WO2011150712A1

WO2011150712A1 - Processing method and processing device of traffic flow information

Info

Publication number: WO2011150712A1
Application number: PCT/CN2011/072015
Authority: WO
Inventors: 贾学力; 李建军; 庄明亮
Original assignee: 北京世纪高通科技有限公司
Priority date: 2010-06-02
Filing date: 2011-03-21
Publication date: 2011-12-08
Also published as: CN101866551B; CN101866551A

Abstract

A processing method and a processing device of traffic flow information are provided. The method comprises the following steps: acquiring traffic flow information and traffic event information; verifying and correcting the traffic flow information and outputting the corrected traffic flow information according to the traffic event information.

Description

Method and device for processing traffic flow information

This application claims priority to Chinese Patent Application No. 201010196401.0, entitled "Processing and Processing Device for Traffic Flow Information", filed on June 2, 2010, the entire contents of which are incorporated by reference. In this application.

Technical field

The present invention relates to the field of intelligent transportation technologies, and in particular, to a method and a processing device for processing traffic flow information.

Background technique

In recent years, with the rapid growth of urban demand for transportation, traffic problems have become increasingly serious. Intelligent Transportation System (ITS) effectively applies advanced information technology, data communication transmission technology, automatic control technology and computer processing technology to the entire transportation management system, which can provide feasible for many problems facing urban traffic. The research in its related fields is increasingly valued by various countries.

The floating car data acquisition and processing system is a new type of traffic flow data acquisition technology developed in recent years. The floating car refers to a general-purpose vehicle (such as a taxi, bus, etc.) equipped with positioning and wireless communication, which can exchange information with the traffic information center. When the floating car is traveling on the road, the traffic flow related data is periodically sent to the traffic information center, and according to the traffic flow related data, the traffic flow information of the current road can be directly and conveniently processed. However, the existing processing techniques for floating car data have the following limitations: 1) GPS (Global Positioning System) data positioning has errors; 2) path speculation is wrong, but existing map matching techniques and path speculation techniques are The above technical problems cannot be completely solved.

The inventors have found that for roads where there may be no floating cars passing through, due to the limitations of the floating car data processing technique described above, the road generates traffic flow information, which greatly reduces the accuracy of the traffic flow information.

Summary of the invention Embodiments of the present invention provide a method and a processing apparatus for processing traffic flow information, which can improve the accuracy of traffic flow information.

In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:

A method for processing traffic flow information, including:

Obtain traffic flow information and traffic event information;

The traffic flow information is verified according to the traffic event information, the traffic flow information is corrected, and the corrected traffic flow information is output.

Corresponding to the processing method of the traffic flow information, the embodiment of the present invention further provides a device for processing traffic flow information, including:

a traffic flow information acquiring unit, configured to acquire traffic flow information;

a traffic event information acquiring unit, configured to acquire traffic event information;

And a verification and correction unit, configured to verify the traffic flow information according to the traffic event information, correct the traffic flow information, and output the corrected traffic flow information.

The method and a processing device for processing traffic flow information provided by the embodiments of the present invention acquire traffic flow information collected by a floating vehicle, and obtain traffic event information based on manual statistics or other methods for collecting information, and use traffic event information to analyze traffic flow information. The verification is performed, and according to the verification result, the traffic flow information is corrected, and the corrected traffic flow information is output. With such a method and device, it is possible to correct the problem of outputting incorrect traffic flow information due to technical limitations of the floating car data processing system, and improve the accuracy of real-time traffic information for the publication of real-time traffic information.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings may be obtained based on these drawings without paying for creative labor. 1 is a flowchart of a method for processing traffic flow information according to Embodiment 1 of the present invention; FIG. 2 is a flowchart of processing traffic flow information and traffic event information in a data processing cycle of a floating car according to Embodiment 2 of the present invention;

3 is a specific flowchart of checking and processing traffic flow information and traffic event information in a data processing cycle of a floating car according to Embodiment 2 of the present invention;

4 is a block diagram of a device for processing traffic flow information according to Embodiment 3 of the present invention;

FIG. 5 is a block diagram of a check and correction unit in Embodiment 3 of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Embodiment 1

Referring to FIG. 1, a method for processing traffic flow information described in an embodiment of the present invention includes the following steps:

Step 11. Obtain traffic flow information and traffic event information.

