KR20190016040A - Control and management of traffic signal system through VANET - Google Patents

Abstract

Programming the city's traffic signal system (TLS) is a matter of complex optimization. The main problem with real-world processes is that they are long-term, expensive and obscure processes that must be repeated regularly to reflect changes in the traffic flow. The present invention is configured through utilization of a vehicle ad hoc network (VANET) for collecting traffic data in real time and transmitting it to a traffic management system. VANET is currently defined by the IEEE 802.11p standard. We suggest using VANET in conjunction with other techniques to control TLS. This invention can be used to more effectively program actual TLS, manage the network in real time, and simulate the termination of urban planning studies, transportation plans or special events (sports, culture, parades, etc.). TLS can also be programmed in real time through efficient algorithms that exist or will be developed.

Description

Traffic light control and management system using barnet

The present invention is in the field of systems used to control and manage traffic signals to cause fluid circulation.

Existing current system

Programming the city's traffic signal system (TLS) is a matter of complex optimization. Most TLS in cities are controlled by electromechanical systems or microprocessors. Few systems are designed to control TLS in real time, and as we know, no city can automatically control major TLS in real time.

In general, the programming plan for TLS is reprogrammed for a day and for a period of one week, such as 15:00 to 18:00. This plan will be applied over the next several years. In addition, even during peak periods, changes in vehicle flow occur. This methodology can not account for this change, since the arrival of a vehicle is simulated by statistical methods such as Poisson's Law. This invention provides precise distribution information of vehicle movement because it provides the position and speed of each vehicle every 0.1 second or less. Semi-sensitive or fully-sensitive systems also allow you to change the duration of the cycle, but you must install a loop detector under the pavement and these systems will not be installed across the network. In addition, maintaining these systems can be prohibitively expensive. This invention replaces these loop detectors and provides more accurate information to administrators managing traffic lights at street intersections.

The current procedure recommended by the Traffic Technicians Association (ITE) for TLS programming is shown in Figure 1. This is a complex, lengthy, and costly process that needs to be fixed on a regular basis. This method is used by most cities, institutions and public administration agencies and is still the most reliable method. This process is handled with past cyclical data. This data is used to determine system programming to be applied by the transportation engineer and the transportation specialist. Modeling is usually done using special simulation software. These software can model various optimization scenarios and provide information on performance measurements (latency, average speed, queue length, etc.). This is an iterative process that requires cycling experts to apply various scenarios until they find a satisfactory solution

. The best-looking solution remains intact and validated again before implementation in the field (see Figure 1, Implementation and Fine-tuning). Programming is done at one or many intersections. Once a TLS plan is established, it will not change for many years.

The key elements of the ITE process are based on the reliability of data collected by field, source-destination surveys or other means.

Although all modern technology is available, it is best to do some research manually. Automation equipment requires installation and effort that may not be practical. Certain types of information are difficult to obtain without direct manual observation. For example, rotation at an intersection is difficult to track without direct manual observation. The size of the vehicle can be used to determine the class of the vehicle (truck, bus, passenger car), but can not identify the difference between a private car and taxi. Manual observations can be carried out using fully manual methods using a variety of portable devices (hands-free counters, radar meters, etc.) that support the recording of data or paper forms that can record data. Semi-automated methods primarily rely on the use of pneumatic road tubes and a wide variety of recorders that can be connected to these tubes. These devices are generally portable and can be moved to other locations. Other portable devices are also available. Fully automated research generally utilizes a variety of permanently installed detectors or sensors with connection to stationary or mobile computer stations. The same permanent detectors and sensors are also used to operate the sensitive and / or adaptive signals. The growth of sensor technology is moving toward the deployment of these devices in large networks.

(See: Traffic Engineering Manual, Fourth Edition, Roger P. Roess, Elena S. Prassas, and William R. McShane, ch. 8, 2011).

 This invention is based on a completely different paradigm. It is no longer a sensor or other device to check the position of a vehicle or the flow of traffic, but rather the vehicle that transfers position, speed and other information to the system every moment. So you no longer have to manually compute or install sensors to get traffic data. You can collect traffic data more accurately without having to manually compute or install a large sensor.

The goal of data collection is to count the number of vehicles passing through to a specific location. It is sometimes necessary to send an engineer to the site to manually estimate the number of vehicles passing through each intersection and in both directions.

