WO2017054291A1

WO2017054291A1 - Traffic warning method, device and system

Info

Publication number: WO2017054291A1
Application number: PCT/CN2015/093543
Authority: WO
Inventors: 张晨璐
Original assignee: 宇龙计算机通信科技(深圳)有限公司
Priority date: 2015-09-30
Filing date: 2015-10-31
Publication date: 2017-04-06
Also published as: CN105096659B; CN105096659A

Abstract

A traffic warning method, device and system. A second user terminal is obtained on the basis of the driving direction 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. The warning information is sent only to the second user terminal in a targeted manner, so as to reduce the probability of the other first user terminal 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 user terminal sends an alert 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:

The first user terminal or the network side device obtains the running condition of the first user terminal based on the plurality of time differences currently obtained and the plurality of time differences obtained last time, wherein the time difference is the difference between the sending time and the receiving time of the probe message. Value

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.

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 parameter of the first user terminal, and obtains the driving state in the driving situation based on the driving parameter.

Preferably, the first user terminal obtains the driving situation of the first user terminal based on the plurality of time differences that are currently obtained and the plurality of time differences obtained last time, including:

The first user terminal receives a detection message that is periodically sent by a plurality of second roadside units, where the detection message carries a transmission time that the second roadside unit broadcasts the detection message;

After receiving the respective probe messages, the first user terminal obtains the receiving time corresponding to each probe message, and performs a difference calculation between each receiving time and the corresponding sending time to obtain a time difference corresponding to each receiving time;

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

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

Preferably, the network side device obtains the driving situation of the first user terminal based on the plurality of time differences obtained and the plurality of time differences obtained last time, including:

The second roadside unit receives the probe message periodically sent by the first user terminal, where the probe message carries the sending time of the first user terminal to broadcast and send the probe message;

After receiving the probe message, the second roadside unit obtains a receiving time corresponding to the probe message;

The second roadside unit calculates a difference between the receiving time and the sending time to obtain a time difference, sends the time difference to other second roadside units, and receives other second roadside units to receive the detecting message. Time difference obtained afterwards;

The second roadside unit compares the plurality of time differences currently obtained to obtain a relative position of the first user terminal, where the currently obtained multiple time differences include the second roadside unit receiving the probe message. Time difference and the time difference obtained by other second roadside units after receiving the probe message;

The second roadside unit compares each time difference currently obtained with a time difference obtained after receiving the probe message broadcast by the same first user terminal, respectively, to obtain a traveling direction of the first user terminal.

In a second aspect, the present invention provides a traffic warning system, including: a first user terminal, a network side device, 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 based on a plurality of time differences currently obtained and a plurality of time differences obtained last time, where the time difference is a probe message The difference between the sending time and the receiving time;

The network side device is configured to determine, according to the driving condition of the first user terminal, the first Whether the driving condition of a user terminal satisfies the traffic warning condition, if the warning information is sent 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 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 warning information to the first roadside unit;

or

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 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.

Preferably, the first roadside unit is determined by the security server or the second roadside unit.

Preferably, the first user terminal or the network side device is configured to obtain a driving parameter of the first user terminal, and obtain a driving state in the driving situation based on the driving parameter.

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

Obtaining a plurality of time differences currently obtained, wherein each time difference is a difference between a receiving time and a sending time of the same probe message;

Obtaining a driving condition of the first user terminal based on the plurality of time differences currently obtained and the plurality of time differences obtained last time;

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

Preferably, the obtaining the plurality of time differences currently obtained includes:

Obtaining a probe message periodically sent by the first user terminal, where the probe message carries a sending time that the first user terminal broadcasts and sends the probe message;

After receiving the probe message, obtaining a receiving time corresponding to the probe message;

Calculating a difference between the receiving time and the sending time to obtain a time difference, transmitting the time difference to other second roadside units, and receiving a time difference sent by the other second roadside unit;

or

The obtaining the plurality of time differences that are currently obtained includes: obtaining a plurality of time differences uploaded by the first user terminal, where the time difference is obtained by the first user terminal after receiving the probe message periodically broadcasted by the second roadside unit.

