EP3977758A1

EP3977758A1 - Method for generating a knowledge message from a first road user, and method and device for assisting a second road user

Info

Publication number: EP3977758A1
Application number: EP20724523.4A
Authority: EP
Inventors: Cédric Seureau; Dominique Jezequel
Original assignee: Orange SA
Current assignee: Orange SA
Priority date: 2019-05-27
Filing date: 2020-05-14
Publication date: 2022-04-06
Also published as: WO2020239455A1; US20220248175A1; FR3096861A1

Abstract

The invention relates to the protection of vulnerable road users. Said vulnerable road users are in particular pedestrians and users of non-motor vehicles such as bicycles, scooters etc. as well as light electric vehicles. The invention relates to a method for generating knowledge messages from a first road user to be sent to at least one device for assisting a second road user, the generation method comprising a step of integrating into the knowledge message at least one calculated datum regarding the status of the first road user. Thus, in addition to the current position of the first road user measured by the smartphone (GPS measurement), the knowledge message includes other items of status data which are based on a calculation. This provides more detailed knowledge regarding the behaviour of the first road user and thus reduces the risk of collisions with a second road user.

Description

DESCRIPTION

PROCESS FOR GENERATING A KNOWLEDGE MESSAGE OF A FIRST ROAD USER, AND

PROCESS AND DEVICE FOR ASSISTANCE OF A SECOND ROAD USER

Technical area

The invention relates to the protection of vulnerable road users since they do not have external status indicators such as brake lights, direction change lights, in particular turn signals, etc. These vulnerable road users are notably non-motorized users: pedestrians, rollerbladers, skateboards, bicycles, scooters ... but also light electric vehicles such as electrically assisted bicycles, electric scooters, etc., more generally known as "pedestrians" or "very light vehicles" .

The invention proposes a method for generating knowledge messages for a first road user, a method for protecting a first use of the road, a method for assisting a second road user able to receive knowledge messages of a first road user, a communication device of a first road user, an assistance device of a second road user and a communication device of a second road user the road.

State of the art

According to statistics, more than 3000 people die every day as a result of dangerous driving and a quarter of these people are said to be vulnerable road users. The main reason for accidents is the inability of road users to detect and perceive future dangers before the time necessary for the reaction taken to prevent accidents: they happen at night half of the time!

In order to reduce accidents with pedestrians, much attention has been given to pedestrian detection and the prediction of the possibility of a collision using sensors and vision processing techniques. However, such techniques based on detectors have performance limits in the event of poor visibility conditions (night, bad weather, etc.) or if the pedestrian is not sufficiently close (within 10 meters) or not in the vicinity. line of sight (NLOS for "non-line-of-sight").

For this, it is necessary to study and develop different techniques to further reduce these accidents. One of these techniques is the use of communication technology to provide a broad view of road users in conditions where the vulnerable road user is not in line of sight. Even if driving safety is one of the important subjects of research in telecommunications, most of the work focuses on collision avoidance between motorized vehicles, more generally called vehicles, in particular cars, buses, coaches, etc. trams, trucks, etc. focusing on V2V communications, i.e. vehicle-to-vehicle communications, and V2I communications, i.e. vehicle-to-infrastructure communications, such as traffic lights, signs speed limits, tolls, etc.

However, the 3GPP consortium offers a "Cellular V2X" standard which also describes V2P communications, that is, vehicle-to-pedestrian communications. These communications make it possible to inform vehicles (motor vehicles) of the presence of pedestrians and / or pedestrians (more generally the user of light vehicles) by means of their smartphone of the existence of arriving vehicles.

In particular, the ETSI EN 302637-2 standard defines cooperative knowledge messages, CAM for “Cooperative Awareness Messages” in English, making it possible to maintain knowledge of each other for each road user. The message including in particular status information including in particular the date, position, state of movement, vehicle systems activated, etc. For a motorized vehicle, the cooperative knowledge message includes the dated GPS position (retrieved from the navigation device), the movement state includes in particular the speed (provided by the speedometer) but also the direction (provided by the GPS and / or the change of direction indicator), the systems activated (in particular the brakes).

