Method and system for filtering data by an ego vehicle in a dangerous event situation such as a traffic jam

Abstract

Title: Process and system for filtering data by a vehicle in a hazardous event situation such as a traffic jam. This process and system for filtering data by a vehicle in a hazardous event situation such as a traffic jam includes the detection of a hazardous event, the preparation of a communication relating to said event intended for at least one target, the verification of the validity of the detected hazardous event, and the transmission of the prepared communication to at least one target when it is detected that the hazardous event is valid, or the cancellation of the transmission when the hazardous event is invalid. No figure for the abstract.

Description

Title of the invention: DESCRIPTION

[0001] TITLE: Method and system for filtering data by an ego vehicle in a hazardous event situation such as a traffic jam

[0002] The invention relates to a method of filtering data by a vehicle in the event of an approaching hazardous event. The invention also relates to a filtering system capable of implementing such a method. The invention further relates to a vehicle equipped with such a system.

[0003] In the automotive sector, technologies designed to ensure driver safety based on communication between a vehicle and its environment, particularly with a remote server, neighboring vehicles, or elements of the road infrastructure, are increasingly used. Typically, the vehicle is equipped with a driver assistance system, or advanced driver assistance system (ADAS). Such a system is capable of detecting an approaching dangerous event, alerting the driver, maneuvering the vehicle as needed in response to such an event, and optionally informing neighboring vehicles of the situation related to said event, either directly or indirectly, notably via a remote server.For example, but not limited to, the events concerned may relate to traffic jams, risky braking, emergency vehicles, slippery roads or snowy roads.

[0004] In the case of vehicle-to-vehicle (V2V) communication technology, vehicle-to-remote server (V2C) communication, or vehicle-to-connected road infrastructure elements (V2I) communication, the ego vehicle is connected using on-board intelligent terminals to form a wireless communication network capable of implementing mutual communication. The ego vehicle can thus send or receive data relating to hazardous events present in the road infrastructure in order to improve road traffic efficiency and ensure user safety.

[0005] The conditions for triggering communication protocols between the vehicle and various targets or sources of the communication network may be governed by specific rules and standards, for example defined by the C2C Communication Consortium. These include, in particular, the detection of braking or deceleration when approaching a hazardous event such as a traffic jam.

[0006] Within the framework of the new EuroNCAP protocol, it has been observed that the execution of triggering conditions can lead to false detection of events concerning traffic jams, particularly a traffic jam tail, when The vehicle is located near other traffic-related events, such as roundabouts, traffic lights, stop signs, or yield signs. Indeed, the various sensors installed in the vehicle are not capable of reliably detecting vehicles positioned one behind the other to count them accurately. Therefore, they cannot distinguish between vehicles positioned one behind the other due to a traffic slowdown or a temporary stop caused by a road infrastructure element and vehicles actually in a traffic jam. This results in the generation of false positive alerts to other road users, indicating traffic jams that do not exist.

[0007] The present invention falls within this context and aims to propose a filtering process to optimize the detection of events such as traffic jams in order to ensure the safety of users in the road infrastructure.

[0008] The invention relates to a method of filtering data by an ego vehicle in a dangerous event situation such as an approaching traffic jam, the method comprising: - the detection of a dangerous event likely to be a traffic jam, in particular a traffic jam tail, and the acquisition of data relating to said event including at least its position; - the preparation by a processing unit of a communication, including the acquired data, to at least one target selected from a remote server, a connected secondary vehicle, distinct from the ego vehicle, and / or a connected infrastructure element; - verification of the validity of the detected hazardous event in order to check whether said hazardous event is of the traffic jam type or not, via a vehicle location module (ego) within the road infrastructure, including a location means and / or an image capture means; and - the transmission, by a communication module, of the prepared communication to at least one target when it is detected that the detected hazardous event is valid and is a traffic jam or the cancellation of such transmission when the hazardous event is invalid and is not a traffic jam.

[0009] In particular, the verification of the validity of the detected dangerous event includes the comparison of a position of the vehicle ego with a position of at least one element of the road infrastructure, the dangerous event being invalid when a distance separating the position of the dangerous event from the position of at least one element of the road infrastructure is less than or equal to a predefined threshold.