Preferably, the obtaining, according to the multiple time differences currently obtained and the multiple time differences obtained last time, the driving situation of the first user terminal, including:

Comparing the plurality of time differences currently obtained to obtain a relative position of the first user terminal;

Comparing each time difference currently obtained with the time difference obtained after receiving the same probe message last time, the traveling direction of the first user terminal is obtained.

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

Obtaining a unit, configured to obtain a plurality of time differences currently obtained, where each time difference is a difference between a receiving time and a sending time of the same probe message;

a calculating unit, configured to obtain a driving situation of the first user terminal based on the plurality of time differences currently obtained and the plurality of time differences obtained last time;

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 calculation unit is configured to obtain a driving parameter of the first user terminal, and obtain a driving state in the driving situation based on the driving parameter.

Preferably, the obtaining unit is configured to obtain a detection message periodically sent by the first user terminal, and after receiving the detection message, obtain a receiving time corresponding to the detection message, and perform the receiving time and the sending time. The difference is calculated to obtain a time difference, and the time difference is sent to the other second roadside unit, and the time difference sent by the other second roadside unit is received; wherein the detection message carries the first user terminal to broadcast and send the detection The time at which the message was sent;

or

The obtaining unit is configured to obtain a plurality of time differences uploaded by the first user terminal, where the time difference is obtained by the first user terminal after receiving the probe message periodically broadcasted by the second roadside unit.

Preferably, the calculating unit is configured to compare the currently obtained multiple time differences to obtain a relative position of the first user terminal, and to obtain each time difference currently obtained separately from the previous one received the same probe message. The time difference is compared to obtain the direction of travel 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;

FIG. 8 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:

The first user terminal UE or the network side device obtains the driving condition of the first user terminal based on the multiple time differences obtained at the current time and the multiple time differences obtained in the previous time, where the network side device may be an RSU, and the time difference is the sending of the probe message. The difference between time and reception time. The driving situation of the first user terminal is used to indicate the situation in which the object where the first user terminal is located is traveling on the road, for example, indicating the traveling direction and the traveling state (in the acceleration state or the deceleration state) of the vehicle where the first user terminal is located on the road.

In the embodiment of the present invention, the driving situation of the first user terminal includes at least a relative position of the first user terminal and a traveling direction of the first user terminal, wherein the relative position may be obtained by the first user terminal or the network side device based on the current The time difference is obtained, and the driving direction can be ended by the first user. The end or network side device is obtained based on the plurality of time differences currently obtained and the plurality of time differences obtained last time.

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. In the active first user terminal, the first user terminal can obtain the time difference corresponding to the detection message sent by the network side device, and then send the time difference obtained by the first user terminal to the network side device, which is obtained by the network side device. 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, the first user terminal can be obtained. In which direction the object is traveling, there is a possibility that the object colliding with the traveling direction collides, and therefore it is possible to determine whether the driving condition of the first user terminal satisfies the traffic warning condition based on the traveling direction and the relative position. 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, and judges the first Whether the driving condition of the user terminal satisfies the traffic warning condition, if the second roadside unit determines the first roadside unit based on the driving condition of the first user terminal, and triggers 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. 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 execute and 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 also be based on The driving speed and the acceleration determine the time and speed of the vehicle or pedestrian where the first user terminal is located, 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.

Moreover, the above technical solution provided by the present invention can obtain the relative position and the traveling direction of the first user terminal by using the time difference to realize the positioning of the first user terminal, and the method is relative to the GPS positioning (Global Positioning System). The technology is simpler, and the positioning accuracy is not affected by the distance between the first user terminals, thereby improving the positioning accuracy and reducing the probability of false triggering.

The following describes the driving situation of the first user terminal based on the time difference between the first user terminal or the network side device according to the traffic scenario diagram shown in FIG. 3 . 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 detection message that is sent by a plurality of second roadside units periodically, wherein the detection message carries a transmission time of the second roadside unit broadcast transmission detection message, where the transmission time indicates that the second roadside unit is When to send a probe message. In order to be able to accurately get based on the time difference The relative time and the direction of travel, the transmission time in the probe messages broadcast by the plurality of second roadside units needs to be synchronized. In the embodiment of the present invention, the sending time in the probe message broadcasted by the plurality of second roadside units may be an absolute time based on the same time source, such as a time that may be used by GPS positioning, or multiple second paths. The transmission time in the probe message broadcast by the side unit broadcast is the relative time after the clock synchronization processing is performed by each second roadside unit.

