CN105139691A - Traffic early warning method, apparatus, and system - Google Patents

Traffic early warning method, apparatus, and system Download PDF

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Publication number
CN105139691A
CN105139691A CN201510641533.2A CN201510641533A CN105139691A CN 105139691 A CN105139691 A CN 105139691A CN 201510641533 A CN201510641533 A CN 201510641533A CN 105139691 A CN105139691 A CN 105139691A
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China
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user terminal
early warning
received power
travel
travel situations
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CN201510641533.2A
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Chinese (zh)
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CN105139691B (en
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张晨璐
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宇龙计算机通信科技(深圳)有限公司
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Priority to CN201510641533.2A priority Critical patent/CN105139691B/en
Publication of CN105139691A publication Critical patent/CN105139691A/en
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Publication of CN105139691B publication Critical patent/CN105139691B/en

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    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/16Anti-collision systems

Abstract

The invention provides a traffic early warning method, apparatus, and system. Because a second user terminal can be obtained at least based on a driving situation of a first user terminal, when early warning information needs to be sent, the early warning information can be only sent to the second user terminal, so that other first user terminals can not receive the early warning information any longer; and thus other first user terminals not receiving the early warning information can execute corresponding operations, thereby reducing the probability of wrong operation execution by other first user terminals. In other words, according to the technical scheme, the early warning information can only be sent to the second user terminal, thereby reducing the probability of wrong operation execution by other first user terminals not warned early.

Description

A kind of traffic prewarning method, Apparatus and system

Technical field

The invention belongs to vehicle network technology field, in particular, particularly relate to a kind of traffic prewarning method, Apparatus and system.

Background technology

Vehicle network technology is following 5G (the 5th third-generation mobile communication technology) the network core technology that developed recently gets up, 3GPP (3rdGenerationPartnershipProject, third generation partner program) and a large amount of research work was expanded to vehicle network technology in 2015, and give the potential technology scene of vehicle network technology.The traffic information broadcasting system based on roadside unit is proposed in SA technical report TR22.885.As shown in Figure 1, under scene shown in Fig. 1, require UE (UserEquipment, user terminal) initiatively to RSU (RoadSideUnit, roadside unit) send the ability of early warning information, after RSU receives early warning information, send early warning broadcast to specific first user terminal.

As can be seen from Figure 1, early warning information broadcast is without the need to being broadcast to all UE, if figure is for the lateral vehicle A of intersection and vehicle B, if the early warning information that receives the UE on this two vehicles can cause vehicle A and vehicle B to perform the faulty operation that there is no need, therefore existing system needs the ability accurately identifying vehicle heading.

Summary of the invention

In view of this, the invention provides a kind of traffic prewarning method, Apparatus and system, for sending early warning information to some first user terminal targetedly, reducing the probability of other first user terminal execution errors operation.Technical scheme is as follows:

First aspect, the invention provides a kind of traffic prewarning method, described method comprises:

First user terminal or network equipment obtain the travel situations of described first user terminal;

Network equipment, based on the travel situations of described first user terminal, judges whether the travel situations of described first user terminal meets traffic prewarning condition, and if so, network equipment sends early warning information to first via edge element;

Described first via edge element determines based on the travel situations of described first user terminal the second user terminal receiving described early warning information, and sending described early warning information to described second user terminal, described early warning information performs the operation corresponding with described early warning information for triggering described second user terminal.

Preferably, described network equipment comprises the second roadside unit and security server;

Described second roadside unit obtains the travel situations of described first user terminal, based on the travel situations of described first user terminal, judge whether the travel situations of described first user terminal meets traffic prewarning condition, if so, send early warning information to first via edge element;

Or

Described first user terminal or the second roadside unit obtain the travel situations of described first user terminal;

Described security server, based on the travel situations of described first user terminal, judges whether the travel situations of described first user terminal meets traffic prewarning condition, if so, sends early warning information to first via edge element.

Preferably, described second roadside unit or security server determine described first via edge element based on the travel situations of described first user terminal.

Preferably, described first user terminal or network equipment obtain the travel situations of described first user terminal, comprising:

Described first user terminal or network equipment are based on the current multiple received powers obtained, obtain the relative position of described first user terminal, and based on the current multiple received power obtained and the last multiple received powers obtained, obtain the travel direction of described first user terminal, wherein said received power is obtained after receiving probe message by described first user terminal or the second roadside unit.

Preferably, described first user terminal or network equipment obtain the travel situations of described first user terminal, comprise: described first user terminal or network equipment obtain the driving parameters of described first user terminal, and obtain the transport condition of described first user terminal based on described driving parameters.

Preferably, described first user terminal, based on the current multiple received powers obtained, obtains the relative position of described first user terminal, and based on the current multiple received power obtained and the last multiple received powers obtained, obtain the travel direction of described first user terminal, comprising:

Described first user terminal receives the probe message that multiple second roadside unit periodic broadcast sends;

Described first user terminal, after receiving each probe message, obtains the received power that each probe message is corresponding;

The current multiple received powers obtained compare by described first user terminal, obtain the relative position of described first user terminal;

The received power that described first user terminal obtains the current each received power obtained is received respectively the probe message that same second roadside unit broadcasts with the last time after compares, and obtains the travel direction of described first user terminal.

Preferably, described network equipment, based on the current multiple received powers obtained, obtains the relative position of described first user terminal, and based on the current multiple received power obtained and the last multiple received powers obtained, obtain the travel direction of described first user terminal, comprising:

Second roadside unit receives the probe message that first user terminal periodic sends;

Described second roadside unit, after receiving probe message, obtains the received power that described probe message is corresponding;

The received power obtained is sent to other the second roadside units by described second roadside unit, and receives the received power that other second roadside units obtain after receiving probe message;

The current multiple received powers obtained compare by described second roadside unit, obtain the relative position of described first user terminal, wherein the current multiple received powers obtained comprise received power that described second roadside unit obtains after receiving probe message and the received power that other the second roadside units obtain after receiving probe message;

The received power that described second roadside unit obtains the current each received power obtained is received the probe message of same first user terminal broadcast respectively with the last time after compares, and obtains the travel direction of described first user terminal.

Second aspect, the invention provides a kind of traffic prewarning system, described system comprises: first user terminal, network equipment, first via edge element and by the second user terminal;

Described first user terminal or institute's network equipment, for obtaining the travel situations of described first user terminal;

Described network equipment, for the travel situations based on described first user terminal, judges whether the travel situations of described first user terminal meets traffic prewarning condition, if so, sends early warning information to first via edge element;

Described first via edge element, for determining based on the travel situations of described first user terminal the second user terminal receiving described early warning information, and sending described early warning information to described second user terminal, described early warning information performs the operation corresponding with described early warning information for triggering described second user terminal.

Preferably, described network equipment comprises the second roadside unit and security server;

Described second roadside unit is for obtaining the travel situations of described first user terminal, based on the travel situations of described first user terminal, judge whether the travel situations of described first user terminal meets traffic prewarning condition, if so, send early warning information to first via edge element; Wherein saidly send early warning information to first via edge element and comprise described second roadside unit and directly send early warning information to first via edge element, or described second roadside unit sends early warning information through described security server to described first via edge element.

Preferably, described network equipment comprises the second roadside unit and security server;

Described second roadside unit, for obtaining the travel situations of described first user terminal;

Described security server, for the form situation based on described first user terminal, judges whether the travel situations of described first user terminal meets traffic prewarning condition, if so, sends early warning information to first via edge element.