These data are used to establish the means and reflect similarly as possible reality. This data roughly represents the flow of the circulation to be used in the simulation or calculation.

In the present invention, the traffic lights can be programmed using data collected by the VANET. Therefore, you do not have to go to the site to collect these data manually or install a sensor. In addition, TLS can be updated on a regular basis or as needed, depending on the functionality of the data collected by VANET.

The present invention

This invention is specifically relevant to the data collection process proposed and the creative use of the data in this document; This invention no longer requires people to stay on the road and collect data. The data is collected using VANET and utilized in the database.

The present invention is designed to collect traffic data with VANET to program current TLS. The programming of current TLS is based on historical traffic flow data measured in the field (eg manual calculation). The present invention has been configured for use with VANET to collect such traffic data and to program the current TLS (static or adaptive with detection loop). The present invention is more economical and more accurate than the methods used by cities, government agencies, or public administration agencies.

The main reason VANET was invented in early 2000 was to improve road safety. This is possible, for example, by providing information to the driver of the vehicle. The invention consists of utilizing a vehicle ad hoc network (VANET) to collect traffic data and transmit it to a traffic management system. This is not the same as originally planned for VANET. VANET is currently defined by the IEEE 802.11p standard. In VANET, every vehicle acts as a node in the ad hoc network. Each vehicle can receive status-related information from other vehicles in every second (0.1 second or less) within a range of about 300 meters. The information available on the VANET is information on the speed, acceleration, position, braking system, etc. of each vehicle. This information is sent to the communication station-RSU (RSU) installed along the road and forwarded to the base station (see Figure 2). This is called the communication mode between vehicle and vehicle (V2V), between vehicle and infrastructure (V2I), and between infrastructure and infrastructure (I2I). VANET operates at a dedicated frequency spectrum of 75 MHz bandwidth and 5.9 GHz allocated by the government authority. VANET can also operate in a variety of weather conditions (rain, fog, snow).

The IEEE 802.11p standard is a modification of the IEEE 802.11 standard. In Europe, Asia, or other continents, standards may be adjusted or changed in accordance with the rules of an international standardization body that may be different in some countries or regions of the world. For example, in Europe, 802.11p was used as the basis for the standard ITS-G5, which supports the GeonetWorking protocol for vehicles and infrastructure. The intent of the international standardization body is to make the VANET-related standards (regardless of their name) as compatible as possible.

We suggest using this technology to collect the data and pass it on to the systems installed in the Control Center (Figure 3 and others). This data can then be used to test various scenarios for programming TLS as previously described and actually utilized by cycling experts in the ITE process shown in Figure 1. You can also use this data for other purposes, such as urban research.

Data collection methods and system architecture are described in an article published at the 2016 SUMO conference at the German Aerospace Center DLR in Berlin, Germany (Francois Vaudrin, eng., Laval University and Laurence Capus , Ph.D., Laval University, Conference SUMO 2016 - Traffic, Mobility, Logistics, Procedures, Berlin).

No invention, PCT, patents or pending patents provide accurate and functional results based on the standards and methodologies in force for the programming of traffic light systems, such as the present invention.

No invention, PCT, patents or pending patents provide accurate and functional results, such as the present invention, using the data of VANET to perform the same tasks as the actual adaptation system.

No invention, PCT, patent or pending patent can provide accurate and functional results, such as inventions using VANET data to manage and control TLS in real time.

No invention, PCT, patents or pending patents provide accurate and functional results, such as inventions using data from VANET to help control circulation and TLS with traffic policemen.

No invention, PCT, patent, or pending patent can provide accurate and functional results, such as the invention using VANET data for various urban studies.

Advantages of the present invention

The present invention is more accurate and complete than the existing methods. The present invention will collect more data for the simulation and make it compliant with the ITE process.

You may also need to manually calculate in the field or install other expensive equipment such as sensors and cameras and loop detectors to collect circular data. These expensive processes are no longer required by this invention. The collection of data through the inventive method is simpler, less costly, and requires little maintenance.

The advantage of this invention is that a large number of parameters can be obtained (every vehicle speed, position, distance between each vehicle, etc.) every second. Public administrations can modify their programming plan as often as they like. When changes are observed, the system provides real-time data, so you can go back to the scene and quickly simulate without having to take a new measurement.