The traffic flow information referred to in the embodiment of the present invention is data including roads; road time and road condition descriptions (congestion, slow or unblocked) obtained by analyzing and processing floating car data (FCD).

The floating car data refers to position data uploaded by a vehicle equipped with a positioning device (such as GPS) to a processing unit of the traffic flow information through a certain communication protocol. The communication protocol may be a protocol based on General Packet Radio Service (GPRS) or a protocol based on Code Division Multiple Access (CDMA) technology. The floating car data includes a vehicle ID (identity) number, a time stamp, a latitude and longitude, a direction, a passenger state of the vehicle, and the like. In the process of processing the floating car data uploaded by the floating car, the processing means used by the processing unit include, but is not limited to, using technical means such as map matching and path estimation to obtain traffic flow information including the vehicle; the time of the line and the congestion condition. . Wherein the vehicle; the line time refers to the time required for the vehicle to pass a section of the road. The embodiment of the invention obtains the traffic flow information after processing the floating car data.

The traffic incidents in the embodiments of the present invention are events that cause congestion and/or interruption of road traffic. For example, traffic incidents may be traffic accidents, open circuit construction, road control, and road condition descriptions (including slow road conditions, congestion, and smooth traffic, etc.). .

Further, the traffic event information includes a traffic event occurring within a traffic flow information collection range and a road corresponding to the occurrence of the traffic event.

The specific manner of obtaining traffic event information in the embodiment of the present invention is collected by a device such as a manual or a camera, or may be obtained from a publisher of traffic event information through software or a program.

Step 1 2. Verify the traffic flow information according to the traffic event information, correct the traffic flow information, and output the corrected traffic flow information.

Because the traffic incident information collection path is more reliable, the traffic flow information is used as a benchmark to verify the traffic flow information and the traffic incident information. When the traffic flow information and the traffic event information contain different traffic information, the traffic incident is The information shall prevail, correct the traffic flow information, and output the corrected traffic flow information.

The method for processing traffic flow information adopted by the embodiment of the present invention can correct the problem of outputting wrong traffic flow information due to the technical limitation of the floating car data processing system, and improve the accuracy of the real-time traffic information for the announcement of real-time traffic information. .

Further, the traffic flow information is verified according to the traffic event information mentioned in step 12, and the traffic flow information is corrected, including the following steps:

Step 1 21: Read the traffic event information, obtain a road set in which the traffic event occurs, and search for traffic flow information corresponding to each road in the road set in the traffic flow information. Interest.

Step 1 22: Perform a correction operation on the traffic flow information corresponding to each road in the road set according to the description of the traffic state by the traffic event information.

By reading the traffic event information, finding the road where the traffic event occurs, and then passing the road, the traffic flow information corresponding to the road can be found; wherein the road identifier of one road can be the same in the traffic event information and the traffic flow information. The function of a road in the traffic flow information and the traffic event information can also be established through a function.

Correspondence between traffic event information and traffic flow information is established through the road, and the traffic state is described according to the road traffic event information, and the traffic flow of the road is operated.

The traffic events in the traffic event information set are sequentially read, and the traffic flow information is corrected by using each traffic event information as an information reference.

Further, the description of the traffic state according to the traffic event information mentioned in step 1 22 performs a correcting operation on the traffic flow information corresponding to each road in the road set, including the following cases:

When the traffic event information of the road describes the traffic state as an event that causes the road traffic to be congested, correcting the road condition state of the road in the traffic flow information; when the traffic event information of the road is related to the traffic state Described as an event that causes an interruption in road traffic, the traffic flow information of the road is deleted.

