EP2188798A1 - Traffic guidance system - Google Patents

Traffic guidance system

Info

Publication number
EP2188798A1
EP2188798A1 EP08803070A EP08803070A EP2188798A1 EP 2188798 A1 EP2188798 A1 EP 2188798A1 EP 08803070 A EP08803070 A EP 08803070A EP 08803070 A EP08803070 A EP 08803070A EP 2188798 A1 EP2188798 A1 EP 2188798A1
Authority
EP
European Patent Office
Prior art keywords
information
traffic
traffic light
vehicle
meta
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08803070A
Other languages
German (de)
French (fr)
Inventor
Ulrich STÄHLIN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Teves AG and Co oHG
Original Assignee
Continental Teves AG and Co oHG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE102007041359 priority Critical
Application filed by Continental Teves AG and Co oHG filed Critical Continental Teves AG and Co oHG
Priority to PCT/EP2008/060779 priority patent/WO2009027253A1/en
Priority to DE102008037883A priority patent/DE102008037883A1/en
Publication of EP2188798A1 publication Critical patent/EP2188798A1/en
Application status is Withdrawn legal-status Critical

Links

Classifications

    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/09Arrangements for giving variable traffic instructions
    • G08G1/0962Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0967Systems involving transmission of highway information, e.g. weather, speed limits
    • G08G1/096766Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission
    • G08G1/096791Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission where the origin of the information is another vehicle
    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/09Arrangements for giving variable traffic instructions
    • G08G1/095Traffic lights
    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/09Arrangements for giving variable traffic instructions
    • G08G1/0962Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0967Systems involving transmission of highway information, e.g. weather, speed limits
    • G08G1/096708Systems involving transmission of highway information, e.g. weather, speed limits where the received information might be used to generate an automatic action on the vehicle control
    • G08G1/096716Systems involving transmission of highway information, e.g. weather, speed limits where the received information might be used to generate an automatic action on the vehicle control where the received information does not generate an automatic action on the vehicle control
    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/09Arrangements for giving variable traffic instructions
    • G08G1/0962Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0967Systems involving transmission of highway information, e.g. weather, speed limits
    • G08G1/096708Systems involving transmission of highway information, e.g. weather, speed limits where the received information might be used to generate an automatic action on the vehicle control
    • G08G1/096725Systems involving transmission of highway information, e.g. weather, speed limits where the received information might be used to generate an automatic action on the vehicle control where the received information generates an automatic action on the vehicle control
    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/09Arrangements for giving variable traffic instructions
    • G08G1/0962Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0967Systems involving transmission of highway information, e.g. weather, speed limits
    • G08G1/096733Systems involving transmission of highway information, e.g. weather, speed limits where a selection of the information might take place
    • G08G1/096741Systems involving transmission of highway information, e.g. weather, speed limits where a selection of the information might take place where the source of the transmitted information selects which information to transmit to each vehicle
    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/09Arrangements for giving variable traffic instructions
    • G08G1/0962Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0967Systems involving transmission of highway information, e.g. weather, speed limits
    • G08G1/096733Systems involving transmission of highway information, e.g. weather, speed limits where a selection of the information might take place
    • G08G1/096758Systems involving transmission of highway information, e.g. weather, speed limits where a selection of the information might take place where no selection takes place on the transmitted or the received information
    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/09Arrangements for giving variable traffic instructions
    • G08G1/0962Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0967Systems involving transmission of highway information, e.g. weather, speed limits
    • G08G1/096766Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission
    • G08G1/096783Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission where the origin of the information is a roadside individual element
    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/09Arrangements for giving variable traffic instructions
    • G08G1/0962Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0965Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages responding to signals from another vehicle, e.g. emergency vehicle

Abstract

Traffic light installations for generating metainformation on the basis of input information about the surroundings of the traffic light installation. The traffic light installation acts as a data pool and can use the information measured by it or obtained from adjacent vehicles to independently simulate a road section. From the input information, the traffic light installation can also generate metainformation which is communicated to other vehicles and thus results in a constant flow of traffic.

