CN103208189A - Method and device for monitoring road traffic flow - Google Patents

Abstract

The embodiment of the present invention discloses a method and device for monitoring road traffic, which includes: obtaining the active set cell of at least one target communication device, the target communication device is a communication device located in a vehicle; the target anchor point of the target communication device, and use the target anchor point as the position of the target communication device in the road; the cell set of the target anchor point is the same as the active set cell of the target communication device The positioning point with the highest coincidence degree; monitoring the traffic of the road according to the position of the at least one target communication device on the road. Correspondingly, the embodiment of the present invention also provides a device for monitoring road flow. The embodiment of the present invention can realize flow monitoring of intelligent traffic with low cost and high accuracy.

Description

A method and device for monitoring road traffic

technical field

The invention relates to the field of intelligent transportation, in particular to a method and equipment for monitoring road flow.

Background technique

At present, the flow monitoring of intelligent transportation is mainly to monitor the flow of the road section through the camera deployed on the traffic line, or to estimate the flow of the road section through the on-board GPS device installed in the taxi. For the way of using camera monitoring, not only need to install a large number of monitoring equipment, but also need a large number of storage devices to store massive data, and the cost of use is high; for the flow monitoring of vehicle GPS, on the one hand, a third aspect of GPS data is required, and it is A sampling method, resulting in low accuracy of traffic monitoring.

To sum up, the current flow monitoring technology of intelligent transportation is costly and has low accuracy.

Contents of the invention

Embodiments of the present invention provide a method and equipment for monitoring road flow, which can realize intelligent traffic flow monitoring with low cost and high accuracy.

In a first aspect, an embodiment of the present invention provides a method for monitoring road traffic, including:

Acquiring an active set cell of at least one target communication device, where the target communication device is a communication device located in a vehicle;

Select the target positioning point of each target communication device from the positioning points of the road, and use the target positioning point as the position of the target communication device in the road; wherein, the target positioning point The positioning point with the highest coincidence degree between the cell set and the active set cell of the target communication device;

Traffic on the road is monitored based on the location of the at least one target communication device on the road.

In a first possible implementation manner, the target positioning point of each target communication device is selected from the positioning points of the road, and the target positioning point is used as the target positioning point of the target communication device on the road. Before the position at, the method also includes:

calculating coordinate values of a projection point on the road, where the projection point refers to a location point on the road in the shortest route from the pre-designated base station to the road;

Calculate the average coordinate value of the projection point of each road segment in the road, and use the position point of the average coordinate value as the anchor point of the road segment, and the average coordinate value is the average of the coordinate values of all the projection points of the road segment value;

The set of cells corresponding to all projection points of each road section is used as the set of cells of the road section positioning point, and the cell corresponding to the projection point refers to the cell that is included in the base station closest to the projection point and covers the projection point .

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner, the calculating the coordinate values of the projected points on the road includes:

calculating the coordinate values of the position points on the road in the shortest route from the pre-designated base station to the road;

Selecting from the pre-designated base stations a position point on the road in the shortest route from the base station meeting the preset condition to the road as the projection point of the road;

Wherein, the precondition is that the shortest distance from the base station to the road is greater than or equal to the maximum radiation radius of the base station.

With reference to the first possible implementation of the first aspect or the second possible implementation of the first aspect, in a third possible implementation, the set of cells corresponding to all projection points of each road section After the cell set as the location point of the road section, the method also includes:

Select a positioning communication device for each positioning point of the road within a preset period, and the positioning communication device refers to the communication device with the highest degree of coincidence between the cell set of the positioning point and the active set cell;

Select the target active set cell of the positioning point from the active set cells of the positioning communication equipment of each positioning point, and update the target active set cell to the cell set of the positioning point, and the target active set cell refers to the cell set of the positioning point The active set cell with the highest occurrence probability among all the active set cells of the positioning communication device of the positioning point.

With reference to the first aspect or the first possible implementation of the first aspect or the second possible implementation of the first aspect, in a fourth possible implementation, the acquiring the active set of at least one target communication device neighborhoods, including:

Acquiring active set cells at multiple time points of each target communication device;

The selecting the target positioning point of each target communication device from the positioning points of the road, and using the target positioning point as the position of the target communication device in the road includes:

Select the target positioning point of each target communication device at each of the time points from the positioning points of the road, and use the target positioning point as the target communication device at the time point in the road. s position;

The monitoring the traffic of the road according to the position of the at least one target communication device on the road includes:

Calculate the moving speed of the target section of the at least one target communication device in the road, and use the moving speed as the speed of the vehicle in the target section, and the target section is between the two target positioning points and/or

The number of vehicles in each section of the road is calculated according to the position of the at least one target communication device on the road.

With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner, the calculation of the moving speed of the target section of the at least one communication on the road is calculated, and the moving speed is used as The speed of the vehicle in the target section includes:

Selecting from the at least one target communication device a first communication device whose target anchor point is a continuous anchor point in the road;

Calculate the moving speed of the first communication device on the target road section of the road, and use the moving speed as the speed of the vehicle in the target road section.

In the second aspect, an embodiment of the present invention provides a device for monitoring road flow, including: an acquisition unit, a first selection unit, and a monitoring unit, wherein:

The acquiring unit is configured to acquire an active set cell of at least one target communication device, where the target communication device is a communication device located in a vehicle;

The first selection unit is configured to select the target positioning point of each target communication device from the positioning points of the road, and use the target positioning point as the position of the target communication device on the road ; Wherein, the cell set of the target positioning point is the positioning point with the highest coincidence degree with the active set cell of the target communication device;

The monitoring unit is configured to monitor the traffic of the road according to the position of the at least one target communication device on the road.

