KR102498003B1 - Traffic control system for traffic safety and accident prevention at the smart intersection - Google Patents

Abstract

The present invention relates to a traffic control system for traffic safety and accident prevention at a smart intersection. The present invention controls the operation of traffic equipment including traffic lights installed at each traffic point according to different traffic signal control information when a vehicle passes at a traffic point including a plurality of different intersections, so that the traffic is smooth and the traffic signal controller and When the operation of traffic equipment is controlled by the traffic signal controller, the control operation of each traffic signal controller from a remote location is integrated according to the conversion of traffic signal control information, so that the traffic is generally smooth. there is.
The present invention matches the database built in the central control center with the database of the traffic signal controller installed in the field, so that the traffic signal controller installed in the field can perform accurate control in response to the appropriate traffic situation according to the command instructed by the central control center. It works.

Description

Traffic control system for traffic safety and accident prevention at the smart intersection {Traffic control system for traffic safety and accident prevention at the smart intersection}

The present invention relates to a traffic control system for traffic safety and accident prevention at a smart intersection. It is about a traffic control system for traffic safety and accident prevention at a smart intersection that can provide an accurate and smooth traffic environment.

Recently, the increase in vehicles can be said to be explosive compared to the establishment and increase of roads and traffic processing facilities.

Therefore, roads, highways, and automobile-only roads in the city center cannot escape the identity of vehicles, resulting in enormous embellishment in the movement of emergency vehicles to rescue property or human life, and the resulting damage is beyond imagination. am.

More specifically, as the demand for automobiles has recently increased and the road supply rate has decreased, traffic congestion frequently occurs, and such congestion causes environmental pollution, noise, consumption of automobile fuel consumption, and social losses due to congestion. . In particular, with the increase in densely populated downtown areas, traffic congestion is emerging as a social problem.

The traffic signal control system is implemented by a remote central control center and a traffic signal controller installed on site.

The traffic signal control system controls the traffic light time of an intersection through real-time communication between the central control center and the traffic signal controller, and the traffic light time of an intersection is divided into walking time of a pedestrian road, green time of vehicles, yellow time of vehicles, etc. If the conditions for these times are not accurately set, it is linked to various accidents such as pedestrian accidents and vehicle accidents during actual operation.

Accordingly, the signal database built in the central control center and the database built in the traffic signal controller must exactly match each other in such a setting time, so that accurate control can be performed when controlling the signal.

However, when the traffic signal controllers installed in many cities perform on-site work to reflect the frequently changing traffic conditions at the site, only the signal database of the traffic signal controller at the site is modified and the signal database of the central control center is left unmodified. Or, conversely, only the signal database of the central control center is modified, and the signal database of the traffic signal controller at the site is left unmodified. In the signal control of the intersection, accurate control cannot be performed and the time taken longer than the time corresponding to the traffic volume It frequently occurs that congestion is caused at intersections by giving a

In addition, there have been frequent cases in which congestion and the like as described above affect adjacent roads, thereby deteriorating overall traffic conditions.

Korean Patent Publication No. 10-2010-0135697 Korean Patent Publication No. 10-2012-0078765 Korean Patent Publication No. 10-2016-0143220

Therefore, in order to solve this problem, the present invention establishes a means or method that can check whether the main database of the central control center and the database of the traffic signal controller installed at the intersection match, so that it can be checked accurately It is to provide a traffic control system for traffic safety and accident prevention at a smart intersection that can be matched.

In addition, a traffic control system for traffic safety and accident prevention at smart intersections that can perform accurate control when controlling signals at intersections by ensuring that the database built in the central control center and the database built into the traffic signal controller exactly match each other. It aims to provide what it can offer.

In addition, it is possible to provide a traffic control system for traffic safety and accident prevention at a smart intersection to solve problems caused by the discrepancy between the database stored in the central control center and the database stored in the traffic signal controller. The purpose.