Preferably, described first via edge element is determined by the second roadside unit in described traffic prewarning system or security server.

The third aspect, the invention provides a kind of traffic prewarning method, described method comprises:

Obtain the travel situations of first user terminal;

Based on the travel situations of described first user terminal, judge whether the travel situations of described first user terminal meets traffic prewarning condition;

When the travel situations of described first user terminal meets described traffic prewarning condition, send early warning information, described early warning information performs the operation corresponding with described early warning information for triggering the second user terminal, and described second user terminal obtains based on the travel situations of described first user terminal.

Preferably, the travel situations of described acquisition first user terminal, comprise: based on the current multiple received powers obtained, obtain the relative position of described first user terminal, and based on the current multiple received power obtained and the last multiple received powers obtained, obtain the travel direction of described first user terminal.

Preferably, the travel situations of described acquisition first user terminal, comprising: the driving parameters obtaining described first user terminal, and the transport condition obtaining described first user terminal based on described driving parameters.

Preferably, describedly obtain the relative position of described first user terminal based on the current multiple received powers obtained, and based on the current multiple received power obtained and the last multiple received powers obtained, obtain the travel direction of described first user terminal, comprising:

Obtain the probe message that first user terminal periodic sends;

After receiving probe message, obtain the received power that described probe message is corresponding;

Described received power is sent to other second roadside units, and receives the received power that other second roadside units obtain after receiving probe message;

The current multiple received powers obtained are compared, obtain the relative position of described first user terminal, wherein the current multiple received powers obtained comprise received power that described second roadside unit obtains after receiving probe message and the received power that other the second roadside units obtain after receiving probe message;

The received power obtained the current each received power obtained is received the probe message of same first user terminal broadcast respectively with the last time after compares, and obtains the travel direction of described first user terminal.

Preferably, describedly obtain the relative position of described first user terminal based on the current multiple received powers obtained, and based on the current multiple received power obtained and the last multiple received powers obtained, obtain the travel direction of described first user terminal, comprising:

Obtain the received power that first user terminal is uploaded, described received power is obtained after the probe message receiving the second roadside unit periodic broadcast transmission by first user terminal;

The current multiple received powers obtained are compared, obtains the relative position of described first user terminal;

The received power obtained the current each received power obtained is received respectively the probe message that same second roadside unit broadcasts with the last time after compares, and obtains the travel direction of described first user terminal.

Fourth aspect, the invention provides a kind of traffic prewarning device, described device comprises:

Obtain unit, for obtaining the travel situations of first user terminal;

Judging unit, for the travel situations based on described first user terminal, judges whether the travel situations of described first user terminal meets traffic prewarning condition;

Transmitting element, for when the travel situations of described first user terminal meets described traffic prewarning condition, send early warning information, described early warning information performs the operation corresponding with described early warning information for triggering the second user terminal, and described second user terminal obtains based on the travel situations of described first user terminal.

Preferably, described acquisition unit, for based on the current multiple received powers obtained, obtains the relative position of described first user terminal, and based on the current multiple received power obtained and the last multiple received powers obtained, obtain the travel direction of described first user terminal.

Preferably, described acquisition unit, for obtaining the driving parameters of described first user terminal, and obtains the transport condition of described first user terminal based on described driving parameters.

Preferably, described acquisition unit comprises:

First obtains subelement, for obtaining the probe message that first user terminal periodic sends;

First computation subunit, for after receiving probe message, obtains the received power that described probe message is corresponding;

Radio frequency subelement, for described received power is sent to other the second roadside units, and receives the received power that other second roadside units obtain after receiving probe message;

Second computation subunit, for the current multiple received powers obtained are compared, obtain the relative position of described first user terminal, wherein the current multiple received powers obtained comprise received power that described second roadside unit obtains after receiving probe message and the received power that other the second roadside units send;

3rd computation subunit, compares for the received power obtained after the current each received power obtained is received the probe message of same first user terminal broadcast respectively with the last time, obtains the travel direction of described first user terminal.

Preferably, described acquisition unit comprises:

Second obtains subelement, and for obtaining the received power that first user terminal is uploaded, described received power is obtained after the probe message receiving the second roadside unit periodic broadcast transmission by first user terminal;

4th computation subunit, for the current multiple received powers obtained being compared, obtains the relative position of described first user terminal;

5th computation subunit, compares for the received power obtained after the current each received power obtained is received respectively probe message that same second roadside unit broadcasts with the last time, obtains the travel direction of described first user terminal.

Compared with prior art, technique scheme tool provided by the invention has the following advantages:

In technique scheme provided by the invention, at least can obtain the second user terminal based on the travel situations of first user terminal, like this when needs send early warning information, early warning information only can be sent to the second user terminal, other first user terminals are made no longer to receive early warning information, other first user terminals not receiving early warning information then can perform corresponding operation like this, reduce the probability of other first user terminal execution errors operation, that is technique scheme provided by the invention only can send early warning information to the second user terminal targetedly, to reduce the probability of other first user terminals (not by the first user terminal of early warning) execution error operation.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is the schematic diagram of the existing traffic information broadcasting system based on roadside unit;

Fig. 2 is a kind of process flow diagram of the traffic prewarning method that the embodiment of the present invention provides;

Fig. 3 is the schematic diagram of a kind of traffic scene that the embodiment of the present invention provides;

Fig. 4 is a kind of process flow diagram obtaining the travel situations of first user terminal in the traffic prewarning method that provides of the embodiment of the present invention;

Fig. 5 is the another kind of process flow diagram obtaining the travel situations of first user terminal in the traffic prewarning method that provides of the embodiment of the present invention;

Fig. 6 is the structural representation of the traffic prewarning system that the embodiment of the present invention provides;

Fig. 7 is the process flow diagram of the another kind of traffic prewarning method that the embodiment of the present invention provides;

Fig. 8 obtains the relative position of first user terminal and a kind of process flow diagram of travel direction in the method for traffic prewarning shown in Fig. 7;

Fig. 9 obtains the relative position of first user terminal and the another kind of process flow diagram of travel direction in the method for traffic prewarning shown in Fig. 7;

Figure 10 is the structural representation of the traffic prewarning device that the embodiment of the present invention provides.

Embodiment

For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

Refer to Fig. 2, it illustrates the Signalling exchange figure of the traffic prewarning method that the embodiment of the present invention provides, can comprise the following steps:

101: first user terminal UE or network equipment obtain the travel situations of first user terminal.Wherein network equipment can be RSU, the travel situations of first user terminal is used to indicate the situation that first user terminal place object travels on road, such as, indicate the travel direction of first user terminal place vehicle on road and transport condition (being in acceleration mode or deceleration regime).

In embodiments of the present invention, first user terminal or network equipment can based on the current multiple received powers obtained, obtain the relative position of first user terminal, and based on the current multiple received power obtained and the last multiple received powers obtained, obtain the travel direction of first user terminal, wherein received power is obtained after receiving probe message by first user terminal or network equipment.