The embodiment of the invention obtains all traffic event information within the scope of traffic flow information collection, sequentially reads the traffic event information, finds the road where the traffic event occurs, and corrects the traffic flow information of the road. The traffic event information is used as a reference to verify the traffic flow information, which improves the calculation efficiency in the verification process and shortens the time of the verification process.

Embodiment 2

The embodiment of the present invention specifically describes the flow of processing traffic flow in a floating car data processing cycle.

The above mentioned floating car data processing cycle refers to the buffering of floating car data. Long, which specifies the real-time floating car data that needs to be accumulated for a long time interval, usually 2-10 minutes.

Embodiments of the present invention include the following steps:

Step 21: Obtain traffic flow information in a current floating car data processing period.

Step 22: Obtain traffic event information in a current floating car data processing period.

More specifically, each road within the traffic flow information collection range can be numbered and coded for traffic events. The information of collecting traffic events may be specifically recorded by the code number and the road number of the traffic event, and at the same time, the information such as the line time and speed may be recorded.

Referring to FIG. 2, further, the embodiment of the present invention specifically describes the implementation steps of the technical solution referred to in steps 121 and 122 of the first embodiment in a floating car data processing cycle. Among them, the above mentioned "floating car data processing cycle" is hereinafter referred to as "period,,.

Step 23: Determine whether all the traffic event information in the current period is processed. If all traffic event information has been processed, go to step 24, otherwise go to step 25.

Step 24. During the current period, the traffic flow information is verified and corrected by the traffic event information.

Step 25: Read one of the traffic event information in the current period to obtain all the road numbers corresponding to the traffic event.

Step 26: Find, according to the road number, traffic flow information corresponding to the road in all traffic flow information in the current period.

Step 27: Determine whether there is traffic flow information corresponding to the road number in all traffic flow information in the current period.

If there is traffic flow information corresponding to the road number, go to step 28, otherwise go to step 23. Step 28: Read a status description of the traffic event information.

The state description of the traffic event information is represented in the embodiment of the present invention as a correspondence to a specific description of the traffic event type as a code number. Classify the traffic incidents and causes of road traffic disruptions and congestions, and describe each traffic event with a code, each code representing a type of traffic event. For example, traffic incidents are classified into traffic accidents, no traffic, entrance ramp closure, open circuit construction, road control, etc. Each category is assigned a code for program analysis.

Step 29. Analyze the state description of the traffic event, verify the traffic flow information, and complete the processing of the current road traffic flow information.

Referring to FIG. 3, step 29 further includes the following steps:

Step 291: Start verifying traffic flow information of the current road;

Step 292: Whether the status description of the current traffic event information is prohibited. If yes, go to step 297, otherwise go to step 293;

Step 293: The status description of the current traffic event information is closed for the entrance ramp. If yes, go to step 297, otherwise go to step 294;

Step 294: Whether the status description of the current traffic event information is an open circuit construction. If yes, go to step 297, otherwise go to step 295;

Step 295: The status of the current traffic event information describes whether it is a traffic accident. If yes, go to step 296, otherwise go to step 298;

Step 296: Correct traffic flow information of the road according to current traffic event information. A traffic accident will change the speed of the road vehicle, making the road condition slow or congested. Generally, the road traffic will not be completely interrupted. Therefore, the traffic flow information of the road section will also exist in the collection of traffic flow information. According to the traffic incident information, the travel time and traffic description (including slow, congested and unblocked) of the traffic flow information are corrected.

Step 297: Delete related data of the current road from the traffic flow information in the current period. If traffic events cause disruption of road traffic, such as no traffic, entrance ramps, and Road construction events can lead to road disruption, then the traffic flow information of the road should not exist in the traffic flow information, so the traffic flow information of the road is deleted. A good correction was made for the output of incorrect traffic flow information due to technical limitations of the floating car data processing system.

The embodiments of the present invention only obtain the most common traffic events such as no-pass, entrance ramp closure, road construction, and traffic accidents as an example to improve data processing efficiency, but the scope of protection of the present invention is not limited to the traffic events mentioned. information. If the accuracy of the traffic flow information is further improved, the traffic event information can be classified more carefully, and the traffic event information occurring in the current cycle can be collected in more detail.