[0010] According to an alternative or additional embodiment, the verification of the validity of the detected hazardous event includes determining a distance separating the vehicle ego of the hazardous event, the determination of a distance separating the vehicle ego from at least one infrastructure element, the determination of a gap between said distances, and the comparison of the calculated gap with a predefined gap threshold, the hazardous event being invalid when the calculated gap is less than or equal to the predefined gap threshold.

[0011] Optionally, the verification of the validity of the detected hazardous event includes comparing the position of the detected hazardous event with a position of at least one element of the road infrastructure, the hazardous event being invalid when a distance separating the position of the hazardous event from at least one element of the road infrastructure is less than or equal to a predefined threshold.

[0012] In particular, the verification of the validity of the dangerous event is carried out according to a preference of the driver.

[0013] Optionally, the verification of the validity of the dangerous event is performed only when the ego vehicle is traveling at a longitudinal speed greater than or equal to a minimum threshold speed prior to or simultaneously with the detection of the dangerous event.

[0014] In particular: - Hazardous event detection includes the reception, by a remote server, a connected secondary vehicle and / or an infrastructure element, of data relating to the hazardous event; and / or - The verification of the validity of the hazardous event includes receiving information relating to the position of a connected infrastructure element.

[0015] Optionally, the filtering process further includes the emission of an audible, visual and / or haptic alert message to a driver of the ego vehicle communicated via an alert module informing said driver of the validity of the dangerous event.

[0016] The invention also relates to a data filtering system for a vehicle, the system comprising hardware and / or software elements implementing the method according to the invention, the hardware elements comprising at least one data processing unit, a vehicle localization module in the road infrastructure and a communication module.

[0017] The invention further extends to a motor vehicle equipped with a filtration system according to the invention.

[0018] The invention can also be extended to a computer program product comprising program code instructions recorded on a computer-readable medium to implement the steps of the process according to the invention when said program is running on a computer. In other words, the invention can extend to a computer program product downloadable from a communication network and / or recorded on a data medium readable by a computer and / or executable by a computer comprising instructions which, when the program is executed by the computer, lead the computer to implement the process according to the invention.

[0019] The present invention further relates to a computer-readable data recording medium on which is recorded a computer program comprising program code instructions for implementing the configuration method according to the invention, or to a computer-readable recording medium comprising instructions which, when executed by a computer, lead the computer to implement the method as described above.

[0020] Finally, the invention can be extended to a signal from a data carrier, carrying the computer program product according to the invention.

[0021] Other details, features and advantages will become clearer upon reading the detailed description given below, by way of example and not limitation, in relation to the various embodiments illustrated in the following figures:

[0022] [Fig.1] Fig.1 is a schematic view of an embodiment of a vehicle equipped with a data filtering system according to the invention.

[0023] [Fig.2] Fig.2 is a general flowchart of an example of the execution of a data filtering method according to the invention.

[0024] [Fig.3] Fig.3 is a schematic representation of the movement of a vehicle ego in the road infrastructure during a detection of a dangerous event such as a valid traffic jam.

[0025] [Fig.4] Fig.4 is a schematic representation of the movement of a vehicle ego in the road infrastructure during the detection of a dangerous event such as an invalid traffic jam.

[0026] Figure 1 schematically illustrates an embodiment of a vehicle 1 equipped with a data filtering system 2 in a hazardous event situation such as a traffic jam. A "hazardous event" is understood to be an event likely to present risks to the driver within the road infrastructure, particularly an event that is imminent or approaching vehicle 1.

[0027] Optionally, the vehicle 1 also includes a driver assistance system 3. The filtering system 2 according to the invention is then included in said driver assistance system 3 or configured to exchange data with said driver assistance system 3.

[0028] In the description below, a distinction will be made between an ego vehicle 1, capable of implementing a filtering process 100 according to the invention, and a secondary vehicle 10 present in the road infrastructure, connected and capable of receiving and / or transmitting data. The terms "ego" and "secondary" are used here to distinguish vehicles present in the road infrastructure.

[0029] The filtering system 2 comprises hardware and / or software elements capable of implementing the method according to the invention. The hardware elements include at least one data processing unit 4, a communication module 5, and a vehicle localization module 6 for the ego 1 within the road infrastructure.

[0030] Optionally, the filtering system 2 further includes all or part of the following hardware and / or software elements: - a driver alert module 7; and / or - a measurement module 8.