In a first possible implementation manner, the device further includes:

A first calculation unit, configured to calculate coordinate values of a projection point on the road, where the projection point refers to a location point on the road in the shortest route from the pre-designated base station to the road;

The second calculation unit is used to calculate the average coordinate value of the projection point of each road section in the road, and use the position point of the average coordinate value as the anchor point of the road section, and the average coordinate value of all the road sections The average value of the coordinate values of the projected points;

A determining unit, configured to use the set of cells corresponding to all projection points of each road section as the set of cells corresponding to the location point of the road section, the cell corresponding to the projection point refers to the base station that is closest to the projection point and covers all The cell of the above projection point.

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner, the first calculating unit is further configured to calculate the shortest route from the pre-designated base station to the road on the road. The coordinate value of the location point, and the location point on the road in the shortest route from the base station that meets the preset conditions selected from the pre-designated base station to the road as the projection point of the road;

Wherein, the precondition is that the shortest distance from the base station to the road is greater than or equal to the maximum radiation radius of the base station.

With reference to the first possible implementation of the second aspect or the second possible implementation of the second aspect, in a third possible implementation, the device further includes:

The second selection unit is configured to select a positioning communication device for each positioning point of the road within a preset period, and the positioning communication device refers to the communication device with the highest coincidence degree between the cell set of the positioning point and the active set cell ;

An updating unit, configured to select a target active set cell of the positioning point from the active set cells of the positioning communication device of each positioning point, and update the target active set cell to the set of cells of the positioning point, the target active set cell The set cell refers to the active set cell with the highest occurrence probability among all the active set cells of the positioning communication device of the positioning point.

With reference to the second aspect or the second possible implementation of the second aspect or the second possible implementation of the second aspect, in a fourth possible implementation, the acquiring unit is further configured to acquire each Active set cells at multiple time points of the target communication device;

The first selection unit is also used to select the target positioning point of each target communication device at each time point from the positioning points of the road, and use the target positioning point as the target at this time point the location of the communication device in said road;

The monitoring unit is also used to calculate the moving speed of the at least one target communication device in the target section of the road, and use the moving speed as the speed of the vehicle in the target section, and the target section is two and/or, according to the position of the at least one target communication device in the road, calculate the number of vehicles in each road section of the road.

With reference to the fourth possible implementation of the second aspect, in a fifth possible implementation, the monitoring unit is further configured to select a target anchor point from the at least one target communication device as the position in the road The first communication device of the continuous positioning point, and calculate the moving speed of the first communication device in the target road section of the road, and use the moving speed as the speed of the vehicle in the target road section.

In the above technical solution, the active set cell of at least one target communication device is obtained, and the target communication device is a communication device located in the vehicle; the target anchor point of each target communication device is selected from the anchor points of the road, and Taking the target positioning point as the position of the target communication device on the road; the positioning point with the highest coincidence degree between the cell set of the target positioning point and the active set cell of the target communication device; according to the at least one The location of the target communication device in the road monitors traffic on the road. Both the communication equipment and the community are existing, so there is no need to increase additional costs, and there are communication equipment in each vehicle at present, so that each vehicle can be monitored, so that intelligent transportation can be realized at low cost and with high accuracy traffic monitoring.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic flow diagram of a method for monitoring road traffic provided by an embodiment of the present invention;

FIG. 2 is a schematic flowchart of a method for monitoring road traffic provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram of an optional cell projection point provided by an embodiment of the present invention;

Fig. 4 is a schematic structural diagram of a device for monitoring road flow provided by an embodiment of the present invention;

Fig. 5 is a schematic structural diagram of another device for monitoring road flow provided by an embodiment of the present invention;

Fig. 6 is a schematic structural diagram of another device for monitoring road flow provided by an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Fig. 1 is a schematic flowchart of a method for monitoring road traffic provided by an embodiment of the present invention, as shown in Fig. 1 , including:

101. Obtain an active set cell of at least one target communication device, where the target communication device is a communication device located in a vehicle;

102. Select the target positioning point of each target communication device from the positioning points of the road, and use the target positioning point as the position of the target communication device on the road; wherein, the target positioning The positioning point with the highest coincidence degree between the cell set of the point and the active set cell of the target communication device;

103 Monitor traffic on the road according to the location of the at least one target communication device on the road.

Optionally, the above-mentioned target communication device may be a mobile communication device, such as a mobile phone, a tablet computer, a notebook, and the like. It can also be a communication device fixed on the vehicle.

Optionally, the above road may be one or more roads.

Optionally, monitoring the traffic of the road may include:

Monitor the number and status of vehicles on the road (for example: driving speed, etc.).

Optionally, the embodiments of the present invention can be applied to any device for monitoring road traffic.

In the above technical solution, the active set cell of at least one target communication device is obtained, and the target communication device is a communication device located in the vehicle; the target anchor point of each target communication device is selected from the anchor points of the road, and The target positioning point is used as the position of the target communication device in the road; the target positioning point is the positioning point with the highest coincidence degree between the cell set of the positioning point and the active set cell of the target communication device; according to the The traffic of the road is monitored based on the position of the at least one target communication device in the road. Both the communication equipment and the community are existing, so there is no need to increase additional costs, and there are communication equipment in each vehicle at present, so that each vehicle can be monitored, so that intelligent transportation can be realized at low cost and with high accuracy traffic monitoring.

Fig. 2 is a schematic flowchart of another method for monitoring road traffic provided by an embodiment of the present invention, as shown in Fig. 2 , including:

201. Calculate coordinate values of a projection point on the road, where the projection point refers to a location point on the road in a shortest route from a pre-designated base station to the road.