The present invention does not claim a right for a particular algorithm, but it does not claim the right to a particular algorithm, but provides accurate information and data for programming a real TLS (static or adaptive TLS with loop detection capability) or developing a new algorithm for controlling TLS in real time In the field of artificial intelligence).

These parameters are currently not available and will allow circulation, transportation, and computer professionals to create more accurate models and develop new and efficient algorithms.

The present invention provides the elements necessary to implement effective algorithms validated by simulation software. The present invention enables the management of complex TLS networks in practice.

Data is sent to the Control Center, which then processes it with the appropriate algorithms and sends instructions to the wireless devices installed at each intersection using a dedicated Internet network.

The invention has been described in sufficient detail to enable the public administration to implement its own work method without significantly changing the infrastructure.

This method can also be used in other situations to simulate the termination of urban planning studies, transportation plans or special events (sports, culture, festivals, parades, etc.). For ease of identification, the same number refers to the figure that represents the same part, and the invention is more readily understood with the following description.

Figure 1 is a proposal for a signal timing environment from prior art.
Figure 2 is an example of a vehicle ad hoc network (VANET) system.
Figure 3 is a view of the present invention.
Figure 4 is a view of the current invention that helps a traffic police officer to control the circulation.
Drawing. 5 is an example of the invention used to store data and program the current TLS.

In the figures provided with the following explanations, the numbers represent the same parts in the various figures.

Drawing. 1 shows the signaling time process plan 18 of the traffic signal timing manual issued by the 2009 "Traffic Engineering Institute". This figure shows the process that the current traffic lights should be realized to develop the system process, the program and the process that must be realized to develop, program and implement a traffic signal system (static or adaptive) with the current (detection loop function). . This process complies with the rules, standards, regulations, transportation laws, specific area considerations, operational and maintenance regulations and internationally recognized methods for traffic control and TLS.

Figure 2 shows how the VANET (ad hoc network of vehicles) works. There are three types of intercommunication:

- Inter - vehicle communication 22, 22 ' Each vehicle can receive status-related information from other vehicles every second (less than or equal to 0.1 second) within a range of about 300 meters.

- This information is transmitted to a communication station (RSU) installed along the road. 24,24 " This is the communication between the vehicle and the roadside.

- and the communication station 30 located along the delivery information of the road RSU to the base station 26 (wayside communication).

These data are information such as speed, acceleration, and braking system. This information is much more accurate than the data collected in the usual way (eg manual calculation, detection loop or source-destination survey). There is also a communication between a signal 25 traffic police officers towards the driver, which is a "traffic policeman Communication 25 toward the base 30 '' Communication of 25 traffic police officers towards the RSU.

Figure 3 shows a method 20 of the present invention used to indicate a traffic light; Each vehicle transmits an algorithm 38 to generate signals 40 , 40 ' used to program data 22 , 22' to other vehicles in the road, 24 , 24 ' to RSU 28 , and to program traffic lights 36 , 36' To the operating computer control center 34 . The first step is the phase of the VANET: the data that each vehicle provides and exchanges 22 , 22 ' is sent to the roadside equipment antenna 28 , 24 , 24' , and the roadside equipment antenna sends signal 26 to the base station 30 . The base station transmits signal 32 to control center 34 .

Figure 4 shows how the invention can be used to manage cycling events such as sporting events, culture, parades, construction fluctuations, demonstrations, etc.; The computer control center 34 analyzes the data 32 received from the base station 30 and sends 40 , 40 ' signals to each traffic police 42 , 42' to manage the traffic manually as the event progresses. In addition , when viewing the inter-vehicle communication 22, 22 ' , each vehicle can receive status information from other vehicles every second (0.1 sec or less) within a range of about 300 meters. The aforementioned information is sent to the roadside equipment 28 installed along the road, and the 24-way RSU transfer information 26 is used to control the traffic manually, while the TLS is not operational, This information is transmitted to the base station 30 (inter-road communication) which transmitted the information to the center 32 .