While the development of cooperative knowledge messages for motor vehicles provides detailed knowledge of the vehicle, this is not the case for pedestrians. In general, the only information transmitted is the position provided by the pedestrian's smartphone. Thus, vulnerable road users are still barely visible to motor vehicles. Anticipating their actions to adapt the driving of a motor vehicle is difficult if not impossible with information on braking or change of direction.

Without this information, the risk of accidents is real for light vehicles (bicycles, scooters, light electric vehicles, etc.) among themselves but also with all other vehicles and pedestrians. In addition, this lack of information can lead to dangerous actions (overtaking, change of direction ...) of a vehicle piloted by a human or of an autonomous vehicle (in particular piloted by an Artificial Intelligence) due to a poor appreciation of the behavior of a "pedestrian" in his immediate intoxication (for example, the preceding immediately). Disclosure of the invention

One of the aims of the present invention is to provide improvements over the state of the art.

An object of the invention is a method of generating knowledge messages of a first road user intended for at least one assistance device of a second road user, the generation method comprising an integration in said knowledge message of at least one calculated datum of state of the first user of the road.

Thus in addition to the current position of the first road user measured by a smartphone or another on-board communication device (GPS measurement), the knowledge message includes other status data such as braking, change of direction, current trip ... which are established following a calculation. This allows a finer understanding of the behavior of the first road user and thus reduces the risk of collisions with a second road user. The generation of knowledge messages of a first road user makes it possible to provide knowledge relating to this first road user to second road users.

Advantageously, the method for generating knowledge messages comprises a calculation of at least one data item of the state of the first user of the road.

Thus, this reduces the time taken to take into account the knowledge included in the message and therefore increases the probability of collision avoidance due to the fact that there is no delay in transmission of the results of a remote calculation, in particular in a other device of a communication network (cloud) to the device of the first user of the road implementing the generation of knowledge message.

Advantageously, the calculated data of the state of the first road user results from a calculation of at least one of the following types:

- a calculation based on at least one measured data item of the current state of the first road user,

Thus, the calculated status data takes into account the current status of the first user: geographical position, but also position on the roadway (standing, lying down), movement (constant speed, strong deceleration, strong acceleration, etc.) or command. explicitly activated by the user. For example, the accelerometers of the smartphone or of a connected object (watch) worn by the first user of the road measure that the first user is lying on the ground. The calculated state data will then be "accident".

- a navigation calculation making it possible to reproduce information relating to a journey intended for the first road user, Thus, the navigation information is not only supplied to the first road user requesting a journey but also serves second road users present around this first road user to take account of his journey in their driving. Either the message directly comprises the calculated path provided to the first user, or the message comprises more precise state data such as the position calculated for an instant T taking into account not only the V2P transmission delay but also the reaction delay to avoid a collision, a possible change of direction (depending on the calculated route), etc.

- a prediction calculation based on current state data of the first road user in a trip.

Thus, a predicted journey of a first road user is not only used for the communication terminal of the first road user to inform him about businesses (advertisements, actions to be carried out: shopping), vehicles (protection), friends ... present on his journey but also to second road users present around this first road user to take his journey into account in their driving. Either the message directly comprises the path predicted to the first user, or the message comprises more precise state data such as the position predicted for an instant T taking into account not only the V2P transmission delay but also the reaction delay to avoid a collision, a possible change of direction (depending on the predicted route), etc.

Another object of the invention is a method of protecting a first road user comprising

a generation of a knowledge message of a first user of the road to at least one assistance device of a second user of the road integrating in said knowledge message at least one calculated datum d 'condition of the first road user, and

- transmission of the generated knowledge message to at least one assistance device for a second road user.

Advantageously, the program is a program of at least one of the following types:

- a direct transmission to the second road user assistance devices located in the transmission cell of the first road use,

Thus, the transmission delay being reduced, the time allowing the second road user to react is longer, making it possible to reduce the risk of collisions.

- a broadcast via a mobile communication network. Thus, the transmission is safer and the messages are processed by more efficient computers (speed of calculations, load, etc.), the resulting data is more precise and more reliable.

An object of the invention is also a method of assisting a second road user capable of receiving knowledge messages from a first road user, the assistance method comprising a processing of received knowledge messages. of a first road user as a function of at least one state datum of the second road user.

Advantageously, the processing includes a modification of a driving assistance datum as a function of the knowledge message received and at least one state datum of the second road user.