[0031] The processing unit 4 comprises one or more memory elements and a computer with hardware and software resources, including at least one processor or microprocessor cooperating with the memory element(s). The computer is capable of executing instructions for the implementation of a computer program and of receiving data from various equipment fitted to the vehicle ego 1.

[0032] The communication module 5 is configured to be able to transmit a data stream to at least one target and receive a data stream from at least one defined source by means of a low-frequency or high-frequency wireless link. This could, for example, be a wireless link based on cellular or Wi-Fi technologies. The sources and targets are selected from among a connected device, a remote server, a connected secondary vehicle 10, and / or a connected infrastructure element. Here, "infrastructure element" means a connected element present in the road infrastructure, such as connected traffic lights or connected information display panels.

[0033] In particular, said data can be sent to a remote communication means, equipped at the level of an infrastructure element, with at least one secondary vehicle 10 and / or at the level of a remote server capable of disseminating said data to a plurality of secondary vehicles 10 and / or infrastructure elements. The same principle applies to the reception of data. Thus, when a hazardous event EDx is detected by the vehicle ego 1, it can advantageously be communicated to one or more secondary vehicles 10 present in the road infrastructure. In particular, the secondary vehicle 10 in question is / are in close proximity to the vehicle ego 1 and said event.For example, the 10 targeted secondary vehicles are located at a distance dependent on the average traffic speed on the road infrastructure, so as to allow the targeted secondary vehicles to adapt their behavior, this distance therefore depends on the average speed on the infrastructure, the speed of the . primary vehicle, and a maximum deceleration value for secondary vehicles to enable them to reduce their speed upstream of the hazardous event.

[0034] The location module 6 enables the location of the vehicle 1 within the road infrastructure. It integrates, for example, a location means 61 comprising an approximate location system for the vehicle 1 and / or a high-definition map of the road infrastructure. In particular, the approximate location of the vehicle 1 may be provided by a GPS-type system, the acronym for "Global Positioning System". Alternatively or in addition, the location means 61 may be a location system embedded in the vehicle ego 1 that continuously integrates the movements of said vehicle.

[0035] Additionally or alternatively, the localization module 6 includes an image capture means 62 capable of detecting information present in the external environment in order to locate the ego 1 vehicle within the road infrastructure, including information panels relating to approaching infrastructure elements likely to cause traffic slowdowns, such as a roundabout, a toll barrier, or other such elements mentioned above. For example, the image capture means 62 includes a radar, a lidar, a camera, and / or any other type of sensor suitable for detecting targets in the environment of the ego 1 vehicle.

[0036] The alert module 7 is capable of broadcasting a message and / or a signal to the driver in the form of an emission: - sound, for example by means of a loudspeaker, and / or - visual, for example by means of a screen-type display module, and / or - haptic, for example by means of an element capable of emitting vibrations included in the driver's seat or steering wheel.

[0037] Alternatively or in combination, such an alert may be disseminated via a Human-Machine Interface.

[0038] The measuring module 8 includes at least one sensor configured to measure internal data of the ego 1 vehicle. For example, the measuring module 8 is configured to measure a longitudinal speed of the ego 1 vehicle, a deceleration, the intensity of a braking or other.

[0039] An example of the execution of the data filtering process 100 by the ego 1 vehicle in a situation of an approaching dangerous event, in particular identified as being of the traffic jam type, is described below with reference to Figures 2 to 4. The filtering process 100 can also be considered as a method of operation of the filtering system 2 according to the invention or as a method of operation of a vehicle 1 equipped with said system.

[0040] Generally, the filtering method 100 according to the invention comprises, initially, the detection E01 of a dangerous event EDx, which may be a traffic jam, triggering communication to at least one connected target. Here, "traffic jam" is understood to mean at least one line of a plurality of secondary vehicles 10 arranged one behind the other while stationary, or moving at a speed significantly lower than the maximum authorized speed at a given moment, in particular a speed strictly below 20 km / h, within the road infrastructure. For example, said secondary vehicles 10 are distributed across several lines, each traveling in a single lane.In particular, the process includes the detection of a traffic jam tail, corresponding to a particular lane, specifically the one containing the most secondary vehicles 10 so that the last secondary vehicles 10 arriving in the traffic jam are the closest to the ego vehicle 1 approaching the dangerous event EDx. .