Description

traffic Management System

Field of the Invention

The invention relates to the traffic guidance and assistance technology for vehicles. In particular, the invention provides a traffic signal system, a security system for a vehicle, a method for generating meta-information, a program element and a computer-readable medium is concerned.

technological background

In road traffic situations often arise in which the driver has to react in order to avoid an accident. Thus, it can happen, for example, that a broken-down vehicle is located behind a blind curve. It may, for. B. happen that an emergency vehicle travels through an intersection, although the traffic light is set to red. Also, the case may occur that leaves, grit, oil, ice o. Ä. A particular region of a road changed in a critical way, without that this could be predicted by any driver.

In these or similar situations, the driver must respond quickly and appropriately to avoid an accident.

Summary of the Invention

It is an object of the invention to provide an improved safety in road traffic.

There are a set of traffic lights, a security system for a vehicle, a method for generating meta-information to increase the road safety, a program element and a computer-readable medium according to the features of the independent claims. Further developments of the invention result from the subclaims.

The described embodiments apply equally to the security system, the traffic signal system, the method, the program element and the computer readable medium. According to an embodiment of the invention, a set of traffic lights for generating meta-information is given on the basis of input information, the input information relating to the environment of the traffic lights. The traffic light system is particularly suitable for increasing road safety and for providing a constant flow of traffic. The traffic light system has a control unit for generating the meta information on the basis of the input information, and a communication unit for transmitting the meta information to neighboring vehicles or adjacent traffic light installations, wherein the meta information is executed for generating a constant flow of traffic.

In other words, the traffic light system is designed such that it can worry about the meta-information generated by it that the driving in the traffic light vehicles always have information about the optimal speed. In this way, traffic jams can be avoided, and fuel can be saved.

According to a further embodiment of the invention, the input information includes information sent from a vehicle to the traffic lights.

In other words, neighboring vehicles to monitor the vehicle's surroundings and send relevant information to the traffic lights. This information is then analyzed in the traffic light system and further processed. The result of the processing is then over a radio (broadcast) sent to all neighboring vehicles so that they can adjust their speeds accordingly optimal.

According to a further embodiment of the invention, the input information via short-range communications are transmitted to the traffic lights. For example, the wireless transmission of the vehicles made at the traffic lights (and back) via WiMax, Bluetooth or DSRC (Digital Short Range Communication), or even via GSM, UMTS, LTE or Wi-Fi (z. B. 802.11 p).

The vehicles, for example, a motor vehicle such as car, bus or truck, or even a rail vehicle, a bicycle or a motorcycle. According to a further embodiment of the invention, the input information includes an information about the fact that it is the vehicle is an emergency vehicle (such as ambulances, police cars, fire trucks) is.

In this case, the traffic light can perform, for example, a Freiwegschaltung for the emergency vehicle at a traffic light junction.

According to a further embodiment of the invention, the input information monitoring data of the surroundings of the traffic signal system, which receives the traffic lights on its own sensors.

For this, the traffic light is equipped for example with one or more cameras with which the traffic light system can determine the flow of traffic density and the speed of each vehicle. Other sensors may be provided, such as light barriers, with the help of the traffic flow can be measured.

In this way it is possible that the traffic light system performs a traffic flow control, but not in this case rely on data from adjacent vehicles. Rather, the traffic light system performs all measurements themselves. Of course, the traffic light system can also evaluate both data sets and in their calculation include (the one hand, the measured data set itself and on the other hand, the data transmitted from the adjacent vehicles).

According to a further embodiment of the invention, the meta information includes a speed recommendation for the neighboring vehicles. These

Speed ​​recommendation may for example be individualized. For example, can be transmitted to the vehicles on a first road another speed recommendation as for vehicles that are located on a different road. Just this may also apply to different lanes.

According to a further embodiment of the invention, the meta-information for automatically controlling a driver assistance system, or for setting a speed control (ACC, Adaptive Cruise Control) is carried out of a receiving vehicle. In this way it is ensured that each vehicle always runs at the optimum speed without the driver having to intervene in this case.

According to a further embodiment of the invention, when the traffic light system by a mobile traffic lights. For example, here at traffic lights are to be understood to be temporarily placed at construction sites or hazards.

According to a further embodiment of the invention, the traffic lights on one or more data memory for storing and collecting the input information, wherein the control unit of the traffic signal system for creating a digital map of the surroundings of the traffic signal system is designed on the basis of the input information.

In other words, the (mobile) traffic lights can create their own digital map and track the road train or the crossing, on which it is installed himself. This is particularly advantageous for mobile traffic lights which have no or outdated digital map.