Advantageously, the assistance method comprises, if the result of the processing determines a risk, a notification of an alert knowledge message intended for the second user of the road.

Advantageously, the processing comprises a calculation of an updated route as a function of the knowledge message received and at least one state data item of the second user of the route.

Advantageously, the processing comprises a calculation of a command from the second user of the road as a function of the knowledge message received and at least one state data item of the second user of the road.

Advantageously, according to an implementation of the invention, the various steps of the method according to the invention are implemented by software or computer program, this software comprising software instructions intended to be executed by a data processor of a device forming part of a communication device and being designed to control the execution of the various steps of this method.

The invention therefore also relates to a program comprising program code instructions for executing the steps of the method for generating knowledge messages and / or a method for protecting a first use of the road and / or the method of assistance when said program is executed by a processor.

This program can use any programming language and be in the form of source code, object code or intermediate code between source code and object code such as in a partially compiled form or in any other desirable form. An object of the invention is also a communication device of a first road user comprising:

- a transmitter allowing communication with at least one communication device of a second road user and

a generator of knowledge messages from a first road user to at least one assistance device for a second road user, the generator integrating into said knowledge message at least one calculated datum status of the first road user.

An object of the invention is also a device for assisting the driving of a second road user capable of receiving knowledge messages from a first road user, the assistance device comprising a data processor. processing of the knowledge messages received from a first user of the road as a function of at least one state datum of the second user of the road.

Advantageously, the driving assistance device is implemented in one of the following devices:

- a driving assistance device,

- a navigation device,

- a vehicle control device,

- an autonomous driving device.

An object of the invention is also a communication device for a second road user comprising:

- a receiver allowing communication with at least one communication device of a first road user and

an assistant capable of receiving knowledge messages from a first user of the road, the assistant processing the knowledge messages received from a first user of the road as a function of at least one state datum of the second user of the road.

Brief description of the drawings

The characteristics and advantages of the invention will emerge more clearly on reading the description, given by way of example, and the figures relating thereto which represent:

[Fig 1] Figure 1, a simplified diagram of a method for generating knowledge messages of a first road user according to the invention,

[Fig 2] Figure 2, a simplified diagram of the assistance of a second road user according to the invention,

[Fig 3] Figure 3, a simplified diagram of a communication architecture comprising a first and a second user of the road, according to the invention, [Fig 4a] Figure 4a, a simplified diagram of a first use case of the invention in which a message of knowledge of an indication of change of direction of the first user of the road is transmitted to second users of the road. road,

[Fig 4b] Figure 4b, a simplified diagram of a second use case of the invention in which a message of knowledge of an indication of change of direction of the first user of the road is transmitted to a second user of the road. road,

[Fig 5] Figure 5, a simplified diagram of a third use case of the invention in which a message of knowledge of a braking indication from the first road user is transmitted to the second road users,

[Fig 6] Figure 6, a simplified diagram of a fourth use case of the invention in which a message of knowledge of a fault or accident indication of the first road user is transmitted to the second road users. the road.

Description of embodiments

FIG. 1 illustrates a simplified diagram of a method for generating knowledge messages of a first road user according to the invention.

The method of generating knowledge messages MSS_GN from a first user of the URT route to at least one assistance device for a second user of the route DA_UR ₂ comprises an integration MSSGJNT in said knowledge message cam d 'at least one calculated state datum of the first user of the route of _c ^ur1 .

In particular, the method for generating knowledge messages MSSG_GN comprises a calculation of at least one state datum of the first user of the route DE_CLC. Alternatively, the calculation of at least one state datum of the first user of the DE_CLC route is carried out by a third-party method possibly at the request of the method for generating knowledge messages MSSG_GN possibly comprising a measured datum of the current state of the first user of the route of _m ^ur1 , of _m ^ur1 (t) prior to MSSGJNT integration.

In particular, given the calculated state of the first user of the road _c ^ur1 result of a calculation of at least one of the following:

- a calculation based on at least one measured datum of the current state of the first user of the road of _m ^ur1 , of _m ^ur1 (t),

- an NV_CLC navigation calculation making it possible to reproduce information relating to a journey intended for the first user of the road,

- a PRD_CLC prediction calculation as a function of current state data of the first user of the route a trip. Calculated status data of the _c ^ur1 is in particular a state from the following: normal, stopped moving, braking, change direction to the right, deflecting to the left, breakdown, accident ... calculated respectively given function measured current state such as travel speed, data measured by accelerometers to determine sudden deceleration, change of direction, connected sensors of the bike (e.g. on the derailleur of the bike), change of position of the first road user and / or his user (vertical or horizontal position) ...