That is in embodiments of the present invention, the relative position of first user terminal and travel direction can be obtained by first user terminal self, also can obtain by network equipment.Namely first user terminal can be divided into the active and terminal passive-type of terminal, for the first user terminal that terminal is active, first user terminal independently can obtain relative position and the travel direction of first user terminal, or for the active first user terminal of terminal, first user terminal independently can obtain receiving received power corresponding to probe message that network equipment sends, then the received power that first user terminal obtains is sent to network equipment, obtained relative position and the travel direction of first user terminal by network equipment.For the first user terminal of terminal passive-type, first user terminal periodically can send probe message to network equipment, is obtained relative position and the travel direction of first user terminal by network equipment.

Except relative position and travel direction, travel situations can also comprise other information, as transport condition, described transport condition is at least used to indicate first user terminal and is in acceleration mode or deceleration regime, and transport condition can obtain based on the driving parameters of first user terminal in embodiments of the present invention.Wherein driving parameters at least comprises: travel speed and acceleration, and described travel speed can be obtained by the speed pickup be arranged in first user terminal, and described acceleration then can be obtained by the acceleration transducer be arranged in first user terminal.Based on travel speed and acceleration, especially acceleration can judge that current first user terminal place object is in acceleration mode or deceleration regime.Certainly, except the transport condition that travel speed and acceleration obtain first user terminal, can also obtain based on the brake indication information of first user terminal place vehicle further, the concrete embodiment of the present invention is no longer set forth.

102: network equipment, based on the travel situations of first user terminal, judges whether the travel situations of first user terminal meets traffic prewarning condition, if so, network equipment sends early warning information to first via edge element.

Travel situations due to first user terminal is used to indicate the situation that first user terminal place object travels on road, so can judge whether to meet traffic prewarning condition based on the travel situations of first user terminal, namely judge whether first user terminal place object is being in illegal running.

Such as can obtain the positive whichaway of first user terminal place object based on the travel direction in travel situations and relative position to travel, so its object that likely can conflict with travel direction collides, and therefore can judge whether the travel situations of first user terminal meets traffic prewarning condition based on travel direction and relative position.Application scenarios as shown in Figure 1, the travel situations instruction pedestrian that the first user terminal that pedestrian wears obtains jaywalks, and transport information shows that pedestrian is illegal running a red light, vehicle like this through crossing, pedestrian place may collide with it, now then can judge that the travel situations of first user terminal meets traffic prewarning condition.

And in order to improve accuracy of judgement degree, the embodiment of the present invention is assessed first user terminal place object in conjunction with transport condition and how long is passed through crossing in travel direction and relative position, be in acceleration mode or deceleration regime, based on this, such network equipment then can judge whether that meeting traffic prewarning condition sends early warning information.Network equipment can also judge whether to meet traffic prewarning condition further combined with transport information, as after the travel situations obtaining first user terminal, traffic lights in conjunction with current crossing is that red light green light judges whether to meet traffic prewarning condition, if the relative position instruction vehicle of first user terminal place object or pedestrian are within the scope of crossing, be in acceleration mode to move to direction, crossing, and the traffic lights at crossing is red light at present, then illustrate that vehicle or pedestrian will make a dash across the red light to pass through, therefore now can judge to meet traffic prewarning condition, send early warning information and note the behavior of passing through in violation of rules and regulations to indicate other vehicles.

In embodiments of the present invention, network equipment at least comprises the second roadside unit and security server, the course of work of the second roadside unit and security server can have following several mode, and in actual application, it can select any one mode to perform:

A kind of mode is the travel situations that the second roadside unit obtains first user terminal, and judge whether the travel situations of first user terminal meets traffic prewarning condition, if the second roadside unit is based on the travel situations determination first via edge element of first user terminal, early warning information is sent to first via edge element;

Another kind of mode is: the second roadside unit obtains the travel situations of first user terminal, and judges whether the travel situations of first user terminal meets traffic prewarning condition, if so, the travel situations of described first user terminal is sent to security server.Early warning information based on the travel situations determination first via edge element of first user terminal, and is sent to first via edge element by security server;

Another mode is: the second roadside unit obtains the travel situations of first user terminal, judge whether the travel situations of first user terminal meets traffic prewarning condition, if the second roadside unit is based on the travel situations determination first via edge element of first user terminal, and early warning information is sent to first via edge element by triggering secure server;

Other modes are: the second roadside unit will obtain the travel situations information needed of first user terminal, as received power etc. sends to security server, the travel situations of first user terminal is obtained by security server, judge whether the travel situations of first user terminal meets traffic prewarning condition, if security server is based on the travel situations determination first via edge element of first user terminal, and early warning information is sent to first via edge element.

Above-mentioned first via edge element is the second roadside unit of the first user terminal transmission early warning information for having an accident with the vehicles or pedestrians of violation to other.In embodiments of the present invention, the mode obtaining first via edge element can be: the second roadside unit or security server obtain the second user terminal position according to the relative position of early warning user terminal, then obtain the second roadside unit belonging to the second user terminal based on the positional information of each the second roadside unit, namely the second roadside unit belonging to such second user terminal is first via edge element.Wherein early warning user terminal is the above-mentioned first user terminal meeting traffic prewarning condition, and the second roadside unit belonging to the second user terminal is then the second roadside unit that range of signal covers the second user terminal.

When the second roadside unit belonging to the second user terminal comprises multiple, can choose any one second roadside unit is first via edge element; Certainly also likely judge that the first via edge element needing the second roadside unit of transmission early warning information and needs to send early warning information to the second user terminal is same second roadside unit, in such cases, if obtain first via edge element by security server, then early warning information can be returned to the second roadside unit by security server, if obtain first via edge element by the second roadside unit, then can send early warning information by the second roadside unit directly to the second user terminal.

103: first via edge element determines based on the travel situations of first user terminal the second user terminal receiving early warning information, and sends early warning information to the second user terminal, early warning information performs the operation corresponding with early warning information for triggering the second user terminal.

In embodiments of the present invention, first via edge element can obtain the probable ranges of first user terminal based on relative position and travel direction, as being positioned at which crossing, and first via edge element can also based on travel speed and acceleration determination first user terminal place vehicle or pedestrian by time at crossing and speed, have that to travel the first user terminal of conflicting be then the second user terminal like this with first user terminal.As the second roadside unit in Fig. 1 detects that pedestrian exists illegal crossing behavior, then the first user terminal in vehicle D and vehicle E is the second user terminal.Now early warning information is sent to the second user terminal by first via edge element, and now the second user terminal then can send early warning alarm, and Stop and give way to make driver.Wherein early warning alarm can audible alarm, and vibrations are reported to the police or other any prompting modes.

From technique scheme, traffic prewarning method provided by the invention at least can obtain the second user terminal based on the travel situations of first user terminal, like this when needs send early warning information, early warning information only can be sent to the second user terminal, other first user terminals are made no longer to receive early warning information, other first user terminals not receiving early warning information then can perform corresponding operation like this, reduce the probability of other first user terminal execution errors operation, that is technique scheme provided by the invention only can send early warning information to the second user terminal targetedly, to reduce the probability of other first user terminals (not by the first user terminal of early warning) execution error operation.

Below with the schematic diagram of traffic scene shown in Fig. 3, the travel situations that above-mentioned first user terminal or network equipment obtain first user terminal based on received power is described.Figure 3 illustrates network equipment is four the second roadside units, is designated as RSU1, RSU2, RSU3 and RSU4 respectively.First user terminal is initiatively obtained to travel situations to illustrate, its process flow diagram as shown in Figure 4, can comprise the following steps:

201: first user terminal receives the probe message that multiple second roadside unit periodic broadcast sends.