Drawing. 5 shows the database symbol 44 at the control center 34, and the traffic data 32 provided by the base station 30 is stored in the database 44 , and this data can be used to perform simulations in a simulator or to perform TLS in a manner that is currently performed on a static and adaptive system It can be used for programming tasks and so on. This data can also be used for urban research. In addition , when viewing the inter-vehicle communication 22, 22 ' , each vehicle can receive status information from other vehicles every second (0.1 sec or less) within a range of about 300 meters. The information mentioned above is transmitted to the communication station, roadside device installed along the road, 24,24 ' This is the communication between the vehicle and the roadside. The road RSU forwarding information 26 is then transmitted to base station 30 (inter-side communication) which has transmitted this information to the 32 computer control center and database 44 . This database is used to store data and carry out simulations, such as how it is currently performed on static and adaptive systems. This data can also be used for urban research.

SUMMARY OF THE INVENTION

The present invention is a method of programming a traffic light using data provided through a vehicle ad hoc network (abbreviated as VANET), a system, or a method comprising the following steps:

a. VANET transmits data to a computer control center that operates the algorithms used to intervene in the programming of the traffic light system. Such data can be transmitted to the computer control center or the sidewalk device via a radio tower. The frequency of the transmission may be an approved frequency in accordance with the current standard IEEE 802.11p, as in the operation of the VANET. These standards may be modified, revised, updated or replaced over time by the responsible authority of VANET.

b. We use algorithms to process these data. An algorithm based on the average occupancy of each road segment can be used (for example), but any exact algorithm can be used at the choice of city, government agency or public administration.

c. Establish a secure communication system between the computer control center and the traffic light system. A dedicated Internet network or wireless communication is a secure communication system that can be used at this stage. This secure communication system may be fiber optic or it may be a valid security method that is encrypted or recognized.

d. Install the wireless device at each intersection on the road that points to the traffic light. These traffic light systems can be static, semi-active or fully-active systems.

e. A secure communication system sends the signal provided by the algorithm to the wireless device.

This invention minimizes the risk of signal loss. Data can be obtained at any time through this invention. These data are related to speed, acceleration, braking system, and so on. This data from the VANET can be transmitted to the computer control center in real time with a minimum frequency of 0.1 second. These data enable you to program your current TLS according to the process recommended by the Transportation Engineer Institute (Figure 1). This data and this system also allows you to control TLS in real time.

The invention is used to manage traffic lights during events such as sports events, culture, parades, construction confusion or protests. A decision-making center is set up to provide comprehensive essential information to traffic police officers who control traffic when the event takes place. The invention can also be used for urban research and transportation research planning.

The data provided by the VANET can be stored in database 44 and used in simulators to more accurately represent actual traffic flows and driver behavior than current assumptions based on statistical methods (eg Poisson's Law).

This data is used to facilitate the circulation of the entire cycle by allowing the vehicle to cycle more simultaneously by handling traffic information at the computer control center and by sending a message to the vehicle driver to adjust the vehicle's travel.

These data are used to transmit the signals to autonomous vehicles to process the traffic information of the computer control center mentioned above, to adjust the speed and to facilitate traffic flow.

These data are used to signal traffic to the above-mentioned computer control center, to signal the driver to adjust the speed and facilitate traffic flow.

These data are used to signal the TLS to modify the programming of the traffic lights to process the above-mentioned computer control center traffic information and to facilitate the flow of the entire traffic.

The present invention processes the traffic information of the control center, transmits a message to the driver, transmits a signal to the autonomous vehicle, corrects programming of the traffic lights, controls the system at the entrance, . The present invention replaces the need to collect traffic data manually or through sensors or other means to program a static traffic light system in accordance with the method in force.

In the present invention, standard IEEE 802.11p may be modified, revised, updated, renamed or replaced over time by the responsible authority of VANET.

In the present invention, the standard IEEE 802.11p may be modified and the standard may be revised, updated, renamed or replaced in accordance with the provisions of the International Standardization Organization, which may be different in some countries or regions. Regardless of its name).

It should be appreciated that an immediate description of the attached drawings is presented in a straightforward manner and that the preferred implementations described in this document are not intended to limit in any way other implementations feasible within the scope of the present invention. Issues that are creative and new are limited to the following claims.