The PRD_CLC prediction calculation as a function of current state data makes it possible to predict a journey of the first road user and / or actions of the first road user such as braking, change of direction, etc. In particular, the calculation PRD_CLC prediction is further dependent on historical state data.

In particular, the generation of knowledge messages MSSG_GN is performed as a function of state data measured either by CPT sensors, or during an MST measurement carried out prior to the generation of MSSG_GN messages.

A method of protecting a first user of the UR1_PP route comprises

a generation of a knowledge message MSSG_GN from a first road user to at least one assistance device for a second road user integrating into said knowledge message at least one calculated datum condition of the first road user, and

- an EM transmission of the generated knowledge message to at least one assistance device for a second road user.

In particular, the EM program is a program of at least one of the following types:

- a direct transmission to the assistance devices of the second user of the road DA_UR ₂ located in the transmission cell of the first use of the road,

- a broadcast via a mobile communication network.

In particular, an embodiment of the method for generating knowledge message MSSG_GN and / or of the method for protecting the first user of the UR1_PP route is a program comprising program code instructions for executing the steps of the generation method. knowledge messages of the first user of the road and / or of the method for protecting a first user of the road when said program is executed by a processor.

FIG. 2 illustrates a simplified diagram of assistance for a second road user according to the invention. The method for assisting a user of the second UR2_PA road is adapted to receive messages from knowledge of a first user of the cam drive _(c ^ur1). The assistance method UR2_PA comprises a CAM_TRT processing of knowledge messages received from a first user of the route as a function of at least one state datum of the second user of the route uG _m

In particular, the processing of CAM_TRT knowledge messages is performed as a function of state data measured either by CPT sensors or during an MST measurement performed prior to the processing of CAM_TRT messages.

In particular, the CAM_TRT processing includes a modification ASS_MDF of an assistance data c / a in driving as a function of the knowledge message received cam and at least one state data item of the second user of the route of _m ^ur2 . The modification ASS_MDF then provides a modified assistance data da ^* (for example, an indication of action and / or a route to follow).

In particular, the UR2_PA assistance method comprises, if the result of the processing determines a risk r (cam) ^ pb = [N], a notification ntf of an alert knowledge message intended for the second user of the road UR ₂ .

In particular, the CAM_TRT processing comprises a calculation of an updated route as a function of the received knowledge message cam and at least one state datum of the second user of the route of _m ^ur2 .

In particular, the CAM_TRT processing comprises a calculation of a CMD_CLC command of the second user of the route as a function of the knowledge message received and at least one state datum of the second user of the route. The CMD_CLC command calculation provides a command for at least one item of equipment from the second road user (brake, steering wheel, accelerator, etc.) cmcf ^r2 .

In particular, one embodiment of the assisting method is a program comprising program code instructions for performing the steps of the assisting method when said program is executed by a processor.

In particular, the assistance method UR2_PA comprises a reception REC of a knowledge message of a first use of the route cam (of _c ^ur1 ) prior to the processing of CAM_TRT messages.

In particular, the CAM_TRT message processing receives data for assistance in driving da resulting from an NV_CLC navigation calculation. In particular, the UR2_PA assistance method includes the NV_CLC navigation calculation. Optionally, the NV_CLC navigation calculation is performed on request from the CAM_TRT message processing.

In particular, following the processing of the CAM_TRT message, the UR2_PA assistance method comprises a TRG triggering of a command command from a device of the second user of the UR2 route.

In particular, the UR2_PA assistance method comprises a check whether the result of the treatment determines a risk r (cam) ^ pb ?. If this is the case [Y], the assistance method optionally comprises an ALT alert notifying the user of the second user of the UR2 route and / or a triggering TRG of a command cmd of a device of the second user from the UR2 road.

In particular, if this is not the case [N], the UR2_PA assistance method does not perform any additional step NS.