In order to solve this problem, the traffic control system for traffic safety and accident prevention at a smart intersection according to the present invention is a traffic control system including a traffic light installed at each traffic point when a vehicle passes at a traffic point including an intersection. When the operation of traffic equipment is controlled by the traffic signal controller and the traffic signal controller that controls the operation for each different traffic signal control information to ensure smooth passage, the control operation of each traffic signal controller at a remote location is converted into traffic signal control information. In the intelligent intersection signal control system including a central control center that comprehensively manages and smooths traffic according to the traffic signal controller and the central control center, when each traffic becomes smooth as a whole, a number of It is characterized in that a table storing traffic signal control information for each different traffic point and each traffic device is identically provided, and a matching relationship between traffic signal control information is set and registered in advance.

In addition, when new traffic signal control information different from traffic signal control information is generated in the table of the traffic signal controller, the central control center synchronizes the current new traffic signal control information with its own table according to the matching relationship. , Synchronization of traffic signal control information in real time, and when the new traffic signal control information is synchronized, synchronization is diversified for different control types including traffic signal schedules, updates, and event information in traffic signal control information. It is characterized by smooth connection.

In addition, the traffic signal controller includes a data input/output unit that receives appropriate signal control variables corresponding to the traffic situation at the site from the communication control unit of the central control center, and a control unit that controls the operation of traffic lights according to the control signal. It is characterized in that it consists of a configuration comprising.

In addition, the central control center includes a communication control unit that receives encrypted information on traffic conditions of intersections and transmits an appropriate control signal according to the information to the traffic signal controller, a decryption unit that decrypts the encrypted information, and It is characterized in that it is made up of a configuration including a central server that generates a control signal to ensure proper traffic flow is maintained at the intersection.

Furthermore, as a method of matching the signal database of the central control center and the signal database of the traffic signal controller, the step of automatically collecting and registering information from each of the traffic signal controllers having positions spaced apart from each other every time the time setting period elapses. And the traffic signal controller collects the management standard information as common standard information to the central control center, matches and sets the standard information of the traffic signal controller, registers it, and provides it to the corresponding traffic signal controller to integrate the standard information The step of comprehensively managing and checking whether the database of the central control center and the database of the traffic signal controller are inconsistent in order to solve the discrepancy between the central control center and the traffic signal controller at the traffic site, and the step of checking the traffic signal It is characterized in that it comprises the step of collecting and registering the matching information of the database and the database in synchronization with the management operation of the central control center by the controller.

Therefore, the present invention matches the database built in the central control center with the database of the traffic signal controller installed in the field, so that the traffic signal controller installed in the field can respond appropriately to the traffic situation and perform more accurate control, thereby smoothing vehicle traffic. This is achieved, and the error correction speed of data through the database is increased through the data processing system, so that rapid processing is possible.

1 is a diagram conceptually showing a traffic control system for traffic safety and accident prevention at a smart intersection according to an embodiment of the present invention.
2 is a reference diagram for performing a database synchronization method;
3 is a flowchart of a method of synchronizing a database of a central control center and a database of a traffic signal controller;
Figure 4 is a flow chart showing the synchronization method procedure of the database.
5 is a diagram conceptually showing a traffic control system for traffic safety and accident prevention at a smart intersection according to a second embodiment.
6 is a block diagram showing an exemplary data processing system;
7 is a flowchart illustrating a method of processing an error correction code of a database by way of example;
8 is a data flow diagram for explaining an error correction code processing method;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to components of each drawing, it should be noted that the same components have the same numerals as much as possible even if they are displayed on different drawings.

In addition, in the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

In addition, since the terms used in this application are only used to describe specific embodiments, it is not intended to limit the present invention, and it is clear in advance that a singular expression also means a plurality of expressions unless the context clearly indicates otherwise. want to leave

1 is a diagram conceptually showing a traffic control system for traffic safety and accident prevention at a smart intersection according to an embodiment of the present invention, FIG. 2 is a reference diagram for performing a database synchronization method, and FIG. 3 is a central control center 4 is a flowchart showing the procedure of the database synchronization method, and FIG. 5 is traffic control for traffic safety and accident prevention at a smart intersection according to the second embodiment. It is a diagram conceptually showing a system, FIG. 6 is a block diagram exemplarily showing a data processing system, FIG. 7 is a flowchart for illustratively explaining a method for processing an error correction code in a database, and FIG. 8 is an error correction code processing method. It is a data flow diagram to explain the method.