[0041] The detection E01 of a dangerous event EDx of the traffic jam type is initiated in particular by the fulfillment of at least one predefined triggering condition.

[0042] In a known, but not detailed, manner, the detection of a traffic jam, in particular of the tail of the traffic jam, is carried out by means of at least one of the following: - the detection of braking of the vehicle ego 1 by means of the measuring module 8, in particular the detection of a deceleration greater than or equal to a predefined deceleration threshold Sdx and / or the detection of a depressment of a brake pedal greater than a predefined depressment threshold Spx; - the detection, via the location module 6, in particular the image capture means 62, of at least one secondary vehicle 10, located on a portion of the road ahead relative to the ego 1 vehicle, which is stopped, has activated hazard lights and / or is braking; - the reception, by the ego 1 vehicle, of a communication alerting of a dangerous event approaching the type of traffic jam, said communication being issued by a source selected from a remote server, a connected secondary vehicle 10 and / or a connected infrastructure element.

[0043] For example, in a known and non-limiting manner, the CAR 2 CAR Communication Consortium (C2C-CC) defines triggering conditions, or "triggering event" in English, for the detection of a dangerous event such as a traffic jam EDx initiating the preparation, by the vehicle ego 1, of a vehicle-server, vehicle-infrastructure and / or inter-vehicle communication in order to transmit data relating to the dangerous event EDx detected at the level of the processing unit 4, as further explained below.

[0044] In particular, the filtering system 2 or the ego vehicle 1 is configured to detect a remote EDx event of the traffic jam type initiating the preparation of communication from the ego 1 vehicle with remote targets when the TRCO_0 triggering condition defined in the C2C-CC is executed. The TRCO_0 triggering condition defines the detection of a traffic jam when, in an initial situation, the ego 1 vehicle is traveling at an initial longitudinal speed greater than 80 km / h and undergoes an initial deceleration equal to or less than 0.1 m / s², and then, in reaction to a hazardous event of the EDx traffic jam type, specifically a traffic jam tail: - the driver of the ego 1 vehicle reduces the longitudinal speed of the ego 1 vehicle in order to reach a target longitudinal speed of 30 km / h or less; and - the time elapsed between the implementation of the initial longitudinal speed and the implementation of the target longitudinal speed is less than or equal to 10s; - a measured deceleration between the initial longitudinal velocity and the target longitudinal velocity is greater than 3.5 m / s2, in other words a negative acceleration less than -3.5 m / s2.

[0045] According to another example, the filtering system 2 or the vehicle 1 is configured to detect a traffic jam requiring communication from the ego 1 vehicle with remote targets when the triggering condition TRCO_6 defined in the C2C-CC is executed, corresponding to the detection, or recognition, via the measurement module 8 or the image capture means 62, of a situation in which the ego 1 vehicle is facing a traffic jam tail as described above.

[0046] When a traffic jam is detected, the method includes the acquisition E02 of data relating to said hazardous event EDx in anticipation of communicating said data. Regardless of the detection principle implemented, said data includes at least the position of the hazardous event likely to be a traffic jam, in particular the tail end of the traffic jam, within the road infrastructure. Such data is provided by the measurement module 8, the localization module 6, the image capture means 62 and / or one of the connected sources informing the vehicle ego 1 of the presence of the hazardous event EDx. For example, the image capture means 62 is capable of determining a distance separating the vehicle 1 from the hazardous event, and consequently the position of said event, by detecting road markings or estimating a visible distance in front of the vehicle ego 1.

[0047] The detection E01 of a hazardous event such as a traffic jam EDx is then followed by the preparation E03, by the processing unit 4, of a communication including the acquired data. This communication is intended for at least one target selected from among a remote server, a connected secondary vehicle 10 and / or a connected infrastructure element.

[0048] To prevent the transmission of erroneous data to said targets, the method according to the invention advantageously includes a verification step E04 of the validity of the detected hazardous event EDx. "Validity verification" means confirmation as to whether said hazardous event EDx is of the traffic jam type or not. Such verification is performed via the localization module 6, in particular via the vehicle localization means 61 within the road infrastructure and / or via the image capture means 62.

[0049] According to a preferred execution example, the verification step E04 of the validity of the detected hazardous event EDx includes comparing the position of the vehicle ego 1 at time t of the detection E01 of the hazardous event and / or the position of the vehicle ego 1 subsequently after such detection, as it approaches said hazardous event EDx, with a position of at least one element of road infrastructure Ix.