FIG. 3 illustrates a simplified diagram of a communication architecture comprising a first UR ¹ and a second user of the route UR ² , according to the invention.

The communication device 1 of a first user of the UR route ¹ comprises:

- a transmitter 10 making it possible to communicate with at least one communication device 2 of a second user of the UR route ² and

- A generator 11 of knowledge messages of a first user of the road to at least one assistance device 21 of a second user of the road, the generator 11 1 integrating in said knowledge message of at least one calculated data item of the state of the first user of the road.

In particular, the generator of knowledge messages 111 of a first user of the route UR _T to at least one assistance device of a second user of the route DA_UR ₂ comprises an integrator 1115 in said knowledge message cam of at least one calculated state datum of the first user of the route of _c ^ur1 .

In particular, the knowledge message generator 111 includes a computer for at least one state data item of the first user of the route 1114.

In particular, given the calculated state of the road of the first user of ^ur1 _c is provided by one of the following computers:

- a navigation computer making it possible to reproduce information relating to a journey intended for the first road user,

- a prediction computer based on current state data of the first road user a trip. In particular, the prediction computer further performs calculations as a function of a history of state data.

In particular, the knowledge message generator 1 1 1 uses state data measured either by sensors 12 or by a measuring device 12.

In particular, the communication device 1 of the first user of the road UR1 comprises a protection device 11 of the first user of the road. The protection device 1 1 comprises

- The generator 11 1 of knowledge message of the first user of the road to at least one assistance device of a second user of the road integrating in said knowledge message at least one calculated datum of condition of the first road user, and

- a sender 10 of the knowledge message generated for the at least one assistance device 21, 41 of a second road user.

In particular, the transmitter 10 is a transmitter of at least one of the following types:

- a direct transmitter intended for the assistance devices 21, 41 of the second user of the UR ₂ route located in the transmission cell of the first use of the UR1 route,

- a transmitter via a mobile communication network (3G, 4G, 5G, etc.).

The assistance device 21, 41 for driving a second road user is able to receive knowledge messages from a first road user. The assistance device 21, 41 includes a processor for processing knowledge messages received from a first road user as a function of at least one state datum from the second road user.

In particular, the driver assistance device is implemented in one of the following devices:

- a driving assistance device 4,

- a navigation device 4,

- a vehicle control device 5,

- an autonomous driving device 6.

In particular, the vehicle control device 5 comprises sensors 50 and a generator for controlling at least one piece of equipment 9i of the second user of the road UR2.

In particular, the autonomous driving device 6 receives modified assistance data da ^* and / or commands cmd. In particular, the autonomous driving device 6 comprises an adapter 68 able to take into account, in the driving command generation, modified assistance data and / or commands supplied by the assistance device 21, 41. The communication device 2 of a second user of the UR route ² comprises:

- a receiver 20 making it possible to communicate with at least one communication device 1 of a first user of the UR route ¹ and

an assistant 21, 41 capable of receiving knowledge messages from a first user of the road, the assistant 21, 41 processing the knowledge messages received from a first user of the road as a function of at least one datum status of the second road user.

The support device of a second user of the road 21, 41 is adapted to receive knowledge of messages of a first user of the cam drive _(c ^ur1). The assistance device 21, 41 comprises a processor for processing knowledge messages received from a first user of the road as a function of at least one state datum of the second user of the road uG _m

In particular, the knowledge message processing processor performs processing based on status data measured either by sensors 7j or by a measuring device 7j.

In particular, the processing processor comprises a modifier 21 1 of a c / a driving assistance datum as a function of the received knowledge message cam and at least one state datum of the second user of the road. _m ^ur2 . The modifier 21 1 then provides a modified assistance data da ^* (for example, an indication of action and / or a route to follow).

In particular, the assistance device 21, 41 includes a generator ntf notification of a message of knowledge to alert UR Route ₂ of the second user _ge _ne r _a n _t a notification if the result provided by the message processing processor determines a risk r (cam) ºpb = [N] ,.

In particular, the processing processor comprises a route computer updated as a function of the received knowledge message cam and at least one state datum of the second user of the route of _m ^ur2 .

In particular, the processing processor comprises a computer for a command 212 from the second user of the road as a function of the knowledge message received and at least one state datum of the second user of the road. The control computer 212 provides a control of at least one item of equipment for the second road user (brake, steering wheel, accelerator, etc.) cmtf ^r2 .