First, it will be described with reference to FIG. 1 . As shown, the traffic control system according to the present embodiment controls the operation of traffic equipment including traffic lights 400 installed at each traffic point when a vehicle passes at a traffic point including an intersection, and controls different traffic signals. A traffic signal controller 300 for smooth passage by controlling information by information;

When the operation of traffic equipment is controlled by the traffic signal controller 300, it is formed in a remote location and manages the control operation of each traffic signal controller 300 integrally according to the conversion of traffic signal control information, so that the passage is smooth. It consists largely of a central control center 200 to do so.

Hereinafter, each component of the central control center 200 and the traffic signal controller 300 will be described.

Components of the central control center 200 include a communication control unit 210 that receives encrypted information on traffic conditions at an intersection and transmits appropriate control signals to the traffic signal controller 300, and the encrypted information It consists of a configuration including a decoding unit 220 that decodes and a central server 230 that generates a control signal for maintaining proper traffic flow at the intersection from the information decoded through the decoding unit 220.

Components of the traffic signal controller 300 include a data input/output unit 310 that receives appropriate signal control variables corresponding to the traffic situation at the site from the communication control unit 210 of the central control center 200; It consists of a configuration including a control unit 320 for controlling the operation of the traffic light 400 according to the control signal. Here, the traffic signal light 400 refers to a device installed on a road to instruct passing vehicles or people to stop, detour, or proceed by turning on or off lights such as red, green, yellow, and green arrows.

The traffic signal controller 300 is installed on the road to turn on the traffic light 400 and the pedestrian traffic light (not shown) for pedestrian passage. That is, the traffic light 400 and the pedestrian traffic light are respectively controlled by the setting program by the built-in hardware and software. In addition, the traffic signal controller 300 can control itself, and control from the remote control center 200 is also possible.

The control unit 320 of the traffic signal controller 300 capable of transmitting and receiving in both directions with the central control center 200 controls traffic signals or compares, analyzes, processes and controls input and output data, etc. is to do In addition, the control unit 320 controls the traffic light 400 and the pedestrian traffic light according to cycles of turning on, off, and blinking of the traffic light 400 set in a signal control DB (not shown).

Accordingly, the traffic signal controller 300 drives the corresponding traffic light 400 installed in an adjacent area under the control of the central control center 200 .

The traffic signal controller 300 transmits and receives traffic signal control information with one or more adjacent traffic signal controllers 300 through a communication network such as wired or wireless to share vehicle traffic and pedestrian traffic. make it possible Furthermore, the traffic signal control information may be transmitted to the central control center 200 .

In addition, the traffic signal controller 300 transmits and receives the traffic signal control information related to traffic volume to and from the central server 230 of the central control center 200 by wire or wirelessly through a communication network.

The central server 230 formed in the central control center 200 requests state information of traffic lights 400 from all traffic signal controllers 300 located on a certain route.

In addition, when the traffic signal controller 300 receives information on the current state of the traffic light 400, such as, for example, green light on or red light on, for example, the corresponding traffic light generate a control signal.

In addition, the data input/output unit 310 of the traffic signal controller 300 receives a signal requesting provision of state information of the traffic light 400 from the central control center 200 or Receives a control request signal requesting control.

And, when the controller 320 of the traffic signal controller 300 receives a control request signal requesting control of the traffic light 400 from the central control center 200, the control unit 320 transmits the signal of the traffic light 400 connected to itself. Control.

And, when the control unit 320 receives a signal requesting provision of traffic light state information, the current state of the traffic light 400, that is, a certain signal from the traffic light 400, to the central control center 200. Transmits the status information of the traffic light on whether or not it is on.

Here, an example is described in which the control unit 320 transmits status information only when the central control center 200 requests the status information of the traffic light 400. Conveying the status information of the traffic light 400 is also included.