Optionally, the aforementioned pre-specified base station may be any base station in the communication system, and the number of base stations is not limited. The above shortest route may be a straight line from the base station to the road, and the straight line is perpendicular to the road.

设基站到道路的最短距离的投影点的坐标为(x₄，y₄)，则满足：Optionally, suppose the position of the base station is <(x ₁ , y ₁ )>, the position of road i is <road _i , (x2, y ₂ ), (x ₃ , y ₃ ), β>, then the road i’s The equation of a straight line can be expressed as

Let the coordinates of the projection point of the shortest distance from the base station to the road be (x ₄ , y ₄ ), then satisfy:

${\mathrm{<span\; class="notranslate">\; the\; y</span>}}_{\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; the\; y</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; the\; y</span>}}_{\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; the\; y</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}}{{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span>$

$\frac{{\mathrm{<span\; class="notranslate">\; the\; y</span>}}_{\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; the\; y</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}{{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}<span\; class="notranslate">\; \&times;</span>\frac{{\mathrm{<span\; class="notranslate">\; the\; y</span>}}_{\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; the\; y</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}}{{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}}<span\; class="notranslate">\; =</span><span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}$

According to the above formula, the coordinate value of the projection point of the base station on the road can be obtained.

As an optional implementation manner, step 201 may include:

calculating the coordinate values of the position points on the road in the shortest route from the pre-designated base station to the road;

Selecting from the pre-designated base stations a position point on the road in the shortest route from the base station meeting the preset condition to the road as the projection point of the road;

Wherein, the precondition is that the shortest distance from the base station to the road is greater than or equal to the maximum radiation radius of the base station.

Optionally, as shown in Figure 3, the road includes R1, R2, R3, R4, and R5, and the base station includes A, B, C, D, E, F, and G. Taking base station A as an example, it is possible to calculate The projection points of base station A on the above road are A ₁₁ , A ₂₂ , A ₃₃ , A ₁₄ , A ₁₅ , and the distances from base station A to each projection point are δ ₁ , δ ₂ , δ ₃ , δ ₄ , δ ₅ , (x ₁ , y ₁ ), (x ₂ , y ₂ ), (x ₃ , y ₃ ), (x ₄ , y ₄ ), (x ₅ , y ₅ ) are base station A on each road The projected point coordinates of . If δ ₅ >r, r is the maximum radiation radius of base station A, then remove the projection point A ₁₅ , and the projection point of base station A on the above road can be output as:

<cell ₁ , 1, road ₁ , (x ₁ , y ₁ )><cell ₁ , 4, road ₄ , (x ₄ , y ₄ )><cell ₂ , 2, road ₂ , (x ₂ , y ₂ ) >, <cell _{3, 3} , road ₃ , (x ₃ , y ₃ )>

Among them, the base station A includes cell 1, cell 2 and cell 3. The above cell 1 and ₁ represent the cell coverage of the cell 1 included in the base station A on the road R1, and the above cell _{1 and 4} represent the cell 1 included in the base station A on the road R4. of cell coverage.

202. Calculate the average coordinate value of the projection point of each road section in the road, and use the position point of the average coordinate value as the anchor point of the road section, and the average coordinate value is the coordinate value of all the projection points of the road section average of.

Optionally, for each road, set the positioning target accuracy to p, set a certain target point on the road as the starting point to R _st , and take the accuracy p as the step size, that is, the step size is understood as the above road section, and the statistics are from The set of projected points within the range from the starting point to the step length (that is, the above-mentioned road section), that is, the set of projected points in the statistical (R _st , R _st +p), let this set be I _cell , and the coordinates of each projected point are (x _i , y _i ). Determine that the anchor point of this road section is the center R _l of all projection points in this road section, and set the coordinates of the center as (R _lx , R _ly ), that is, the coordinate value of the anchor point of this road section, then satisfy:

$<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; x</span>}}<span\; class="notranslate">\; ,</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; the\; y</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span><span\; class="notranslate">\; (</span>\frac{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}}{\mathrm{<span\; class="notranslate">\; no</span>}}<span\; class="notranslate">\; ,</span>\frac{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}{\mathrm{<span\; class="notranslate">\; the\; y</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}}{\mathrm{<span\; class="notranslate">\; no</span>}}<span\; class="notranslate">\; )</span>$

Among them, n is the number of elements in the set, that is, the number of projected points of the road section.

203. Take the set of cells corresponding to all the projection points of each road section as the cell set of the location point of the road section, the cell corresponding to the projection point refers to the base station closest to the projection point and covers the projection point district.

Optionally, obtaining the cell corresponding to the projection point can be obtained in the following manner:

Calculate the azimuth angle of the line connecting the base station and the projection point, assuming it is γ; the azimuth angles of cell ₁ , cell ₂ , and cell ₃ included in the base station are α, α+120, and α+240 respectively;

Judge the relationship between the included angle γ and α;

When α-120≤γ≤α, determine cell ₁ as the cell corresponding to the projection point;

When α≤γ≤α+120, determine cell ₂ as the cell corresponding to the projection point;

When α+120≤γ≤α+240, cell ₃ is determined to be the cell corresponding to the projection point.

Optionally, the information of the projection point can be output in the format of <cell, road, (x4, y4)>. For example, if cell ₁ is set as the cell corresponding to the projection point, and the road is road _i , then <cell _{1, i} can be output , road _i , (x ₄ , y ₄ )>.

Optionally, after step 203, the method further includes:

Establish the mapping relationship between the positioning point and the cell on the road. Can refer to the representation shown.