In particular, the message processing processor receives data for assistance with driving da from a navigation computer 46. Optionally, a reproducer 46 such as a screen and / or speakers reproduce the data from assistance provided by the navigation controller 46. In particular, the assistance device 21, 41 comprises the navigation 46. Optionally, the navigation computer 46 is triggered at the request of the message processing processor.

In particular, following the processing of the message, the assistance device 21, 41 comprises a trigger for a cmd command from an equipment item of the second user of the UR2 route.

In particular, the assistance device 21, 41 includes a checker if the result of the treatment determines a risk r (cam) ^ pb ?. If this is the case [Y], the assistance device optionally comprises an alert generator notifying the user of the second user of the UR2 route and / or a trigger for a cmd command from a device of the second UR2 road user.

In particular, if this is not the case [N], the assistance device 21, 41 does not perform any additional step NS.

In particular, the cam messages are exchanged between the first user of the UR1 route and the second user of the UR2 route via a 3 _L local communication network, such as a Bluetooth WiFi network, etc. Optionally, the knowledge messages cam are sent to a remote communication network 3 _n, such as the Internet.

Thus, very light vehicles can signal their presence, their change of direction, brake or encounter an anomaly without the surrounding vehicles being clearly informed. The purpose of the device is to inform surrounding vehicles (behind, to the sides and in front) of a projected trajectory, braking or an anomaly (eg fall) in order to avoid collisions. Surrounding vehicles may be in the immediate vicinity or behind another vehicle.

The communication of information from "very light" vehicles to other vehicles is done using a communication device, for example Cellular-V2X (LTE-V2X, 5G-V2X, etc.) or any other communication protocol (Wi -Fi, ITS-G5 ...) in pair-to-pair mode or cut off from the network.

Figures 4a and 4b illustrate two use cases of the invention in which a knowledge message of a change of direction indication from the first road user is transmitted to second road users.

Very light vehicle trajectories can be known through user-configured guidance software, user route prediction (through daily analysis) or other means such as direction change control. Surrounding vehicles are warned in different ways of the presence of these very light vehicles and their change of trajectory: vehicles piloted by a human driver can visualize this trajectory by any device (visual, sound, etc.). Autopilot vehicles, said to be autonomous, can take this risk into account and qualify it in their piloting software. If several "very light" vehicles are at the same level, the device makes it possible to differentiate their trajectories.

Figure 4a shows a simplified diagram of a first use case of the invention in which a knowledge message of a change of direction indication from the first road user is transmitted to second road users.

In the example of FIG. 4a, motorized vehicles are present on two traffic lanes: a UR _2c truck on the left lane, two UR _2a and UR ₂ cars on the right lane. In front of the left lane is a first so-called vulnerable road user: a UR _Ï bicycle. The bike will turn left at the traffic lights. This information is in particular determined either because the user of the bicycle has requested a navigation aid to a destination which has generated a navigation route, or because the smartphone of the user of the bicycle includes a route prediction application. The invention thus makes it possible to generate a message indicating a change of direction to the left of the first user of the road, the bicycle UR1. This message is sent and then notified ntfa, ntfb, ntfc to the second road users UR2a, UR2b, UR2c.

In particular, FIG. 4a shows on the right side the driving assistance screen for each of the second road users 47 _UR2c , 47 _UR2a 47 _UR2b . The screen shows in particular the message ntf_mssg, in this case the change of direction to the left of the first user of the UR1 route. Optionally, it also indicates the type of user of the nft_ty road, in this case a bicycle. In particular, it can also indicate the position ntf_pos of the first user of the road UR1 with respect to the second users of the road UR2a, UR2b, UR2c. In this case, the first road user is symbolized by his change of direction, the second road user receiving the message displaying the message is symbolized by the full square and the other second road users by empty squares.

In this first case of use, all the second road users engaged on the tracks in the same direction of travel are recipients of the knowledge message from the first road user.

