Center-based delaying time measurement system for real-time traffic signal information

Abstract

The present invention relates to a center-based real-time traffic signal information delay time measurement system, wherein a delay time measuring device installed as an option board in a traffic signal controller receives a first time-data (T1), which is the time at which traffic signal information was transmitted from the traffic signal controller, and simultaneously receives a second time-data (T2), which is the time at which traffic signal information was received from the city traffic information center; upon calculating the delay time (△T), which is the difference between the time-data, and transmitting it to the city traffic information center, the delay time (△T) can be rapidly resolved through subsequent measures such as wireless communication quality and traffic signal controller failure management based on the delay time analysis results for major regions, days, and months. Consequently, real-time processing of data collection and analysis is performed, which not only enables the construction of infrastructure for a next-generation C-ITS (Cooperative Intelligent Transport System) but also maximizes the data quality of real-time traffic signal information collected from the traffic signal controller via a mobile communication network, and increases the reliability of the real-time traffic signal linkage system by sharing the delay time (△T) information with service providers.

Description

Technology Field

[0001] The present invention relates to a center-based real-time traffic signal information delay time measurement system. More specifically, when a delay time measuring device installed in the form of an option board on a traffic signal controller receives a first time-data (T1), which is the time at which traffic signal information was transmitted from the traffic signal controller, and simultaneously receives a second time-data (T2), which is the time at which traffic signal information was received from the City Traffic Information Center, the delay time (△T), which is the difference between the time-data, is calculated and transmitted to the City Traffic Information Center. Based on the delay time analysis results for major regions, days, months, etc., the delay time (△T) can be rapidly resolved through subsequent measures such as wireless communication quality and traffic signal controller failure management. Consequently, real-time processing of data collection and analysis is performed, which not only enables the construction of infrastructure for next-generation C-ITS (Cooperative Intelligent Transport System) but also maximizes the data quality of real-time traffic signal information collected from traffic signal controllers via mobile communication networks. Furthermore, by sharing the delay time (△T) information with service providers, the reliability of the real-time traffic signal linkage system can be enhanced. This concerns a real-time traffic signal information delay time measurement system. Background Technology

[0002] Recently, as technology for autonomous vehicles has developed exponentially, interest in next-generation intelligent transportation systems (C-ITS, Cooperative Intelligent Transport System) has been surging. These systems aim to improve traffic flow efficiency by interconnecting and exchanging vehicle and road condition information, while simultaneously achieving a high level of sharing and automation of road, signal, and traffic information through the linkage of transportation system components.

[0003] Since these C-ITS services operate based on vehicle locations and traffic light status, the quality of the service depends on how accurately and quickly the integrated center communicates data with vehicles and traffic signal controllers on roads nationwide.

[0004] However, conventionally, the management system for traffic signal facilities is diversified, resulting in disadvantages such as high infrastructure deterioration, poor accessibility for information collection and utilization, and the inability to perform real-time processing due to slow data transmission speeds.

[0005] To solve these problems, the applicant researched a traffic signal information linkage system in which an integrated hub center collects traffic signal information directly from a traffic signal controller via a mobile communication network without passing through an external server or node.

[0006] FIG. 1 is a block diagram showing an integrated hub center of a traffic signal information linkage system disclosed in Korean Registered Patent No. 10-2536514 (Title of Invention: Center-based traffic signal information linkage system and method using mobile communication technology), filed and patented by the applicant.

[0007] The integrated hub center of FIG. 1 (hereinafter referred to as the prior art) (100) comprises a collection server (104) that receives controller information and vehicle operation information from a traffic signal controller and a driver terminal connected to a mobile communication network, a CVIM processing server (105) that, upon receiving controller information from the collection server (104), stores the received controller information in an operation DB server (101) and a history DB server (102) and simultaneously analyzes and processes the received controller information to generate signal status information including at least one of the output status information of the corresponding traffic light, controller status information, and traffic light remaining time information, and stores the generated signal status information in a real-time DB server (103), and a vehicle operation information that, upon receiving vehicle operation information from the collection server (104), stores the received vehicle operation information in a history DB server (102) and simultaneously analyzes and processes the received vehicle operation information to generate vehicle traffic information including at least one of vehicle location, speed, and lane location, and stores the generated vehicle traffic information in a real-time DB server. It consists of a vehicle operation information processing server (106) and an interlocking server (107) that compares the location of a driver terminal with the locations of traffic signal controllers, receives signal status information for a traffic signal controller corresponding to the vehicle from a CVIM processing server (105), transmits it to the driver terminal, and simultaneously transmits the signal status information generated by the CVIM processing server (105) to a corresponding local government signal control center server.

[0008] The prior art (100) configured in this manner has the advantage of enabling real-time data processing by having the integrated hub center directly receive controller information and vehicle operation information from the traffic signal controller and the driver terminal through a mobile communication network.

[0009] Generally, when a central server receives real-time data from multiple nodes, even if all nodes transmit real-time data to the central server at the same time, the central server does not receive the real-time data at the same time, but rather has different characteristics depending on the communication environment of each node.

[0010] In this case, the communication environment may include wireless communication quality and may include damage, failure, and aging of components constituting the node.