In particular, the traffic light system is capable of learning by means of its own measurements and / or with the aid of information that it gets transmitted from neighboring vehicles, simulates the road network around them.

According to a further embodiment of the invention the control unit for analyzing the input information is executed and can determine on the basis of this analysis, whether the vehicle is moved toward the traffic lights or not.

In other words, the control unit can determine whether the vehicle will pass the traffic light in the near future or, for example, is moving on a parallel road.

According to a further embodiment of the invention, the communication unit of the traffic signal system for networking several traffic lights is performed together. The network is implemented for example via the Internet using the Internet Protocol.

In this way it is possible that a bailout or a selected vehicle is tracked from one traffic light and it is ensured that the corresponding lights are always switched to green. In particular, important information can be passed from traffic light to traffic light.

thus, it can be formed at traffic lights a self-regulating network, which is capable of automatically setting an optimum traffic flow.

According to a further embodiment of the invention, a security system for a vehicle is provided, which is designed to communicate with an above-described traffic lights. The security system comprises a communication unit for automatic transmission of information to the traffic light and receiving meta information of the traffic lights and a control unit for automatically evaluating the meta information transmitted from the traffic lights. The control unit further serves to generate a control signal for assisting the driver of the vehicle based on the received meta-information.

For example, the security system can warning information received by the traffic lights. This warning information may include for example, position information of the danger zone. For example, the security system can decide whether, or at what time of the warning to the driver or a driver assistance system of the vehicle is to be communicated in this manner. Here is also the direction of movement of the other vehicle from

Importance. If it is at the other vehicle, for example, an emergency vehicle (such as an ambulance, a police car or fire engine), which is not moving towards the vehicle, but away from it, or is located on an adjacent road, not to the lead vehicle, the alarm signal of the safety system can indeed be noted. Under certain circumstances, decides the security system that no further action is required.

In the control signal generated by the control unit for assisting the driver, it may be for example an audible signal, a visual signal for display to the driver to an entry in a digital map to a general information, or else a control signal for act a driver assistance system (a combination of the above options or). For example, can be made in the vehicle with the help of the control signal changes in the ABS or ESP settings. For example, the standard coefficient of friction for ABS and ESP are subject to change. Even the set cruise control speed or the minimum tolerance for the ACC (Automatic Cruise Control) can be adjusted to the vehicle ahead using the control signal.

According to a further embodiment of the invention the message transmitted from the traffic light warning information includes information about the fact that a vehicle is at or below a predetermined minimum speed.

In order to decide that warning information is to be sent, the traffic lights on a corresponding sensor which measures, inter alia, the speed of vehicles and compares with an average of the measured speed. now decreases the actual measured speed of the vehicle falls below a certain minimum value (which can vary from street to street), or the vehicle is actually on the road, a corresponding

Warning information issued together with the vehicle position. This signal can be received by the neighboring vehicles, and then the driver will be warned (optical or acoustic) and, if necessary, control signals are generated to the driver assistance units in order to avoid an accident.

The warning for the individual driver to an optical manner (via an appropriate display, acoustic and / or z. B. haptically (for example, be in the form of a vibration of the seat or steering wheel). Also, an entry in a digital map of the vehicle can be carried out on which the information and the item can be found of the danger zone.

The term "digital map" are also maps for advanced driver assistance systems (ADAS, Advanced Driver Assistance Systems) to understand without actually taking navigation.

It should also be noted that in the context of the present invention GPS is representative of all global navigation satellite systems (GNSS) is such. B. GPS, Galileo, GLONASS (Russia), Compass (China), IRNSS (India) ... According to another embodiment of the invention, a method for generating meta information on the basis of input information on the environment of a traffic light system is shown in which input information is generated meta-information is generated based on the input information by the traffic lights and the meta-information is transmitted to adjacent vehicles. This meta-information used to generate a constant flow of traffic in the vicinity of the traffic lights.

In this way, security can be increased in traffic. Furthermore, gasoline can be saved, since the vehicles travel at optimum speed.

According to a further embodiment of the invention a program element is specified which, when executed on a processor of a traffic signal system, instructs the processor to perform the steps described above.

According to a further embodiment of the invention a computer readable medium is provided, on which a program element is stored which, when executed on a processor of a traffic signal system, instructs the processor to perform the method steps given above.