202: After receiving the respective probe messages, the first user terminal obtains the receiving time corresponding to each probe message, and performs a difference calculation between each receiving time and the corresponding sending time to obtain a time difference corresponding to each receiving time.

Taking FIG. 3 as an example, the receiving time of the probe message sent by the first user terminal by RSU1, RSU2, RSU3, and RSU4 is: R1, R2, R3, and R4, and the sending time is: S1, S2, S3, and S4, then the calculation is performed. The time difference should be: R _i -S _i , where S _i and R _i are the transmission time and reception time of RSU _i , respectively, and the corresponding time differences are: A1, A2, A3 and A4.

203: The first user terminal compares the currently obtained multiple time differences to obtain a relative position of the first user terminal. The method of obtaining position information is to compare the signal difference between a plurality of signals. In the embodiment of the present invention, the time difference can be used to reflect the time when the probe message is transmitted and the distance of the transmission, so the relative position of the first user terminal can be obtained by comparing a plurality of time differences. The above time differences are still as follows: A1, A2, A3, and A4 are examples.

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 multiple time differences.

204: The first user terminal compares each time difference currently obtained with a time difference obtained after receiving the probe message broadcast by the same second roadside unit last time, to obtain a traveling direction of the first user terminal. That is to say, the first user terminal determines the direction in which the UE approaches or moves away from each RSU according to the trend of the time difference in the multiple measurement process according to the probe message sent by the multiple RSUs, thereby determining the traveling direction. And it should be noted that when comparing the trend of the time difference obtained by the probe messages sent by multiple RSUs in multiple measurements, the same second roadside unit is sent. Time and reception time are compared.

Still taking Figure 3 as an example, the time difference obtained in the previous time is A1', A2', A3', A4', respectively, compared with the currently obtained time difference A1, A2, A3, A4, 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 A1'<A1, A2'<A2 but A3'>A3, A4'>A4 is found, it can be stated that the first user terminal is facing RSU3 and RSU4, but has traveled away from the location of RSU1 and RSU2, through this The method can determine the approximate driving direction of the first user terminal, and can indicate whether the first user terminal is coming to the intersection or has left the intersection.

As shown in FIG. 5, when the network side device is the second roadside unit, the second roadside unit obtains the relative position and the traveling direction of the first user terminal, and may include the following steps:

301: The second roadside unit receives the probe message periodically sent by the first user terminal, where the probe message carries the sending time of the first user terminal to broadcast the probe message.

302: After receiving the probe message, the second roadside unit obtains a receiving time corresponding to the probe message.

303: The second roadside unit calculates the difference between the receiving time and the sending time to obtain a time difference, sends the time difference to the other second roadside unit, and receives a time difference obtained by the other second roadside unit after receiving the detecting message, so that The second roadside unit can obtain the time difference of the same first user terminal in different second roadside units, so that the second roadside unit can compare the multiple time differences of the same first user terminal to obtain the first user terminal. Relative position and direction of travel.

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

305: The second roadside unit compares each time difference currently obtained with a time difference obtained after 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 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. 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 situation of the first user terminal based on the plurality of time differences obtained so far and the plurality of time differences obtained last time, wherein the time difference is the sending time and receiving of the probe message. The difference in time. The driving situation of the first user terminal is used to indicate the situation in which the object where the first user terminal is located is traveling on the road, for example, indicating the traveling direction and the traveling state (in the acceleration state or the deceleration state) of the vehicle where the first user terminal is located on the road.

In the embodiment of the present invention, the driving situation of the first user terminal includes at least a relative position of the first user terminal and a traveling direction of the first user terminal, wherein the relative position may be obtained by the first user terminal or the network side device based on the current The time difference is obtained, and the driving direction may be obtained by the first user terminal or the network side device based on the plurality of time differences currently obtained and the plurality of time differences obtained last time. For details, refer to the flowcharts shown in FIG. 4 and FIG. 5 above.