[0050] The following description is made with reference to a single road infrastructure element Ix, but it is understood that the method according to the invention applies mutatis mutandis to a plurality of road infrastructure elements Ix.

[0051] Optionally, the road infrastructure element Ix under consideration is located within a predefined perimeter surrounding the vehicle ego 1, for example, a perimeter of approximately 500m or 400m. Alternatively, the road infrastructure element Ix under consideration is located in front of the vehicle ego 1, for example, on a future section of a route previously entered by the driver in the location means 61. Optionally, when a plurality of road infrastructure elements Ix are detected in the vicinity of the vehicle ego 1 and / or the hazardous event, the verification step E04 of the validity of the hazardous event EDx is executed with respect to the road infrastructure element Ix that is closest to the vehicle ego 1 and / or the hazardous event EDx.

[0052] The method then comprises, in the first stage, a substep of determining the position E041 of the vehicle ego 1 on the one hand, and of at least one element of road infrastructure Ix on the other. The location of the position of the vehicle ego 1 is defined in particular by means of the location module 6, in real time or at regular time intervals when a dangerous event EDx is detected.

[0053] The position of at least one infrastructure element Ix is preferably determined by means of the locating means 61, in particular by the mapping tools it comprises, in order to identify one or more road infrastructure elements Ix and their position. Alternatively or additionally, the image capture means 62 is capable of defining the position of one or more road infrastructure elements Ix, for example by means of recognition of Traffic sign recognition, or "traffic sign recognition" in English, or detection of conventional road infrastructure features, such as a pedestrian crossing near a road infrastructure element (Ix) like traffic lights, roundabouts, stop signs, or yield signs. Alternatively, the position of at least one road infrastructure element (Ix) is transmitted to the ego 1 vehicle via the communication module (5). For example, such a position is transmitted directly by the connected road infrastructure element (Ix).

[0054] Once the position of the road infrastructure element Ix and the position of the ego 1 vehicle have been determined, the verification step E04 includes a comparison step E042, in particular of the position of the ego 1 vehicle with the position of at least one infrastructure element.

[0055] The detected hazardous event EDx is determined to be invalid, that is, the initially detected traffic jam-type hazardous event EDx is a false positive, erroneous, when a distance D_int separating the position of vehicle ego 1 from the position of at least one road infrastructure element Ix is less than or equal to a first predefined distance threshold Sdl. Conversely, the detected hazardous event EDx is considered valid, that is, correctly identified, when the distance D_int separating the position of vehicle ego 1 from the position of at least one road infrastructure element Ix is strictly greater than the first distance threshold Sdl.

[0056] For example, said first distance threshold Sdl is on the order of 200 m, or even 150 m or 100 m. The first distance threshold Sdl is defined by the manufacturer. Alternatively, the first distance threshold Sdl is defined according to a driver's preference. Optionally, the first distance threshold Sdl can vary according to the geographical location of vehicle 1, for example, depending on whether vehicle ego 1 is traveling in an urban or suburban area. Using the position of vehicle ego 1 advantageously allows the use of reliable position data and eliminates the possibility that a large number of secondary vehicles 10, representative of a traffic jam, are arranged one after the other.

[0057] The method then includes the conditional transmission E05 of the prepared data relating to the hazardous event EDx. The transmission E05 of said prepared communication data is carried out by the communication module 5 to at least one of the targets listed previously when it is detected that the detected hazardous event EDx is valid. Conversely, when the initially detected hazardous event EDx is invalid, the method performs the cancellation E06 of such a transmission in order to avoid transmitting erroneous information to the targets present in the road infrastructure.

[0058] Alternatively or additionally, the E04 verification of the validity of the detected hazardous event EDx directly includes the determination E041' of the distance separating the ego 1 vehicle from the hazardous event EDx, in particular the part of the hazardous event EDx closest to the ego 1 vehicle, and the distance separating the ego 1 vehicle from at least one infrastructure element Ix. Such distances can be determined via the location module 6, in particular via the location means 61 or via the image capture means 62, as described above, in particular to determine a distance via the detection of markings or road signs.