202: first user terminal, after receiving each probe message, obtains the received power that each probe message is corresponding.Wherein received power can basis signal intensity be predicted, the mode of existing multiple basis signal prediction of strength received power, no longer sets forth this embodiment of the present invention in the prior art.

203: the current multiple received powers obtained compare by first user terminal, obtain the relative position of first user terminal.The method obtaining positional information is the signal difference between more multiple signal.Namely first user terminal obtains the relative position of first user terminal according to the difference of the multiple received powers obtained, for Fig. 3, first user terminal obtains the received power of the probe message that RSU1, RSU2, RSU3 and RSU4 send respectively: A1, A2, A3 and A4.

If through comparing discovery: A1>A2, illustrates that first user terminal is near RSU1 side, if the A1>A3 when A1>A2 and A1>A4, and much larger than A3 and A4, A2 and A1 then illustrates that first user terminal is near RSU1 and away from RSU3 and RSU4 side, therefore then can obtain the relative position of first user terminal after multiple received power being compared.Certainly the relative position of first user terminal can also be located based on emissive power and received power.

204: the received power that first user terminal obtains the current each received power obtained is received respectively the probe message that same second roadside unit broadcasts with the last time after compares, and obtains the travel direction of first user terminal.That is first user terminal is according to the variation tendency of probe message received power in repetitive measurement process meeting multiple RSU and send, and judges that UE is close or away from the position of each RSU, thus judges travel direction.And should be noted that a bit: when the variation tendency of the received power that the probe message sent multiple RSU obtains in repetitive measurement compares, is the comparison of the probe message sent by same second roadside unit.

Still for Fig. 3, the received power obtained in the T0 moment is respectively A1 ', A2 ', A3 ', A4 ', the received power A1 obtained with the T1 moment, A2, A3, A4 compare, work as A1 ' <A1, A2 ' <A2, A3 ' <A3 and A4 ' <A4, then can judge that first user terminal moves near RSU1 general orientation, and gradually near the direction of RSU3 and RSU4.Certainly, if find A1 ' >A1, A2 ' >A2 but A3 ' <A3, A4 ' <A4, then can illustrate that first user terminal is towards RSU3 and RSU4, but travel the position away from RSU1 and RSU2.The travel direction that first user terminal is general can be judged in this way, and first user terminal can be indicated to be sail to crossing or sailed out of crossing.

As shown in Figure 5, it illustrates when network equipment is the second roadside unit, the second roadside unit obtains the flow process of the travel situations of first user terminal, can comprise the following steps:

301: the second roadside units receive the probe message that first user terminal periodic sends.

302: the second roadside units, after receiving probe message, obtain the received power that probe message is corresponding.

Received power is sent to other second roadside units by 303: the second roadside units, and receive the received power that other second roadside units obtain after receiving probe message, such second roadside unit can obtain the received power of same first user terminal in different second roadside unit, makes the second roadside unit can compare to multiple received powers of same first user terminal the relative position and travel direction that obtain first user terminal.

The current multiple received powers obtained compare by 304: the second roadside units, obtain the relative position of first user terminal, wherein the current multiple received powers obtained comprise received power that the second roadside unit obtains after receiving probe message and the received power that other the second roadside units obtain after receiving probe message.

The received power that 305: the second roadside units obtain the current each received power obtained is received the probe message of same first user terminal broadcast respectively with the last time after compares, and obtains the travel direction of first user terminal.

In embodiments of the present invention, it is identical with step corresponding in process flow diagram shown in above-mentioned Fig. 4 with the mode of travel direction that the second roadside unit obtains relative position in travel situations, no longer sets forth this embodiment of the present invention.Certainly except above-mentioned received power, the embodiment of the present invention can also adopt the mistiming to obtain relative position and travel direction, wherein the mistiming is the transmitting time of same probe message and the difference of time of reception, the principle of received power can be adopted equally to draw relative position and travel direction by it, the embodiment of the present invention no longer describes in detail.

Corresponding with embodiment of the method shown in above-mentioned Fig. 1, the embodiment of the present invention also provides a kind of traffic prewarning system, as shown in Figure 6, can comprise: first user terminal 11, network equipment 12, first via edge element 13 and the second user terminal 14.

First user terminal 11 or network equipment 12, for obtaining the travel situations of first user terminal.Wherein the travel situations of first user terminal is used to indicate the situation that first user terminal place object travels on road, such as, indicate travel direction on road of first user terminal place vehicle and transport condition (being in acceleration mode or deceleration regime).

In embodiments of the present invention, first user terminal or network equipment can based on the current multiple received powers obtained, obtain the relative position of first user terminal, and based on the current multiple received power obtained and the last multiple received powers obtained, obtain the travel direction of first user terminal, wherein received power is obtained after receiving probe message by first user terminal or network equipment, specifically can consult process flow diagram shown in above-mentioned Fig. 4 and Fig. 5.

Except relative position and travel direction, travel situations can also comprise other information, as transport condition, described transport condition is at least used to indicate first user terminal and is in acceleration mode or deceleration regime, and transport condition can obtain based on the driving parameters of first user terminal in embodiments of the present invention.Wherein driving parameters at least comprises: travel speed and acceleration, and described travel speed can be obtained by the speed pickup be arranged in first user terminal, and described acceleration then can be obtained by the acceleration transducer be arranged in first user terminal.Based on travel speed and acceleration, especially acceleration can judge that current first user terminal place object is in acceleration mode or deceleration regime.Certainly, except the transport condition that travel speed and acceleration obtain first user terminal, can also obtain based on the brake indication information of first user terminal place vehicle further, the concrete embodiment of the present invention is no longer set forth.

Network equipment 12, for the travel situations based on first user terminal, judges whether the travel situations of first user terminal meets traffic prewarning condition, if so, sends early warning information to first via edge element.Travel situations due to first user terminal is used to indicate the situation that first user terminal place object travels on road, so can judge whether to meet traffic prewarning condition based on the travel situations of first user terminal, namely judge whether first user terminal place object is being in illegal running.

Such as can obtain the positive whichaway of first user terminal place object based on the travel direction in travel situations and relative position to travel, so its object that likely can conflict with travel direction collides, and therefore can judge whether the travel situations of first user terminal meets traffic prewarning condition based on travel direction and relative position.Application scenarios as shown in Figure 1, the travel situations instruction pedestrian that the first user terminal that pedestrian wears obtains jaywalks, and transport information shows that pedestrian is illegal running a red light, vehicle like this through crossing, pedestrian place may collide with it, now then can judge that the travel situations of first user terminal meets traffic prewarning condition.

And in order to improve accuracy of judgement degree, the embodiment of the present invention is assessed first user terminal place object in conjunction with transport condition and how long is passed through crossing in travel direction and relative position, be in acceleration mode or deceleration regime, based on this, such network equipment then can judge whether that meeting traffic prewarning condition sends early warning information.Network equipment can also judge whether to meet traffic prewarning condition further combined with transport information, as after the travel situations obtaining first user terminal, traffic lights in conjunction with current crossing is that red light green light judges whether to meet traffic prewarning condition, if the relative position instruction vehicle of first user terminal place object or pedestrian are within the scope of crossing, be in acceleration mode to move to direction, crossing, and the traffic lights at crossing is red light at present, then illustrate that vehicle or pedestrian will make a dash across the red light to pass through, therefore now can judge to meet traffic prewarning condition, send early warning information and note the behavior of passing through in violation of rules and regulations to indicate other vehicles.