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 the warning information is sent to the first roadside unit. Since 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, it may be determined whether the traffic warning bar is satisfied based on the driving condition of the first user terminal. That is, it is determined whether the object where the first user terminal is located is 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.

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 is based on the driving situation of the first user terminal Determining the first roadside unit and transmitting 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 first roadside unit 13 is configured to determine, according to the driving condition of the first user terminal, the second user terminal that accepts 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 perform the early warning The operation corresponding to the information. In the embodiment of the present invention, the first roadside single The element may obtain an approximate range of the first user terminal based on the relative position and the driving direction, such as at which intersection, and the first roadside unit may also determine the time and time of the vehicle or pedestrian passing the intersection of the first user terminal based on the traveling speed and the acceleration. The speed, such 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.

Moreover, the above technical solution provided by the present invention can obtain the relative position and the traveling direction of the first user terminal by using the time difference to realize the positioning of the first user terminal, and the method is simpler and more positioning than the GPS positioning technology. The accuracy is not affected by the distance between the first user terminals, thereby improving the positioning accuracy and reducing the probability of false triggering.

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 plurality of time differences currently obtained, where each time difference is a difference between a receiving time and a sending time of the same probe message. In the embodiment of the present invention, the probe message may be periodically broadcasted by the second roadside unit, and the probe message carries a transmission time to indicate the time when the second roadside unit sends the probe message.

After receiving the probe message, the first user terminal obtains the receiving time corresponding to the probe message, Calculating the difference between the receiving time and the sending time gives a time difference, and then the first user terminal uploads the time difference to the second roadside unit.

The probe message may also be periodically broadcasted by the first user terminal, and the probe message carries a transmission time to indicate the time when the first user terminal sends the probe message. After receiving the probe message, the second roadside unit obtains the receiving time corresponding to the probe message; calculates the time difference by calculating the difference between the receiving time and the sending time, and sends the time difference to the other second roadside unit, and receives the other The time difference obtained by the second roadside unit after receiving the probe message, so that the second roadside unit can obtain the time difference of the same first user terminal in different second roadside units.

702: Obtain a running condition of the first user terminal based on the plurality of time differences currently obtained and the plurality of time differences obtained last time. In the embodiment of the present invention, 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 traveling direction and driving state of the vehicle where the first user terminal is located on the road (in acceleration) The state is still decelerating). The driving situation of the first user terminal includes at least a relative position of the first user terminal and a traveling direction of the first user terminal, and the relative position may be obtained by the first user terminal or the network side device based on the currently obtained multiple time differences, the traveling direction Then, the first user terminal or the network side device may be obtained based on the plurality of time differences that are currently obtained and the time difference obtained in the previous time. For details, refer to the flowcharts shown in FIG. 4 and FIG. 5, which are not described in the embodiment of the present invention.

703: Determine, according to the driving condition of the first user terminal, whether the driving condition of the first user terminal is Meet traffic warning conditions. 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.

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 above to meet the traffic warning The first user terminal of the condition, the second roadside unit to which the second user terminal belongs is the second roadside unit whose signal range covers the second user terminal.

704: When the driving condition of the first user terminal meets the traffic warning condition, sending the warning information, the warning information is used to trigger the second user terminal to perform an operation corresponding to the warning information, and the second user terminal is based on the driving situation of the first user terminal. get.

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.

And the above technical solution provided by the present invention can obtain the phase of the first user terminal by using the time difference. Position and driving direction to achieve positioning of the first user terminal, and this method is simpler than GPS positioning technology, and the positioning accuracy is not affected by the distance between the first user terminals, thereby improving positioning accuracy , reduce the chance of false triggers.

Corresponding to the method embodiment shown in FIG. 7 , the embodiment of the present invention further provides a traffic warning device. The structure of the device is as shown in FIG. 8 , and may include: an obtaining unit 20, a calculating unit 21, a determining unit 22, and a sending unit. twenty three.