[0059] The preceding description then applies mutatis mutandis. Once the distances are determined, a gap between them is calculated, and then the verification step E04 includes a comparison step E042' of the gap thus calculated with a predefined gap threshold Sdl'. The detected hazardous event EDx is determined to be invalid when the calculated gap is less than or equal to the predefined distance gap threshold Sdl'. Conversely, the detected hazardous event EDx is considered valid, that is, correctly identified, when said gap is strictly greater than the gap threshold Sdl'. For example, said gap threshold Sdl' is on the order of 200 m, or even 150 m or 100 m.

[0060] The verification step thus makes it possible to assess the proximity of the vehicle ego 1, and by extension of secondary vehicles located at the hazardous event EDx, to at least one element of the road infrastructure Ix or several elements of the road infrastructure Ix in order to rule out the detection of false positives of hazardous events such as traffic jams. It thus makes it possible to detect a road infrastructure element Ix likely to cause a stop or slowdown of traffic, such as a roundabout, a stop sign, a traffic light, or something similar, which could be mistaken for a traffic jam.

[0061] Alternatively or additionally, the verification step E04 of the validity of the detected hazardous event EDx includes comparing the position of the previously detected hazardous event EDx with the position of at least one element of the infrastructure. The preceding description then applies mutatis mutandis, using the position of the detected hazardous event EDx, for example, the position of the tail end of the traffic jam, instead of the position of vehicle ego 1. A second distance threshold Sd2, strictly lower than the first distance threshold Sdl, is then applied.

[0062] Optionally, various E04 verification methods for the validity of the hazardous event EDx are executed from among those mentioned above. results of said verification having the function of confirming or validating a first validation method.

[0063] Optionally, the E04 check of the validity of the hazardous event EDx is performed only when the vehicle ego 1 is traveling at a longitudinal speed greater than or equal to a minimum threshold speed Vs prior to or simultaneously with the detection of the hazardous event. For example, the minimum speed threshold is greater than 50 km / h, for example, in the order of 80 km / h.

[0064] Optionally, the method further includes sending an audible, visual, and / or haptic alert message to the driver of the ego 1 vehicle when the remote event is validated, i.e., when it is verified and confirmed that the ego 1 vehicle is approaching a traffic jam. As described above, such an alert message is communicated via the alert module 7.

[0065] In particular, the warning message is issued when the vehicle ego 1 is located, within the road infrastructure, at a distance less than or equal to a warning threshold Sa corresponding to a defined distance to be traveled before reaching the position of the hazardous event EDx. For example, such a warning threshold Sa is strictly greater than the first distance threshold Sdl. For example, the warning threshold Sa is set at 1000 m before reaching the position of the hazardous event EDx.

[0066] The processing unit 4 then performs a comparison of the remaining distance relative to the previously detected position of the hazardous event EDx, in particular the tail end of the traffic jam, with the distance of the alert threshold Sa and, when the remaining distance is less than or equal to the alert threshold Sa, it transmits data and / or a message to the warning module 7, which then displays it in the passenger compartment. A similar principle can be extended to the time remaining for the vehicle ego 1 before reaching the hazardous event EDx and to an alert threshold Sa set according to the remaining time before reaching the hazardous event EDx.

[0067] Optionally, the warning message can be updated at regular time and / or distance intervals to inform the driver of the remaining time and / or distance before reaching the hazardous event EDx.

[0068] Thus, when the ego 1 vehicle is traveling on the road infrastructure, the driver may perceive secondary vehicles 10 that are stopped or slowing down, which he identifies as a traffic jam or which may be identified by the driver assistance system 3 as a traffic jam, rightly or wrongly depending on the road context. The driver then tends to brake, which may trigger an automated detection E01 of a dangerous event EDx of the "traffic jam" type by the filtering system 2 and / or the driver assistance system 3, depending on the triggering conditions defined for such detection. The execution These conditions also entail the preparation E03 of a communication intended for at least one connected target, including data relating to the hazardous event EDx. Consequently, if the detected hazardous event EDx turns out to be a simple slowdown or temporary stoppage of traffic due to a road infrastructure element, an erroneous communication reporting a traffic jam is transmitted to the connected secondary vehicles 10 of the road infrastructure by the ego vehicle, which can affect user safety. To prevent the transmission of erroneous information, the ego vehicle 1 according to the invention performs the verification step E04 of the validity of the hazardous event EDx to check whether it is a traffic jam situation or not. The transmission E05 of the prepared communication relating to the hazardous event is then conditional upon the validity of the previously performed detection.