In embodiments of the present invention, network equipment at least comprises the second roadside unit and security server, the course of work of the second roadside unit and security server can have following several mode, and in actual application, it can select any one mode to perform:

A kind of mode is the travel situations that the second roadside unit obtains first user terminal, and judge whether the travel situations of first user terminal meets traffic prewarning condition, if the second roadside unit is based on the travel situations determination first via edge element of first user terminal, early warning information is sent to first via edge element;

Another kind of mode is: the second roadside unit obtains the travel situations of first user terminal, and judges whether the travel situations of first user terminal meets traffic prewarning condition, if so, the travel situations of described first user terminal is sent to security server.Early warning information based on the travel situations determination first via edge element of first user terminal, and is sent to first via edge element by security server;

Another mode is: the second roadside unit obtains the travel situations of first user terminal, judge whether the travel situations of first user terminal meets traffic prewarning condition, if the second roadside unit is based on the travel situations determination first via edge element of first user terminal, and early warning information is sent to first via edge element by triggering secure server;

Other modes are: the second roadside unit will obtain the travel situations information needed of first user terminal, as received power etc. sends to security server, the travel situations of first user terminal is obtained by security server, judge whether the travel situations of first user terminal meets traffic prewarning condition, if security server is based on the travel situations determination first via edge element of first user terminal, and early warning information is sent to first via edge element.

Above-mentioned first via edge element is the second roadside unit of the first user terminal transmission early warning information for having an accident with the vehicles or pedestrians of violation to other.In embodiments of the present invention, the mode obtaining first via edge element can be: the second roadside unit or security server obtain the second user terminal position according to the relative position of early warning user terminal, then obtain the second roadside unit belonging to the second user terminal based on the positional information of each the second roadside unit, namely the second roadside unit belonging to such second user terminal is first via edge element.Wherein early warning user terminal is the above-mentioned first user terminal meeting traffic prewarning condition, and the second roadside unit belonging to the second user terminal is then the second roadside unit that range of signal covers the second user terminal.

When the second roadside unit belonging to the second user terminal comprises multiple, can choose any one second roadside unit is first via edge element; Certainly also likely judge that the first via edge element needing the second roadside unit of transmission early warning information and needs to send early warning information to the second user terminal is same second roadside unit, in such cases, if obtain first via edge element by security server, then early warning information can be returned to the second roadside unit by security server, if obtain first via edge element by the second roadside unit, then can send early warning information by the second roadside unit directly to the second user terminal.

First via edge element 13, for determining the second user terminal receiving early warning information based on the travel situations of first user terminal, and sends early warning information to the second user terminal, and early warning information performs the operation corresponding with early warning information for triggering the second user terminal.

In embodiments of the present invention, first via edge element can obtain the probable ranges of first user terminal based on relative position and travel direction, as being positioned at which crossing, and first via edge element can also based on travel speed and acceleration determination first user terminal place vehicle or pedestrian by time at crossing and speed, have that to travel the first user terminal of conflicting be then the second user terminal like this with first user terminal.As the second roadside unit in Fig. 1 detects that pedestrian exists illegal crossing behavior, then the first user terminal in vehicle D and vehicle E is the second user terminal.Now early warning information is sent to the second user terminal by first via edge element, and now the second user terminal then can send early warning alarm, and Stop and give way to make driver.Wherein early warning alarm can audible alarm, and vibrations are reported to the police or other any prompting modes.

From technique scheme, traffic prewarning system provided by the invention at least can obtain the second user terminal based on the travel situations of first user terminal, like this when needs send early warning information, early warning information only can be sent to the second user terminal, other first user terminals are made no longer to receive early warning information, other first user terminals not receiving early warning information then can perform corresponding operation like this, reduce the probability of other first user terminal execution errors operation, that is technique scheme provided by the invention only can send early warning information to the second user terminal targetedly, to reduce the probability of other first user terminals (not by the first user terminal of early warning) execution error operation.

Refer to Fig. 7, it illustrates the process flow diagram of the another kind of traffic prewarning method that the embodiment of the present invention provides, can comprise the following steps:

701: the travel situations obtaining first user terminal.Wherein the travel situations of first user terminal is used to indicate the situation that first user terminal place object travels on road, such as, indicate travel direction on road of first user terminal place vehicle and transport condition (being in acceleration mode or deceleration regime).

In embodiments of the present invention, first user terminal or network equipment can based on the current multiple received powers obtained, obtain the relative position of first user terminal, and based on the current multiple received power obtained and the last multiple received powers obtained, obtain the travel direction of first user terminal, wherein received power is obtained after receiving probe message by first user terminal or network equipment.

That is in embodiments of the present invention, the relative position of first user terminal and travel direction can be obtained by first user terminal self, also can obtain by network equipment.Namely first user terminal can be divided into the active and terminal passive-type of terminal, for the first user terminal that terminal is active, first user terminal independently can obtain relative position and the travel direction of first user terminal, and relative position and travel direction are sent to network equipment, or for the active first user terminal of terminal, first user terminal independently can obtain receiving received power corresponding to probe message that network equipment sends, then the received power that first user terminal obtains is sent to network equipment, relative position and the travel direction of first user terminal is obtained by network equipment.For the first user terminal of terminal passive-type, first user terminal periodically can send probe message to network equipment, is obtained relative position and the travel direction of first user terminal by network equipment.

Except relative position and travel direction, travel situations can also comprise other information, as transport condition, described transport condition is at least used to indicate first user terminal and is in acceleration mode or deceleration regime, and transport condition can obtain based on the driving parameters of first user terminal in embodiments of the present invention.Wherein driving parameters at least comprises: travel speed and acceleration, and described travel speed can be obtained by the speed pickup be arranged in first user terminal, and described acceleration then can be obtained by the acceleration transducer be arranged in first user terminal.Based on travel speed and acceleration, especially acceleration can judge that current first user terminal place object is in acceleration mode or deceleration regime.Certainly, except the transport condition that travel speed and acceleration obtain first user terminal, can also obtain based on the brake indication information of first user terminal place vehicle further, the concrete embodiment of the present invention is no longer set forth.

702: based on the travel situations of first user terminal, judge whether the travel situations of first user terminal meets traffic prewarning condition.

703: when the travel situations of first user terminal meets traffic prewarning condition, send early warning information.Wherein early warning information performs the operation corresponding with early warning information for triggering the second user terminal, is obtained by the travel situations of early warning information first user terminal based on first user terminal.

Travel situations due to first user terminal is used to indicate the situation that first user terminal place object travels on road, so can judge whether to meet traffic prewarning condition based on the travel situations of first user terminal, namely judge whether first user terminal place object is being in illegal running.

Such as can obtain the positive whichaway of first user terminal place object based on the travel direction in travel situations and relative position to travel, so its object that likely can conflict with travel direction collides, and therefore can judge whether the travel situations of first user terminal meets traffic prewarning condition based on travel direction and relative position.Application scenarios as shown in Figure 1, the travel situations instruction pedestrian that the first user terminal that pedestrian wears obtains jaywalks, and transport information shows that pedestrian is illegal running a red light, vehicle like this through crossing, pedestrian place may collide with it, now then can judge that the travel situations of first user terminal meets traffic prewarning condition.