The obtaining unit 20 is configured to obtain a plurality of time differences that are currently obtained, where each time difference is a difference between a receiving time and a sending time of the same probe message. In the embodiment of the present invention, the probe message may be periodically broadcasted by the second roadside unit, and the probe message carries a transmission time to indicate the time when the second roadside unit sends the probe message. After receiving the probe message, the first user terminal obtains the reception time corresponding to the probe message, and then calculates the difference between the reception time and the transmission time to obtain a time difference. The first user terminal uploads the time difference to the obtaining unit 20 of the second roadside unit.

The probe message may also be periodically broadcasted by the first user terminal, and the probe message carries a transmission time to indicate the time when the first user terminal sends the probe message. After receiving the probe message, the obtaining unit 20 obtains the receiving time corresponding to the probe message; calculates the difference between the receiving time and the sending time to obtain the time difference, sends the time difference to the other second roadside unit, and receives the other second road The time difference obtained by the edge unit after receiving the probe message, so that the obtaining unit 20 can obtain the time difference of the same first user terminal in different second roadside units.

The calculating unit 21 is configured to obtain a driving situation of the first user terminal based on the plurality of time differences currently obtained and the plurality of time differences obtained last time. In the embodiment of the present invention, the driving situation includes at least a relative position of the first user terminal and a traveling direction of the first user terminal, wherein the relative position is obtained by the calculating unit 21 based on the plurality of time differences currently obtained, and the driving direction may be obtained by the calculating unit. 21 is obtained based on the plurality of time differences currently obtained and the plurality of time differences obtained in the previous time. For details, refer to the flowchart shown in FIG. 5 above.

In addition to the relative position and direction of travel, the driving situation can also include other information, such as driving The driving state is at least used to indicate whether the first user terminal is in an acceleration state or a deceleration state. In the embodiment of the present invention, the driving state calculation unit 21 is obtained based on the driving parameter of the first user terminal. 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 22 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 of the foregoing method embodiment, which is not described in the embodiment of the present invention.

The sending unit 23 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, and the second user terminal is based on the first user terminal The driving situation is obtained. The second user terminal is a first user terminal that may have a driving conflict with the first user terminal. If the second roadside unit in FIG. 1 detects that the pedestrian has an illegal crossing behavior, the first of the vehicle D and the vehicle E The user terminal is a second user terminal. At this time, the second user terminal will issue an early warning alarm to stop the driver from leaving. The warning alarm can be an audible alarm, a vibration alarm or any other prompting method.

It should be noted here that the probe message in the above embodiment may use a message in a D2D discovery technology, such as a D2D discovery message or a D2D communication message, the same first. The various information uploaded by the user terminal to the second roadside unit may also be carried in the feedback message, and the feedback message may also adopt a message in the D2D discovery technology, such as a D2D discovery message or a D2D communication message.

The various embodiments in the present specification are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same similar parts between the various embodiments can be referred to each other. 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 is not to be limited to the embodiments shown herein, but the scope of the invention is to be accorded

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

A traffic warning method, characterized in that the method comprises:

The first user terminal or the network side device obtains the running condition of the first user terminal based on the plurality of time differences currently obtained and the plurality of time differences obtained last time, wherein the time difference is the difference between the sending time and the receiving time of the probe message. value;

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 a driving parameter of the first user terminal, and obtains a driving state in the driving situation based on the driving parameter.
The method according to claim 1, wherein the first user terminal obtains the driving situation of the first user terminal based on the plurality of time differences obtained so far and the plurality of time differences obtained last time, including:

Receiving, by the first user terminal, a detection message that is periodically broadcasted by multiple second roadside units, The detecting message carries a sending time that the second roadside unit broadcasts and sends the probe message;

After receiving the respective probe messages, the first user terminal obtains the receiving time corresponding to each probe message, and performs a difference calculation between each receiving time and the corresponding sending time to obtain a time difference corresponding to each receiving time;

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

The first user terminal compares each time difference currently obtained with a time difference obtained after receiving the probe message broadcast by the same second roadside unit last time, to obtain a traveling direction of the first user terminal.
The method according to claim 1, wherein the network side device obtains the driving condition of the first user terminal based on the plurality of time differences obtained and the plurality of time differences obtained last time, including:

The second roadside unit receives the probe message periodically sent by the first user terminal, where the probe message carries the sending time of the first user terminal to broadcast and send the probe message;