Hereinafter, an operational relationship using the database 240 built in the central control center 200 and the database 330 built in the traffic signal controller 300 will be described.

First, briefly explaining the operational relationship, each data table (not shown, a type of memory) of the central control center 200 and the traffic signal controller 300 is provided with the same table, and the matching between the data Setting and registering information, synchronizing data, mapping (mapping or matching) to matching information between the data, automatically converting new data having consistency between the data, writing and registering in the corresponding table, and automatically reflecting it .

Therefore, when specific information is changed, the information is identified in real time according to the matching relationship and transmitted to the central control center 200 or the traffic signal controller 300 to match each other. It is a form to be made. In other words, it is to match the database by promoting the consistency of information.

Hereinafter, a detailed description will be given of matching the databases 240 and 330 of the central control center 200 and the traffic signal controller 300 to each other.

When traffic on the road becomes smooth, the central control center 200 and the traffic signal controller 300 equally equip a data table storing traffic signal control information for each of a plurality of different traffic points and traffic equipment. Next, a matching relationship between traffic signal control information is registered in advance and inputted.

Then, the central control center 200, when new traffic signal control information different from traffic signal control information is generated into the table of the traffic signal controller 300, present new traffic signal control information according to the matching relationship. is synchronized with its own table, so traffic signal control information is matched in real time.

In addition, when the new traffic signal control information is synchronized, synchronization is diversified for each different control type, including the traffic signal schedule and update, and event information (special events such as vehicle accidents) in the traffic signal control information. This is to make the connection smooth.

Referring to FIG. 2, it is a table shown to compare information stored in the database 240 of the central control center 200 and the database 330 of the traffic signal controller 300. Due to the synchronization result, both databases 240 and 330 If the same information exists, all of them are newly added to update and unify all databases, and if information exists in only one of the database 240 or database 330, information is added to the database without information to update and unify. it is the way

Therefore, the traffic signal controller 300 transmits the operation of traffic equipment including the traffic light 400 installed at each intersection traffic point to different traffic signal control information when a vehicle passes at a traffic point including a plurality of different intersections. It is controlled separately to ensure a smooth traffic environment.

In addition, when the operation of traffic equipment is controlled by the traffic signal controller 300 from a remote location, the central control center 200 controls the control operation of each traffic signal controller 300 according to the conversion of traffic signal control information. Because it is managed in an integrated way, it is also to promote traffic safety and the prevention of traffic accidents by ensuring smooth traffic as a whole.

Hereinafter, a flow chart showing a database matching method of a traffic control system for traffic safety and accident prevention at a smart intersection according to the present invention will be described with accompanying drawings. Descriptions overlapping with those described above will be omitted to some extent.

Referring to FIG. 3, it is a flowchart of a method for matching the database 240 of the central control center 200 and the database 330 of the traffic signal controller 300 of the traffic control system for traffic safety and accident prevention at a smart intersection. , and this is explained.

First, the traffic signal controllers 300 formed separately from each other automatically collect and register information whenever a time setting period elapses from each other (first step).

The first step is a method of integrating, classifying, and managing traffic signal controllers 300 installed in at least one or more spaced apart locations using standardized traffic information. This is a method of storing the above standard traffic information to form data and accumulating all of them.

In the next step, the traffic signal controller 300 converts and collects the management standard information from the central control center 200 into common standard information, and also matches and registers the standard information of the traffic signal controller 300, It is provided to the corresponding traffic signal controller 300 to integrate all of the reference information for overall comprehensive management (step 2).

Next, in order to solve the inconsistency of each database at the traffic site of the central control center 200 and the traffic signal controller 300, the database 240 of the central control center 200 and the traffic The database 330 of the signal controller 300 is checked for inconsistency and corrected and matched (third step).

That is, in the third step, if the traffic signal controller 300 in the central control center 200 does not match the consistency (identity) of the tables in which the traffic signal control information is stored, if it is determined that the traffic signal control information is inconsistent, match them.

Hereinafter, with reference to FIG. 4, the steps of a method of matching the consistency of tables in which traffic signal control information is stored will be described.