FIG. 4b shows a simplified diagram of a second use case of the invention in which a knowledge message of an indication of change of direction from the first user of the road is transmitted to a second user of the road. In the example of FIG. 4b, motorized vehicles are present on two traffic lanes: two cars on the left lane, one UR ₂ car on the right lane. In front of the right lane is a first so-called vulnerable road user: a UR bicycle ^ The bicycle will turn left at the traffic lights. A message is sent and then notified ntf to the second user of the UR2 route.

In particular, FIG. 4a shows on the right side the driving assistance screen for the second user of road 47. The screen shows in particular the message, in this case the change of direction ntf_dir \ / ers the left of the road. first user of the UR1 route. Optionally, it also indicates the type of user of the nft_ty road, in this case a bicycle. In particular, it can also indicate the position ntf_pos of the first user of the road UR1 with respect to the other road users. In this case, the first road user is symbolized by his change of direction, the second road user receiving the message displaying the message is symbolized by the full square and the other road users by empty squares.

In this second use case, only the second road users sharing the same traffic lane are recipients of the knowledge message from the first road user.

FIG. 5 illustrates a simplified diagram of a third use case of the invention in which a message of knowledge of a braking indication from the first road user is transmitted to the second road users.

When very light vehicles brake, the following vehicles understand the braking situation following an analysis delay and vehicles that are not in immediate visibility very light vehicles do not understand the whole situation and cannot analyze the reason braking the vehicle immediately in front of them, which could cause inappropriate behavior.

Surrounding vehicles are warned in different ways of the presence of these very light vehicles and their braking: vehicles driven by a human driver can visualize this braking by any device (visual, sound, etc.). Autopilot vehicles, said to be autonomous, can take this risk into account and qualify it in their piloting software.

In the example of FIG. 5, motorized vehicles are present on two traffic lanes: two cars on the left lane, and a UR _2c bicycle, two UR _2a and UR ₂ cars on the right lane. In front of the right lane is a first so-called vulnerable road user: a UR _V bicycle. The bicycle brakes. This information is in particular determined either by means of sensors (for example accelerometer of the smartphone), or because the user of the bicycle has requested a navigation aid to a destination which has generated a navigation path, or because the smartphone of the bike user has a route prediction application. The invention thus makes it possible to generate a braking indication message for the first user of the road, the bicycle UR1. This message is sent and then notified ntfa, ntfb, ntfc to the second road users UR2a, UR2b, UR2c.

In particular, FIG. 5 shows on the right side the driving assistance screen for each of the second road users 47 _UR2c , 47 _UR2a, 47 _UR2b . The screen shows in particular the message ntf_mssg, in this case the braking of the first user of the UR1 road. In particular, it can also indicate the position ntf_pos of the first user of the road UR1 with respect to the second users of the road UR2a, UR2b, UR2c. In this case, the first road user is symbolized by his braking (red light), the second road user receiving the message displaying the message is symbolized by the full square and the other second road users by squares. empty.

FIG. 6 illustrates a simplified diagram of a fourth use case of the invention in which a message of knowledge of a fault or accident indication from the first road user is transmitted to the second road users.

When very light vehicles encounter an anomaly (chain derailment, fall, etc.), the following vehicles include the abnormal situation following an analysis delay and vehicles which are not in immediate visibility, very light vehicles do not understand the situation as a whole and cannot analyze the behavior of the vehicle immediately in front of them which may cause inappropriate behavior.

Surrounding vehicles are warned in different ways of the presence of these very light vehicles and their anomaly: vehicles driven by a human driver can visualize this braking by any device (visual, sound, etc.). Autopilot vehicles, said to be autonomous, can take this risk into account and qualify it in their piloting software.

In the example of FIG. 6, a motorized vehicle is present on the traffic lane: an UR car _2a and a vulnerable vehicle: an UR bicycle _2c before a right turn. After the bend, a first so-called vulnerable road user is present: an URT bicycle not visible to second road users. The bike has a breakdown or an accident. This information is determined in particular either because the user of the bicycle has requested assistance (call to an emergency number), or because connected equipment of the bicycle makes it possible to detect in particular a derailment or a smartphone sensor makes it possible to determine that the user is lying down (on the roadway). The invention thus makes it possible to generate a fault or accident indication message for the first user of the road, the UR1 bicycle. This message is sent and then notified ntfa, ntfc to the second users of the UR2a, UR2c road. In particular, FIG. 6 shows on the right side the driving assistance screen for each of the second road users 47 _UR2c , 47 _UR2a . The screen shows in particular the message ntf nssg, in this case the incident (accident, breakdown, etc.) of the first user of the UR1 route. In particular, it can also indicate the position ntf_pos of the first user of the road UR1 with respect to the second users of the road UR2a, UR2b, UR2c. In this case, the first road user is symbolized by an incident indicator, the second road user receiving the message displaying the message is symbolized by the full square and the other second road users by empty squares .