And in order to improve accuracy of judgement degree, the embodiment of the present invention is assessed first user terminal place object in conjunction with transport condition and how long is passed through crossing in travel direction and relative position, be in acceleration mode or deceleration regime, based on this, such network equipment then can judge whether that meeting traffic prewarning condition sends early warning information.Network equipment can also judge whether to meet traffic prewarning condition further combined with transport information, as after the travel situations obtaining first user terminal, traffic lights in conjunction with current crossing is that red light green light judges whether to meet traffic prewarning condition, if the relative position instruction vehicle of first user terminal place object or pedestrian are within the scope of crossing, be in acceleration mode to move to direction, crossing, and the traffic lights at crossing is red light at present, then illustrate that vehicle or pedestrian will make a dash across the red light to pass through, therefore now can judge to meet traffic prewarning condition, send early warning information and note the behavior of passing through in violation of rules and regulations to indicate other vehicles.

In embodiments of the present invention, network equipment at least comprises the second roadside unit and security server, the course of work of the second roadside unit and security server can have following several mode, and in actual application, it can select any one mode to perform:

A kind of mode is the travel situations that the second roadside unit obtains first user terminal, and judge whether the travel situations of first user terminal meets traffic prewarning condition, if the second roadside unit is based on the travel situations determination first via edge element of first user terminal, early warning information is sent to first via edge element;

Another kind of mode is: the second roadside unit obtains the travel situations of first user terminal, and judges whether the travel situations of first user terminal meets traffic prewarning condition, if so, the travel situations of described first user terminal is sent to security server.Early warning information based on the travel situations determination first via edge element of first user terminal, and is sent to first via edge element by security server;

Another mode is: the second roadside unit obtains the travel situations of first user terminal, judge whether the travel situations of first user terminal meets traffic prewarning condition, if the second roadside unit is based on the travel situations determination first via edge element of first user terminal, and early warning information is sent to first via edge element by triggering secure server;

Other modes are: the second roadside unit will obtain the travel situations information needed of first user terminal, as received power etc. sends to security server, the travel situations of first user terminal is obtained by security server, judge whether the travel situations of first user terminal meets traffic prewarning condition, if security server is based on the travel situations determination first via edge element of first user terminal, and early warning information is sent to first via edge element.

Above-mentioned first via edge element is the second roadside unit of the first user terminal transmission early warning information for having an accident with the vehicles or pedestrians of violation to other.In embodiments of the present invention, the mode obtaining first via edge element can be: the second roadside unit or security server obtain the second user terminal position according to the relative position of early warning user terminal, then obtain the second roadside unit belonging to the second user terminal based on the positional information of each the second roadside unit, namely the second roadside unit belonging to such second user terminal is first via edge element.Wherein early warning user terminal is the above-mentioned first user terminal meeting traffic prewarning condition, and the second roadside unit belonging to the second user terminal is then the second roadside unit that range of signal covers the second user terminal.

When the second roadside unit belonging to the second user terminal comprises multiple, can choose any one second roadside unit is first via edge element; Certainly also likely judge that the first via edge element needing the second roadside unit of transmission early warning information and needs to send early warning information to the second user terminal is same second roadside unit, in such cases, if obtain first via edge element by security server, then early warning information can be returned to the second roadside unit by security server, if obtain first via edge element by the second roadside unit, then can send early warning information by the second roadside unit directly to the second user terminal.

In embodiments of the present invention, first via edge element can obtain the probable ranges of first user terminal based on relative position and travel direction, as being positioned at which crossing, and first via edge element can also based on travel speed and acceleration determination first user terminal place vehicle or pedestrian by time at crossing and speed, have that to travel the first user terminal of conflicting be then the second user terminal like this with first user terminal.As the second roadside unit in Fig. 1 detects that pedestrian exists illegal crossing behavior, then the first user terminal in vehicle D and vehicle E is the second user terminal.Now early warning information is sent to the second user terminal by first via edge element, and now the second user terminal then can send early warning alarm, and Stop and give way to make driver.Wherein early warning alarm can audible alarm, and vibrations are reported to the police or other any prompting modes.

From technique scheme, traffic prewarning method provided by the invention at least can obtain the second user terminal based on the travel situations of first user terminal, like this when needs send early warning information, early warning information only can be sent to the second user terminal, other first user terminals are made no longer to receive early warning information, other first user terminals not receiving early warning information then can perform corresponding operation like this, reduce the probability of other first user terminal execution errors operation, that is technique scheme provided by the invention only can send early warning information to the second user terminal targetedly, to reduce the probability of other first user terminals (not by the first user terminal of early warning) execution error operation.

In embodiments of the present invention, the mode obtaining above-mentioned relative position and travel direction can include but not limited to process flow diagram shown in following Fig. 8 Fig. 9.Wherein Fig. 8 shows in the embodiment of the present invention a kind of mode obtaining above-mentioned relative position and travel direction, can comprise the following steps:

801: obtain the probe message that first user terminal periodic sends.

802: after receiving probe message, obtain the received power that probe message is corresponding.Wherein received power can basis signal intensity be predicted, the mode of existing multiple basis signal prediction of strength received power, no longer sets forth this embodiment of the present invention in the prior art.

803: received power is sent to other the second roadside units, and receive the received power that other second roadside units are receiving probe message and obtain well, such second roadside unit can obtain the received power of same first user terminal in different second roadside unit, makes the second roadside unit can compare to multiple received powers of same first user terminal the relative position and travel direction that obtain first user terminal.

804: the current multiple received powers obtained are compared, obtain the relative position of first user terminal, wherein the current multiple received powers obtained comprise received power that the second roadside unit obtains after receiving probe message and the received power that other the second roadside units obtain after receiving probe message.

805: the received power obtained the current each received power obtained is received the probe message of same first user terminal broadcast respectively with the last time after compares, and obtains the travel direction of first user terminal.

In embodiments of the present invention, it is identical with step corresponding in process flow diagram shown in above-mentioned Fig. 4 with the mode of travel direction that the second roadside unit obtains relative position, no longer sets forth this embodiment of the present invention.

Refer to Fig. 9, it illustrates in the embodiment of the present invention the another kind of mode obtaining above-mentioned relative position and travel direction, can comprise the following steps:

901: obtain the received power that first user terminal is uploaded, received power is obtained after the probe message receiving the second roadside unit periodic broadcast transmission by first user terminal.

902: the current multiple received powers obtained are compared, obtains the relative position of first user terminal.

903: the received power obtained the current each received power obtained is received respectively the probe message that same second roadside unit broadcasts with the last time after compares, and obtains the travel direction of first user terminal.

In embodiments of the present invention, it is identical with step corresponding in process flow diagram shown in above-mentioned Fig. 4 with the mode of travel direction that the second roadside unit obtains relative position, no longer sets forth this embodiment of the present invention.

Corresponding with embodiment of the method shown in above-mentioned Fig. 7, the embodiment of the present invention also provides a kind of traffic prewarning device, and its structural representation as shown in Figure 10, can comprise: obtain unit 20, judging unit 21 and transmitting element 22.

Obtain unit 20, for obtaining the travel situations of first user terminal.Wherein the travel situations of first user terminal is used to indicate the situation that first user terminal place object travels on road, such as, indicate travel direction on road of first user terminal place vehicle and transport condition (being in acceleration mode or deceleration regime).