[0069] The invention thus proposes a method and a system that advantageously optimizes the communication protocols of the ego vehicle with connected targets by ensuring that data relating to a hazardous event, particularly a traffic jam, is verified and valid before being transmitted. The invention therefore makes it possible to increase the safety of the various vehicles circulating on the road infrastructure by ensuring the reliability of the communicated data, and this at a lower cost, by using components already installed in the vehicle.

[0070] The present invention cannot, however, be limited to the means and configurations described and illustrated herein and it also extends to any equivalent means or configuration and to any technically operative combination of such means insofar as they ultimately fulfill the functionalities described and illustrated in this document.

Claims

Demands

1. Method (100) of filtering data by an ego vehicle (1) in a hazardous event (EDx) situation of the type of approaching traffic jam, the method (100) comprising: - the detection (E01) of a hazardous event (EDx) likely to be a traffic jam, in particular a traffic jam tail, and the acquisition (E02) of data relating to said event including at least its position; - the preparation (E03) by a processing unit (4) of a communication, including the acquired data, to at least one target selected from a remote server, a connected secondary vehicle (10), distinct from the ego vehicle (1), and / or a connected infrastructure element;- the verification (E04) of the validity of the detected hazardous event (EDx) in order to check whether said hazardous event is of the traffic jam type or not by means of a location module (6) of the vehicle ego (1) in the road infrastructure comprising a location means (61) and / or an image capture means (62); and - the transmission (E05), by a communication module (5), of the prepared communication to at least one target when it is detected that the detected hazardous event (EDx) is valid and is a traffic jam or the cancellation (E06) of such transmission when the hazardous event (EDx) is invalid and is not a traffic jam.

2. A filtering method (100) according to the preceding claim, wherein the verification (E04) of the validity of the detected hazardous event includes comparing a position of the vehicle ego (1) with a position of at least one element of the road infrastructure (Ix), the hazardous event (EDx) being invalid when a distance separating the position of the hazardous event (EDx) from the position of at least one element of the road infrastructure (Ix) is less than or equal to a predefined threshold (Sdl).

3. A filtering method (100) according to any one of the preceding claims, wherein the verification (E04) of the validity of the detected hazardous event comprises determining a distance separating the vehicle ego (1) from the hazardous event (EDx), the determination of a distance separating the vehicle ego (1) from at least one element of the road infrastructure (Ix), determination of a gap between said distances and comparison of the calculated gap with a predefined gap threshold (Sdl'), the dangerous event being invalid when the calculated gap is less than or equal to the predefined gap threshold (Sdl').

4. A method (100) of filtering according to any one of the preceding claims, wherein the verification (E04) of the validity of the detected hazardous event includes comparing the position of the detected hazardous event (EDx) with a position of at least one element of the road infrastructure, the hazardous event being invalid when a distance separating the position of the hazardous event (EDx) from at least one element of the road infrastructure is less than or equal to a predefined threshold (Sd2).

5. A filtering method (100) according to any one of the preceding claims, wherein the verification (E04) of the validity of the hazardous event is performed according to a driver preference.

6. A method (100) of configuration according to any one of the preceding claims, wherein the verification (E04) of the validity of the hazardous event is performed only when the vehicle ego (1) is traveling at a longitudinal speed greater than or equal to a minimum threshold speed (Vs) prior to or simultaneously with the detection of the hazardous event.

7. A method (100) of filtering according to any one of the preceding claims, wherein: - the detection of the hazardous event includes the reception, by a remote server, a connected secondary vehicle (10) and / or an infrastructure element, of data relating to the hazardous event (EDx); and / or - the verification (E04) of the validity of the hazardous event includes the reception of information relating to a position of a connected infrastructure element.

8. A method (100) of filtering according to any one of the preceding claims, further comprising the emission of an audible, visual and / or haptic warning message to a driver of the ego vehicle (1) communicated via an alert module (7) informing said driver of the validity of the dangerous event.

9. 16 Data filtering system (2) for a vehicle, the system comprising hardware and / or software elements implementing the method (100) according to any one of the preceding claims, the hardware elements comprising at least one data processing unit (4), a vehicle location module (6) in the road infrastructure and a communication module (5).

10. Motor vehicle (1) equipped with a filtration system (2) according to the preceding claim.

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