[0011] That is, the prior art (100) does not take into account the characteristics of such a communication environment at all, and when receiving data from traffic signal controllers, different delay times (△T) occur depending on the communication environment, and as a result, real-time processing of data is impossible, so it has the disadvantage of lowering the accuracy and reliability of the real-time traffic signal linkage system.

[0012] In addition, since the prior art (100) does not describe any technology or method for detecting the delay time (△T) of each traffic signal controller, it fails to resolve the delay time (△T) of each traffic signal controller, and as the delay time (△T) increases over time, a problem arises that further exacerbates the aforementioned problem. The problem to be solved

[0013] The present invention aims to solve these problems. The objective of the present invention is to provide a center-based real-time traffic signal information delay time measurement system that, when a delay time measuring device installed as an option board in a traffic signal controller receives a first time-data (T1), which is the time when traffic signal information was transmitted from the traffic signal controller, and simultaneously receives a second time-data (T2), which is the time when traffic signal information was received from the city traffic information center, calculates the delay time (△T), which is the difference between the time-data, and transmits it to the city traffic information center. This allows for the rapid resolution of the delay time (△T) through subsequent measures, such as wireless communication quality and traffic signal controller failure management, based on the delay time analysis results for major regions, days, and months. Consequently, real-time processing of data collection and analysis is performed, which not only enables the construction of infrastructure for a next-generation C-ITS (Cooperative Intelligent Transport System) but also maximizes the data quality of real-time traffic signal information collected from the traffic signal controller via a mobile communication network.

[0014] Furthermore, another objective of the present invention is to provide a center-based real-time traffic signal information delay time measurement system that can be operated simply by installing a delay time meter as an optional board type on a traffic signal controller, thereby simplifying infrastructure construction and reducing installation costs, and enabling uniform service even in small and medium-sized cities and provincial areas.

[0015] In addition, another objective of the present invention is to provide a center-based real-time traffic signal information delay time measurement system that can improve the accuracy and reliability of a real-time traffic signal linkage system by having the city traffic information center share delay time (△T) information with service providers utilizing traffic signal information.

[0016] In addition, another problem to be solved by the present invention is to provide a center-based real-time traffic signal information delay time measurement system in which the city traffic information center analyzes statistical data of the delay time (△T) of each traffic signal controller at every preset period (T) and determines the cause of the delay, thereby enabling more accurate and rapid follow-up measures regarding the delay time (△T). means of solving the problem

[0017] A solution means of the present invention for solving the above problem comprises a real-time traffic signal information delay time measurement system including a city traffic information center, at least one traffic signal controller that manages and controls the operation of previously assigned traffic lights, and a delay time meter installed in the traffic signal controller: wherein the traffic signal controller includes a CPU that generates traffic signal information indicating the lighting status of each of the previously assigned traffic lights, transmits it to the city traffic information center, and outputs a first time-data (T1), which is the time at which the traffic signal information was transmitted to the city traffic information center, to a delay time meter installed in itself; and when the city traffic information center receives the traffic signal information transmitted from the traffic signal controller, detects a second time-data (T2), which is the time at which the traffic signal information was received, and transmits the detected second time-data (T2) to a delay time meter installed in the traffic signal controller; and when the delay time meter receives the first time-data (T1) from the CPU and receives the second time-data (T2) from the city traffic information center, the input first The method calculates a delay time (△T) value, which is the time difference between time-data (T1) and the received second time-data (T2), and transmits the calculated delay time (△T) information to the aforementioned city traffic information center.

[0018] In addition, in the present invention, it is preferable that the city traffic information center, the traffic signal controller, and the delay time measuring device transmit and receive data through a mobile communication network.

[0019] In addition, in the present invention, the real-time traffic signal information delay time measurement system further includes at least one application service operation server, and the city traffic information center stores traffic signal information received from the traffic signal controller and time delay (△T) information received from the delay time measuring device, and it is preferable to provide the traffic signal information or the time delay (△T) information to the application service operation server upon a request from the application service operation server.

[0020] In addition, in the present invention, the city traffic information center preferably comprises: a DB server; a traffic signal information collection unit that collects traffic signal information received from the traffic signal controller and stores it in the DB server; a second time-data detection unit that detects a second time-data (T2), which is the time at which traffic signal information was received from the traffic signal controller; a control unit that transmits the second time-data detected by the second time-data detection unit to the traffic signal controller; and a delay time (△T) input unit that stores delay time (△T) information received from the delay time measuring device in the DB server.

[0021] In addition, in the present invention, the city traffic information center compares the delay time (△T) input from the delay time (△T) input unit with a preset threshold value (TH). If the delay time (△T) is less than or equal to the threshold value (TH), it determines that the data transmission of the corresponding traffic signal controller (7) is proceeding normally. If the delay time (△T) exceeds the threshold value (TH), it determines that an unexpected situation has occurred, which is a phenomenon where the data communication speed of the corresponding traffic signal controller (7) is excessively delayed. The control unit preferably transmits information indicating that an unexpected situation has occurred to a pre-registered worker terminal when the unexpected situation determination unit determines that an unexpected situation has occurred.