Step 298: Complete traffic flow information correction of a road.

For a case where a traffic event corresponds to multiple roads in one cycle, repeat steps 25 to 298 to complete the traffic flow information correction within the traffic flow information collection range during the entire cycle.

Step 21 0. Complete traffic flow information processing in the current cycle, and output real-time traffic flow information. The traffic flow information that has been verified and corrected is output. The present invention does not limit the output form, and the processed traffic flow information may be published on the relevant website, or may be output through the road indicating device.

In the embodiment of the invention, the traffic events are sequentially read, and the traffic flow information is corrected based on the traffic event information. Taking a typical traffic incident as an example, a detailed explanation of how to correct traffic flow information is given. The embodiment of the invention can correct the problem of outputting the wrong traffic flow information due to the technical limitation of the floating car data processing system, and improves the accuracy of the real-time traffic information of the road for the publication of the real-time traffic information.

Embodiment 3

Referring to FIG. 4, an embodiment of the present invention provides a device 1 for processing traffic flow information, including:

a traffic flow information acquiring unit 2, configured to acquire traffic flow information; a traffic event information acquiring unit 3, configured to acquire traffic event information; and a verification and correction unit 4, configured to The traffic event information is verified by the event information, the traffic flow information is corrected, and the corrected traffic flow information is output.

The traffic flow information referred to in the embodiment of the present invention is data including roads; road time and road condition descriptions (congestion, slow or unblocked) obtained by analyzing and processing floating car data (FCD). The floating car data refers to a vehicle equipped with a positioning device (such as a GPS) to upload location data to a processing unit of the traffic flow information through a certain communication protocol, for example, the communication protocol is based on a general packet radio service technology (GPRS, General Packet). Radio Service) protocol or protocol based on Code Division Multiple Access (CDMA) technology. The floating car data includes a vehicle ID (identity) number, a time stamp, a latitude and longitude, a direction, a passenger state of the vehicle, and the like.

By processing the floating car data uploaded by the floating car, the processing means includes, but is not limited to, using technical means such as map matching and path estimation to obtain traffic flow information including vehicle travel time and congestion status, wherein the travel time refers to the vehicle passing The time required for a section of road. In the embodiment of the present invention, the traffic flow information acquiring unit acquires the traffic flow information after processing the floating car data.

The traffic event information of the embodiment of the present invention may be collected by a manual or a camera, the traffic information acquisition module supports the entry and query of the traffic event information, or the traffic event information acquisition unit may also send the traffic event information to the publisher through the software or the program. Obtain.

Because the traffic incident information collection path is more reliable, the traffic event information is used as a reference, and the verification and correction unit verifies the traffic flow information and the traffic event information, and the traffic flow information and the traffic event information contain different traffic information. When the traffic event information is Correct, correct traffic flow information, and output corrected traffic flow information.

The traffic flow information processing device adopted by the embodiment of the invention can correct the problem of outputting the wrong traffic flow information due to the technical limitation of the floating car data processing system, and improve the accuracy of the real-time traffic information of the road for the publication of the real-time traffic information. .

Further, referring to FIG. 5, the verification and correction unit 4 of the embodiment of the present invention includes: an information correspondence module 41, configured to read the traffic event information, and acquire a road set in which the traffic event occurs, in the traffic Searching, in the flow information, traffic flow information corresponding to each road in the road set; and a check and correction execution module 42 for describing a traffic state according to the traffic event information, for each road in the road set Corresponding traffic flow information performs a correction operation.

Reading the traffic event information through the information corresponding module, finding the road where the traffic event occurs, and then passing the road, the traffic flow information corresponding to the road can be found; wherein the road identifier of one road is in the traffic event information and the traffic flow information It may be the same, and the information corresponding module may also establish a correspondence between a road in the traffic flow information and the traffic event information through a function.