In embodiments of the present invention, obtaining unit can based on the current multiple received power obtained, obtain the relative position of first user terminal, and based on the current multiple received power obtained and the last multiple received powers obtained, obtain the travel direction of first user terminal, wherein received power is obtained after receiving probe message by first user terminal or network equipment.

Except relative position and travel direction, travel situations can also comprise other information, as transport condition, described transport condition is at least used to indicate first user terminal and is in acceleration mode or deceleration regime, and transport condition can obtain based on the driving parameters of first user terminal in embodiments of the present invention.Wherein driving parameters at least comprises: travel speed and acceleration, and described travel speed can be obtained by the speed pickup be arranged in first user terminal, and described acceleration then can be obtained by the acceleration transducer be arranged in first user terminal.Based on travel speed and acceleration, especially acceleration can judge that current first user terminal place object is in acceleration mode or deceleration regime.Certainly, except the transport condition that travel speed and acceleration obtain first user terminal, can also obtain based on the brake indication information of first user terminal place vehicle further, the concrete embodiment of the present invention is no longer set forth.

Judging unit 21, for the travel situations based on first user terminal, judges whether the travel situations of first user terminal meets traffic prewarning condition.Travel situations due to first user terminal is used to indicate the situation that first user terminal place object travels on road, so can judge whether to meet traffic prewarning condition based on the travel situations of first user terminal, namely judge whether first user terminal place object is being in illegal running, concrete deterministic process can consult the related description in said method embodiment, no longer sets forth this embodiment of the present invention.

Transmitting element 22, for when the travel situations of first user terminal meets traffic prewarning condition, send early warning information, early warning information performs the operation corresponding with early warning information for triggering the second user terminal, and the second user terminal obtains based on the travel situations of first user terminal.

The probable ranges of first user terminal is such as obtained based on relative position and travel direction, as being positioned at which crossing, and based on travel speed and acceleration determination first user terminal place vehicle or pedestrian by time at crossing and speed, have that to travel the first user terminal of conflicting be then the second user terminal like this with first user terminal.As the second roadside unit in Fig. 1 detects that pedestrian exists illegal crossing behavior, then the first user terminal in vehicle D and vehicle E is the second user terminal.Now early warning information is sent to the second user terminal by first via edge element, and now the second user terminal then can send early warning alarm, and Stop and give way to make driver.Wherein early warning alarm can audible alarm, and vibrations are reported to the police or other any prompting modes.

From technique scheme, traffic prewarning device provided by the invention at least can obtain the second user terminal based on the travel situations of first user terminal, like this when needs send early warning information, early warning information only can be sent to the second user terminal, other first user terminals are made no longer to receive early warning information, other first user terminals not receiving early warning information then can perform corresponding operation like this, reduce the probability of other first user terminal execution errors operation, that is technique scheme provided by the invention only can send early warning information to the second user terminal targetedly, to reduce the probability of other first user terminals (not by the first user terminal of early warning) execution error operation.

Obtain unit 20 in embodiments of the present invention can comprise: first obtains subelement, the first computation subunit, radio frequency subelement, the second computation subunit and the 3rd computation subunit.Wherein

First obtains subelement, for obtaining the probe message that first user terminal periodic sends.

First computation subunit, for after receiving probe message, obtains the received power that probe message is corresponding.Wherein received power can basis signal intensity be predicted, the mode of existing multiple basis signal prediction of strength received power, no longer sets forth this embodiment of the present invention in the prior art.

Radio frequency subelement, for received power being sent to other the second roadside units, and receive the received power that other second roadside units obtain after receiving probe message, such second roadside unit can obtain the received power of same first user terminal in different second roadside unit, makes the second roadside unit can compare to multiple received powers of same first user terminal the relative position and travel direction that obtain first user terminal.

Second computation subunit, for the current multiple received powers obtained are compared, obtain the relative position of first user terminal, wherein the current multiple received powers obtained comprise received power that the second roadside unit obtains after receiving probe message and the received power that other the second roadside units obtain after receiving probe message.

3rd computation subunit, compares for the received power obtained after the current each received power obtained is received the probe message of same first user terminal broadcast respectively with the last time, obtains the travel direction of first user terminal.

In embodiments of the present invention, it is identical with step corresponding in process flow diagram shown in above-mentioned Fig. 4 that the second computation subunit obtains the mode that relative position and the 3rd computation subunit obtain travel direction, no longer sets forth this embodiment of the present invention.

Or in embodiments of the present invention, above-mentioned acquisition unit 20 can comprise: second obtains subelement, the 4th computation subunit and the 5th computation subunit.

Second obtains subelement, and for obtaining the received power that first user terminal is uploaded, received power is obtained after the probe message receiving the second roadside unit periodic broadcast transmission by first user terminal.

4th computation subunit, for the current multiple received powers obtained being compared, obtains the relative position of first user terminal.

5th computation subunit, compares for the received power obtained after the current each received power obtained is received respectively probe message that same second roadside unit broadcasts with the last time, obtains the travel direction of first user terminal.

Need to illustrate a bit at this: in embodiments of the present invention, in above-described embodiment, each probe message can adopt the emissive power of making an appointment to send, can not carry in such probe message and send workers and peasants road.If do not appoint emissive power in advance, then need to carry emissive power in probe message.Wherein emissive power is used to indicate each power sending probe message and use, and when the emissive power in the probe message repeatedly received is identical, can directly the received power repeatedly received be compared; If when the emissive power in the probe message received is different, then comparing after needing to carry out respective handling to received power.For Fig. 3, the emissive power of RSU1 when T0 moment broadcast transmission probe message is 50dbm, the received power that first user terminal obtains is 24dbm, if the emissive power when T1 moment broadcast transmission probe message is 24bdm, the received power that first user terminal obtains is 14dbm, then, when not carrying emissive power in probe message, the travel direction of the first user terminal obtained is away from RSU1, and in fact really near RSU1, therefore need to carry emissive power in probe message.

In addition the probe message in above-described embodiment can adopt the message in D2Ddiscovery (terminal direct connection detection) technology, as D2Ddiscoverymessage (D2D probe message) or D2Dcommunicationmessage (D2D communication information), same first user terminal to the various information that the second roadside unit is uploaded also can carry with feedback message in upload, wherein feedback message also can adopt the message in D2Ddiscovery technology, as D2Ddiscoverymessage or D2Dcommunicationmessage.

And received power why can be adopted to be because consider that region, crossing is relative open to obtain relative position and travel direction, architectural environment is relatively simple, can suppose that within the scope of crossing, first user terminal all has view path to each RSU like this, the biggest factor namely affecting path loss is distance; Can suppose that namely shadow fading value is similar because buildings blocks the shadow fading difference strong correlation caused.Therefore, the received power of above-mentioned probe message can be used to obtain relative position and the travel direction of first user terminal, to realize the location to first user terminal, and this mode locates (GlobalPositioningSystem relative to GPS, GPS) technology is more simple, and positioning precision is not by the impact of the spacing of first user terminal.

It should be noted that, each embodiment in this instructions all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar part mutually see.For device class embodiment, due to itself and embodiment of the method basic simlarity, so description is fairly simple, relevant part illustrates see the part of embodiment of the method.

Finally, also it should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operational zone, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.