Table 1

location point Community collection R _l1 cell ₁ , cell ₂ , cell ₃ R _l2 cell ₄ , cell ₅ , cell _{6 L3} cell ₇ , cell ₈ , cell ₉

That is, the mapping relationship between R _l1 and cell ₁ , cell ₂ , and cell ₃ is established on the road, and R _l2 and R _l3 are not described peacefully and repeatedly.

It should be noted that the above-mentioned steps 201 to 203 can be executed in advance, and when road vehicles are monitored in real time, it can be executed directly from step 204 .

204. Acquire an active set cell of at least one target communication device, where the target communication device is a communication device located in the vehicle.

As an optional implementation manner, step 204 may include:

Extracting the active set cell information of the at least one target communication device from the wireless network log to obtain the active set cell of the at least one target communication device.

Optionally, the aforementioned active set cells refer to a set of cells that establish a connection with the target communication device station, or a set of cells that the target communication device can receive signals from.

205. Select the target positioning point of each target communication device from the positioning points of the road, and use the target positioning point as the position of the target communication device on the road; wherein, the target positioning The positioning point with the highest coincidence degree between the cell set of the point and the active set cell of the target communication device;

Optionally, selecting the target positioning point of each target communication device from the positioning points of the road may be selected in the following manner:

For a communication device, calculate the coincidence degree of the active set cell of the target communication device with the cell set of each anchor point in the road above by the following formula:

$\mathrm{sim}=\frac{I_{\mathrm{cell}}\&cap;A_{u,\mathrm{cell}}}{I_{\mathrm{cell}}\&cup;A_{u,\mathrm{cell}}}$ ... (Formula 5)

Wherein, sim is the coincidence degree of the active set cell of the target communication device and the cell set of the anchor point, A _{u, cell} is the active set cell of the target communication device, and I _cell is the cell set of a certain anchor point;

In this way, the target positioning point of the target communication device can be calculated through multiple calculations, that is, calculating the active set cell of a target communication device and the cell sets of multiple positioning points. Then, the target positioning point of the at least one target communication device can be calculated through the above method.

206. Monitor traffic on the road according to the location of the at least one target communication device on the road.

Optionally, the above monitoring may include:

Monitor the number of vehicles on the road, monitor the speed of vehicles on the road and other road conditions.

As an optional implementation manner, step 204 may include:

Acquiring active set cells at multiple time points of each target communication device;

Step 205 may include:

Select the target positioning point of each target communication device at each of the time points from the positioning points of the road, and use the target positioning point as the target communication device at the time point in the road. s position;

Step 206 may include:

Calculate the moving speed of the target section of the at least one target communication device in the road, and use the moving speed as the speed of the vehicle in the target section, and the target section is between the two target positioning points and/or

The number of vehicles in each section of the road is calculated according to the position of the at least one target communication device on the road.

Optionally, for example, the above-mentioned target road section is a road section between anchor points _R1 and _R2 , and the time difference at the time point when the target anchor point is anchor point _R1 and _R2 in the above-mentioned at least one target communication device can be used, such Just can divide the distance of the road section between _R1 and _R2 by the time difference at the time point when the target positioning point is the positioning point _R1 and _R2 in at least one target communication device, to obtain the at least one target communication device at the target Segment movement speed.

Of course, it is also possible to calculate the moving speed of each communication device in the above-mentioned at least one target communication device on the above-mentioned target road section. Specifically, it is possible for each target communication device to move at the time point when the target positioning point is the positioning point _R1 and _R2 . The time difference and the distance of the target road section are used to calculate the moving speed of each target communication device on the target road section.

Optionally, the calculation of the moving speed of the at least one target communication device on the target road section in the road, and using the moving speed as the speed of the vehicle in the target road section may include:

Selecting from the at least one target communication device a first communication device whose target anchor point is a continuous anchor point in the road;

Calculate the moving speed of the first communication device on the target road section of the road, and use the moving speed as the speed of the vehicle in the target road section.

The above-mentioned first communication device whose target positioning point is a continuous positioning point on the road may refer to the first communication device whose continuous target positioning point is a continuous positioning point on the road at time points, for example, two consecutive time points point t ₁ , t ₂ , and the target positioning points of the communication device U ₁ at time points t ₁ , t ₂ are R ₁ and R ₂ , and the positioning points R ₁ and R ₂ are the positioning points connecting the two positions in the above road , so that the communication device _U1 can be determined as the first communication device. That is, the above-mentioned first communication device is a communication device included in a vehicle that has been driving on the above-mentioned road for a certain period of time (that is, when the moving speed of the vehicle on the road needs to be calculated).

Optionally, the above calculation of the number of vehicles in each section of the road can obtain the number of vehicles in each section through the number of communication devices where the anchor points included in each section are located.

Optionally, take the time points t ₁ , t ₂ , t ₃ , t ₄ , t ₅ , and the communication devices U ₁ and U ₂ as examples for illustration below, wherein the communication devices U ₁ and U _{2 1} , t ₂ , t ₃ , t ₄ , and t ₅ target positioning points are shown in Table 2:

Table 2:

user time active set cell A collection of anchor point cells Coincidence degree location point U ₁ t ₁ cell ₁ , cell ₂ , cell ₃ cell ₁ , cell ₂ , cell ₃ 1 R ₁ U ₁ t ₂ cell2, cell3, _cell4 , _cell5 , cell2, _cell3 , _cell4 0.75 R ₂ U ₂ t ₃ cell ₆ , cell ₇ , cell ₈ cell ₇ , cell ₈ 0.67 R ₃ U _{2 t4} cell ₈ , cell ₉ cell ₇ , cell ₈ , cell ₉ 0.67 R ₄ U ₂ t ₅ cell ₈ , cell ₉ , cell ₁₀ , cell ₁₁ cell ₈ , cell ₉ , cell ₁₀ 0.75 R ₅

As shown in Table 2 above, assume that the active set cells of communication devices U ₁ and U ₂ at different times are the active set cells in the above table, and the cell sets of the positioning points are compared with the communication devices U ₁ and U ₂ at different times The coincidence degree of the cells in the active set, the cell set of the selected positioning point and the active set cells of the communication equipment U ₁ and U ₂ at different times have the highest coincidence degree, and the positioning point is the target positioning of the target communication device at this time point point, that is, the target positioning points of communication device U ₁ at t ₁ and t ₂ are R ₁ and R ₂ respectively, that is, the positions of communication device U ₁ at t ₁ and t ₂ are respectively R ₁ and R ₂ ; The target positioning points of the communication device U ₂ at t ₃ , t ₄ , and t ₅ are respectively R ₃ , R _{4 ,} and R ₅ , that is, the location of the communication device U ₂ at the time points t ₃ , t ₄ , and t ₅ are positions R ₃ , R ₄ and R ₅ , respectively.

Optionally, it is assumed that the moving speeds of the above-mentioned communication devices on the above-mentioned roads in the time series t ₁ ...t _i are respectively v ₁ ...v _i , and the reference speed of the traffic flow on this road is v ₀ , then when v _i ≥ _{v 0} When , the reference speed of the road traffic flow can be adjusted to v _i . In addition, v ₀ can be dynamically adjusted according to the traffic state of the road.

Optionally, the method may also include:

For a certain road section, currently the target positioning points of n _u target communication devices are on this road section, according to the moving speed v of these target communication devices in the time series and the reference speed v ₀ in this road section, determine the traffic condition of the current road section . Assuming that among the n _u communication devices in the first k time points, there are n _a communication devices whose speed satisfies v≥v ₀ , and the average speed of these n _a target communication devices on this road section satisfies v<v ₀ , then It can be determined that the current traffic state of the road segment is not good.

As an optional implementation manner, the method may also periodically update the set of cells of each anchor point on the road above. That is, after step 203, the method may further include:

Select a positioning communication device for each positioning point of the road within a preset period, and the positioning communication device refers to the communication device with the highest degree of coincidence between the cell set of the positioning point and the active set cell;

Select the target active set cell of the positioning point from the active set cells of the positioning communication equipment of each positioning point, and update the target active set cell to the cell set of the positioning point, and the target active set cell refers to the cell set of the positioning point The active set cell with the highest occurrence probability among all the active set cells of the positioning communication device of the positioning point.

Optionally, in this embodiment of the present invention, step 201, step 202, and step 203 may be performed in advance, and the steps of selecting and positioning the communication device and updating the cell set of the positioning point in this embodiment may be performed periodically, For example, it is performed once a day, while step 204, step 205, and step 206 may be performed in real time, or may be performed according to a certain period or a specified time point. That is, step 204 may be performed before or after the steps of selecting and positioning the communication device and updating the cell set of the positioning point.

Optionally, for a certain positioning point R ₁ , the number of positioning communication devices that select the positioning point R ₁ within the preset period is 100, but in practice these 100 communication devices are the positioning point R ₁ at the target positioning point The cells included in the active set cells may be different. For example, the cells included in the active set cells of the communication device _U1 and the communication device _U2 when the target anchor point is the anchor point _R1 are cell ₁ and cell ₂ respectively. , cell ₃ and cell ₁ , cell ₂ , cell ₃ , cell ₄ , and among these 100 communication devices when the target anchor point is anchor point R ₁ , the cells in the active set cells are cell ₁ , cell ₂ , cell ₃ , when the probability of cell ₄ is the highest, such as 80%, so that cell ₁ , cell ₂ , cell ₃ , and cell ₄ can be used as the target active set cell of the anchor point R ₁ , and then the target active set cell can be updated as the anchor point The cell set of R ₁ .

In the above technical solutions, on the basis of the above embodiments, a variety of implementations for monitoring road flow are added, and all of them can realize the flow monitoring of intelligent traffic with low cost and high accuracy.

The following is the embodiment of the device of the present invention, which is used to execute the method realized by the method embodiment 1 to 2 of the present invention. For the convenience of description, only the parts related to the embodiment of the present invention are shown, and the specific technical details are not disclosed. , please refer to Embodiment 1 and Embodiment 2 of the present invention.

Fig. 4 is a schematic structural diagram of a device for monitoring road traffic provided by an embodiment of the present invention. As shown in Fig. 4, it includes: an acquisition unit 31, a first selection unit 32, and a monitoring unit 33, wherein:

An acquisition unit 31, configured to acquire an active set cell of at least one target communication device, where the target communication device is a communication device located in the vehicle;

The first selection unit 32 is configured to select a target positioning point of each target communication device from the positioning points of the road, and use the target positioning point as the position of the target communication device on the road; Wherein, the cell set of the target positioning point is the positioning point with the highest coincidence degree with the active set cell of the target communication device;

The monitoring unit 33 is configured to monitor the traffic of the road according to the position of the at least one target communication device on the road.

Optionally, the above-mentioned target communication device may be a mobile communication device, such as a mobile phone, a tablet computer, a notebook, and the like. It can also be a communication device fixed on the vehicle.

Optionally, the above road may be one or more roads.

Optionally, monitoring the traffic of the road may include:

Monitor the number and status of vehicles on the road (for example: driving speed, etc.).

Optionally, the embodiments of the present invention can be applied to any device for monitoring road traffic.