Here, the program element z. For example, be part of a software stored on a processor of the traffic lights. The processor can be just as subject of the invention. Furthermore, this embodiment of the invention, a program element which is used from the beginning, the invention, as well as a program element, which by an update (Update) prompts an existing program for use with the invention.

In the following preferred embodiments of the invention are described with reference to the figures.

BRIEF DESCRIPTION OF FIGURES

Fig. 1 shows a schematic representation of a security system according to an embodiment of the invention. Fig. 2 shows a representation of a traffic light installation, and vehicles according to an embodiment of the invention.

Fig. 3 shows two vehicles in accordance with an embodiment of the invention.

Fig. 4 shows a traffic light system with two vehicles according to another embodiment of the invention.

FIG. 5 shows two vehicles according to another embodiment of the invention.

Fig. 6 shows a flow chart of a method according to an embodiment of the invention.

Fig. 7 is a diagram illustrating components of a traffic light system according to an embodiment of the invention.

Detailed description of embodiments

The illustrations in the figures are schematic and not to scale.

In the following figure description, the same reference numerals are used for the same or similar elements.

Fig. 1 shows an illustration of components of a security system 100 that is installed for example in a vehicle. The safety system 100 includes a control unit 140, a communication unit 122 with an antenna 123 and a position determining unit 106th

The data to be transmitted, which are transmitted from the control unit 140, which is embodied for instance in the form of a CPU to the communication unit 122 may be encrypted using an encryption device 121st Likewise, the received data which are transmitted from the communication unit 122 to the control unit 140 can be decrypted from the encryption unit 121st In this way, the risk of misuse can be reduced. In particular, it can be ensured in this way that only information of vehicles are used which have actually installed a corresponding security system.

To the control unit 140, an input unit 126 is connected. Through the input unit 126, various settings of the security system 100 can be made and, if necessary on an associated navigation unit 120th

Further, a visual output unit in form of a monitor 128 is provided, on which, for example, route guidance information may be output. In addition, the routing information can also be output via the audible output unit 127th In addition to routing information and warnings to the driver can be issued. The output via the audible output unit 127 has the advantage that the driver is less distracted by the current traffic situation the advantage.

In a memory element 124, which is connected to the control unit 140 or is integrated in the control unit 140, the digital map data (for. Example, as a navigation map data) in the form of data records are stored, and for example in the memory element 124 also additional information on traffic restrictions, infrastructure (traffic lights, etc.) and the like stored and associated with the data sets.

Furthermore, a driver assistance system 120 is provided which is supplied with the digital map data and for example also with the transmitted from the traffic lights meta information (for example, alarm information and position data and a recommended directional speed) as well as measured by the own vehicle sensor information.

For determining the current vehicle position, the security system 100, a navigation unit 120 comprising a satellite navigation receiver 106 which is adapted for receiving positioning signals from satellites, for example, Galileo or GPS satellites. Of course, the satellite navigation receiver 126 may be performed for other satellite navigation systems.

The satellite navigation receiver 106 is connected to the control unit 140th Also, the navigation unit 120 is connected to the control unit 140th Furthermore, there is a direct connection between the navigation unit 120 and the satellite navigation receiver 106. Thus, the GPS signals can be transmitted directly to the CPU 140th

Since positioning signals can not always be received, for example, in urban areas, includes the sensor 119 of the communication device 100 for carrying out a dead reckoning also has a direction sensor 107, a distance sensor 108, a steering wheel angle sensor 109, a travel sensor 102, an ESP sensor 103 and possibly an optical detector 104, for example in the form of a camera, on. Also, a beam sensor 105 (radar or lidar sensor) may be provided. Furthermore, the sensor 1 19 a speedometer one hundred and first

The GPS receiver 106 and the other sensors signals are processed in the control unit 140th The vehicle position ascertained from said signals is aligned on map matching with the road map. The routing information obtained is finally output via the monitor 128th

Fig. 2 shows a traffic light 700 with three lights 204, 205, 206. The three lights each have their own transmitting and receiving device with a corresponding computing unit 207, 208, 209. Also, the traffic lights or even several traffic lights can be connected to a central processing unit which also includes a central transmission and

having receiving unit. A corresponding electronics is shown in Fig. 7 in more detail.

Each of the three vehicles 201, 202, 203 shown has its own security system 100, which is integrated in the vehicle.