In S 110 , information stored in the database 330 of the traffic signal controller 300 may be inquired by a processing unit (not shown) of the central control center 200 . In addition, the processing unit may query the database 330 periodically or upon request of a manager.

In S 120, the processing unit determines whether the information stored in the database 330 of the traffic signal controller 300 and the information stored in the database 240 of the central control center 200 are the same based on the data identifier. .

In S 130, if the information stored in the database 240 and the information stored in the database 330 of the traffic signal controller 300 are not the same, the traffic signal is based on the information stored in the database 240 of the central control center 200. Information stored in the database 330 of the signal controller 300 may be updated.

In addition, the processing unit, when the information stored in the traffic signal controller 300 and the information stored in the database 240 of the central control center 200 are not the same, the database 330 based on the information stored in the database 240 It is possible to synchronize both databases by updating the stored information. In addition, the processing unit is formed in both the central control center 200 and the traffic signal controller 300 to ensure the integrity of matching by enabling cross checks between each other.

Next, the traffic signal controller 300 synchronizes with the management operation of the central control center 200 to collect and register matching information between the database 240 and the database 330 (step 4).

Therefore, the fourth step is achieved by adding a separate database (not shown) so that the manager can grasp the management information, and both the traffic signal controller 300 and the central control center 200 have matching information. It would be desirable to have them all formed.

Therefore, using the method according to the present invention, when the traffic signal controller 300 near an intersection performs work at the site in order to reflect the frequently changing traffic conditions at the site, the corresponding database 330 installed at the site ), and the database 240 of the central control center 200 is not modified, and as a result of leaving it in an inconsistent state, accurate control is performed in the control of signals using the traffic signal controller 300 at the intersection. It is possible to solve the problem of causing congestion at the intersection by giving a longer or shorter time than the time corresponding to the traffic volume and congestion in the adjacent area.

Hereinafter, a second embodiment of a traffic control system for traffic safety and accident prevention at a smart intersection of the present invention will be described with reference to FIG. 5 .

In this second embodiment, like the above-described embodiment, a central control center 500 for controlling traffic signals is formed in addition to the traffic signal controller 600 installed at a general intersection. In addition, the output information of the traffic light T is generated by the traffic signal controller 600 and the central control center 500 formed remotely.

However, direct signal output for the traffic light T is made through the traffic signal controller 600. The traffic light T is installed at each access road of each intersection, and the signal output unit 630 is formed in the traffic light T installed at each intersection access road.

The output information of the traffic light T is generated by a priority signal algorithm based on intersection access information (approaching speed, approaching location, etc.) of vehicles approaching the intersection.

Although the generation method is slightly different for each priority signal algorithm, the output information of the traffic light (T) is in the steps of passing through the intersection (Blue), stopping (Red), and warning (Yellow), which controls the traffic light (T). made up of information.

The signal control unit 610 is the vehicle signal operation information received from the traffic signal controller 600 at the intersection or the output information of the traffic lights T determined sequentially by the internal operation database 640 and the central control center 500 Driving information of the traffic light T is determined through the signal output unit 630 based on the output information of the traffic light T received from the signal output unit 630 .

The driving information of each signal output unit 630 determined by the signal control unit 610 is transmitted to the signal driver 620 at regular intervals, for example, in units of 100ms, and the signal driver 620 transmits the signal control unit 610 Based on the driving information received from ), the output of the corresponding signal output unit 630 is performed.

The traffic light T transmits the feedback information of the output signal to the signal driving unit 620, and the signal driving unit 620 includes it in the response packet (not shown) of the signal control unit 610 to the signal control unit. Send to (610). The signal control unit 610 transmits collected driving information (feedback information) of traffic lights in each direction to the central control center 500 .

In addition, the traffic signal controller 600 performs a matching function between the second databases 540 and 640 in the signal driving unit 620 for safe signal operation based on the received traffic light driving information.

Determination of whether the second database 640 of the traffic signal controller 600 matches the second database 540 of the central control center 500 is performed in two steps. Step 1 is traffic light (T) It is a method of determining by hardware through the signal driving unit 620 that drives, and the second step is a method of determining by software through the signal control unit 610.

The signal driver 620 generates a database discrepancy when the driving information of the signal output unit 630 and the signal feedback information collected by the signal output unit 630 do not match for a certain period of time. It performs red flag detection function.

The mismatch detection function is a state in which the green signal is off by the voltage monitoring method and the feedback signal of the traffic light is input from the signal output unit 630 (ie, the traffic light T is not driven, but the corresponding green traffic light is output) ) is defined as a contradiction (inconsistency) state, and the inconsistency time is measured to determine inconsistency of the databases 540 and 640.

The red light monitoring function is a current monitoring method, and the red light, which is the vehicle stop signal, is turned on, but the feedback signal of the red light is not input (that is, the red light is driven, but the red light is not output). is defined as a state of inconsistency (inconsistency), and the inconsistency time is measured, from which the inconsistency of the database is determined.

The contradiction signal generated in step 1 is monitored by the signal control unit 610 at regular intervals (for example, every 100 ms), and when a contradiction signal is detected, the signal control unit 610 determines that the databases 540 and 640 are inconsistent. to consider and match.

The signal contradiction detection generated in step 2 is performed by the signal control unit 610, and software compares the feedback information and drive information of each signal driver 620 at regular intervals (for example, every 100 ms) to ensure discrepancies between the databases. , and the discrepancy determination method applies the same method as the 1st stage contradiction detection method. The method of matching the database applies mutatis mutandis to the method described with reference to FIG. 4 .

In addition to the above-described function of detecting discrepancies of the intersections of the second databases 540 and 640 at these intersections, a discrepancy detection function for preventing vehicle accidents and the like is required. In the second embodiment, the central control center 500 is a second database of the central control center 500 that causes congestion or accidents in and out of intersections based on driving information of traffic lights T collected in real time. 540 and the second database 640 of the traffic signal controller 600 determine whether a mismatch occurs, and if a mismatch occurs, match information is generated and transmitted to the signal control unit 610 to match.

Hereinafter, in order to increase the speed of data generated through the databases 230 and 540 of the central control centers 200 and 500 of the above-described embodiment and the second embodiment, and to output the data normally, an error occurs. A data system and a method for reducing it will be described. For reference, it should be noted in advance that the databases 240 and 540 all include a device for storing data, and the databases 330 and 640 of the traffic signal controller 300 can also perform the same function.

6 is a block diagram showing an exemplary data processing system 700 including a database. Referring to the drawing, the data processing system 700 includes a host device 710 and databases 230 and 540.

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The host device 710 includes, for example, portable electronic devices such as mobile phones and MP3 players, or electronic devices such as laptop computers, desktop computers, game consoles, TVs, and beam projectors.

The databases 230 and 540 are configured to operate in response to requests from the host device 710 . The data storage device 720 is configured to store data accessed by the host device 710 . That is, the databases 230 and 540 may be used as a main storage device or an auxiliary storage device of the host device 710 .

The databases 230 and 540 include a controller 730 , a nonvolatile memory device 740 and a buffer memory device 750 . The controller 730 , the nonvolatile memory device 740 and the buffer memory device 750 may be configured as memory devices connected to the host device 710 through various interfaces. Also, the controller 730, the nonvolatile memory device 740, and the buffer memory device 750 may be configured as a solid state drive (SSD).

The controller 730 is configured to control the nonvolatile memory device 740 and the buffer memory device 750 in response to a request from the host device 710 . For example, the controller 730 is configured to provide data read from the nonvolatile memory device 740 to the host device 710 . As another example, the controller 730 is configured to store data provided from the host device 710 in the nonvolatile memory device 740 . For this operation, the controller 730 is configured to control read, program (or write), and erase operations of the data storage medium 740 .

In order to improve the data processing speed of the data storage device 720, the controller 720 processes data through the buffer memory device 750. For example, the controller 730 is configured to buffer data read from the nonvolatile memory device 740 in the buffer memory device 750 and provide the buffered data to the host device 710 . As another example, the controller 730 is configured to buffer data provided from the host device 710 in the buffer memory device 750 and store the buffered data in the nonvolatile memory device 740 .

The controller 730 includes an error correction code unit 731 . The error correction code unit 731 is configured to perform an error correction code encoding operation on data provided from the host device 710 . For example, the error correction code unit 731 is configured to generate parity data based on data provided from the host device 710 . Both data provided from the host device 710 and generated parity data are stored in the nonvolatile memory device 740 .

The error correction code unit 731 is configured to perform an error correction code decoding operation on data read from the nonvolatile memory device 740 . For example, the error correction code unit 731 is configured to detect an error in data read from the nonvolatile memory device 740 using parity data. The error correction code unit 731 is configured to correct the detected error when an error of a correctable size is detected.

One of several encoding methods classified according to encoding performance or encoding method may be used as the encoding method of the error correction code unit 731 .

For example, the error correction code unit 731 may be a Bose, Chaudhuri, Hocquenghem (BCH) code, a Reed-Solomon (RS) code, a low density parity check (LDPC) code, or a convolutional code. ) code and a cyclic redundancy check (CRC) code. As another example, the error correction code unit 731 may perform an encoding operation by using BCH codes, RS codes, LDPC codes, convolutional codes, and CRC codes in combination.

Data provided from the host device 710 is preferentially provided to the error correction code unit 731 . The error correction code unit 731 is configured to encode data provided from the host device 710 as soon as the data is provided. Data encoded through the error correction code unit 731 is buffered in the buffer memory device 750 .

Data buffered in the buffer memory device 750 is finally stored in the nonvolatile memory device 740 .

7 is a flowchart illustrating a method of processing error correction codes of databases 230 and 540 by way of example. 8 is a data flow diagram for explaining an error correction code processing method according to the present embodiment. Referring to FIGS. 6 to 8 , an error correction code encoding method of the databases 230 and 540 of FIG. 6 will be described.

In step S210, data to be stored in the nonvolatile memory device 140 is received from the host device 710. Data received from the host device 710 is preferentially provided to the error correction code unit 731 . Data received from the host device 710 may be continuous data, that is, sequential data. Data received from the host device 710 may be non-continuous data, that is, random data.

In step S220, as soon as data is received, the error correction code unit 731 encodes the received data for error correction. In step S230, the encoded data is stored in the buffer memory device. According to this procedure, data received from the host device 710 is not preferentially stored in the buffer memory device 750 . That is, after error correction code encoding is performed on data received from the host device 710, the data is stored in the buffer memory device 750.

Referring to FIG. 8 as an example, data D2 received from the host device 710 is preferentially provided to the error correction code unit 731 . The error correction code unit 731 encodes the received data D2 and generates parity data PD2 according to the encoding result. As a result of encoding the error correction code, encoded data ED2 obtained by adding parity data PD2 to the received data D2 is generated. The encoded data ED2 is stored in the buffer memory device 750 . The encoded data ED1 is stored in the buffer memory device 750 through this process before the encoded data ED2 is generated.

Referring back to FIG. 7 , in step S240 , encoded data is stored from the buffer memory device 750 to the nonvolatile memory device 740 . That is, data buffered in the buffer memory device 750 is finally stored in the nonvolatile memory device 740 .

Although not shown, the transfer time of encoded data from the buffer memory device 750 to the nonvolatile memory device 740 may be determined according to the storage capacity of the buffer memory device 750 . For example, as the storage capacity of the buffer memory device 750 increases, the transfer time of encoded data from the buffer memory device 750 to the nonvolatile memory device 740 may be delayed. As another example, the transfer time of encoded data from the buffer memory device 750 to the nonvolatile memory device 740 may be determined according to a performance policy of firmware driven by the controller 730 .

According to this embodiment, as soon as data is received from the host device 710, an error correction code encoding operation is performed. Then, the encoded data is stored in the buffer memory device 750. Therefore, when the received data is first stored in the buffer memory device 750 and the stored data is moved to and stored in the nonvolatile memory device 740, the error correction code encoding operation takes longer than when the error correction code encoding operation is performed. Since the processing time can be reduced, the data processing speed becomes much faster.

Those skilled in the art to which the present invention pertains as described above will understand that it can be implemented in other specific forms without changing the technical spirit or essential characteristics of the present invention. Therefore, it should be understood that the above-described embodiments are illustrative and not limiting.

The scope of the present invention is indicated by the appended claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts should be construed as being included in the scope of the present invention. do.

200: central control center 210: communication control unit
220: decryption unit 230: central server
240: database 300: traffic signal controller
310: data input / output unit 320: control unit
330: database 400: traffic light
500: central control center 540: second database
600: traffic signal controller 610: signal controller
620: signal driving unit 630: signal output unit
640: second database T: traffic light
700: data processing system 710: host device
720: data storage device 730: controller
740: non-volatile memory device 750: buffer memory device

Claims (5)

When a vehicle passes at a passage point including an intersection, a traffic signal controller controls the operation of traffic equipment including traffic lights installed at each passage point according to different traffic signal control information to ensure smooth passage; and
When the operation of traffic equipment is controlled by the traffic signal controller, a central control center that comprehensively manages the control operation of each traffic signal controller from a remote location according to the conversion of traffic signal control information to ensure smooth passage; In the intelligent intersection signal control system,

1. The traffic signal controller and the central control center,
In order to match each database, as a first method, a table storing traffic signal control information for each of a number of different traffic points and traffic equipment is equally provided, and a matching relationship of traffic signal control information is set and registered in advance ,

The central control center,
a) When new traffic signal control information different from traffic signal control information is generated in the table of the traffic signal controller, the current new traffic signal control information is synchronized with its own table according to the matching relationship, so traffic signal control in real time match information,
b) When the new traffic signal control information is synchronized, synchronization is diversified according to different control types including traffic signal schedule, update, and event information in the traffic signal control information so that mutual connection is smooth,

2. The traffic signal controller and the central control center,
In order to match each database, as a second method, information is automatically collected and registered from each of the traffic signal controllers having positions spaced apart from each other at each elapse of a set period,
The traffic signal controller collects management standard information as common standard information to the central control center, matches and sets the standard information of the traffic signal controller, registers it, and provides it to the corresponding traffic signal controller to integrate and synthesize the standard information manage,
In order to solve the inconsistency between the central control center and the traffic signal controller at the traffic site, whether the database of the central control center and the database of the traffic signal controller are inconsistent is checked,
The traffic signal controller collects and registers matching information of each database in synchronization with the management operation of the central control center,
Determination of whether the collected traffic signal controller and each database of the central control center match is determined when the driving information of the signal output unit in the signal driving unit driving the traffic light and the signal feedback information collected by the signal output unit do not match for a certain period of time. case,
As creating inconsistency in the database, it performs a discrepancy detection function and a red flag detection function,
The inconsistency detection function defines a state in which the green signal is off and the feedback signal of the traffic light is input from the signal output unit as a contradiction (inconsistency) state, measures the inconsistency time, determines inconsistency of the databases,
The red light detection function defines a state in which the red light, which is the stop signal of the vehicle, is turned on, but the feedback signal of the red light is not input as a contradiction (inconsistency) state, and determines the inconsistency of the database by measuring the inconsistency time. A traffic control system for traffic safety and accident prevention at a smart intersection, characterized in that.
delete According to claim 1,
The traffic signal controller
It is characterized in that it consists of a configuration including a data input/output unit that receives appropriate signal control variables corresponding to the on-site traffic conditions from the communication control unit of the central control center, and a control unit that controls the operation of traffic lights according to the control variables. A traffic control system for traffic safety and accident prevention at a smart intersection.
According to claim 1,
The central control center
A communication control unit that receives information on traffic conditions at an encrypted intersection and transmits an appropriate control signal accordingly to the traffic signal controller; a decoder that decrypts the encrypted information; A traffic control system for traffic safety and accident prevention at a smart intersection, characterized in that it consists of a configuration including a central server that generates a control signal to be maintained.
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