To the above-mentioned explanation of the disclosed embodiments, those skilled in the art are realized or uses the present invention.To be apparent for a person skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (15)

1. a traffic prewarning method, is characterized in that, described method comprises:
First user terminal or network equipment obtain the travel situations of described first user terminal;
Network equipment, based on the travel situations of described first user terminal, judges whether the travel situations of described first user terminal meets traffic prewarning condition, and if so, network equipment sends early warning information to first via edge element;
Described first via edge element determines based on the travel situations of described first user terminal the second user terminal receiving described early warning information, and sending described early warning information to described second user terminal, described early warning information performs the operation corresponding with described early warning information for triggering described second user terminal.
2. method according to claim 1, is characterized in that, described network equipment comprises the second roadside unit and security server;
Described second roadside unit obtains the travel situations of described first user terminal, based on the travel situations of described first user terminal, judge whether the travel situations of described first user terminal meets traffic prewarning condition, if so, send early warning information to first via edge element;
Or
Described first user terminal or the second roadside unit obtain the travel situations of described first user terminal;
Described security server, based on the travel situations of described first user terminal, judges whether the travel situations of described first user terminal meets traffic prewarning condition, if so, sends early warning information to first via edge element.
3. method according to claim 1, is characterized in that, described first user terminal or network equipment obtain the travel situations of described first user terminal, comprising:
Described first user terminal or network equipment are based on the current multiple received powers obtained, obtain the relative position of described first user terminal, and based on the current multiple received power obtained and the last multiple received powers obtained, obtain the travel direction of described first user terminal, wherein said received power is obtained after receiving probe message by described first user terminal or the second roadside unit.
4. method according to claim 3, it is characterized in that, described first user terminal or network equipment obtain the travel situations of described first user terminal, comprise: described first user terminal or network equipment obtain the driving parameters of described first user terminal, and obtain the transport condition of described first user terminal based on described driving parameters.
5. method according to claim 3, it is characterized in that, described first user terminal is based on the current multiple received powers obtained, obtain the relative position of described first user terminal, and based on the current multiple received power obtained and the last multiple received powers obtained, obtain the travel direction of described first user terminal, comprising:
Described first user terminal receives the probe message that multiple second roadside unit periodic broadcast sends;
Described first user terminal, after receiving each probe message, obtains the received power that each probe message is corresponding;
The current multiple received powers obtained compare by described first user terminal, obtain the relative position of described first user terminal;
The received power that described first user terminal obtains the current each received power obtained is received respectively the probe message that same second roadside unit broadcasts with the last time after compares, and obtains the travel direction of described first user terminal.
6. method according to claim 3, it is characterized in that, described network equipment is based on the current multiple received powers obtained, obtain the relative position of described first user terminal, and based on the current multiple received power obtained and the last multiple received powers obtained, obtain the travel direction of described first user terminal, comprising:
Second roadside unit receives the probe message that first user terminal periodic sends;
Described second roadside unit, after receiving probe message, obtains the received power that described probe message is corresponding;
The received power obtained is sent to other the second roadside units by described second roadside unit, and receives the received power that other second roadside units obtain after receiving probe message;
The current multiple received powers obtained compare by described second roadside unit, obtain the relative position of described first user terminal, wherein the current multiple received powers obtained comprise received power that described second roadside unit obtains after receiving probe message and the received power that other the second roadside units obtain after receiving probe message;
The received power that described second roadside unit obtains the current each received power obtained is received the probe message of same first user terminal broadcast respectively with the last time after compares, and obtains the travel direction of described first user terminal.
7. a traffic prewarning system, is characterized in that, comprising: first user terminal, network equipment, first via edge element and the second user terminal;
Described first user terminal or described network equipment, for obtaining the travel situations of described first user terminal;
Described network equipment, for the travel situations based on described first user terminal, judges whether the travel situations of described first user terminal meets traffic prewarning condition, if so, sends early warning information to first via edge element;
Described first via edge element, for determining based on the travel situations of described first user terminal the second user terminal receiving described early warning information, and sending described early warning information to described second user terminal, described early warning information performs the operation corresponding with described early warning information for triggering described second user terminal.
8. system according to claim 7, is characterized in that, described network equipment comprises the second roadside unit and security server;
Described second roadside unit is for obtaining the travel situations of described first user terminal, based on the travel situations of described first user terminal, judge whether the travel situations of described first user terminal meets traffic prewarning condition, if so, send early warning information to first via edge element; Wherein saidly send early warning information to first via edge element and comprise described second roadside unit and directly send early warning information to first via edge element, or described second roadside unit sends early warning information through described security server to described first via edge element.
9. the system according to claim 7 or 8, is characterized in that, described first via edge element is determined by the second roadside unit in described traffic prewarning system or security server.
10. a traffic prewarning method, is characterized in that, described method comprises:
Obtain the travel situations of first user terminal;
Based on the travel situations of described first user terminal, judge whether the travel situations of described first user terminal meets traffic prewarning condition;
When the travel situations of described first user terminal meets described traffic prewarning condition, send early warning information, described early warning information performs the operation corresponding with described early warning information for triggering the second user terminal, and described second user terminal obtains based on the travel situations of described first user terminal.
11. methods according to claim 10, it is characterized in that, the travel situations of described acquisition first user terminal, comprise: based on the current multiple received powers obtained, obtain the relative position of described first user terminal, and based on the current multiple received power obtained and the last multiple received powers obtained, obtain the travel direction of described first user terminal.
12. methods according to claim 11, is characterized in that, the travel situations of described acquisition first user terminal, comprising: the driving parameters obtaining described first user terminal, and the transport condition obtaining described first user terminal based on described driving parameters.
13. methods according to claim 12, it is characterized in that, described based on the current multiple received powers obtained, obtain the relative position of described first user terminal, and based on the current multiple received power obtained and the last multiple received powers obtained, obtain the travel direction of described first user terminal, comprising:
Obtain the probe message that first user terminal periodic sends;
After receiving probe message, obtain the received power that described probe message is corresponding;
Described received power is sent to other second roadside units, and receives the received power that other second roadside units obtain after receiving probe message;
The current multiple received powers obtained are compared, obtain the relative position of described first user terminal, wherein the current multiple received powers obtained comprise received power that described second roadside unit obtains after receiving probe message and the received power that other the second roadside units obtain after receiving probe message;
The received power obtained the current each received power obtained is received the probe message of same first user terminal broadcast respectively with the last time after compares, and obtains the travel direction of described first user terminal.
14. methods according to claim 13, it is characterized in that, described based on the current multiple received powers obtained, obtain the relative position of described first user terminal, and based on the current multiple received power obtained and the last multiple received powers obtained, obtain the travel direction of described first user terminal, comprising:
Obtain the received power that first user terminal is uploaded, described received power is obtained after the probe message receiving the second roadside unit periodic broadcast transmission by first user terminal;
The current multiple received powers obtained are compared, obtains the relative position of described first user terminal;
The received power obtained the current each received power obtained is received respectively the probe message that same second roadside unit broadcasts with the last time after compares, and obtains the travel direction of described first user terminal.
15. 1 kinds of traffic prewarning devices, is characterized in that, described device comprises:
Obtain unit, for obtaining the travel situations of first user terminal;
Judging unit, for the travel situations based on described first user terminal, judges whether the travel situations of described first user terminal meets traffic prewarning condition;
Transmitting element, for when the travel situations of described first user terminal meets described traffic prewarning condition, send early warning information, described early warning information performs the operation corresponding with described early warning information for triggering the second user terminal, and described second user terminal obtains based on the travel situations of described first user terminal.
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