Vehicles communicate with each other and the traffic lights via a wireless communication link 210th

In the vehicle 203 is, for example, be a stand retarded verunfalltes vehicle. The vehicle 202 is, for example, an emergency vehicle, which is located on the way to the scene. In the vehicle 201 is, for example, be a normal road users, however, can not see the accident site and does not perceive even the approaching emergency vehicle. The adjacent vehicles will be informed by the security system 100 of the vehicle 203 that this vehicle had a rear-end collision and came to a halt in the middle of the road. Of these, the driver of the vehicle 201 and the driver of the emergency vehicle 202 is informed. Also, the relevant driver assistance systems of the two adjacent vehicles 201, 202 informed accordingly so that they can intervene if the driver does not do this.

The emergency vehicle 202 approaches the traffic lights 204, 205, 206 and sends a corresponding signal to the traffic light, after which the traffic lights are switched 205 to green and the traffic signals 204 and 206 to red, so that the vehicle 202, the intersection can pass unhindered. From the traffic lights, the safety system of the vehicle 201 is set in good time so that it can adjust the speed of the vehicle 201 optimal (so that the driver of the vehicle 201 does not have to stop or slow down, for example, the car because it is the traffic lights approaching slowly enough to maintain the flow of traffic).

Fig. 3 shows two vehicles 201, 203, each equipped with a security system 100. The stationary vehicle 203 transmits its position to a corresponding warning notice 302 to the up zubewegende it vehicle 201. The moving in the direction 301 the vehicle 201 receives the warning signal, and outputs a warning to the driver from (for example in the form of an optical character, as well as an entry in the digital map). The driver assistance unit shall be informed at the same time so that they can intervene in the driving process.

Fig. 4 shows two vehicles 201, 202 approaching an intersection. The vehicle 202, in which it is an emergency vehicle, sends its security system 100 of the signal that it is an emergency vehicle.

Since the two vehicles 201, 202 move in direction 401 and 402 perpendicular to each other, the vehicle must be 201 to reduce its speed to avoid an accident.

This can be done fully automatically, by on the one hand the emergency vehicle 202 controls the traffic light 204, 205 accordingly, and on the other hand the vehicle 201, both obtained from the emergency vehicle 202 as well as the traffic light information, on the basis of which it can adjust its speed optimal.

The vehicle 201 can then display an alarm and information about the direction from which the emergency vehicle arrives and inserts this information in the digital card. Traffic lights transmit their status to both vehicles. The two vehicles can react to the traffic light status and display in the digital map.

FIG. 5 shows two vehicles 201, 202, each with a security system 100. Both vehicles are moving with different speeds in the same direction 501 and 503, respectively.

The leading vehicle 202 is located in a region 502 having a low friction coefficient. This is detected by the vehicle sensor, and it is transmitted to a corresponding warning signal with a position indication 504 to the vehicle behind the two hundred and first In particular, information is transmitted on road conditions.

The condition of the road surface is detected for example by an ABS braking maneuver. If the detected information is considered critical (thus it can in the preceding vehicle 202 an analysis of the detected data take place), a corresponding warning signal is issued with position indication and received from behind the vehicle in front two hundred and first

Thereafter, the behind vehicle 201 reacts, for example by triggering an alarm in the form of an optical signal or by the accelerator pedal is pushed up by the vehicle electronics. Additionally or alternatively, an audible signal can be delivered. Furthermore, the standard coefficient of friction for ABS or ESP can be changed. The set speed and / or the set distance for ACC can be changed. Of course, the position of the point of operation can be entered in the digital map 502nd

Fig. 6 shows a flow chart of a method according to an embodiment of the invention. In step 601, input information is measured from an adjacent vehicle and transmitted to the traffic lights. In step 602, the traffic light system further input information generated by its own measurements. In step 603, the traffic lights generated meta-information based on the input information and sends in step 604, the meta information to neighboring vehicles, wherein the meta information is executed for generating a constant flow of traffic.

Fig. 7 shows a schematic view of components 700 of a traffic light installation. The components shown in Fig. 7 may be installed in each individual lights of the traffic lights or in a central traffic light or a (external traffic light) the central station.

The components shown a control unit 701 which is embodied for instance in the form of a CPU, a memory 704, a sensor in the form of a camera or radar 703 and a communication unit 702 with an antenna 705 and an encoder 706.