In the above technical solution, the active set cell of at least one target communication device is obtained, and the target communication device is a communication device located in the vehicle; the target anchor point of each target communication device is selected from the anchor points of the road, and The target positioning point is used as the position of the target communication device in the road; the target positioning point is the positioning point with the highest coincidence degree between the cell set of the positioning point and the active set cell of the target communication device; according to the The traffic of the road is monitored based on the position of the at least one target communication device in the road. Both the communication equipment and the community are existing, so there is no need to increase additional costs, and there are communication equipment in each vehicle at present, so that each vehicle can be monitored, so that intelligent transportation can be realized at low cost and with high accuracy traffic monitoring.

Fig. 5 is a schematic structural diagram of another road flow monitoring device provided by an embodiment of the present invention. As shown in Fig. 5, it includes: a first calculation unit 41, a second calculation unit 42, a determination unit 43, an acquisition unit 44, Selection unit 45 and monitoring unit 46, wherein:

The first calculation unit 41 is configured to calculate coordinate values of a projection point on the road, where the projection point refers to a position point on the road in the shortest route from the pre-designated base station to the road.

Optionally, the aforementioned pre-specified base station may be any base station in the communication system, and the number of base stations is not limited.

Optionally, the first calculation unit 41 may also be used to calculate the coordinate values of the position points on the road in the shortest route from the pre-designated base station to the road, and select the pre-designated base station that satisfies the predetermined Assume that the position point on the road in the shortest route from the conditional base station to the road is used as the projection point of the road;

Wherein, the precondition is that the shortest distance from the base station to the road is greater than or equal to the maximum radiation radius of the base station.

The second calculation unit 42 is used to calculate the average coordinate value of the projected point of each road section in the road, and use the position point of the average coordinate value as the anchor point of the road section, and the average coordinate value is the location point of the road section The average of the coordinate values of all projected points.

The determination unit 43 is configured to use the set of cells corresponding to all projection points of each road section as the cell set of the road section positioning point, and the cell corresponding to the projection point refers to the base station that is closest to the projection point and covers The cell of the projected point.

The obtaining unit 44 is configured to obtain an active set cell of at least one target communication device, where the target communication device is a communication device located in the vehicle.

As an optional implementation manner, the obtaining unit 44 may also be configured to extract the active set cell information of at least one target communication device from the wireless network log, so as to obtain the active set cell of the at least one target communication device.

The first selection unit 45 is configured to select the target positioning point of each target communication device from the positioning points of the road, and use the target positioning point as the position of the target communication device on the road; Wherein, the cell set of the target positioning point is the positioning point with the highest degree of coincidence with the cells in the active set of the target communication device.

The monitoring unit 46 is configured to monitor the traffic of the road according to the position of the at least one target communication device on the road.

Optionally, the above monitoring may include:

Monitor the number of vehicles on the road, monitor the speed of vehicles on the road and other road conditions.

As an optional implementation manner, the acquiring unit 44 may also be configured to acquire active set cells at multiple time points of each target communication device;

The first selection unit 45 can also be used to select the target positioning point of each target communication device at each of the time points from the positioning points of the road, and use the target positioning point as the target at the time point the location of the communication device in said road;

The monitoring unit 46 can also be used to calculate the moving speed of the at least one target communication device in the target section of the road, and use the moving speed as the speed of the vehicle in the target section, and the target section is two and/or, according to the position of the at least one target communication device in the road, calculate the number of vehicles in each road section of the road.

Optionally, the monitoring unit 46 may also be used to select from the at least one target communication device a first communication device whose target positioning point is a continuous positioning point in the road; and calculate the first communication device The moving speed of the target road section in the road, and the moving speed is used as the speed of the vehicle in the target road section.

As an optional implementation manner, the device may also include:

The second selection unit (not shown in the drawings) is used to select a positioning communication device for each positioning point of the road within a preset period, and the positioning communication device refers to the cell set and activation of the positioning point The communication equipment with the highest degree of cell overlap;

An updating unit (not shown in the drawings), configured to select a target active set cell of the positioning point from the active set cells of the positioning communication device of each positioning point, and update the target active set cell to the positioning point The target active set cell refers to the active set cell with the highest occurrence probability among all the active set cells of the positioning communication device of the positioning point.

In the above technical solutions, on the basis of the above embodiments, a variety of implementations for monitoring road flow are added, and all of them can realize the flow monitoring of intelligent traffic with low cost and high accuracy.

Fig. 6 is a schematic structural diagram of another monitoring road flow device provided by an embodiment of the present invention, as shown in Fig. 6, including: a memory 51, and a processor 52 connected to the storage, the memory 51 is used to store a set of program codes, The processor 52 is used to call the program stored in the memory 51 to perform the following operations:

Acquiring an active set cell of at least one target communication device, where the target communication device is a communication device located in a vehicle;

Select the target positioning point of each target communication device from the positioning points of the road, and use the target positioning point as the position of the target communication device in the road; wherein, the target positioning point The positioning point with the highest coincidence degree between the cell set and the active set cell of the target communication device;

Traffic on the road is monitored based on the location of the at least one target communication device on the road.

Optionally, the foregoing communication device may be a mobile communication device, such as a mobile phone, a tablet computer, a notebook, and the like. It can also be a communication device fixed on the vehicle.

Optionally, the above road may be one or more roads.

Optionally, monitoring the traffic of the road may include:

Monitor the number and status of vehicles on the road (for example: driving speed, etc.).

In another optional embodiment, the processor 52 may also be configured to perform the following operations:

calculating coordinate values of a projection point on the road, where the projection point refers to a location point on the road in the shortest route from the pre-designated base station to the road;

Calculate the average coordinate value of the projection point of each road segment in the road, and use the position point of the average coordinate value as the anchor point of the road segment, and the average coordinate value is the average of the coordinate values of all the projection points of the road segment value;

The set of cells corresponding to all projection points of each road section is used as the set of cells of the road section positioning point, and the cell corresponding to the projection point refers to the cell that is included in the base station closest to the projection point and covers the projection point ;

Acquiring an active set cell of at least one target communication device, where the target communication device is a communication device located in a vehicle;

Select the target positioning point of each target communication device from the positioning points of the road, and use the target positioning point as the position of the target communication device in the road; wherein, the target positioning point The positioning point with the highest coincidence degree between the cell set and the active set cell of the target communication device;

Traffic on the road is monitored based on the location of the at least one target communication device on the road.

As an optional implementation manner, the operation performed by the processor 52 to calculate the coordinate values of the projected points on the road may include:

calculating the coordinate values of the position points on the road in the shortest route from the pre-designated base station to the road;

Selecting from the pre-designated base stations a position point on the road in the shortest route from the base station meeting the preset condition to the road as the projection point of the road;

Wherein, the precondition is that the shortest distance from the base station to the road is greater than or equal to the maximum radiation radius of the base station.

As an optional implementation manner, the operation performed by the processor 52 to obtain the active set cell of at least one target communication device may include:

Extracting the active set cell information of the at least one target communication device from the wireless network log to obtain the active set cell of the at least one target communication device.

As an optional implementation manner, the operation performed by the processor 52 to obtain the active set cell of at least one target communication device may include:

Acquiring active set cells at multiple time points of each target communication device;

The operation performed by the processor 52 to select the target positioning point of each target communication device from the positioning points of the road, and use the target positioning point as the position of the target communication device on the road may include :

Select the target positioning point of each target communication device at each of the time points from the positioning points of the road, and use the target positioning point as the target communication device at the time point in the road. s position;

The operation performed by the processor 52 to monitor the traffic of the road according to the position of the at least one target communication device on the road may include:

Calculate the moving speed of the target section of the at least one target communication device in the road, and use the moving speed as the speed of the vehicle in the target section, and the target section is between the two target positioning points and/or

The number of vehicles in each section of the road is calculated according to the position of the at least one target communication device on the road.

Optionally, the calculation performed by the processor 52 to calculate the moving speed of the target road section of the at least one communication in the road, and using the moving speed as the speed of the vehicle in the target road section may include:

Selecting from the at least one target communication device a first communication device whose target anchor point is a continuous anchor point in the road;

Calculate the moving speed of the first communication device on the target road section of the road, and use the moving speed as the speed of the vehicle in the target road section.

As an optional implementation manner, after the processor 52 performs the operation of using the set of cells corresponding to all projection points of each road segment as the cell set of the anchor point of the road segment, it can also be used to perform the following operations:

Select a positioning communication device for each positioning point of the road within a preset period, and the positioning communication device refers to the communication device with the highest degree of coincidence between the cell set of the positioning point and the active set cell;

Select the target active set cell of the positioning point from the active set cells of the positioning communication equipment of each positioning point, and update the target active set cell to the cell set of the positioning point, and the target active set cell refers to the cell set of the positioning point The active set cell with the highest occurrence probability among all the active set cells of the positioning communication device of the positioning point.

In the above technical solution, the active set cell of at least one target communication device is obtained, and the target communication device is a communication device located in the vehicle; the target anchor point of each target communication device is selected from the anchor points of the road, and The target positioning point is used as the position of the target communication device in the road; the target positioning point is the positioning point with the highest coincidence degree between the cell set of the positioning point and the active set cell of the target communication device; according to the The traffic of the road is monitored based on the position of the at least one target communication device in the road. Both the communication equipment and the community are existing, so there is no need to increase additional costs, and there are communication equipment in each vehicle at present, so that each vehicle can be monitored, so that intelligent transportation can be realized at low cost and with high accuracy traffic monitoring.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented through computer programs to instruct related hardware, and the programs can be stored in a computer-readable storage medium. During execution, it may include the processes of the embodiments of the above-mentioned methods. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM for short).

The above disclosures are only preferred embodiments of the present invention, and certainly cannot limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims (12)

1. a monitoring vehicle flow method is characterized in that, comprising:

Obtain the Active Set residential quarter of at least one target communication device, described target communication device is the communication facilities that is positioned at vehicle;

From the anchor point of road, select the target localization point of each described target communication device, and with described target localization point as this target communication device residing position in described road; Wherein, the Active Set residential quarter registration of the set of cells of described target localization point and this target communication device is the highest;

Flow according to described at least one target communication device described road of residing monitoring position in described road.

2. the method for claim 1, it is characterized in that, the described target localization point of from the anchor point of road, selecting each described target communication device, and with described target localization point as this target communication device in described road before the residing position, described method also comprises:

Calculate the coordinate figure of the subpoint on the described road, described subpoint refers to the location point of preassigned base station to the road described in the generic line of described road;

Calculate the average coordinates value of the subpoint in each highway section in the described road, and with the location point of the described average coordinates value anchor point as this highway section, the mean value of the coordinate figure of all subpoints that described average coordinates value is this highway section;

With the set of all subpoint corresponding district in each highway section set of cells as this highway section anchor point, described subpoint corresponding district refers to from residential quarter that comprise and that cover described subpoint, the nearest base station of described subpoint.

3. method as claimed in claim 2 is characterized in that, the coordinate figure of the subpoint on the described road of described calculating comprises:

Calculate the coordinate figure of the location point of preassigned base station to the road described in the generic line of described road;

From described preassigned base station, select and satisfy the location point of pre-conditioned base station to the road described in the generic line of described road as the subpoint of described road;

Wherein, described condition in advance is the base station is greater than or equal to this base station to the bee-line of described road greatest irradiation radius.

4. as claim 2 or 3 described methods, it is characterized in that after the set of cells of set as this highway section anchor point of described all subpoint corresponding district with each highway section, described method also comprises:

Select the positioning and communicating equipment of each anchor point of described road in predetermined period, described positioning and communicating equipment refers to the communication facilities that the set of cells of this anchor point and Active Set residential quarter registration are the highest;

From the Active Set residential quarter of the positioning and communicating equipment of each anchor point, select the target Active Set residential quarter of this anchor point, and be the set of cells of this anchor point with this target Active Set cell update, described target Active Set residential quarter refers to the highest Active Set residential quarter of probability of occurrence in all activated collection residential quarter of positioning and communicating equipment of this anchor point.

5. as each described method among the claim 1-3, it is characterized in that the described Active Set residential quarter that obtains at least one target communication device comprises:

Obtain the Active Set residential quarter of a plurality of time points of each described target communication device;

The described target localization point of from the anchor point of road, selecting each described target communication device, and with described target localization point as this target communication device residing position in described road, comprising:

From the anchor point of road, select each described target communication device at the target localization point of each described time point, and with this target communication device in described road the residing position of described target localization point as this time point;

Described flow according to described at least one target communication device described road of residing monitoring position in described road comprises:

Calculate the target highway section translational speed of described at least one target communication device in described road, and the speed that described translational speed is travelled as vehicle in the described target highway section, described target highway section is two highway sections between the described target localization point; And/or

According to described at least one target communication device residing position in described road, calculate in the described road quantity of vehicle in each highway section.

6. method as claimed in claim 5 is characterized in that, describedly calculates the target highway section translational speed of described at least one communication in described road, and with described translational speed as the speed that vehicle in the described target highway section travels, comprising:

From described at least one target communication device, select target localization point and be first communication facilities of the continuous anchor point in position in the described road;

Calculate the target highway section translational speed of described first communication facilities in described road, and the speed that described translational speed is travelled as vehicle in the described target highway section.

7. a monitoring vehicle flow equipment is characterized in that, comprising: acquiring unit, first selected cell and monitoring unit, wherein:

Described acquiring unit, for the Active Set residential quarter that obtains at least one target communication device, described target communication device is the communication facilities that is positioned at vehicle;

Described first selected cell is used for selecting from the anchor point of road the target localization point of each described target communication device, and with described target localization point as this target communication device residing position in described road; Wherein, the highest anchor point of Active Set residential quarter registration of the set of cells of described target localization point and this target communication device;

Described monitoring unit is used for according to the flow of described at least one target communication device at the described road of the residing monitoring position of described road.

8. equipment as claimed in claim 7 is characterized in that, described equipment also comprises:

First computing unit be used for to calculate the coordinate figure of the subpoint on the described road, and described subpoint refers to the location point of preassigned base station to the road described in the generic line of described road;

Second computing unit be used for to calculate the average coordinates value of the subpoint in each highway section of described road, and with the location point of the described average coordinates value anchor point as this highway section, the mean value of the coordinate figure of all subpoints that described average coordinates value is this highway section;

Determining unit is used for the set of all subpoint corresponding district in each highway section set of cells as this highway section anchor point, and described subpoint corresponding district refers to from residential quarter that comprise and that cover described subpoint, the nearest base station of described subpoint.

9. equipment as claimed in claim 8, it is characterized in that, described first computing unit also be used for to calculate the coordinate figure of the location point of preassigned base station to the road described in the generic line of described road, and selects from described preassigned base station and satisfy the location point of pre-conditioned base station to the road described in the generic line of described road as the subpoint of described road;

Wherein, described condition in advance is the base station is greater than or equal to this base station to the bee-line of described road greatest irradiation radius.

10. equipment as claimed in claim 8 or 9 is characterized in that described equipment also comprises:

Second selected cell is used for selecting the positioning and communicating equipment of each anchor point of described road in predetermined period, and described positioning and communicating equipment refers to the communication facilities that the set of cells of this anchor point and Active Set residential quarter registration are the highest;

Updating block, be used for selecting from the Active Set residential quarter of the positioning and communicating equipment of each anchor point the target Active Set residential quarter of this anchor point, and be the set of cells of this anchor point with this target Active Set cell update, described target Active Set residential quarter refers to the highest Active Set residential quarter of probability of occurrence in all activated collection residential quarter of positioning and communicating equipment of this anchor point.

11., it is characterized in that described acquiring unit also is used for obtaining the Active Set residential quarter of a plurality of time points of each described target communication device as each described equipment among the claim 7-9;

Described first selected cell also is used for selecting each described target communication device at the target localization point of each described time point from the anchor point of road, and with this target communication device in described road the residing position of described target localization point as this time point;

Described monitoring unit also is used for calculating described at least one target communication device in the target highway section of described road translational speed, and the speed that described translational speed is travelled as vehicle in the described target highway section, described target highway section is two highway sections between the described target localization point; And/or, according to described at least one target communication device residing position in described road, calculate in the described road quantity of vehicle in each highway section.

12. equipment as claimed in claim 11, it is characterized in that, described monitoring unit also is used for selecting target localization point from described at least one target communication device and is first communication facilities of the continuous anchor point in position the described road, and calculate the target highway section translational speed of described first communication facilities in described road, and the speed that described translational speed is travelled as vehicle in the described target highway section.

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