The invention consists in avoiding dangerous situations, through the communication of information, for example by badly anticipating that one or more very light vehicle (s):

- Go (will) turn left and therefore force the following vehicle to slow down;

- Will brake and therefore cause potentially emergency braking;

- Has / have fallen on the roadway after an intersection and therefore cause dangerous emergency braking.

The invention is also aimed at a support. The information medium can be any entity or device capable of storing the program. For example, the medium can comprise a storage means, such as a ROM, for example a CD ROM or a microelectronic circuit ROM or else a magnetic recording means, for example a floppy disk or a hard disk.

On the other hand, the information medium can be a transmissible medium such as an electrical or optical signal which can be conveyed via an electrical or optical cable, by radio or by other means. The program according to the invention can in particular be downloaded over a network, in particular of the Internet type.

Alternatively, the information medium can be an integrated circuit in which the program is incorporated, the circuit being adapted to execute or to be used in the execution of the method in question.

In another implementation, the invention is implemented by means of software and / or hardware components. From this perspective, the term module can correspond equally well to a software component or to a hardware component. A software component corresponds to one or more computer programs, one or more sub-programs of a program, or more generally to any element of a program or of a software capable of implementing a function or a function set as described above. A hardware component corresponds to any element of a hardware set (or hardware) capable of implementing a function or a set of functions.

Claims

1. Method for generating knowledge messages from a first road user to at least one assistance device for a second road user, the generation method comprising an integration into said knowledge message d 'at least one calculated datum of the state of the first user of the road.

2. Method for generating knowledge messages of the first user of the road according to the preceding claim, characterized in that the method for generating knowledge messages comprises a calculation of at least one state datum of the first user of the road. .

3. A method of generating knowledge messages of the first road user according to any one of the preceding claims, characterized in that the calculated data of the state of the first road user results from a calculation of at least one of the following types:

- a navigation calculation making it possible to reproduce information relating to a journey intended for the first road user,

4. A method of protecting a first road user comprising

5. A method of protecting a first road user according to the preceding claim, characterized in that the emission is an emission of at least one of the following types:

- a broadcast via a mobile communication network.

6. Method for assisting a second user of the road capable of receiving knowledge messages from a first user of the road, the assistance method comprising processing of knowledge messages received from a first user of the road. route as a function of at least one state datum of the second user of the route.

7. A method for assisting a second road user according to the preceding claim, characterized in that the processing comprises a modification of a driving assistance datum as a function of the knowledge message received and at least a state data item of the second road user.

8. A method of assisting a second road user according to any one of claims 6 or 7, characterized in that the assistance method comprises, if the result of the processing determines a risk, a notification of a alert knowledge message to the second road user.

9. A method of assisting a second road user according to any one of claims 6 or 8, characterized in that the processing comprises a calculation of an updated route as a function of the knowledge message received and at minus one state data item of the second road user.

10. A method of assisting a second road user according to any one of claims 6 or 9, characterized in that the processing comprises a calculation of a command from the second road user as a function of the knowledge message. received and at least one state datum from the second road user.

1 1. Program comprising program code instructions for the execution of the steps of the method of generating knowledge messages according to any one of claims 1 to 3 and / or a method of protecting a first use of the road according to any one of claims 4 or 5 and / or the assistance method according to any one of claims 6 to 10 when said program is executed by a processor.

12. Communication device for a first road user comprising:

13. Device for assisting the driving of a second road user capable of receiving knowledge messages from a first road user, the assistance device comprising a processor for processing knowledge messages received from a first road user as a function of at least one state datum of the second road user.

14. Driving assistance device according to the preceding claim, characterized in that the driving assistance device is implemented in one of the following devices:

- a driving assistance device,

- a navigation device,

- a vehicle control device,

- an autonomous driving device.

15. Communication device for a second road user comprising: