WO2017054293A1 - Traffic warning method, device and system - Google Patents

Abstract

Provided are a traffic warning method, device and system. A second user terminal is obtained on the basis of driving conditions of a first user terminal, and thus when it is necessary to send warning information, the warning information may be sent only to the second user terminal, so that another first user terminal no longer receives the warning information, and the other first user terminal which does not receive the warning information may thus execute a corresponding operation, reducing the probability of the other first user terminal executing an erroneous operation. Therefore, in the present solution, the warning information may be sent only to the second user terminal in a targeted manner, so as to reduce the probability of the other first user terminal (the first user terminal which is not warned) executing an erroneous operation.

Description

Traffic warning method, device and system Technical field

The invention belongs to the technical field of vehicle networks, and more particularly to a traffic warning method, device and system.

Background technique

Vehicle network technology is the core technology of the future 5G (fifth generation mobile communication technology) network developed in recent years. 3GPP (3rd Generation Partnership Project) and 2015 have carried out a lot of research work on vehicle network technology, and The potential technical scenarios of vehicle network technology are given. A traffic information broadcasting system based on a roadside unit is proposed in SA Technical Report TR22.885. As shown in Figure 1, in the scenario shown in Figure 1, the user equipment (User Equipment) is required to send the warning information to the RSU (Road Side Unit). After receiving the warning information, the RSU The first user terminal sends an early warning broadcast.

As can be seen from Figure 1, the early warning information broadcast does not need to be broadcast to all UEs. For the horizontal vehicles A and B for the intersections, if the UEs on the two vehicles receive the warning information, the vehicle A and the vehicle B will be caused. Performing unnecessary error operations, the existing system needs the ability to accurately identify the vehicle's position.

Summary of the invention

In view of this, the present invention provides a traffic warning method, apparatus, and system for transmitting early warning information to certain first user terminals in a targeted manner, thereby reducing the probability of other first user terminals performing erroneous operations. The technical solutions are as follows:

In a first aspect, the present invention provides a traffic warning method, the method comprising:

Obtaining, by the first user terminal or the network side device, the driving condition of the first user terminal;

The network side device determines, according to the driving condition of the first user terminal, whether the driving condition of the first user terminal satisfies a traffic warning condition, and if yes, the network side device sends the first roadside unit to the first roadside unit Send warning information;

The first roadside unit determines a second user terminal that receives the early warning information based on the driving condition of the first user terminal, and sends the early warning information to the second user terminal, where the early warning information is used to trigger The second user terminal performs an operation corresponding to the early warning information.

Preferably, the network side device comprises a second roadside unit and a security server;

The second roadside unit obtains the driving condition of the first user terminal, and determines whether the driving condition of the first user terminal satisfies the traffic warning condition based on the driving condition of the first user terminal, and if so, to the first The roadside unit sends the warning information;

or

The first user terminal or the second roadside unit obtains the driving condition of the first user terminal;

The security server determines whether the driving condition of the first user terminal satisfies a traffic warning condition based on the driving condition of the first user terminal, and if yes, sends the early warning information to the first roadside unit.

Preferably, the second roadside unit or the security server determines the first roadside unit based on the driving condition of the first user terminal.

Preferably, the first user terminal or the network side device obtains the driving situation of the first user terminal, including:

The first user terminal or the network side device obtains a relative position of the first user terminal based on the currently obtained multiple received powers, and obtains, according to the currently obtained multiple received powers and the plurality of received powers obtained last time, The traveling direction of the first user terminal, wherein the received power is obtained by the first user terminal or the second roadside unit after receiving the probe message.

Preferably, the first user terminal or the network side device obtains the driving condition of the first user terminal, and the first user terminal or the network side device obtains the driving parameter of the first user terminal, and is based on The driving parameter is used to obtain the driving state of the first user terminal.

Preferably, the first user terminal obtains a relative position of the first user terminal based on the currently obtained multiple received powers, and obtains a location based on the currently obtained multiple received powers and the plurality of received powers obtained last time. The driving direction of the first user terminal includes:

Receiving, by the first user terminal, a probe message that is periodically broadcasted by multiple second roadside units;

After receiving the respective probe messages, the first user terminal obtains the received power corresponding to each probe message;

The first user terminal compares the currently obtained multiple received powers to obtain a relative position of the first user terminal;

The first user terminal compares each received power currently obtained with the received power obtained by receiving the probe message broadcast by the same second roadside unit last time, to obtain the traveling direction of the first user terminal.

Preferably, the network side device obtains a relative position of the first user terminal based on the currently obtained multiple received powers, and obtains the foregoing according to the currently obtained multiple received powers and the plurality of received powers obtained last time. The driving direction of the first user terminal, including:

The second roadside unit receives the probe message periodically sent by the first user terminal;

After receiving the probe message, the second roadside unit obtains the received power corresponding to the probe message;

The second roadside unit transmits the obtained received power to the other second roadside unit, and receives the received power obtained by the other second roadside unit after receiving the probe message;

The second roadside unit compares the currently obtained multiple received powers to obtain a relative position of the first user terminal, where the currently obtained multiple received powers include that the second roadside unit receives the probe message. The received power obtained afterwards and the received power obtained by the other second roadside unit after receiving the probe message;

The second roadside unit compares each of the currently received received powers with the received power obtained by receiving the probe message broadcast by the same first user terminal, respectively, to obtain the traveling direction of the first user terminal.

In a second aspect, the present invention provides a traffic warning system, where the system includes: a first user terminal, a network side device, a first roadside unit, and a second user terminal;

The first user terminal or the network side device is configured to obtain a driving situation of the first user terminal;

The network side device is configured to determine, according to the driving condition of the first user terminal, whether the driving condition of the first user terminal satisfies a traffic warning condition, and if yes, send the early warning information to the first roadside unit;

The first roadside unit is configured to determine, according to the driving condition of the first user terminal, a second user terminal that receives the early warning information, and send the early warning information to the second user terminal, where the early warning information And configured to trigger the second user terminal to perform an operation corresponding to the early warning information.

Preferably, the network side device comprises a second roadside unit and a security server;

The second roadside unit is configured to obtain a driving condition of the first user terminal, and determine, according to the driving condition of the first user terminal, whether the driving condition of the first user terminal satisfies a traffic warning condition, and if so, Sending early warning information to the first roadside unit; wherein the sending the early warning information to the first roadside unit includes the second roadside unit directly transmitting the early warning information to the first roadside unit, or the second roadside unit passes The security server sends alert information to the first roadside unit.

Preferably, the network side device comprises a second roadside unit and a security server;

The second roadside unit is configured to obtain a driving condition of the first user terminal;

The security server is configured to determine, according to a form of the first user terminal, whether the driving condition of the first user terminal satisfies a traffic warning condition, and if yes, send the early warning information to the first roadside unit.

Preferably, the first roadside unit is determined by a second roadside unit or a security server in the traffic warning system.

In a third aspect, the present invention provides a traffic warning method, the method comprising:

Obtaining the driving condition of the first user terminal;

Determining, according to the driving condition of the first user terminal, whether the driving condition of the first user terminal satisfies a traffic warning condition;

When the driving condition of the first user terminal satisfies the traffic warning condition, the sending the warning information, where the warning information is used to trigger the second user terminal to perform an operation corresponding to the warning information, where the second user terminal is based on The driving condition of the first user terminal is obtained.

Preferably, the obtaining the driving situation of the first user terminal comprises: obtaining a relative position of the first user terminal based on the currently obtained multiple received powers, and based on the currently obtained multiple received powers and the last obtained The plurality of received powers obtain the traveling direction of the first user terminal.

Preferably, the obtaining the driving situation of the first user terminal comprises: obtaining a driving parameter of the first user terminal, and obtaining a driving state of the first user terminal based on the driving parameter.

Preferably, the relative position of the first user terminal is obtained based on the currently obtained multiple received powers, and the first user is obtained based on the currently obtained multiple received powers and the plurality of received powers obtained last time. The direction of travel of the terminal, including:

Obtaining a probe message periodically sent by the first user terminal;

After receiving the probe message, obtaining the received power corresponding to the probe message;

Transmitting the received power to the other second roadside unit, and receiving the received power obtained by the other second roadside unit after receiving the probe message;

Comparing the currently obtained multiple received powers to obtain a relative position of the first user terminal, where the currently obtained multiple received powers include received power obtained by the second roadside unit after receiving the probe message, and other The received power obtained by the second roadside unit after receiving the probe message;

Each of the currently received received powers is compared with the received power obtained by receiving the probe message broadcast by the same first user terminal, respectively, to obtain the traveling direction of the first user terminal.

Preferably, the relative position of the first user terminal is obtained based on the currently obtained multiple received powers, and the first user is obtained based on the currently obtained multiple received powers and the plurality of received powers obtained last time. The direction of travel of the terminal, including:

Acquiring the received power uploaded by the first user terminal, where the received power is obtained by the first user terminal after receiving the probe message periodically broadcasted by the second roadside unit;

Comparing the currently obtained multiple received powers to obtain a relative position of the first user terminal;

Each of the currently received received powers is compared with the received power obtained by receiving the probe message broadcast by the same second roadside unit last time, to obtain the traveling direction of the first user terminal.

In a fourth aspect, the present invention provides a traffic warning device, the device comprising:

a obtaining unit, configured to obtain a driving condition of the first user terminal;

a determining unit, configured to determine, according to the driving condition of the first user terminal, whether the driving condition of the first user terminal meets a traffic warning condition;

a sending unit, configured to send, when the driving condition of the first user terminal meets the traffic warning condition, the warning information, where the warning information is used to trigger the second user terminal to perform an operation corresponding to the warning information, The second user terminal is derived based on the driving condition of the first user terminal.

Preferably, the obtaining unit is configured to obtain a relative position of the first user terminal based on the currently obtained multiple received powers, and obtain, according to the currently obtained multiple received powers and the plurality of received powers obtained last time, The direction of travel of the first user terminal.

Preferably, the obtaining unit is configured to obtain a driving parameter of the first user terminal, and obtain a driving state of the first user terminal based on the driving parameter.

Preferably, the obtaining unit comprises:

a first acquiring subunit, configured to acquire a probe message periodically sent by the first user terminal;

a first calculating subunit, configured to obtain a received power corresponding to the probe message after receiving the probe message;

a radio frequency subunit, configured to send the received power to the other second roadside unit, and receive the received power obtained by the other second roadside unit after receiving the probe message;

a second calculating subunit, configured to compare the currently obtained multiple received powers to obtain a relative position of the first user terminal, where the currently obtained multiple received powers include the second roadside unit receiving the detected The received power obtained after the message and the received power sent by the other second roadside unit;

And a third calculating sub-unit, configured to compare each of the currently received received powers with a received power obtained by receiving the probe message broadcast by the same first user terminal, to obtain a traveling direction of the first user terminal.

Preferably, the obtaining unit comprises:

a second obtaining subunit, configured to obtain a received power uploaded by the first user terminal, where the receiving power The rate is obtained by the first user terminal after receiving the probe message periodically broadcasted by the second roadside unit;

a fourth calculating subunit, configured to compare the currently obtained multiple received powers to obtain a relative position of the first user terminal;

a fifth calculating sub-unit, configured to compare each received power currently obtained with a received power obtained by receiving a probe message broadcast by the same second roadside unit last time, to obtain a traveling direction of the first user terminal .

Compared with the prior art, the above technical solution provided by the present invention has the following advantages:

In the above technical solution provided by the present invention, the second user terminal may be obtained based on at least the driving condition of the first user terminal, so that if the warning information needs to be sent, the warning information may be sent only to the second user terminal, so that the other The first user terminal no longer receives the early warning information, so that the other first user terminal that does not receive the early warning information may perform a corresponding operation, reducing the probability that other first user terminals perform an erroneous operation, that is, the foregoing provided by the present invention. The technical solution can specifically transmit the warning information to the second user terminal only to reduce the probability that other first user terminals (the first user terminal not being alerted) perform an erroneous operation.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are Some embodiments of the present invention may also be used to obtain other drawings based on these drawings without departing from the art.

1 is a schematic diagram of a conventional traffic information broadcasting system based on a roadside unit;

2 is a flow chart of a traffic warning method according to an embodiment of the present invention;

3 is a schematic diagram of a traffic scenario according to an embodiment of the present invention;

4 is a flowchart of obtaining a driving situation of a first user terminal in a traffic warning method according to an embodiment of the present invention;

FIG. 5 is another flowchart of obtaining a driving situation of a first user terminal in a traffic warning method according to an embodiment of the present invention; FIG.

6 is a schematic structural diagram of a traffic warning system according to an embodiment of the present invention;

7 is a flowchart of another traffic warning method according to an embodiment of the present invention;

8 is a flow chart showing the relative position and traveling direction of the first user terminal obtained in the traffic warning method shown in FIG. 7;

9 is another flow chart of obtaining the relative position and the traveling direction of the first user terminal in the traffic warning method shown in FIG. 7;

FIG. 10 is a schematic structural diagram of a traffic warning device according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Referring to FIG. 2, a signaling interaction diagram of a traffic warning method according to an embodiment of the present invention is shown, which may include the following steps:

101: The first user terminal UE or the network side device obtains a driving situation of the first user terminal. The network side device may be an RSU, and the driving condition of the first user terminal is used to indicate that the object where the first user terminal is located is traveling on the road, for example, indicating the driving direction and driving state of the vehicle where the first user terminal is located on the road (at Acceleration state or deceleration state).

In the embodiment of the present invention, the first user terminal or the network side device may obtain the relative position of the first user terminal based on the currently obtained multiple received powers, and based on the plurality of currently received received powers and the multiple times obtained last time. Receiving power, obtaining a traveling direction of the first user terminal, wherein the received power is obtained by the first user terminal or the network side device after receiving the probe message.

That is to say, in the embodiment of the present invention, the relative position and the traveling direction of the first user terminal may be obtained by the first user terminal itself or may be obtained by the network side device. That is, the first user terminal can be divided into a terminal active type and a terminal passive type. For the first active user terminal type, the first user terminal can obtain the relative position and the traveling direction of the first user terminal autonomously, or for the terminal. For the first user terminal of the active type, the first user terminal can autonomously obtain the received power corresponding to the probe message sent by the network side device, and then send the received power obtained by the first user terminal to the network side device, where the network side device To obtain the relative position and direction of travel of the first user terminal. For the first user terminal of the terminal passive type, the first user terminal may periodically send a probe message to the network side device, and the network side device obtains the relative position and the traveling direction of the first user terminal.

In addition to the relative position and the direction of travel, the driving situation may also include other information, such as a driving state, which is used to at least indicate whether the first user terminal is in an accelerated state or a decelerating state, and in the embodiment of the invention, the driving state may be based on The driving parameters of the first user terminal are obtained. The driving parameters include at least: a running speed and an acceleration, which can be obtained by a speed sensor installed in the first user terminal, and the acceleration can be obtained by an acceleration sensor installed in the first user terminal. Based on the driving speed and acceleration, especially the acceleration, it can be determined whether the current object of the first user terminal is in an acceleration state or a deceleration state. Of course, in addition to the driving speed and the acceleration to obtain the driving state of the first user terminal, the braking instruction information of the vehicle where the first user terminal is located may be further obtained, which is not described in the embodiment of the present invention.

102: The network side device determines, according to the driving condition of the first user terminal, whether the driving condition of the first user terminal satisfies the traffic warning condition, and if yes, the network side device sends the early warning information to the first roadside unit.

Since the driving situation of the first user terminal is used to indicate that the object of the first user terminal is traveling on the road, it may be determined whether the traffic warning condition is met, that is, the object of the first user terminal is determined based on the driving condition of the first user terminal. Whether you are in illegal driving.

For example, based on the driving direction and the relative position in the driving situation, it can be obtained in which direction the object of the first user terminal is traveling, and then there is a possibility that the object colliding with the traveling direction collides, so the first direction can be judged based on the traveling direction and the relative position. Whether the driving condition of the user terminal satisfies the traffic warning condition. As shown in the application scenario shown in Figure 1, the driving situation obtained by the first user terminal worn by the pedestrian indicates that the pedestrian is crossing the road, and the traffic information indicates that the pedestrian is illegally wearing a red light, so that the vehicle passing through the intersection where the pedestrian is located may collide with the vehicle. At the time, it can be judged that the driving condition of the first user terminal satisfies the traffic warning condition.

In order to improve the accuracy of the judgment, the embodiment of the present invention combines the driving state in the traveling direction and the relative position to evaluate how long the object of the first user terminal passes through the intersection, whether it is in an acceleration state or a deceleration state, so that the network side device can be based thereon. Determine whether the traffic warning condition is met to send the warning information. The network side device may further combine the traffic information to determine whether the traffic warning condition is met. For example, after obtaining the driving condition of the first user terminal, the traffic light of the current intersection is a red light green light to determine whether the traffic warning condition is met, if the first The relative position of the object where the user terminal is located indicates that the vehicle or pedestrian is within the intersection and is in the acceleration state to move toward the intersection. At present, the traffic light at the intersection is a red light, indicating that the vehicle or the pedestrian is to traverse the red light, so that the judgment can be satisfied at this time. Traffic warning conditions, sending warning information to instruct other vehicles to pay attention to violations.

In the embodiment of the present invention, the network side device includes at least a second roadside unit and a security server, and the working process of the second roadside unit and the security server may be in the following manners. Ways to execute:

One way is that the second roadside unit obtains the driving condition of the first user terminal, and determines whether the driving condition of the first user terminal satisfies the traffic warning condition, and if the second roadside unit determines the driving condition based on the first user terminal. a roadside unit that sends warning information to the first roadside unit;

Another way is: the second roadside unit obtains the driving condition of the first user terminal, and determines whether the driving condition of the first user terminal satisfies the traffic warning condition, and if yes, sends the driving condition of the first user terminal to Security server. The security server determines the first roadside unit based on the driving condition of the first user terminal, and sends the warning information to the first roadside unit;

Another way is: the second roadside unit obtains the driving condition of the first user terminal, determines whether the driving condition of the first user terminal satisfies the traffic warning condition, and if the second roadside unit determines based on the driving condition of the first user terminal a first roadside unit, and triggering the security server to send the warning information to the first roadside unit;

The other way is: the second roadside unit will obtain the information required for the driving situation of the first user terminal, such as receiving power, etc., and send it to the security server, and the security server obtains the driving condition of the first user terminal, and determines the driving of the first user terminal. Whether the situation meets the traffic warning conditions, if it is a security service The first roadside unit is determined based on the driving condition of the first user terminal, and the warning information is transmitted to the first roadside unit.

The first roadside unit described above is a second roadside unit for transmitting early warning information to other first user terminals that may have an accident with a vehicle or pedestrian that is in violation. In the embodiment of the present invention, the manner of obtaining the first roadside unit may be: the second roadside unit or the security server obtains the location of the second user terminal according to the relative position of the early warning user terminal, and then based on each second roadside unit. The location information is used to obtain the second roadside unit to which the second user terminal belongs, such that the second roadside unit to which the second user terminal belongs is the first roadside unit. The early warning user terminal is the first user terminal that satisfies the traffic warning condition, and the second roadside unit to which the second user terminal belongs is the second roadside unit whose signal range covers the second user terminal.

When the second roadside unit to which the second user terminal belongs includes more than one, the second roadside unit may be selected as the first roadside unit; of course, it is also possible to determine the second roadside unit and the need to send the warning information. The first roadside unit that sends the early warning information to the second user terminal is the same second roadside unit. In this case, if the first roadside unit is obtained by the security server, the security server returns the warning information. To the second roadside unit, if the first roadside unit is obtained by the second roadside unit, the second roadside unit may directly send the warning information to the second user terminal.

103: The first roadside unit determines, according to the driving condition of the first user terminal, the second user terminal that receives the early warning information, and sends the early warning information to the second user terminal, where the early warning information is used to trigger the second user terminal to perform the corresponding to the early warning information. operating.

In the embodiment of the present invention, the first roadside unit may obtain an approximate range of the first user terminal based on the relative position and the traveling direction, such as which intersection is located, and the first roadside unit may further determine the first based on the traveling speed and the acceleration. The time and speed of the vehicle or pedestrian where the user terminal is located through the intersection, so that the first user terminal having a driving conflict with the first user terminal is the second user terminal. If the second roadside unit in FIG. 1 detects that the pedestrian has an illegal crossing behavior, the first user terminal in the vehicle D and the vehicle E is the second user terminal. At this time, the first roadside unit sends the warning information to the second user terminal, and the second user terminal sends an early warning alarm to stop the driver from giving off. The warning alarm can be an audible alarm, a vibration alarm or any other prompting method.

It can be seen from the above technical solution that the traffic warning method provided by the present invention can obtain the second user terminal based on at least the driving condition of the first user terminal, so that the warning information can be sent only to the second user if the warning information needs to be sent. The terminal causes the other first user terminals to no longer receive the early warning information, so that the other first user terminals that have not received the early warning information can perform the corresponding operations, thereby reducing the probability that other first user terminals perform the wrong operation, that is, the present The above technical solution provided by the invention can specifically transmit the warning information only to the second user terminal, so as to reduce the probability that other first user terminals (the first user terminal not being alerted) perform an erroneous operation.

The driving situation of the first user terminal or the network side device based on the received power is used to describe the driving situation of the first user terminal. The network side device is shown in FIG. 3 as four second roadside units, denoted as RSU1, RSU2, RSU3, and RSU4, respectively. For the first user terminal to actively obtain the driving situation, the flowchart thereof is as shown in FIG. 4, and may include the following steps:

201: The first user terminal receives a probe message that is sent by a plurality of second roadside units periodically.

202: After receiving the respective probe messages, the first user terminal obtains the received power corresponding to each probe message. The received power can be predicted according to the signal strength. There are various ways to predict the received power according to the signal strength in the prior art, which is not described in the embodiment of the present invention.

203: The first user terminal compares the currently received multiple received powers to obtain a relative location of the first user terminal. The method of obtaining position information is to compare the signal difference between a plurality of signals. That is, the first user terminal obtains the relative position of the first user terminal according to the obtained difference of the multiple received powers. As shown in FIG. 3, the first user terminal obtains the received powers of the probe messages sent by the RSU1, the RSU2, the RSU3, and the RSU4, respectively. Yes: A1, A2, A3 and A4.

If it is found by comparison: A1>A2 indicates that the first user terminal is close to the RSU1 side. If A1>A3 and A1>A4 in the case of A1>A2, and both A2 and A1 are much larger than A3 and A4, the first user is explained. The terminal is close to the RSU1 and away from the RSU3 and RSU4 sides, so the relative position of the first user terminal can be obtained after comparing the plurality of received powers. It is of course also possible to locate the relative position of the first user terminal based on the transmit power and the received power.

204: The first user terminal separately obtains each received power separately from the previous reception. The received power obtained after the probe message broadcasted by the second roadside unit is compared to obtain the traveling direction of the first user terminal. That is to say, the first user terminal determines the direction of the received power in the multiple measurement process according to the detection message sent by the multiple RSUs, and determines the location where the UE approaches or moves away from each RSU, thereby determining the traveling direction. It should also be noted that when comparing the trend of the received power obtained by the probe messages sent by multiple RSUs in multiple measurements, the probe messages sent by the same second roadside unit are compared.

Still taking FIG. 3 as an example, the received powers obtained at time T0 are A1', A2', A3', and A4', respectively, compared with the received powers A1, A2, A3, and A4 obtained at time T1, when A1'<A1. A2'<A2, A3'<A3 and A4'<A4, it can be judged that the first user terminal is moving in the direction toward the RSU1 and gradually approaching the RSU3 and the RSU4. Of course, if it is found that A1'>A1, A2'>A2 but A3'<A3, A4'<A4, it can be explained that the first user terminal is facing RSU3 and RSU4, but has traveled farther away from the positions of RSU1 and RSU2. In this way, the approximate driving direction of the first user terminal can be determined, and the first user terminal can be instructed to arrive at the intersection or have left the intersection.

As shown in FIG. 5, when the network side device is the second roadside unit, the second roadside unit obtains the running condition of the first user terminal, which may include the following steps:

301: The second roadside unit receives the probe message periodically sent by the first user equipment.

302: After receiving the probe message, the second roadside unit obtains the received power corresponding to the probe message.

303: The second roadside unit sends the received power to the other second roadside unit, and receives the received power obtained by the other second roadside unit after receiving the probe message, so that the second roadside unit can obtain the same first The received power of the user terminal in different second roadside units enables the second roadside unit to compare the plurality of received powers of the same first user terminal to obtain the relative position and the traveling direction of the first user terminal.

304: The second roadside unit compares the currently received multiple received powers to obtain a relative position of the first user terminal, where the currently obtained multiple received powers include the received by the second roadside unit after receiving the probe message. The received power obtained by the power and other second roadside units after receiving the probe message.

305: The second roadside unit separately obtains each received power separately from the previous reception. The received power obtained after the probe message broadcasted by the first user terminal is compared to obtain the traveling direction of the first user terminal.

In the embodiment of the present invention, the manner in which the second roadside unit obtains the relative position and the traveling direction in the running condition is the same as the corresponding step in the above-mentioned flowchart shown in FIG. 4, which is not described in the embodiment of the present invention. Of course, in addition to the above received power, the embodiment of the present invention can also use the time difference to obtain the relative position and the traveling direction, wherein the time difference is the difference between the sending time and the receiving time of the same probe message, and the principle of receiving power can also be adopted by the same. The relative position and the direction of travel are obtained, which are not described in detail in the embodiments of the present invention.

Corresponding to the method embodiment shown in FIG. 1 , the embodiment of the present invention further provides a traffic warning system, as shown in FIG. 6 , which may include: a first user terminal 11 , a network side device 12 , and a first roadside unit 13 . And a second user terminal 14.

The first user terminal 11 or the network side device 12 is configured to obtain the driving condition of the first user terminal. The driving situation of the first user terminal is used to indicate that the object where the first user terminal is located is driving on the road, for example, indicating the traveling direction and driving state (in an acceleration state or a deceleration state) of the vehicle where the first user terminal is located on the road.

In the embodiment of the present invention, the first user terminal or the network side device may obtain the relative position of the first user terminal based on the currently obtained multiple received powers, and based on the plurality of currently received received powers and the multiple times obtained last time. The receiving power is obtained, and the driving direction of the first user terminal is obtained. The receiving power is obtained by the first user terminal or the network side device after receiving the detection message. For details, refer to the flowcharts shown in FIG. 4 and FIG. 5 above.

In addition to the relative position and the direction of travel, the driving situation may also include other information, such as a driving state, which is used to at least indicate whether the first user terminal is in an accelerated state or a decelerating state, and in the embodiment of the invention, the driving state may be based on The driving parameters of the first user terminal are obtained. The driving parameters include at least: a running speed and an acceleration, which can be obtained by a speed sensor installed in the first user terminal, and the acceleration can be obtained by an acceleration sensor installed in the first user terminal. Based on the driving speed and acceleration, especially the acceleration can determine the current Whether the object where the user terminal is located is in an accelerated state or a decelerated state. Of course, in addition to the driving speed and the acceleration to obtain the driving state of the first user terminal, the braking instruction information of the vehicle where the first user terminal is located may be further obtained, which is not described in the embodiment of the present invention.

The network side device 12 is configured to determine, according to the driving condition of the first user terminal, whether the driving condition of the first user terminal satisfies the traffic warning condition, and if yes, send the early warning information to the first roadside unit. Since the driving situation of the first user terminal is used to indicate that the object of the first user terminal is traveling on the road, it may be determined whether the traffic warning condition is met, that is, the object of the first user terminal is determined based on the driving condition of the first user terminal. Whether you are in illegal driving.

For example, based on the driving direction and the relative position in the driving situation, it can be obtained in which direction the object of the first user terminal is traveling, and then there is a possibility that the object colliding with the traveling direction collides, so the first direction can be judged based on the traveling direction and the relative position. Whether the driving condition of the user terminal satisfies the traffic warning condition. As shown in the application scenario shown in Figure 1, the driving situation obtained by the first user terminal worn by the pedestrian indicates that the pedestrian is crossing the road, and the traffic information indicates that the pedestrian is illegally wearing a red light, so that the vehicle passing through the intersection where the pedestrian is located may collide with the vehicle. At the time, it can be judged that the driving condition of the first user terminal satisfies the traffic warning condition.

In order to improve the accuracy of the judgment, the embodiment of the present invention combines the driving state in the traveling direction and the relative position to evaluate how long the object of the first user terminal passes through the intersection, whether it is in an acceleration state or a deceleration state, so that the network side device can be based thereon. Determine whether the traffic warning condition is met to send the warning information. The network side device may further combine the traffic information to determine whether the traffic warning condition is met. For example, after obtaining the driving condition of the first user terminal, the traffic light of the current intersection is a red light green light to determine whether the traffic warning condition is met, if the first The relative position of the object where the user terminal is located indicates that the vehicle or pedestrian is within the intersection and is in the acceleration state to move toward the intersection. At present, the traffic light at the intersection is a red light, indicating that the vehicle or the pedestrian is to traverse the red light, so that the judgment can be satisfied at this time. Traffic warning conditions, sending warning information to instruct other vehicles to pay attention to violations.

In the embodiment of the present invention, the network side device includes at least a second roadside unit and a security server, and the working process of the second roadside unit and the security server may be in the following manners. In the process, it can be executed in any way:

One way is that the second roadside unit obtains the driving condition of the first user terminal, and determines whether the driving condition of the first user terminal satisfies the traffic warning condition, and if the second roadside unit determines the driving condition based on the first user terminal. a roadside unit that sends warning information to the first roadside unit;

Another way is: the second roadside unit obtains the driving condition of the first user terminal, and determines whether the driving condition of the first user terminal satisfies the traffic warning condition, and if yes, sends the driving condition of the first user terminal to Security server. The security server determines the first roadside unit based on the driving condition of the first user terminal, and sends the warning information to the first roadside unit;

Another way is: the second roadside unit obtains the driving condition of the first user terminal, determines whether the driving condition of the first user terminal satisfies the traffic warning condition, and if the second roadside unit determines based on the driving condition of the first user terminal a first roadside unit, and triggering the security server to send the warning information to the first roadside unit;

The other way is: the second roadside unit will obtain the information required for the driving situation of the first user terminal, such as receiving power, etc., and send it to the security server, and the security server obtains the driving condition of the first user terminal, and determines the driving of the first user terminal. Whether the situation satisfies the traffic warning condition, if the security server determines the first roadside unit based on the driving condition of the first user terminal, and sends the warning information to the first roadside unit.

The first roadside unit described above is a second roadside unit for transmitting early warning information to other first user terminals that may have an accident with a vehicle or pedestrian that is in violation. In the embodiment of the present invention, the manner of obtaining the first roadside unit may be: the second roadside unit or the security server obtains the location of the second user terminal according to the relative position of the early warning user terminal, and then based on each second roadside unit. The location information is used to obtain the second roadside unit to which the second user terminal belongs, such that the second roadside unit to which the second user terminal belongs is the first roadside unit. The early warning user terminal is the first user terminal that satisfies the traffic warning condition, and the second roadside unit to which the second user terminal belongs is the second roadside unit whose signal range covers the second user terminal.

When the second roadside unit to which the second user terminal belongs includes more than one, the second roadside unit may be selected as the first roadside unit; of course, it is also possible to determine the second information that needs to send the warning information. The roadside unit and the first roadside unit that needs to send the warning information to the second user terminal are the same second roadside unit. In this case, if the first roadside unit is obtained by the security server, the security server will The warning information is transmitted back to the second roadside unit. If the first roadside unit is obtained by the second roadside unit, the second roadside unit can directly send the early warning information to the second user terminal.

The first roadside unit 13 is configured to determine, according to the driving condition of the first user terminal, the second user terminal that receives the early warning information, and send the early warning information to the second user terminal, where the early warning information is used to trigger the second user terminal to execute the early warning information. Corresponding operation.

In the embodiment of the present invention, the first roadside unit may obtain an approximate range of the first user terminal based on the relative position and the traveling direction, such as which intersection is located, and the first roadside unit may further determine the first based on the traveling speed and the acceleration. The time and speed of the vehicle or pedestrian where the user terminal is located through the intersection, so that the first user terminal having a driving conflict with the first user terminal is the second user terminal. If the second roadside unit in FIG. 1 detects that the pedestrian has an illegal crossing behavior, the first user terminal in the vehicle D and the vehicle E is the second user terminal. At this time, the first roadside unit sends the warning information to the second user terminal, and the second user terminal sends an early warning alarm to stop the driver from giving off. The warning alarm can be an audible alarm, a vibration alarm or any other prompting method.

It can be seen from the above technical solution that the traffic warning system provided by the present invention can obtain the second user terminal based on at least the driving condition of the first user terminal, so that the warning information can be sent only to the second user if the warning information needs to be sent. The terminal causes the other first user terminals to no longer receive the early warning information, so that the other first user terminals that have not received the early warning information can perform the corresponding operations, thereby reducing the probability that other first user terminals perform the wrong operation, that is, the present The above technical solution provided by the invention can specifically transmit the warning information only to the second user terminal, so as to reduce the probability that other first user terminals (the first user terminal not being alerted) perform an erroneous operation.

Please refer to FIG. 7 , which is a flowchart of another traffic warning method according to an embodiment of the present invention, which may include the following steps:

701: Obtain a driving condition of the first user terminal. The driving situation of the first user terminal is used to indicate that the object where the first user terminal is located is traveling on the road, for example, indicating the first user terminal. The direction of travel and the state of travel of the vehicle on the road (in an accelerated state or a decelerated state).

In the embodiment of the present invention, the first user terminal or the network side device may obtain the relative position of the first user terminal based on the currently obtained multiple received powers, and based on the plurality of currently received received powers and the multiple times obtained last time. Receiving power, obtaining a traveling direction of the first user terminal, wherein the received power is obtained by the first user terminal or the network side device after receiving the probe message.

That is to say, in the embodiment of the present invention, the relative position and the traveling direction of the first user terminal may be obtained by the first user terminal itself or may be obtained by the network side device. That is, the first user terminal can be divided into a terminal active type and a terminal passive type. For the first active user terminal type, the first user terminal can independently obtain the relative position and the traveling direction of the first user terminal, and the relative position. And the driving direction is sent to the network side device, or for the first user terminal of the terminal active type, the first user terminal can obtain the receiving power corresponding to the detection message sent by the network side device, and then obtain the first user terminal. The received power is sent to the network side device, and the network side device obtains the relative position and the traveling direction of the first user terminal. For the first user terminal of the terminal passive type, the first user terminal may periodically send a probe message to the network side device, and the network side device obtains the relative position and the traveling direction of the first user terminal.

In addition to the relative position and the direction of travel, the driving situation may also include other information, such as a driving state, which is used to at least indicate whether the first user terminal is in an accelerated state or a decelerating state, and in the embodiment of the invention, the driving state may be based on The driving parameters of the first user terminal are obtained. The driving parameters include at least: a running speed and an acceleration, which can be obtained by a speed sensor installed in the first user terminal, and the acceleration can be obtained by an acceleration sensor installed in the first user terminal. Based on the driving speed and acceleration, especially the acceleration, it can be determined whether the current object of the first user terminal is in an acceleration state or a deceleration state. Of course, in addition to the driving speed and the acceleration to obtain the driving state of the first user terminal, the braking instruction information of the vehicle where the first user terminal is located may be further obtained, which is not described in the embodiment of the present invention.

702: Determine, according to the driving condition of the first user terminal, whether the driving condition of the first user terminal satisfies the traffic warning condition.

703: Send warning information when the driving condition of the first user terminal satisfies the traffic warning condition. The warning information is used to trigger the second user terminal to perform an operation corresponding to the warning information, and the first user terminal of the early warning information is obtained based on the driving condition of the first user terminal.

Since the driving situation of the first user terminal is used to indicate that the object of the first user terminal is traveling on the road, it may be determined whether the traffic warning condition is met, that is, the object of the first user terminal is determined based on the driving condition of the first user terminal. Whether you are in illegal driving.

For example, based on the driving direction and the relative position in the driving situation, it can be obtained in which direction the object of the first user terminal is traveling, and then there is a possibility that the object colliding with the traveling direction collides, so the first direction can be judged based on the traveling direction and the relative position. Whether the driving condition of the user terminal satisfies the traffic warning condition. As shown in the application scenario shown in Figure 1, the driving situation obtained by the first user terminal worn by the pedestrian indicates that the pedestrian is crossing the road, and the traffic information indicates that the pedestrian is illegally wearing a red light, so that the vehicle passing through the intersection where the pedestrian is located may collide with the vehicle. At the time, it can be judged that the driving condition of the first user terminal satisfies the traffic warning condition.

In order to improve the accuracy of the judgment, the embodiment of the present invention combines the driving state in the traveling direction and the relative position to evaluate how long the object of the first user terminal passes through the intersection, whether it is in an acceleration state or a deceleration state, so that the network side device can be based thereon. Determine whether the traffic warning condition is met to send the warning information. The network side device may further combine the traffic information to determine whether the traffic warning condition is met. For example, after obtaining the driving condition of the first user terminal, the traffic light of the current intersection is a red light green light to determine whether the traffic warning condition is met, if the first The relative position of the object where the user terminal is located indicates that the vehicle or pedestrian is within the intersection and is in the acceleration state to move toward the intersection. At present, the traffic light at the intersection is a red light, indicating that the vehicle or the pedestrian is to traverse the red light, so that the judgment can be satisfied at this time. Traffic warning conditions, sending warning information to instruct other vehicles to pay attention to violations.

In the embodiment of the present invention, the network side device includes at least a second roadside unit and a security server, and the working process of the second roadside unit and the security server may be in the following manners. Ways to execute:

One way is that the second roadside unit obtains the driving condition of the first user terminal, and determines whether the driving condition of the first user terminal satisfies the traffic warning condition, and if the second roadside unit is based on the first use The driving condition of the terminal determines the first roadside unit, and sends the warning information to the first roadside unit;

Another way is: the second roadside unit obtains the driving condition of the first user terminal, and determines whether the driving condition of the first user terminal satisfies the traffic warning condition, and if yes, sends the driving condition of the first user terminal to Security server. The security server determines the first roadside unit based on the driving condition of the first user terminal, and sends the warning information to the first roadside unit;

Another way is: the second roadside unit obtains the driving condition of the first user terminal, determines whether the driving condition of the first user terminal satisfies the traffic warning condition, and if the second roadside unit determines based on the driving condition of the first user terminal a first roadside unit, and triggering the security server to send the warning information to the first roadside unit;

The other way is: the second roadside unit will obtain the information required for the driving situation of the first user terminal, such as receiving power, etc., and send it to the security server, and the security server obtains the driving condition of the first user terminal, and determines the driving of the first user terminal. Whether the situation satisfies the traffic warning condition, if the security server determines the first roadside unit based on the driving condition of the first user terminal, and sends the warning information to the first roadside unit.

The first roadside unit described above is a second roadside unit for transmitting early warning information to other first user terminals that may have an accident with a vehicle or pedestrian that is in violation. In the embodiment of the present invention, the manner of obtaining the first roadside unit may be: the second roadside unit or the security server obtains the location of the second user terminal according to the relative position of the early warning user terminal, and then based on each second roadside unit. The location information is used to obtain the second roadside unit to which the second user terminal belongs, such that the second roadside unit to which the second user terminal belongs is the first roadside unit. The early warning user terminal is the first user terminal that satisfies the traffic warning condition, and the second roadside unit to which the second user terminal belongs is the second roadside unit whose signal range covers the second user terminal.

When the second roadside unit to which the second user terminal belongs includes more than one, the second roadside unit may be selected as the first roadside unit; of course, it is also possible to determine the second roadside unit and the need to send the warning information. The first roadside unit that sends the early warning information to the second user terminal is the same second roadside unit. In this case, if the first roadside unit is obtained by the security server, the security server returns the warning information. Give the second roadside unit, if it is the first by the second roadside unit The roadside unit can send the early warning information directly to the second user terminal by the second roadside unit.

In the embodiment of the present invention, the first roadside unit may obtain an approximate range of the first user terminal based on the relative position and the traveling direction, such as which intersection is located, and the first roadside unit may further determine the first based on the traveling speed and the acceleration. The time and speed of the vehicle or pedestrian where the user terminal is located through the intersection, so that the first user terminal having a driving conflict with the first user terminal is the second user terminal. If the second roadside unit in FIG. 1 detects that the pedestrian has an illegal crossing behavior, the first user terminal in the vehicle D and the vehicle E is the second user terminal. At this time, the first roadside unit sends the warning information to the second user terminal, and the second user terminal sends an early warning alarm to stop the driver from giving off. The warning alarm can be an audible alarm, a vibration alarm or any other prompting method.

It can be seen from the above technical solution that the traffic warning method provided by the present invention can obtain the second user terminal based on at least the driving condition of the first user terminal, so that the warning information can be sent only to the second user if the warning information needs to be sent. The terminal causes the other first user terminals to no longer receive the early warning information, so that the other first user terminals that have not received the early warning information can perform the corresponding operations, thereby reducing the probability that other first user terminals perform the wrong operation, that is, the present The above technical solution provided by the invention can specifically transmit the warning information only to the second user terminal, so as to reduce the probability that other first user terminals (the first user terminal not being alerted) perform an erroneous operation.

In the embodiment of the present invention, the manner of obtaining the relative position and the traveling direction may include, but is not limited to, the flowchart shown in FIG. 8 and FIG. 9 described below. FIG. 8 shows a manner of obtaining the relative position and the traveling direction in the embodiment of the present invention, which may include the following steps:

801: Acquire a probe message periodically sent by the first user terminal.

802: After receiving the probe message, obtain the received power corresponding to the probe message. The received power can be predicted according to the signal strength. There are various ways to predict the received power according to the signal strength in the prior art, which is not described in the embodiment of the present invention.

803: Send the received power to the other second roadside unit, and receive the received power obtained by the other second roadside unit after receiving the probe message, so that the second roadside unit can obtain the same first user terminal in different numbers. The received power in the two-way unit enables the second roadside unit to compare the multiple received powers of the same first user terminal to obtain the relative position of the first user terminal and Direction of travel.

804: Compare the currently obtained multiple received powers to obtain a relative position of the first user terminal, where the currently obtained multiple received powers include the received power obtained by the second roadside unit after receiving the probe message, and other second The received power obtained by the roadside unit after receiving the probe message.

805: Compare each received power currently obtained with the received power obtained by receiving the probe message broadcast by the same first user terminal last time, to obtain a traveling direction of the first user terminal.

In the embodiment of the present invention, the manner in which the second roadside unit obtains the relative position and the traveling direction is the same as the corresponding step in the flowchart shown in FIG. 4, which is not described in the embodiment of the present invention.

Please refer to FIG. 9 , which illustrates another manner of obtaining the above relative position and driving direction in the embodiment of the present invention, which may include the following steps:

901: Obtain a received power uploaded by the first user terminal, where the received power is obtained by the first user terminal after receiving the probe message periodically broadcasted by the second roadside unit.

902: Compare the currently obtained multiple received powers to obtain a relative position of the first user terminal.

903: Compare each received power currently obtained with a received power obtained by receiving a probe message broadcast by the same second roadside unit last time, to obtain a traveling direction of the first user terminal.

In the embodiment of the present invention, the manner in which the second roadside unit obtains the relative position and the traveling direction is the same as the corresponding step in the flowchart shown in FIG. 4, which is not described in the embodiment of the present invention.

Corresponding to the method embodiment shown in FIG. 7 , the embodiment of the present invention further provides a traffic warning device. The schematic diagram of the structure is as shown in FIG. 10 , and may include: an obtaining unit 20 , a determining unit 21 , and a sending unit 22 .

The obtaining unit 20 is configured to obtain a driving situation of the first user terminal. The driving situation of the first user terminal is used to indicate that the object where the first user terminal is located is driving on the road, for example, indicating the traveling direction and driving state (in an acceleration state or a deceleration state) of the vehicle where the first user terminal is located on the road.

In the embodiment of the present invention, the obtaining unit may obtain the relative position of the first user terminal based on the currently obtained multiple received powers, and obtain the first based on the plurality of currently received received powers and the plurality of received powers obtained last time. The traveling direction of the user terminal, wherein the received power is obtained by the first user terminal or the network side device after receiving the probe message.

In addition to the relative position and the direction of travel, the driving situation may also include other information, such as a driving state, which is used to at least indicate whether the first user terminal is in an accelerated state or a decelerating state, and in the embodiment of the invention, the driving state may be based on The driving parameters of the first user terminal are obtained. The driving parameters include at least: a running speed and an acceleration, which can be obtained by a speed sensor installed in the first user terminal, and the acceleration can be obtained by an acceleration sensor installed in the first user terminal. Based on the driving speed and acceleration, especially the acceleration, it can be determined whether the current object of the first user terminal is in an acceleration state or a deceleration state. Of course, in addition to the driving speed and the acceleration to obtain the driving state of the first user terminal, the braking instruction information of the vehicle where the first user terminal is located may be further obtained, which is not described in the embodiment of the present invention.

The determining unit 21 is configured to determine, according to the driving condition of the first user terminal, whether the driving condition of the first user terminal satisfies the traffic warning condition. Since the driving situation of the first user terminal is used to indicate that the object of the first user terminal is traveling on the road, it may be determined whether the traffic warning condition is met, that is, the object of the first user terminal is determined based on the driving condition of the first user terminal. For the specific judgment process, refer to the related description in the foregoing method embodiment, which is not described in the embodiment of the present invention.

The sending unit 22 is configured to: when the driving condition of the first user terminal meets the traffic warning condition, send the warning information, where the warning information is used to trigger the second user terminal to perform an operation corresponding to the warning information, where the second user terminal is based on the first user terminal The driving situation is obtained.

For example, based on the relative position and the driving direction, the approximate range of the first user terminal is obtained, such as at which intersection, and the time and speed of the vehicle or pedestrian passing through the intersection determined by the first user terminal based on the driving speed and the acceleration, and thus the first user terminal The first user terminal having a driving conflict is the second user terminal. If the second roadside unit in FIG. 1 detects that the pedestrian has an illegal crossing behavior, the first user terminal in the vehicle D and the vehicle E is the second user terminal. At this point the first roadside unit will The warning information is sent to the second user terminal, and the second user terminal will issue an early warning alarm to stop the driver from giving off. The warning alarm can be an audible alarm, a vibration alarm or any other prompting method.

It can be seen from the above technical solution that the traffic warning device provided by the present invention can obtain the second user terminal based on at least the driving condition of the first user terminal, so that the warning information can be sent only to the second user if the warning information needs to be sent. The terminal causes the other first user terminals to no longer receive the early warning information, so that the other first user terminals that have not received the early warning information can perform the corresponding operations, thereby reducing the probability that other first user terminals perform the wrong operation, that is, the present The above technical solution provided by the invention can specifically transmit the warning information only to the second user terminal, so as to reduce the probability that other first user terminals (the first user terminal not being alerted) perform an erroneous operation.

In the embodiment of the present invention, the obtaining unit 20 may include: a first obtaining subunit, a first calculating subunit, a radio frequency subunit, a second calculating subunit, and a third calculating subunit. among them

The first obtaining subunit is configured to acquire a probe message that is periodically sent by the first user terminal.

The first calculating subunit is configured to obtain the received power corresponding to the probe message after receiving the probe message. The received power can be predicted according to the signal strength. There are various ways to predict the received power according to the signal strength in the prior art, which is not described in the embodiment of the present invention.

The radio frequency subunit is configured to send the received power to the other second roadside unit, and receive the received power obtained by the other second roadside unit after receiving the probe message, so that the second roadside unit can obtain the same first user. The received power of the terminal in different second roadside units enables the second roadside unit to compare the plurality of received powers of the same first user terminal to obtain the relative position and the traveling direction of the first user terminal.

a second calculating subunit, configured to compare the currently obtained multiple received powers to obtain a relative position of the first user terminal, where the currently obtained multiple received powers include the second roadside unit obtained after receiving the probe message Received power and received power obtained by other second roadside units after receiving the probe message.

And a third calculating sub-unit, configured to compare each of the currently received received powers with the received power obtained by receiving the probe message broadcast by the same first user terminal, to obtain a traveling direction of the first user terminal.

In the embodiment of the present invention, the manner in which the second computing subunit obtains the relative position and the third computing subunit obtains the traveling direction is the same as the corresponding step in the flowchart shown in FIG. 4, which is not described in the embodiment of the present invention. .

Or in the embodiment of the present invention, the obtaining unit 20 may include: a second obtaining subunit, a fourth calculating subunit, and a fifth calculating subunit.

And a second obtaining subunit, configured to obtain the received power uploaded by the first user terminal, where the received power is obtained by the first user terminal after receiving the probe message periodically broadcasted by the second roadside unit.

And a fourth calculating subunit, configured to compare the currently obtained multiple received powers to obtain a relative position of the first user terminal.

And a fifth calculating sub-unit, configured to compare each of the currently received received powers with the received power obtained by receiving the probe message broadcast by the same second roadside unit last time, to obtain a traveling direction of the first user terminal.

It should be noted that in the embodiment of the present invention, each probe message in the foregoing embodiment may be sent by using a pre-agreed transmit power, so that the probe message may not carry the farmer's road. If the transmit power is not agreed in advance, the transmit power needs to be carried in the probe message. The transmit power is used to indicate the power used to send the probe message each time. When the transmit power in the probe message received multiple times is the same, the received power received multiple times can be directly compared; if the received probe message is received, When the transmission powers are different, the received power needs to be processed accordingly and then compared. As shown in FIG. 3, the transmit power of the RSU1 when the probe message is broadcasted at time T0 is 50 dbm, and the received power obtained by the first user terminal is 24 dbm. If the broadcast power is broadcasted at the time T1, the transmit power is 24 bdm, the first user. When the receiving power obtained by the terminal is 14 dbm, if the transmitting message does not carry the transmitting power, the obtained driving direction of the first user terminal is far away from the RSU1, but actually is close to the RSU1, so the transmitting power needs to be carried in the probe message.

In addition, the probe message in the foregoing embodiment may adopt a message in a D2D discovery technology, such as a D2D discovery message or a D2D communication message, and the same first user terminal goes to the second. Various information uploaded by the roadside unit can also be carried and uploaded in the feedback message, wherein the feedback message can also be used. A message in the D2D discovery technology, such as a D2D discovery message or a D2D communication message.

And the reason why the receiving power can be used to obtain the relative position and the driving direction is that the building environment is relatively simple considering that the intersection area is relatively open, so that it can be assumed that the first user terminal in the intersection has a visible route to each RSU, that is, the influence road The biggest factor of loss is distance; it can be assumed that the shadow fading difference due to building occlusion is strongly correlated, that is, the shadow fading value is similar. Therefore, the relative position and the traveling direction of the first user terminal can be obtained by using the received power of the above-mentioned probe message to achieve positioning of the first user terminal, and the method is relative to GPS positioning (Global Positioning System). The technique is simpler and the positioning accuracy is not affected by the distance between the first user terminals.

It should be noted that each embodiment in the specification is described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same similar parts between the embodiments are referred to each other. can. For the device type embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment.

Finally, it should also be noted that in this context, relational terms such as first and second are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these entities. There is any such actual relationship or order between operations. Furthermore, the term "comprises" or "comprises" or "comprises" or any other variations thereof is intended to encompass a non-exclusive inclusion, such that a process, method, article, or device that comprises a plurality of elements includes not only those elements but also Other elements, or elements that are inherent to such a process, method, item, or device. An element that is defined by the phrase "comprising a ..." does not exclude the presence of additional equivalent elements in the process, method, item, or device that comprises the element.

The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments are obvious to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather The broadest scope consistent with the principles and novel features disclosed herein is consistent.

The above description is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It should be considered as the scope of protection of the present invention.

Claims (15)

A traffic warning method, characterized in that the method comprises: Obtaining, by the first user terminal or the network side device, the driving condition of the first user terminal; The network side device determines, according to the driving condition of the first user terminal, whether the driving condition of the first user terminal satisfies a traffic warning condition, and if yes, the network side device sends the early warning information to the first roadside unit; The first roadside unit determines a second user terminal that receives the early warning information based on the driving condition of the first user terminal, and sends the early warning information to the second user terminal, where the early warning information is used to trigger The second user terminal performs an operation corresponding to the early warning information. The method according to claim 1, wherein the network side device comprises a second roadside unit and a security server; The second roadside unit obtains the driving condition of the first user terminal, and determines whether the driving condition of the first user terminal satisfies the traffic warning condition based on the driving condition of the first user terminal, and if so, to the first The roadside unit sends the warning information; or The first user terminal or the second roadside unit obtains the driving condition of the first user terminal; The security server determines whether the driving condition of the first user terminal satisfies a traffic warning condition based on the driving condition of the first user terminal, and if yes, sends the early warning information to the first roadside unit. The method according to claim 1, wherein the first user terminal or the network side device obtains the driving situation of the first user terminal, including: The first user terminal or the network side device obtains a relative position of the first user terminal based on the currently obtained multiple received powers, and obtains, according to the currently obtained multiple received powers and the plurality of received powers obtained last time, The traveling direction of the first user terminal, wherein the received power is obtained by the first user terminal or the second roadside unit after receiving the probe message. The method according to claim 3, wherein the first user terminal or the network side device obtains the driving situation of the first user terminal, including: the first user terminal or network The side device obtains the driving parameter of the first user terminal, and obtains the driving state of the first user terminal based on the driving parameter. The method according to claim 3, wherein the first user terminal obtains a relative position of the first user terminal based on a plurality of currently received received powers, and is based on a plurality of currently received received powers and Obtaining a plurality of received powers at a time, obtaining a traveling direction of the first user terminal, including: Receiving, by the first user terminal, a probe message that is periodically broadcasted by multiple second roadside units; After receiving the respective probe messages, the first user terminal obtains the received power corresponding to each probe message; The first user terminal compares the currently obtained multiple received powers to obtain a relative position of the first user terminal; The first user terminal compares each received power currently obtained with the received power obtained by receiving the probe message broadcast by the same second roadside unit last time, to obtain the traveling direction of the first user terminal. The method according to claim 3, wherein the network side device obtains the relative position of the first user terminal based on the currently obtained multiple received powers, and based on the currently obtained multiple received powers and the last time Obtaining a plurality of received powers to obtain a traveling direction of the first user terminal, including: The second roadside unit receives the probe message periodically sent by the first user terminal; After receiving the probe message, the second roadside unit obtains the received power corresponding to the probe message; The second roadside unit transmits the obtained received power to the other second roadside unit, and receives the received power obtained by the other second roadside unit after receiving the probe message; The second roadside unit compares the currently obtained multiple received powers to obtain a relative position of the first user terminal, where the currently obtained multiple received powers include that the second roadside unit receives the probe message. The received power obtained afterwards and the received power obtained by the other second roadside unit after receiving the probe message; The second roadside unit compares each of the currently received received powers with the received power obtained by receiving the probe message broadcast by the same first user terminal, respectively, to obtain the traveling direction of the first user terminal. A traffic warning system, comprising: a first user terminal, a network side device, a first roadside unit, and a second user terminal; The first user terminal or the network side device is configured to obtain a driving situation of the first user terminal; The network side device is configured to determine, according to the driving condition of the first user terminal, whether the driving condition of the first user terminal satisfies a traffic warning condition, and if yes, send the early warning information to the first roadside unit; The first roadside unit is configured to determine, according to the driving condition of the first user terminal, a second user terminal that receives the early warning information, and send the early warning information to the second user terminal, where the early warning information And configured to trigger the second user terminal to perform an operation corresponding to the early warning information. The system according to claim 7, wherein the network side device comprises a second roadside unit and a security server; The second roadside unit is configured to obtain a driving condition of the first user terminal, and determine, according to the driving condition of the first user terminal, whether the driving condition of the first user terminal satisfies a traffic warning condition, and if so, Sending early warning information to the first roadside unit; wherein the sending the early warning information to the first roadside unit includes the second roadside unit directly transmitting the early warning information to the first roadside unit, or the second roadside unit passes The security server sends alert information to the first roadside unit. A system according to claim 7 or claim 8 wherein said first roadside unit is determined by a second roadside unit or security server in said traffic warning system. A traffic warning method, characterized in that the method comprises: Obtaining the driving condition of the first user terminal; Determining, according to the driving condition of the first user terminal, whether the driving condition of the first user terminal satisfies a traffic warning condition; When the driving condition of the first user terminal satisfies the traffic warning condition, the sending the warning information, where the warning information is used to trigger the second user terminal to perform an operation corresponding to the warning information, where the second user terminal is based on The driving condition of the first user terminal is obtained. The method according to claim 10, wherein the obtaining the driving situation of the first user terminal comprises: obtaining a relative position of the first user terminal based on the currently obtained plurality of received powers, and based on the current The plurality of received powers and the plurality of received powers obtained last time obtain the traveling direction of the first user terminal. The method according to claim 11, wherein the obtaining the driving condition of the first user terminal comprises: obtaining a driving parameter of the first user terminal, and obtaining the first user terminal based on the driving parameter Driving status. The method according to claim 12, wherein the relative position of the first user terminal is obtained based on a plurality of currently received received powers, and based on the plurality of currently received received powers and the last time obtained Receiving power, obtaining the traveling direction of the first user terminal, including: Obtaining a probe message periodically sent by the first user terminal; After receiving the probe message, obtaining the received power corresponding to the probe message; Transmitting the received power to the other second roadside unit, and receiving the received power obtained by the other second roadside unit after receiving the probe message; Comparing the currently obtained multiple received powers to obtain a relative position of the first user terminal, where the currently obtained multiple received powers include received power obtained by the second roadside unit after receiving the probe message, and other The received power obtained by the second roadside unit after receiving the probe message; Each of the currently received received powers is compared with the received power obtained by receiving the probe message broadcast by the same first user terminal, respectively, to obtain the traveling direction of the first user terminal. The method according to claim 13, wherein the relative position of the first user terminal is obtained based on a plurality of currently received received powers, and based on the plurality of currently received received powers and the last time obtained Receiving power, obtaining the traveling direction of the first user terminal, include: Acquiring the received power uploaded by the first user terminal, where the received power is obtained by the first user terminal after receiving the probe message periodically broadcasted by the second roadside unit; Comparing the currently obtained multiple received powers to obtain a relative position of the first user terminal; Each of the currently received received powers is compared with the received power obtained by receiving the probe message broadcast by the same second roadside unit last time, to obtain the traveling direction of the first user terminal. A traffic warning device, characterized in that the device comprises: a obtaining unit, configured to obtain a driving condition of the first user terminal; a determining unit, configured to determine, according to the driving condition of the first user terminal, whether the driving condition of the first user terminal meets a traffic warning condition; a sending unit, configured to send, when the driving condition of the first user terminal meets the traffic warning condition, the warning information, where the warning information is used to trigger the second user terminal to perform an operation corresponding to the warning information, The second user terminal is derived based on the driving condition of the first user terminal.

Images