18 Prior art, signal timing process
20 The method of the present invention
22, 22 ', 22'',22''' inter-vehicle communication
24, 24 ', 24'',24''' vehicle-road communication
25 Police officer's communication towards the driver
25 'Police Communications for Roadside Antennas
25 '' Police officer's communication to base station
26,26 'Roadside-to-base station communication
28, 28 ', 28'',28''' Roadside Antenna or Roadside Device - RSU
30 base station
32 signal
34 Control Center
36,36 'Traffic signal
38 algorithm
40 Signal Generation with Algorithm
42,42 'Traffic police officer
44 Database symbols

Claims (28)

Vehicle Ad Hoc Network As a method of programming traffic lights with VANET data, the following steps are included:
a. The computer control center, which operates the algorithm used to program the traffic signals, transmits the data of the VANET,
b. Using the algorithms mentioned above to process,
c. Building a secure communication system between computer control center and traffic lights,
d. The wireless device is installed at each intersection of the road indicating the traffic light,
e. The signal provided by the algorithm through a secure communication system is transmitted to the wireless device,
These methods allow you to manage your circulation traffic in real time and retrieve your data at any time to create simulation scenarios as needed. The method of Claim 1, wherein the data of said VANET is transmitted in real time to said computer control center at a minimum frequency of 0.1 second. The method of Claim 1 is used to manage the traffic lights during the event. Claim 3 if the event mentioned above is a sport, culture, parade, construction or demonstration.  Method 1 of claim 1 or 3 if the signal light mentioned above is static. Method of claim 1 or 3 if the aforementioned signal light is semi-emissive. Method 1 of claims 1 or 3 if the aforementioned signal light is fully sensitive. Claims 1 or 2 wherein the aforementioned data is transmitted via a wireless telecommunication tower. Method of claims 1, 2 or 8, where the data mentioned above is information relating to the vehicle's speed, acceleration, position and control system. The method of claim 1 if the algorithm mentioned above is based on the average occupancy of each road segment. Claim 1 if the aforementioned communication system is a dedicated Internet network. Method of Claim 1 if the aforementioned communication system is wireless communication. The method of claim 1, wherein the data received from the aforementioned VANET is transmitted to the computer control center in real time at an approved frequency in accordance with the current standard IEEE 802.11p. The method of claim 1 is used to carry out urban studies and plan transportation studies. If a decision-making center is provided to provide comprehensive essential information to traffic police officers who control traffic when the aforementioned events are being conducted, A method of claim 1, wherein claims 1 to 15 are used when the aforementioned data is used in a traffic circulation simulator. In the case where the above-mentioned data adjusts the driving of the vehicle by processing the traffic information at the above-mentioned computer control center and sending a message to the driver of the vehicle so that the vehicle simultaneously circulates better and promotes the circulation of the entire circulation. One of the methods of claim. A method of claim 1, wherein said data is used to transmit signals to an autonomous vehicle in order to process traffic information, speed up and facilitate traffic flow in said computerized control center. A method of claim 1, wherein the aforementioned data is used to signal traffic to the driver to process traffic, adjust speed and facilitate traffic flow at the aforementioned computer control center. When the aforementioned data are used to transmit traffic signals to the TLS to modify the programming of the traffic lights to process traffic information and facilitate the flow of traffic in the above-mentioned computer control center, a claim of any one of Claims 1 to 19 Way. Control centers handle traffic information, send messages to drivers, transmit signals to autonomous vehicles, modify the programming of traffic lights, control the system of entrances, exit highways, and facilitate traffic flow The method of one of claims 1 to 20 is used. The method of either claim 1 through 20 replaces the need to collect traffic data manually or through sensors or other means to program a static traffic light system according to the method in force. Claim 1 if the aforementioned secure communication system is an optical fiber. Method of Claim 1 if the communication system mentioned above is a security measure. Method of Claim 24 if the aforementioned security measures are encrypted. Method of claim 24 if the security measures referred to above are recognized and valid security measures. A claim of any of claims 1 to 26 in which the aforementioned standard IEEE 802.11p can be modified, revised, updated, renamed or replaced over time by the responsible authority of the VANET. The standard IEEE 802.11p mentioned above may be modified and the standard referred to above may be revised, updated, renamed or replaced in accordance with the provisions of the International Standardization Organization, which may be different in some countries or regions Regardless of the name given to it) if any of claims 1 to 27 of the method

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