[0022] In addition, in the present invention, the traffic signal controller is a plurality, and the urban traffic information center further includes a sudden cause analysis unit, and the sudden cause analysis unit includes a wireless communication quality verification module that verifies whether the cause of the sudden situation detected by the sudden situation judgment unit is wireless communication quality; a wireless communication device status verification module that verifies whether the cause of the sudden situation detected by the sudden situation judgment unit is a hardware defect; and a sudden verification data generation module that generates sudden verification data by matching the judgment result detected by the wireless communication quality verification module, the judgment result detected by the wireless communication device status verification module, and the identification information of the sudden traffic signal controller, which is the traffic signal controller where the sudden situation occurred, and the wireless communication quality verification module includes an adjacent node extraction module that extracts adjacent nodes, which are adjacent traffic signal controllers connected to the same relay as the sudden traffic signal controller; and a delay time information extraction module that searches the DB server and extracts the recent delay time (△T) information of each of the adjacent nodes extracted by the adjacent node extraction module. A delay time average value calculation module that calculates the average value (T') of the delay times (△T) of adjacent nodes extracted by the delay time information extraction module; a difference value calculation module that calculates the difference value (D, D = T' - △T) between the delay time average value (T') calculated by the delay time average value calculation module and the delay time (△T) of the sudden traffic signal controller;The comparison and judgment module includes a comparison and judgment module that compares the absolute value of the difference value calculated by the difference value calculation module with a threshold value, which is the maximum absolute value of the difference value at which the cause of the sudden situation of the sudden traffic signal controller can be determined to be wireless communication quality, and if the absolute value of the difference value is less than or equal to the threshold value, determines that the cause of the sudden situation of the sudden traffic signal controller is 'wireless communication quality', and if the absolute value of the difference value exceeds the threshold value, determines that the cause of the sudden situation of the sudden traffic signal controller is not 'wireless communication quality'; and the device status verification module includes a delay time information extraction module that searches the DB server (31) to extract m previous delay time (△T) information of the sudden traffic signal controller; and a second delay time average value calculation module that calculates a second average value (T") which is the average value of the m previous delay times (△T) extracted by the delay time information extraction module. A second difference value calculation module that calculates a second difference value (D2, D2 = T" - △T), which is the difference between the second average value (T") calculated by the second delay time average value calculation module and the delay time (△T) of the sudden traffic signal controller; The control unit includes a second comparison and judgment module that compares the absolute value of the second difference value calculated by the second difference value calculation module with a second threshold value, which is the maximum value of the absolute value of the second difference value, to determine that the cause of the sudden situation of the sudden traffic signal controller is a hardware failure; if the absolute value of the second difference value is less than or equal to the second threshold value, determines that the cause of the sudden situation of the sudden traffic signal controller is a 'hardware failure'; and if the absolute value of the second difference value exceeds the second threshold value, determines that the cause of the sudden situation of the sudden traffic signal controller is not a 'hardware failure'. It is preferable that when sudden verification data is generated by the sudden verification data generation module, the control unit transmits the generated sudden verification data to the worker terminal of the worker in charge of the sudden traffic signal controller. Effects of the invention

[0023] According to the present invention having the above problem and means of solution, when a delay time measuring device installed in the form of an option board in a traffic signal controller receives a first time-data (T1), which is the time at which traffic signal information was transmitted from the traffic signal controller, and simultaneously receives a second time-data (T2), which is the time at which traffic signal information was received from the city traffic information center, the delay time (△T), which is the difference value between the time-data, is calculated and then transmitted to the city traffic information center. Based on the delay time analysis results for major regions, days, months, etc., the delay time (△T) can be quickly resolved through subsequent measures such as wireless communication quality and traffic signal controller failure management. Accordingly, real-time processing of data collection and analysis is achieved, which not only enables the construction of infrastructure for a next-generation C-ITS (Cooperative Intelligent Transport System) but also maximizes the data quality of real-time traffic signal information collected from the traffic signal controller via a mobile communication network.

[0024] In addition, according to the present invention, since operation is possible simply by installing a delay time meter as an optional board type on a traffic signal controller, not only is infrastructure construction simple, but installation costs are reduced, and uniform service can be provided to small and medium-sized cities and provincial areas.

[0025] In addition, according to the present invention, the accuracy and reliability of the real-time traffic signal linkage system can be improved by the City Traffic Information Center sharing delay time (△T) information with service providers utilizing traffic signal information.

[0026] In addition, according to the present invention, the city traffic information center analyzes statistical data of the delay time (△T) of each traffic signal controller at every preset period (T) and determines the cause of the delay, thereby enabling subsequent response to the delay time (△T) to be carried out more accurately and quickly. Brief explanation of the drawing

[0027] FIG. 1 is a block diagram showing an integrated hub center of a traffic signal information linkage system disclosed in Korean Registered Patent No. 10-2536514 (Title of Invention: Center-based traffic signal information linkage system and method using mobile communication technology), filed and patented by the applicant. FIG. 2 is a configuration diagram showing a center-based real-time traffic signal information delay time measurement system, which is an embodiment of the present invention. Figure 3 is a conceptual diagram to explain Figure 2. Figure 4 is a conceptual diagram showing the traffic signal controller of Figure 2. Figure 5 is a block diagram showing the delay time measuring device of Figure 2. Figure 6 is a block diagram showing the urban traffic information center of Figure 2. Figure 7 is a block diagram showing the cause analysis section of Figure 6. Specific details for implementing the invention

[0028] Hereinafter, an embodiment of the present invention will be described with reference to the attached drawings.

[0029] FIG. 2 is a configuration diagram showing a center-based real-time traffic signal information delay time measurement system, which is an embodiment of the present invention, and FIG. 3 is a conceptual diagram for explaining FIG. 2.

[0030] A center-based real-time traffic signal information delay time measurement system (1), which is an embodiment of the present invention, receives a first time-data (T1), which is the time when traffic signal information was transmitted from the traffic signal controller, and simultaneously receives a second time-data (T2), which is the time when traffic signal information was received from the city traffic information center. After calculating the delay time (△T), which is the difference between the time-data, and transmitting it to the city traffic information center, the delay time (△T) can be quickly resolved through subsequent measures such as wireless communication quality and traffic signal controller failure management based on the delay time analysis results for major regions / daily / monthly, etc. Accordingly, real-time processing of data collection and analysis is performed, which not only enables the construction of infrastructure for next-generation C-ITS (Cooperative Intelligent Transport System) but also maximizes the data quality of real-time traffic signal information collected from the traffic signal controller via a mobile communication network. Furthermore, the system is intended to increase the reliability of the real-time traffic signal linkage system by sharing the delay time (△T) information with service providers.

[0031] In addition, the center-based real-time traffic signal information delay time measurement system (1) of the present invention, as illustrated in FIGS. 2 and 3, manages and controls the operation of each of the pre-assigned traffic lights (11) according to a preset display cycle, generates traffic signal information including the signal status of each traffic light (11), transmits this to the city traffic information center (3) via a mobile communication network (10), and simultaneously outputs a first time-data (T1), which is the time at which the traffic signal was transmitted to the city traffic information center (3), to a delay time measuring device (5); a city traffic information center (3) that stores the traffic signal information received from the traffic signal controller (7), provides it according to requests from application service operating servers (9-1), ..., (9-N), and transmits a second time-data (T2), which is the time at which the traffic signal information was received from each traffic signal controller, to a delay time measuring device (5); and is installed in each traffic signal controller (7) as an option board type, and inputs from the corresponding traffic signal controller (7). It consists of a delay time meter (5) that calculates the delay time (△T), which is the difference between the first time-data (T1) and the second time-data received from the city traffic information center (3), and transmits it to the city traffic information center (3), and a mobile communication network (10) that provides a data movement path between the city traffic information center (3), the delay time meters (5), the traffic signal controllers (7), and the application service operation servers (9-1), ..., (9-N).

[0032] The mobile communication network (10) supports data communication between the city traffic information center (3), the traffic signal controller (7), the delay time meter (5), and the application service operation server (9-1), ..., (9-N), and in detail, it can be composed of LTE, 3G, 4G, and 5G networks.

[0033] In this invention, for the convenience of explanation, the data movement path between the city traffic information center (3), traffic signal controller (7), delay time meter (5), and application service operation server (9-1), ..., (9-N) has been described as being limited to a mobile communication network (10); however, the data communication network between them is not limited to a mobile communication network, and it is obvious that a known communication network or a communication network to be developed in the future may be applied.

[0035] Application service operating servers (9-1), ..., (9-N) are servers that provide application services or additional services by utilizing real-time traffic signal information provided by the city traffic information center (3), or provide application services or additional services by utilizing latency integrated analysis information provided by the city traffic information center (3).

[0036] For example, the application service operation server (9) can be configured as a server that provides navigation services, can be configured as a server that provides driving environment information for autonomous vehicles, and can be configured as a server that provides traffic information for roads nationwide.

[0037] Figure 4 is a conceptual diagram showing the traffic signal controller of Figure 2.

[0038] The traffic signal controller (7) of Fig. 4 is a controller that manages and controls the signals of the assigned traffic lights (11).

[0039] In addition, as shown in FIG. 4, the traffic signal controller (7) includes a CPU (71) that manages and controls the operation of the traffic signal controller (7), and a mobile communication modem (73) that connects to the mobile communication network (10) and transmits and receives data with an external server or node.

[0040] Additionally, although not shown in the drawing, the traffic signal controller (7) may include a pair of VPNs. In this case, the VPN (Virtual Private Network) is a virtual private network that uses the internet network like a dedicated line by applying a communication system and encryption, and can enhance the safety and security effects of data communication.

[0041] In addition, the traffic signal controller (7) is configured to enable two-way communication with the local government signal control center server (13), but is configured to enable one-way communication with the city traffic information center (3) to prevent illegal hacking, etc.

[0042] In addition, the traffic signal controller (7) periodically generates traffic signal information.

[0043] At this time, traffic signal information includes the lighting status of each traffic light, signal-map information, output designation, location, identification information, etc.

[0044] Additionally, when traffic signal information is generated, the traffic signal controller (7) transmits the generated traffic signal information to the city traffic information center (3) using one VPN of the mobile communication modem (73) and transmits control information to the local government signal control center (3).

[0045] In addition, when the traffic signal controller (7) receives optimal signal system information from the city traffic information center (3) via the mobile communication network (10), it controls the operation of the assigned traffic lights according to the received optimal signal system information, thereby enabling the signals of the entire road to be operated in an integrated and systematic manner. At this time, the optimal signal system information refers to the optimal signal system for each traffic light based on the current vehicle traffic.

[0046] The CPU (71) is the OS (Operating System) of the traffic signal controller (7) and manages and controls the overall operation of the traffic signal controller (7).

[0047] Additionally, the CPU (71) generates traffic signal information including the signal status, signal-map information, output designation, location, and identification information of each traffic light in conjunction with the previously assigned traffic lights (11), and controls the mobile communication modem (73) so that the generated traffic signal information is transmitted to the city traffic information center (3).

[0048] At this time, when traffic signal information is transmitted to the city traffic information center (3) via the mobile communication modem (73), the CPU (71) detects the first time-data (T1), which is the time when the traffic signal information was transmitted, and then outputs the detected first time-data (T1) to the delay time meter (5) of FIG. 5, which is installed and connected as an option board type.

[0049] Figure 5 is a block diagram showing the delay time measuring device of Figure 2.

[0050] The delay time measuring device (5) of Fig. 5 is installed as an optional board type in the traffic signal controller (7) and is a device for calculating the delay time (△T) between the traffic signal controller (7) and the city traffic information center (3).

[0051] At this time, the delay time (△T) refers to the time difference between the first time-data (T1), which is the time when the traffic signal controller (7) transmits traffic signal information to the city traffic information center (3), and the second time-data (T2), which is the time when the city traffic information center (3) receives the traffic signal from the traffic signal controller (7).

[0052] In addition, as shown in FIG. 5, the delay time meter (5) is composed of a second CPU (51) that manages and controls the operation of the delay time meter (5), a mobile communication module (53) that transmits and receives data to and from the city traffic information center (3) through the mobile communication network (10), and a data input / output module (55) that inputs and outputs data to and from the CPU (71) of the traffic signal controller (7).

[0053] When the second CPU (51) receives the first time-data (T1) from the CPU (71) through the data input / output module (55) and receives the second time-data (T2) from the city traffic information center (3) through the mobile communication module (53), it calculates the delay time (△T), which is the time difference between the first time-data (T1) and the second time-data (T2).

[0054] In addition, when the second CPU (51) calculates the delay time (△T), it controls the mobile communication module (53) so that the calculated delay time (△T) information is transmitted to the city traffic information center (3).

[0055] Figure 6 is a block diagram showing the urban traffic information center of Figure 2.

[0056] The city traffic information center (3) of Fig. 6 is a central server that stores and analyzes traffic signal information received from a traffic signal controller (7) and delay time (△T) information received from a delay time meter (5), generates meaningful information, provides the information to an application service operation server (9) that requested it, and enables follow-up action to be taken regarding the unexpected situation when an unexpected situation occurs where the delay time (△T) is greater than or equal to a threshold.

[0057] In addition, as shown in FIG. 6, the city traffic information center (3) is composed of a control unit (30), a DB server (31), a data transmission and reception unit (32), a traffic signal information collection unit (33), a real-time traffic information generation / storage unit (34), a second time-data detection unit (35), a delay time (△T) input unit (36), a sudden event-situation judgment unit (37), a sudden event cause analysis unit (38), and a delay time integrated analysis information generation unit (39).

[0058] The control unit (30) is the OS (Operating System) of the city traffic information center (3) and manages and controls the operations of the control targets (31), (32), (33), (34), (35), (36), (37), (38), (39).

[0059] Additionally, when the control unit (30) receives traffic signal information from the traffic signal controller (7) through the data transmission and reception unit (32), it inputs the received traffic signal information into the traffic signal information collection unit (33).

[0060] Additionally, when the control unit (30) receives traffic signal information from the traffic signal controller (7) through the data transmission and reception unit (32), it executes the second time-data detection unit (35), and when the second time-data is detected by the second time-data detection unit (35), it controls the data transmission and reception unit (32) so that the detected second time-data is transmitted to the delay time measurement unit (5) of the traffic signal controller (7).

[0061] Additionally, when the control unit (30) receives the delay time (△T) from the delay time measuring unit (5) through the data transmission and reception unit (32), it inputs the received delay time (△T) information into the delay time (△T) input unit (36).

[0062] In addition, the control unit (30) executes the delay time integrated analysis information generation unit (39) at every preset period (T).

[0063] The DB server (31) stores the communication identification information and location information of each traffic signal controller (7).

[0064] In addition, the DB server (31) stores the communication identification information of each delay time meter (5) and the identification information of the traffic signal controller (7) where the device is installed, in a matched manner.

[0065] In addition, real-time traffic information generated by the real-time traffic information generation / storage unit (34) is stored in the DB server (31).

[0066] In addition, the DB server (31) stores delay time (△T) information received from the delay time measuring device (5) under the control of the delay time (△T) input unit (36).

[0067] In addition, the DB server (31) stores the delay time integrated analysis information generated by the delay time integrated analysis information generation unit (39).

[0068] The data transmission and reception unit (32) transmits and receives data with the traffic signal controller (7), the delay time meter (5), and the application service operation server (9-1), ..., (9-N).

[0069] The traffic signal information collection unit (33) collects traffic signal information received from the traffic signal controller (7).

[0070] The real-time traffic information generation / storage unit (34) combines the traffic signal information generated by the traffic signal information collection unit (33) with road network information to generate real-time traffic information, and then stores it in the DB server (31).

[0071] The second time-data detection unit (35) is executed under the control of the control unit (30) when receiving traffic signal information from the traffic signal controller (7) through the data transmission and reception unit (32), and detects the second time-data, which is the time when the traffic signal information was received from the traffic signal controller (7).

[0072] Additionally, when the second time-data detection unit (35) detects the second time-data, it detects the delay time meter (5) installed in the traffic signal controller (7) that transmitted the traffic signal information, and then determines the detected delay time meter (5) as the transmission target.

[0073] At this time, when the second time-data is detected by the second time-data detection unit (35), the control unit (30) controls the data transmission / reception unit (32) so that the detected second time-data is transmitted to the delay time measuring device (5) that is the transmission target.

[0074] When the delay time (△T) input unit (36) receives delay time (△T) information transmitted from the delay time meter (5) through the data transmission / reception unit (32) under the control of the control unit (30), it stores the input delay time (△T) information in the DB server (31) and simultaneously outputs it to the sudden-situation judgment unit (37).

[0075] The sudden-situation judgment unit (37) compares the delay time (△T) input from the delay time (△T) input unit (36) with a preset threshold value (TH). If the delay time (△T) is less than or equal to the threshold value (TH), it determines that the data transmission of the traffic signal controller (7) is proceeding normally. If the delay time (△T) exceeds the threshold value (TH), it determines that a sudden-situation has occurred, which is a phenomenon in which the data communication speed of the traffic signal controller (7) is excessively delayed.

[0076] At this time, when the control unit (30) determines that an unexpected situation has occurred in the unexpected situation judgment unit (37), it executes the unexpected cause analysis unit (38).

[0077] Figure 7 is a block diagram showing the cause analysis section of Figure 6.

[0078] The sudden cause analysis unit (38) of Fig. 7 is executed under the control of the control unit (30) when the sudden situation judgment unit (37) determines that a sudden situation has occurred in a specific traffic signal controller (7).

[0079] In addition, the sudden cause analysis unit (38) is composed of a wireless communication quality verification module (381), a device status verification module (383), and a sudden verification data generation module (385), as shown in FIG. 7.

[0080] The wireless communication quality verification module (381) is a processor for verifying whether the cause of the incident is 'wireless communication quality'.

[0081] Additionally, the wireless communication quality verification module (381) consists of an adjacent node extraction module (3811), a delay time information extraction module (3812), a delay time average value calculation module (3813), a difference value calculation module (3814), and a comparison and judgment module (3815).

[0082] The adjacent node extraction module (3811) extracts adjacent nodes, which are adjacent traffic signal controllers (7) connected to a relay such as the traffic signal controller (7) where the sudden situation occurred.

[0083] The delay time information extraction module (3812) searches the DB server (31) and extracts the recent delay time (△T) information of each of the adjacent nodes extracted by the adjacent node extraction module (3811).

[0084] The delay time average value calculation module (3813) calculates the average value (T') of the delay times (△T) of adjacent nodes extracted by the delay time information extraction module (3812).

[0085] The difference value calculation module (3814) calculates the difference value (D, D = T' - △T) between the average delay time value (T') calculated by the average delay time value calculation module (3813) and the delay time (△T) of the traffic signal controller (hereinafter referred to as the traffic signal controller) (7) where the sudden event occurred.

[0086] The comparison and judgment module (3815) compares the absolute value of the difference value calculated by the difference value calculation module (3814) with a preset threshold value.

[0087] In this case, the threshold value refers to the maximum absolute value of the difference at which the sudden traffic signal controller determines that the cause of the sudden situation is wireless communication quality.

[0088] Additionally, the comparison and judgment module (3815) determines that if the absolute value of the difference is less than or equal to the threshold value, the cause of the sudden event of the sudden traffic signal controller is 'wireless communication quality', and if the absolute value of the difference exceeds the threshold value, it determines that the cause of the sudden event of the sudden traffic signal controller is not 'wireless communication quality'.

[0089] The device status verification module (383) is a processor for verifying whether the cause of the sudden traffic signal controller (7) is a ‘hardware failure’.

[0090] Generally, when a defect (wear, damage) occurs in hardware such as components of a traffic signal controller, it has the characteristic of having a long delay time (△T) repeatedly unless the hardware is replaced, and the device state verification module (383) of the present invention verifies whether the cause of the sudden situation is a hardware defect by taking into account the characteristics of such hardware.

[0091] Additionally, the device status verification module (383) consists of a delay time information extraction module (3831), a second delay time average value calculation module (3832), a second difference value calculation module (3833), and a second comparison and judgment module (3834).

[0092] The delay time information extraction module (3831) searches the DB server (31) and extracts m previous delay time (△T) information of the corresponding sudden traffic signal controller (7).

[0093] The second delay time average value calculation module (3832) calculates a second average value (T") which is the average value of m previous delay times (△T) extracted from the delay time information extraction module (3812).

[0094] The second difference value calculation module (3833) calculates the second difference value (D2, D2 = T" - △T), which is the difference between the second average value (T") calculated by the second delay time average value calculation module (3832) and the delay time (△T) of the sudden traffic signal controller.

[0095] The second comparison and judgment module (3834) compares the absolute value of the second difference value calculated by the second difference value calculation module (3833) with a preset second threshold value.

[0096] In this case, the second threshold value refers to the maximum absolute value of the second difference value, indicating that the cause of the sudden event in the sudden traffic signal controller is a hardware failure.

[0097] Additionally, the second comparison and judgment module (3834) determines that if the absolute value of the second difference is less than or equal to the second threshold value, the cause of the sudden situation of the sudden traffic signal controller is 'hardware failure', and if the absolute value of the second difference exceeds the second threshold value, it determines that the cause of the sudden situation of the sudden traffic signal controller is not 'hardware failure'.

[0098] The sudden verification data generation module (385) generates sudden verification data by matching the judgment result detected by the wireless communication quality verification module (381), the judgment result detected by the device status verification module (383), and the identification information of the sudden traffic signal controller.

[0099] At this time, when the sudden verification data is generated by the sudden verification data generation module (385), the control unit (30) transmits the generated sudden verification data to the terminal of the worker in the corresponding area.

[0100] The delay time integrated analysis information generation unit (39) utilizes and processes the delay time (△T) information of each traffic signal controller (7), detects delay time results by pre-set categories, generates delay time integrated analysis information by matching the detected delay time results by each category, and stores the generated delay time integrated analysis information in the DB server (31).

[0101] In this case, the category can consist of region, branch, month, day, time zone, day of the week, etc.

[0102] That is, the delay time integrated analysis information generation unit (39) generates various analysis information regarding delay time information so that it is convenient to use in the application service or additional service of the application service server (9-1), ..., (9-N).

[0103] As such, the center-based real-time traffic signal information delay time measurement system (1), which is an embodiment of the present invention, receives a first time-data (T1), which is the time when traffic signal information was transmitted from the traffic signal controller, and simultaneously receives a second time-data (T2), which is the time when traffic signal information was received from the city traffic information center. After calculating the delay time (△T), which is the difference between the time-data, and transmitting it to the city traffic information center, the delay time (△T) can be quickly resolved through subsequent measures such as wireless communication quality and traffic signal controller failure management based on the delay time analysis results for major regions / daily / monthly, etc. Accordingly, real-time processing of data collection and analysis is performed, which not only enables the construction of infrastructure for next-generation C-ITS (Cooperative Intelligent Transport System) but also maximizes the data quality of real-time traffic signal information collected from the traffic signal controller through a mobile communication network.

[0104] In addition, the center-based real-time traffic signal information delay time measurement system (1) of the present invention can be operated simply by installing a delay time meter as an optional board type on a traffic signal controller, so not only is the infrastructure construction simple, but installation costs are reduced, and uniform service can be provided to small and medium-sized cities, provincial areas, etc.

[0105] In addition, the center-based real-time traffic signal information delay time measurement system (1) of the present invention can improve the accuracy and reliability of the real-time traffic signal linkage system by sharing delay time (△T) information with service providers that utilize traffic signal information from the city traffic information center.

[0106] In addition, the center-based real-time traffic signal information delay time measurement system (1) of the present invention allows the city traffic information center to analyze statistical data of the delay time (△T) of each traffic signal controller at every pre-set period (T) and determine the cause of the delay, thereby enabling subsequent response to the delay time (△T) to be carried out more accurately and quickly. Explanation of the symbols

[0107] 1: Center-based real-time traffic signal information delay measurement system 3: City Traffic Information Center 5: Delay Time Meter 7: Traffic Signal Controller : Application Service Operation Server 10: Mobile communication network 11: Traffic light 30:Control Unit 1:DB Server 32: Data Transmission / Reception Unit 33: Traffic Signal Information Collection Unit 34: Real-time traffic information generation / storage unit 35: Second time-data detection unit 36: Delay Time (△T) Input Section 7: Unexpected Situation Judgment Section 38: Incident Cause Analysis Unit 39: Latency Integrated Analysis Information Generation Unit 51: 2nd CPU 3: Mobile communication module 55: Data I / O Module 3811: Adjacent Node Extraction Module 3812: Latency Information Extraction Module 3813: Average Latency Calculation Module 3814: Difference Calculation Module 3815: Comparison and Judgment Module 3831: Delay time information extraction module 3332: Second delay time average value calculation module 3833: 2nd Difference Calculation Module 3834: 2nd Comparison and Judgment Module

Claims

Claim 1 A real-time traffic signal information delay time measurement system comprising a city traffic information center, at least one traffic signal controller that manages and controls the operation of previously assigned traffic lights, and a delay time meter installed in the traffic signal controller: wherein the traffic signal controller includes a CPU that generates traffic signal information indicating the lighting status of each of the previously assigned traffic lights, transmits it to the city traffic information center, and outputs a first time-data (T1), which is the time at which the traffic signal information was transmitted to the city traffic information center, to a delay time meter installed in itself; wherein when the city traffic information center receives the traffic signal information transmitted from the traffic signal controller, it detects a second time-data (T2), which is the time at which the traffic signal information was received, and transmits the detected second time-data (T2) to a delay time meter installed in the traffic signal controller; and when the delay time meter receives the first time-data (T1) from the CPU and receives the second time-data (T2) from the city traffic information center, it receives the input first time-data (T1) and the received second Calculate a delay time (△T) value which is the time difference of time-data (T2), and transmit the calculated delay time (△T) information to the city traffic information center. The real-time traffic signal information delay time measurement system further includes at least one application service operation server. The city traffic information center stores traffic signal information received from the traffic signal controller and time delay (△T) information received from the delay time measuring device. Upon a request from the application service operation server, the city traffic information center provides traffic signal information or time delay (△T) information to the application service operation server. The city traffic information center includes a DB server; a traffic signal information collection unit that collects traffic signal information received from the traffic signal controller and stores it in the DB server; a second time-data detection unit that detects a second time-data (T2), which is the time at which traffic signal information was received from the traffic signal controller; and a control unit that transmits the second time-data detected by the second time-data detection unit to the traffic signal controller.A real-time traffic signal information delay time measurement system comprising: a delay time (△T) input unit that stores delay time (△T) information received from the delay time measuring device in the DB server; the city traffic information center compares the delay time (△T) input from the delay time (△T) input unit with a preset threshold value (TH), and if the delay time (△T) is less than or equal to the threshold value (TH), determines that the data transmission of the corresponding traffic signal controller (7) is proceeding normally, and if the delay time (△T) exceeds the threshold value (TH), determines that a sudden situation has occurred, which is a phenomenon in which the data communication speed of the corresponding traffic signal controller (7) is excessively delayed; and further comprising a sudden situation determination unit, wherein if the sudden situation determination unit determines that a sudden situation has occurred, the control unit transmits information indicating that a sudden situation has occurred to a pre-registered worker terminal. Claim 2 A real-time traffic signal information delay time measurement system according to claim 1, characterized in that the city traffic information center, the traffic signal controller, and the delay time measuring device transmit and receive data through a mobile communication network. Claim 3 delete Claim 4 delete Claim 5 delete Claim 6 In paragraph 2, the traffic signal controller is a plurality, and the city traffic information center further includes a sudden cause analysis unit, and the sudden cause analysis unit includes a wireless communication quality verification module that verifies whether the cause of the sudden situation detected by the sudden situation judgment unit is wireless communication quality; a wireless communication device status verification module that verifies whether the cause of the sudden situation detected by the sudden situation judgment unit is hardware failure; a sudden verification data generation module that generates sudden verification data by matching the judgment result detected by the wireless communication quality verification module, the judgment result detected by the wireless communication device status verification module, and the identification information of the sudden traffic signal controller, which is the traffic signal controller where the sudden situation occurred; and the wireless communication quality verification module includes an adjacent node extraction module that extracts adjacent nodes, which are adjacent traffic signal controllers connected to the same relay as the sudden traffic signal controller; a delay time information extraction module that searches the DB server and extracts the recent delay time (△T) information of each of the adjacent nodes extracted by the adjacent node extraction module; and in the delay time information extraction module A delay time average value calculation module that calculates an average value (T') of the delay times (△T) of the extracted adjacent nodes; a difference value calculation module that calculates a difference value (D, D = T' - △T) between the delay time average value (T') calculated by the delay time average value calculation module and the delay time (△T) of the sudden traffic signal controller;The comparison and judgment module includes comparing the absolute value of the difference value calculated by the difference value calculation module with a threshold value, which is the maximum absolute value of the difference value at which the cause of the sudden situation of the sudden traffic signal controller can be determined to be wireless communication quality; if the absolute value of the difference value is less than or equal to the threshold value, the cause of the sudden situation of the sudden traffic signal controller is determined to be 'wireless communication quality'; and if the absolute value of the difference value exceeds the threshold value, the cause of the sudden situation of the sudden traffic signal controller is determined not to be 'wireless communication quality'. The device status verification module includes a delay time information extraction module that searches the DB server (31) to extract m previous delay time (△T) information of the sudden traffic signal controller; a second delay time average value calculation module that calculates a second average value (T") which is the average value of the m previous delay times (△T) extracted by the delay time information extraction module; and the second average value (T") calculated by the second delay time average value calculation module and the sudden traffic signal controller A real-time traffic signal information delay time measurement system comprising: a second difference value calculation module that calculates a second difference value (D2, D2 = T") which is a difference value of a delay time (△T); a second comparison and judgment module that compares the absolute value of the second difference value calculated by the second difference value calculation module with a second threshold value, which is the maximum value of the absolute value of the second difference value, to determine that the cause of the sudden situation of the sudden traffic signal controller is a hardware failure, and if the absolute value of the second difference value is less than or equal to the second threshold value, determines that the cause of the sudden situation of the sudden traffic signal controller is a 'hardware failure', and if the absolute value of the second difference value exceeds the second threshold value, determines that the cause of the sudden situation of the sudden traffic signal controller is not a 'hardware failure'; and wherein the control unit transmits the generated sudden verification data to the worker terminal of the worker in charge of the sudden traffic signal controller when sudden verification data is generated by the sudden verification data generation module.

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