After receiving the probe message, the second roadside unit obtains a receiving time corresponding to the probe message;

The second roadside unit calculates a difference between the receiving time and the sending time to obtain a time difference, sends the time difference to other second roadside units, and receives other second roadside units to receive the detecting message. Time difference obtained afterwards;

The second roadside unit compares the plurality of time differences currently obtained to obtain a relative position of the first user terminal, where the currently obtained multiple time differences include the second roadside unit receiving the probe message. Time difference and the time difference obtained by other second roadside units after receiving the probe message;

The second roadside unit compares each time difference currently obtained with a time difference obtained after receiving the probe message broadcast by the same first user terminal, respectively, to obtain a traveling direction of the first user terminal.
A traffic warning system, comprising: a first user terminal, a network side device, 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 based on a plurality of time differences currently obtained and a plurality of time differences obtained last time, where the time difference is a probe message The difference between the sending time and the receiving time;

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 the first roadside unit sends the 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 6, 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 warning information to the first roadside unit;

or

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 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 system according to claim 6, wherein the first user terminal or the network side device is configured to obtain a driving parameter of the first user terminal, and obtain the driving condition based on the driving parameter. Driving status.
A traffic warning method, characterized in that the method comprises:

Obtaining a plurality of time differences currently obtained, wherein each time difference is a difference between a receiving time and a sending time of the same probe message;

Obtaining a driving condition of the first user terminal based on the plurality of time differences currently obtained and the plurality of time differences obtained last time;

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 9, wherein the method further comprises: obtaining a driving parameter of the first user terminal, and obtaining a driving state in the driving situation based on the driving parameter.
The method according to claim 9, wherein the obtaining the plurality of time differences currently obtained comprises:

Obtaining a probe message periodically sent by the first user terminal, where the probe message carries a sending time that the first user terminal broadcasts and sends the probe message;

After receiving the probe message, obtaining a receiving time corresponding to the probe message;

Calculating a difference between the receiving time and the sending time to obtain a time difference, transmitting the time difference to other second roadside units, and receiving a time difference sent by the other second roadside unit;

or

The obtaining the plurality of time differences that are currently obtained includes: obtaining a plurality of time differences uploaded by the first user terminal, where the time difference is obtained by the first user terminal after receiving the probe message periodically broadcasted by the second roadside unit.
The method according to claim 11, wherein the driving situation of the first user terminal is obtained based on the plurality of time differences obtained and the plurality of time differences obtained last time, including:

Comparing the plurality of time differences currently obtained to obtain a relative position of the first user terminal;

Comparing each time difference currently obtained with the time difference obtained after receiving the same probe message last time, the traveling direction of the first user terminal is obtained.
A traffic warning device, characterized in that the device comprises:

Obtaining a unit, configured to obtain a plurality of time differences currently obtained, where each time difference is a difference between a receiving time and a sending time of the same probe message;

a calculating unit, configured to obtain a driving situation of the first user terminal based on the plurality of time differences currently obtained and the plurality of time differences obtained last time;

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.
The device according to claim 13, wherein the calculation unit is configured to obtain a driving parameter of the first user terminal, and obtain a driving state in the driving situation based on the driving parameter.
The device according to claim 13, wherein the obtaining unit is configured to acquire a probe message periodically sent by the first user terminal, and after receiving the probe message, obtain a receiving time corresponding to the probe message, where Calculating a difference between the receiving time and the sending time to obtain a time difference, sending the time difference to another second roadside unit, and receiving a time difference sent by the other second roadside unit; wherein the detecting message carries Transmitting, by the first user terminal, a sending time of sending the probe message;

or

The obtaining unit is configured to obtain a plurality of time differences uploaded by the first user terminal, where the time difference is obtained by the first user terminal after receiving the probe message periodically broadcasted by the second roadside unit.
The device according to claim 15, wherein the calculating unit is configured to compare the plurality of time differences obtained so far, to obtain a relative position of the first user terminal, and to separately calculate each time difference currently obtained. Comparing with the time difference obtained after receiving the same probe message last time, the traveling direction of the first user terminal is obtained.