The encoder 706 in this case corresponds to the encoder 121 of FIG. 1, the vehicle security system 100.

The other elements (memory controller 701, sensors 703 and communication unit 702) can as the corresponding components in the vehicle security system 100 is implemented to be (the memory 124, CPU 140, communication unit 122, camera 104).

The control unit 701 controls the traffic lights on the one hand, the signal circuit of the traffic lights. On the other hand, the control unit 701 generates the meta information that is sent via the communication unit 702 to the neighboring vehicles.

About the encryption engine 706 can be assured that the vehicles take only meta-information from verified traffic lights note. Abusive transmitted data are identified and discarded.

To assign an emergency vehicle or another vehicle a certain Kreuzungsarm, for example, a direction-based algorithm is used. Specifically, the control unit 701 of the traffic light system also perform a learning algorithm which is generated by communication with civil road users a digital environment map. After the learning process, the mapping is based on the learned map, whereby a correct operation is possible even at very specific intersection scenarios.

The traffic lights watching the traffic around them. To monitor environmental sensors, such as cameras and radar are used. The information from other vehicles can be used (C2X) are sent to the traffic lights on vehicle-to-infrastructure communication.

If a certain friction coefficient detected and transmitted by C2X for example in the area of ​​traffic lights, on the traffic lights buffers this friction and passes it on again as soon as another vehicle approaches. Similar procedure can also be other events.

Likewise, it can be concluded from the speed of passing vehicles for possible friction. Drive the vehicles much more slowly than it would allow the road class and traffic density, can be closed to a lower coefficient of friction or other bad weather conditions. This information can then by means of short-range communication (C2X) are passed on to other vehicles or adjacent traffic light installations.

Since the traffic lights observed the traffic flow over a longer period, it can determine the average traffic flow density. this result deviations in the direction of a lower speed, which can not be attributed to a higher density of vehicles, it can be concluded that a dangerous point. This information can then be transmitted by C2X.

Speed ​​recommendations can be derived from the information obtained. Thus, can. As the average speed will be passed in the region considered as a recommendation, with legal regulations must be observed here. This means that no rates are recommended not allowed. Even with recognized danger spots, the speed can be recommended to take the other vehicles in this area. The recommendation can either be forwarded by means of C2X or displayed at an infrastructure unit via a shield. This recommendation can then z. B. be set directly in an ACC of a receiving vehicle or be brought to the driver for display.

By using the information for. B. sent from parked vehicles or vehicles in a traffic jam at the traffic lights system, information can be determined, with the help of the traffic flow rate to be optimized without the need for additional infrastructure units must be installed. Characterized the density of the infrastructure entities can be reduced.

In the following, further embodiments of the invention are described:

First example:

A vehicle is stuck in traffic, but can observe with his camera and his radar oncoming traffic. With these sensors, the vehicle can the

determine the average speed on the opposite lane and passes them as per C2X

Recommendation to the traffic lights on. If the measured average speed of the traffic changes suddenly, the vehicle sends out a warning to the traffic lights.

From these data, the traffic light can then generate appropriate metadata for adjacent vehicles and send out.

Second example:

An infrastructure unit (such as a traffic light) determined using cameras, the traffic density and the mean velocity at one point and passes them on via C2X. This data is stored for a longer period in the infrastructure unit. One day, a significant deviation from these stored and typical values ​​obtained. The traffic light system sends in this case a warning

(Meta-information) from the adjacent vehicles, since it is assumed that a source of danger. Likewise, a recommended recommended speed of the individual vehicles is emitted. Third example:

An infrastructure unit monitors the speed of the vehicles in one place. In addition, as the structurally related maximum speed may be at this point is known (eg. As a curve). Now result deviations of the maximum velocity at this point, which can not be explained by the flow of traffic and in addition, over a prolonged period (eg, several minutes), stop, can be assumed by a lower coefficient of friction and the infrastructure unit (traffic light) sends a warning.

Fourth example:

A vehicle is parked in a parking lot. The C2X unit of the vehicle is, however, still powered and receives the positions, speeds, etc. of the passing vehicles. This determines the C2X unit a

Average speed detected deviations, and thus dangers, etc. and forwards this information. If the supply voltage drops below a predetermined level, the information so far obtained are sent one last time. It is thereby also made clear that it is a last sending. In this case, internal variables as z. As a recursive calculation

Average speed necessary sent. Other parked vehicles (or traffic lights) can continue with this information then the determination. This ensures that can take place quasi-stationary determination of the information itself with changing parked cars (or cars in a traffic jam or changing traffic lights) and an infrastructure unit can be replaced. Instead of a parked vehicle, a mobile traffic lights can also be used for example.

It should additionally be noted that "comprising" and "comprising" does not exclude other elements or steps and "a" or eliminates "a" no plurality. It should also be noted that features or steps with reference to one of the above

Embodiments have been described, can also be used in combination with other features or steps of other exemplary embodiments described above. Reference signs in the claims are not to be construed as limitations.

Claims

claims
1. traffic lights for generating meta information on the basis of input information on the surroundings of the traffic lights, the traffic light installation (700) comprising: a control unit (701) for generating the meta information on the basis of
Input information; a communication unit (702) for transmitting the meta information to neighboring vehicles; wherein the meta information is executed for generating a constant flow of traffic.
2. traffic light system according to claim 1, wherein said input information from a vehicle (201, 202, 203) to the traffic light (700) transmitted information.
3. traffic light system according to claim 1 or 2, wherein the input information to the traffic light system via short-range communications (700) to be transmitted.
4. traffic light system according to any one of the preceding claims, wherein the input information includes information as to that in the vehicle (202) is an emergency vehicle.
5. traffic light system according to any one of the preceding claims, wherein the input information monitoring data of the surroundings of the traffic signal system
(700) which receives the traffic lights on its own sensor (703).
6. traffic light system according to any one of the preceding claims, wherein the meta information includes a speed recommendation for the neighboring vehicles.
7. traffic light system according to any one of the preceding claims, wherein the meta information for automatically controlling a driver assistance system (125), or for setting an ACC of a receiving vehicle (201, 202, 203) is executed.
8. traffic light system according to any one of the preceding claims, wherein it is a mobile traffic light at the traffic lights (700).
9. traffic light system according to any one of the preceding claims, further comprising: a data memory (704) for storing and collecting the input information; wherein the control unit (701) for creating a digital map of the environment of the
Traffic lights is performed based on the input information.
10. traffic lights according to one of the preceding claims, wherein the control unit (701) is configured to analyze the input information and may determine based on the analysis, whether the vehicle (202) moves toward the traffic light.
1 1. traffic light system according to any one of the preceding claims, wherein the communication unit (702) for networking a plurality of traffic light systems (700) is executed with one another.
comprising 12. Safety system for a vehicle for communication with a traffic light system according to any one of claims 1 to 1 1, the security system comprising: a communication unit (122, 123) for automatically transmitting information at the traffic light installation (700) and receiving meta information of the traffic lights (700); a control unit (140) for automatically evaluating the of the traffic light (700) transmitted meta-information; wherein the control unit (140) further for generating a control signal for assisting the driver of the vehicle (201, 202, 203) is executed on the basis of the meta information.
13. A method for generating meta information on the basis of input information on the environment of a traffic signal system, the method comprising the steps of:
Generating the input information; Generating the meta information on the basis of the input information by the traffic lights;
Transmitting the meta-information to neighboring vehicles; wherein the meta information is executed for generating a constant flow of traffic.
14. A program element which, when executed on a processor of a traffic light installation according to one of claims 1 to 11, instructs the processor (701) to perform the steps of: generating the input information;
Generating the meta information on the basis of the input information by the traffic lights;
Transmitting the meta-information to neighboring vehicles; wherein the meta information is executed for generating a constant flow of traffic.
15. The computer-readable medium on which a program element is stored which, when executed on a processor of a traffic light installation according to one of claims 1 to 11, instructs the processor (701) to perform the steps of: generating the input information;
Generating the meta information on the basis of the input information by the traffic lights;
Transmitting the meta-information to neighboring vehicles; wherein the meta information is executed for generating a constant flow of traffic.
EP08803070A 2007-08-30 2008-08-15 Traffic guidance system Withdrawn EP2188798A1 (en)

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DE102008037883A DE102008037883A1 (en) 2007-08-30 2008-08-15 Mobile traffic light installation for e.g. communicating with security system of ambulance, has communication unit to transmit meta information to proximate vehicle, where meta information is processed for producing constant traffic flow

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US8330622B2 (en) 2012-12-11

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