control command information for line aggregation device 20 to the other line aggregation device. (S46). When there are a plurality of other line aggregation devices, control unit 12 selects another line aggregation device according to the priority regarding the bandwidth shown in FIG. 5 and transmits communication data to the selected other line aggregation device. . Thereafter, the process returns to step S32.

  If the communication with the other line aggregation device is abnormal (NO in S44), the process returns to step S32, and waits until the communication with the line aggregation device or the other line aggregation device is normal.

[6. Effects of the embodiment etc.]
As described above, according to the traffic control system 1 according to the embodiment of the present invention, the line aggregation device 20A and the central device 10 can also be connected via the line aggregation device 20A or the line aggregation device 20B which is another line aggregation device. Even if communication data exchanged with the terminal device 30 subordinate to the line aggregation device 20 can not be relayed, the line aggregation device 20 may be an ultrasonic type vehicle sensor 32 or an image type vehicle sensor The information of the vehicle sensor such as 34 can be used to determine signal control command information for controlling the traffic signal controller 31. For example, when traffic congestion is detected by the information of the ultrasonic type vehicle sensor 32, it is possible to create signal control command information to eliminate traffic congestion. Therefore, the traffic signal controller 31 can be operated in a desirable state even when communication data can not be relayed even through another communication line such as the collective line 40A and the collective line 40B.

  Further, when communication can not be performed in any of the line aggregation device 20 and the central device 10 and between the other line aggregation devices and the central device 10, the line aggregation device 20 is capable of performing another line aggregation. Signal control command information of the traffic signal controller 31 subordinate to the device can be acquired, and information of a vehicle sensor subordinate to another line aggregation device can be acquired. Therefore, for example, the control unit 22 determines the signal control command information of the traffic signal controller 31 subordinate to the line aggregation device so that the offset is synchronized with the traffic signal controller 31 subordinate to another line aggregation device. be able to. As a result, it is possible to create signal control command information that eliminates traffic congestion, and to operate the traffic signal controller 31 in a desirable state.

  Further, as described in step S6 of FIG. 8, the signal control command information and the sensing information that are important for the control of the traffic signal controller 31 can be relayed prior to other information. As a result, it is possible to control the traffic signal controller 31 as little as possible and to operate the traffic signal controller 31 in a desirable state.

  In addition, when relaying signal control command information in a time zone with a large traffic volume such as morning and evening rush hours, relay signal control command information with higher priority than relaying in other time zones. It is like that. For this reason, it is possible to control the traffic light controller 31 without any hindrance as much as possible in the time zone in which the traffic volume is large. Therefore, the traffic signal controller 31 can be operated in a desired state.

  Further, when communication can not be performed with the central apparatus 10, the line aggregation device 20 selects and selects one of the plurality of other line aggregation devices based on the priority related to the bandwidth of the other line aggregation device. The communication data is relayed via the other line aggregation device. Therefore, communication data can be relayed via another line aggregation device having a sufficient bandwidth. Therefore, communication data can be relayed while minimizing the influence on communication of other line aggregation devices without causing communication data to pass through to other line aggregation devices whose bandwidth is not enough.

  Also, the priority regarding the bandwidth is determined according to the type and number of subordinate terminal devices connected to other line aggregation devices. For this reason, no communication data is transmitted at all to other line aggregation devices to which a terminal device that communicates data of a large amount of data is connected or a large number of terminal devices are connected, or a very large communication It is possible not to send data. Therefore, communication data can be relayed while minimizing the influence on communication of other line aggregation devices.

  The line aggregation device 20 further includes a storage unit 23 that stores signal control execution information of the traffic signal controller 31 subordinate to the line aggregation device 20. The control unit 22 stores signal control execution information in the storage unit 23 when communication can not be performed between the line aggregation device 20 and the central device 10, and communication between the line aggregation device 20 and the central device 10 is restored. In this case, the signal control execution information stored in the storage unit 23 is transmitted to the central apparatus 10. For this reason, the signal control execution information that could not be transmitted in real time can be transmitted to the central apparatus 10 later. Therefore, in the central apparatus 10, the signal control execution information can be used for various statistical processes.

  Further, as described in step S20 of FIG. 9, when the communication unit 21 has not received communication data from the central apparatus 10 for a predetermined time, as described in step S20 of FIG. It is determined that communication with the central apparatus 10 can not be performed. Therefore, the above judgment can be made by a simple method.

  Further, even if the central apparatus 10 can not exchange communication data with a plurality of terminal devices 30 via the line aggregation device 20, the central device 10 exchanges communication data via another line aggregation device. It can be performed. Therefore, the signal control command information of the traffic signal controller 31 and the information of the vehicle sensor can be exchanged, and the traffic signal controller 31 can be operated in a desired state.

  The control unit 12 can communicate with the line aggregation device 20 when it can communicate with the line aggregation device 20 and corresponds to a time zone where there is a margin in the bandwidth of the aggregated line such as midnight. Signal control execution information of the traffic signal controller 31 subordinate to the line aggregation device 20 accumulated while communication is not possible is acquired from the line aggregation device 20. Therefore, the signal control execution information can be acquired from the line aggregation device 20 while avoiding a time zone in which there is no margin in bandwidth such as morning and evening rush hours. Therefore, the signal control execution information can be acquired without interrupting the communication of the important information such as the signal control command information of the traffic signal controller 31.

[7. Appendix]
The traffic control system 1 according to the embodiment of the present invention has been described above, but the present invention is not limited to this embodiment.
(Modification)

  For example, in the above-described embodiment, when the line aggregation device 20 can not communicate with the central device 10, among the plurality of other line aggregation devices based on the priority regarding the bandwidth of the other line aggregation device, One is selected, and communication data is relayed via the selected other line aggregation device. On the other hand, in such a case, a plurality of line aggregation devices may be selected instead of one. For example, the control unit 22 of the line aggregation device 20 may select both of the line aggregation devices 20A and 20B, which are other line aggregation devices, and relay communication data via the respective other line aggregation devices.

  At that time, the control unit 22 determines the distribution rate of communication data to a plurality of other line aggregation devices based on the priority regarding the bandwidth of the other line aggregation devices. The control unit 22 distributes communication data to a plurality of other line aggregation devices in accordance with the determined distribution rate, and relays communication data via the plurality of other line aggregation devices. For example, in the priority related to the bandwidth shown in FIG. 5, the priority of the line aggregation device 20A is "2", and the priority of the line aggregation device 20B is "3". For this reason, the distribution ratio is determined such that more communication data is distributed to the line aggregation device 20A with high priority as compared to the line aggregation device 20B with low priority. For example, the distribution rate of communication data of the line aggregation device 20A may be "14", and the distribution rate of communication data of the line aggregation device 20B may be "9". Since the ratio of the amount of communication between the line aggregation device 20A and the line aggregation device 20B is "9:14", the distribution ratio is "14: 9" which is the inverse ratio of the distribution ratio.

  As described above, the communication data of a larger amount of data is relayed as the other line aggregation devices having a margin in bandwidth, and the data amount of the communication data relayed by the other line aggregation devices having no margin in the bandwidth is reduced. Can. Therefore, communication data can be relayed while minimizing the influence on communication of other line aggregation devices.

  Further, each of the above-described devices may be specifically configured as a computer system including a microprocessor, a ROM, a RAM, a hard disk drive, a display unit, a keyboard, a mouse, and the like. A computer program is stored in the RAM or the hard disk drive. Each device achieves its function by the microprocessor operating according to the computer program. Here, the computer program is configured by combining a plurality of instruction codes indicating instructions to the computer in order to achieve a predetermined function.

  Furthermore, some or all of the components that configure each of the above-described devices may be configured from one system LSI (Large Scale Integration: large scale integrated circuit). The system LSI is a super-multifunctional LSI manufactured by integrating a plurality of components on one chip, and more specifically, a computer system including a microprocessor, a ROM, a RAM, and the like. . A computer program is stored in the RAM. The system LSI achieves its functions by the microprocessor operating according to the computer program.

  Furthermore, some or all of the components that make up each of the above-described devices may be configured from an IC card or a single module that is removable from each device. The IC card or module is a computer system including a microprocessor, a ROM, a RAM, and the like. The IC card or module may include the above-described ultra-multifunctional LSI. The IC card or module achieves its functions by the microprocessor operating according to the computer program. This IC card or this module may be tamper resistant.

  Also, the present invention may be the method described above. Further, the present invention may be a computer program that realizes these methods by a computer, or may be a digital signal composed of the computer program.

  Furthermore, the present invention provides a non-transitory recording medium that can read the computer program or the digital signal from a computer, such as a flexible disk, a hard disk drive, a CD-ROM, an MO, a DVD, a DVD, a DVD-ROM, a DVD-RAM, a BD. (Blu-ray (registered trademark) Disc), semiconductor memory, or the like may be used. Further, the present invention may be the digital signal recorded on these non-temporary recording media.

  In the present invention, the computer program or the digital signal may be transmitted via a telecommunication line, a wireless or wired communication line, a network typified by the Internet, data broadcasting, and the like.

  Further, the present invention may be a computer system comprising a microprocessor and a memory, wherein the memory stores the computer program, and the microprocessor operates according to the computer program.

In addition, another computer is independent by recording and transferring the program or the digital signal on the non-temporary recording medium, or transferring the program or the digital signal via the network or the like. It may be implemented by a system.
Furthermore, the above embodiment and the above modification may be combined respectively.

  It should be understood that the embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is indicated not by the meaning described above but by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

DESCRIPTION OF SYMBOLS 1 Traffic control system 10 Central apparatus 11 Communication part 12 Control part 20 Line aggregation device 20A Line aggregation device 20B Line aggregation device 21 Communication part 22 Control part 23 Storage part 30 Terminal device 31 Traffic signal control machine 32 Ultrasonic type vehicle sensor 33 Light beacon 34 Image type vehicle detector 40 Integrated line 40A Integrated line 40B Integrated line 50 Terminal line 60 Vehicle R Road

Claims (13)

A central line for communication data to be exchanged between a plurality of terminal devices including a traffic signal controller installed on the road or the roadside and a central device installed in a traffic control center, placed between the central device and the central device A line aggregation device that relays through
The communication data is exchanged with the plurality of terminal devices and with the central device, and the communication data is exchanged with another line aggregation device that can communicate with the line aggregation device. The communication unit to
A control unit that relays the communication data exchanged between the plurality of terminal devices and the central device by controlling the communication unit;
The control unit satisfies the first condition that (i) communication can not be performed between the line aggregation device and the central device, and communication can be performed between the other line aggregation device and the central device. Relaying the communication data via the other line aggregation device, and (ii) between the line aggregation device and the central device, and between the other line aggregation device and the central device Traffic signal controller connected to the line aggregation device based on information from any one of the plurality of terminal devices when the second condition that communication can not be performed is also satisfied Determining signal control command information for control, and controlling the traffic signal controller under the control based on the determined signal control command information ;
The line aggregation device
And a storage unit storing signal control execution information indicating execution results of traffic signal controllers under the line aggregation device.
The control unit stores the signal control execution information in the storage unit when communication can not be performed between the line aggregation device and the central device, and communication between the line aggregation device and the central device is performed. A line aggregation device for transmitting the signal control execution information accumulated in the storage unit to the central unit when recovered . When the second condition is satisfied, the control unit further controls the communication unit to control data used for controlling the traffic signal controller under the other line aggregation device, the other line The line aggregation device according to claim 1, wherein the traffic signal controller under the line aggregation device is controlled based on the data received from the aggregation device and received. The control unit prioritizes, among the communication data, the signal control command information of the traffic signal controller transmitted from the central apparatus and sensing information of a vehicle traveling on the road transmitted from the terminal device. The line aggregation device according to any one of claims 1 and 2, wherein the line aggregation is performed. The control unit relays the signal control command information by prioritizing relaying in a predetermined first time zone as compared to relaying in a time zone other than the first time zone. The line aggregation device according to any one of claims 1 to 3. The line aggregation device can communicate with the plurality of other line aggregation devices,
The control unit, when the first condition is satisfied, selects at least one of the plurality of other line aggregation devices based on the priority regarding the bandwidth of the other line aggregation device, and the other selected The line aggregation device according to any one of claims 1 to 4, wherein the communication data is relayed via the line aggregation device. The line aggregation device can communicate with the plurality of other line aggregation devices,
The control unit determines the distribution ratio of communication data to the plurality of other line aggregation devices based on the priority related to the bandwidth of the other line aggregation device when the first condition is satisfied, and the determination is made. The communication data is distributed to a plurality of other line aggregation devices according to a distribution ratio, and the communication data is relayed via the plurality of other line aggregation devices. Line aggregation device. 7. The line connection apparatus according to claim 5, wherein the priority is determined according to the type and number of subordinate terminal apparatuses connected to each of the other line aggregation apparatuses. The control unit, when the communication unit has not received the communication data from the central apparatus via the other line aggregation device for a predetermined time, the other line aggregation device and the other line aggregation device The line aggregation device according to any one of claims 1 to 7 , which determines that communication can not be performed with the central unit. A central line for communication data to be exchanged between a plurality of terminal devices including a traffic signal controller installed on the road or the roadside and a central device installed in a traffic control center, placed between the central device and the central device A line aggregation device that relays through
The communication data is exchanged with the plurality of terminal devices and with the central device, and the communication data is exchanged with another line aggregation device that can communicate with the line aggregation device. The communication unit to
A control unit that relays the communication data exchanged between the plurality of terminal devices and the central device by controlling the communication unit;
The control unit satisfies the first condition that (i) communication can not be performed between the line aggregation device and the central device, and communication can be performed between the other line aggregation device and the central device. Relaying the communication data via the other line aggregation device, and (ii) between the line aggregation device and the central device, and between the other line aggregation device and the central device Traffic signal controller connected to the line aggregation device based on information from any one of the plurality of terminal devices when the second condition that communication can not be performed is also satisfied Determining signal control command information for control, and controlling the traffic signal controller under the control based on the determined signal control command information;
When the second condition is satisfied, the control unit further includes at least signal control command information for controlling a traffic signal controller under control of the other line aggregation device by controlling the communication unit. The data used for controlling the traffic signal controller is received from the other line aggregation device, and the traffic signal controller under the line aggregation device is controlled based on the received data.
Line aggregation device. Traffic data is exchanged via the line aggregation device with a plurality of terminals connected to the line aggregation device through the aggregation line and including a traffic signal controller installed on the road or the roadside. A central unit installed at the control center,
A communication unit that exchanges the communication data with the plurality of terminal devices via the line aggregation device;
A control unit that exchanges the communication data with the plurality of terminal devices via the line aggregation device by controlling the communication unit;
The control unit can not communicate with the line aggregation device, and can communicate with another line aggregation device capable of communicating with the line aggregation device, via the other line aggregation device. When the communication data can be exchanged with the line aggregation device and communication can be made with the line aggregation device, and when the line aggregation device corresponds to a predetermined second time zone, A central apparatus for acquiring, from the line aggregation device, signal control execution information indicating execution results of traffic signal controllers under the line aggregation device accumulated while communication is not possible between the two . A central unit installed at the traffic control center,
A line aggregation device for relaying communication data exchanged between a plurality of terminal devices including traffic signal controllers installed on the road or the roadside and the central device through an integrated line laid between the central device Equipped with
The line aggregation device
The communication data is exchanged with the plurality of terminal devices and with the central device, and the communication data is exchanged with another line aggregation device that can communicate with the line aggregation device. The communication unit to
A control unit that relays the communication data exchanged between the plurality of terminal devices and the central device by controlling the communication unit;
The control unit satisfies the first condition that (i) communication can not be performed between the line aggregation device and the central device, and communication can be performed between the other line aggregation device and the central device. Relaying the communication data via the other line aggregation device, and (ii) between the line aggregation device and the central device, and between the other line aggregation device and the central device Also determines the signal control command information for controlling the traffic signal controller under control connected to the line aggregation device when the second condition that communication can not be performed is satisfied, and the determined signal control command information controlling the traffic signal controller of said subordinate on the basis of,
The line aggregation device
And a storage unit storing signal control execution information indicating execution results of traffic signal controllers under the line aggregation device.
The control unit stores the signal control execution information in the storage unit when communication can not be performed between the line aggregation device and the central device, and communication between the line aggregation device and the central device is performed. The traffic control system which transmits the said signal control execution information accumulate | stored in the said memory | storage part to the said central device, when recovered . A central line for communication data to be exchanged between a plurality of terminal devices including a traffic signal controller installed on the road or the roadside and a central device installed in a traffic control center, placed between the central device and the central device A traffic control method using a line aggregation device relaying through
In the case where communication can not be performed between the line aggregation device and the central device, and communication can be performed between another line aggregation device capable of communicating with the line aggregation device and the central device, Relaying the communication data via the line aggregation device of
If communication can not be performed in any of the line aggregation device and the central device and between the other line aggregation device and the central device, any one of the plurality of terminal devices The signal control command information for controlling the subordinate traffic signal controller connected to the line aggregation device is determined based on the information from the terminal device, and the subordinate traffic signal is determined based on the determined signal control command information. Controlling the controller ;
When communication can not be performed between the line aggregation device and the central device, signal control execution information indicating execution results of traffic signal controllers under the line aggregation device is stored in a storage unit, and Transmitting the signal control execution information stored in the storage unit to the central device when communication with the central device is restored . A central line for communication data to be exchanged between a plurality of terminal devices including a traffic signal controller installed on the road or the roadside and a central device installed in a traffic control center, placed between the central device and the central device A program for causing a computer to function as a line aggregation device relaying through
The communication data is exchanged with the plurality of terminal devices and with the central device, and the communication data is exchanged with another line aggregation device that can communicate with the line aggregation device. The communication unit to
The control unit causes the computer to function as a control unit that relays the communication data exchanged between the plurality of terminal devices and the central device by controlling the communication unit.
The control unit satisfies the first condition that (i) communication can not be performed between the line aggregation device and the central device, and communication can be performed between the other line aggregation device and the central device. Relaying the communication data via the other line aggregation device, and (ii) between the line aggregation device and the central device, and between the other line aggregation device and the central device Traffic signal controller connected to the line aggregation device based on information from any one of the plurality of terminal devices when the second condition that communication can not be performed is also satisfied Determining signal control command information for control, and controlling the traffic signal controller under the control based on the determined signal control command information ;
The line aggregation device
And a storage unit storing signal control execution information indicating execution results of traffic signal controllers under the line aggregation device.
The control unit stores the signal control execution information in the storage unit when communication can not be performed between the line aggregation device and the central device, and communication between the line aggregation device and the central device is performed. The program which transmits said signal control execution information accumulated in said storage part to said central unit, when recovered .