The correspondence between the traffic event information and the traffic flow information is established through the road, and the verification and correction execution module performs the operation on the traffic flow information of the road according to the road traffic event information, and sequentially reads the traffic event information set. Traffic events, using traffic information as a basis for information to correct traffic flow information.

More specifically, referring to FIG. 5, the verification and correction execution module 42 of the embodiment of the present invention includes: a correction sub-module 421, configured to describe the traffic state when the traffic event information of the road is caused to cause road traffic generation. a congested event, wherein the road condition state of the road is corrected in the traffic flow information; and a deletion sub-module 422, configured to describe, when the traffic event information of the road is a traffic state, an event that causes the road traffic to be interrupted, Then the traffic flow information of the road is deleted.

If a traffic incident causes road traffic congestion, for example, the traffic incident is a traffic accident, then pay The accident will change the driving speed of the road vehicle, making the road condition slow or congested, and generally does not cause the road traffic to be completely interrupted. Therefore, the traffic flow information of the road section may also exist in the collection of the traffic flow information. The correction sub-module corrects information such as travel time and road condition description (including slowness, congestion, and smoothness) of the traffic flow information according to the traffic event information.

If a traffic event causes road traffic interruption, such as no traffic, entrance ramp closure and road construction events, the traffic flow information may not be present in the traffic flow information, so the sub-module will be deleted for the road traffic. The stream information is deleted. A good correction was made for the output of incorrect traffic flow information due to technical limitations of the floating car data processing system.

The embodiment of the invention obtains all traffic event information within the traffic flow information collection range, sequentially reads the traffic event information, finds the road where the traffic event occurs, and corrects the traffic flow information of the road. The traffic event information is used as a benchmark to verify the traffic flow information, which improves the calculation efficiency in the verification process and shortens the verification process time.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by hardware or by software plus a necessary general hardware platform. Based on such understanding, the technical solution of the present invention can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (may be

A CD-ROM, a USB flash drive, a removable hard disk, etc., includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the above-described methods of various embodiments of the present invention.

A person skilled in the art can understand that the drawings are only a schematic diagram of a preferred embodiment, and the modules or processes in the accompanying drawings are not necessarily required to implement the invention.

Those skilled in the art can understand that the modules in the apparatus in the embodiments may be distributed in the apparatus of the embodiment according to the description of the embodiments, or the corresponding changes may be located in one or more apparatuses different from the embodiment. The modules of the above embodiments may be combined into one module, or may be further split into multiple sub-modules. The serial numbers of the embodiments of the present invention are merely for the description, and do not represent the advantages and disadvantages of the embodiments. The above disclosure is only a few specific embodiments of the present invention, but the present invention is not limited thereto, and any changes that can be made by those skilled in the art should fall within the protection scope of the present invention.

Claims

Claim

A method for processing traffic flow information, comprising:

Obtain traffic flow information and traffic event information;

2. The method for processing traffic flow information according to claim 1, wherein: the traffic event information comprises a traffic event occurring within a traffic flow information collection range and a road corresponding to the occurrence of the traffic event; wherein the traffic An event is an event that causes congestion and/or disruption of road traffic.

A method of processing traffic flow information according to claim 1, wherein: said traffic flow information includes data including a road travel time and a road condition description obtained by processing the floating car data.

The method for processing traffic flow information according to claim 1, wherein the verifying the traffic flow information according to the traffic event information, and modifying the traffic flow information comprises:

Reading the traffic event information, obtaining a road set in which the traffic event occurs, and searching, in the traffic flow information, traffic flow information corresponding to each road in the road set;

Determining the traffic flow information corresponding to each road in the road set according to the description of the traffic state by the traffic event information.

The method for processing traffic flow information according to claim 4, wherein the describing the traffic state according to the traffic event information, and performing correction on traffic flow information corresponding to each road in the road set Operation, including:

When the traffic event information of the road describes the traffic state as an event that causes the road traffic to be congested, the road state of the road is corrected in the traffic flow information.

When the traffic event information of the road describes the traffic state as an event that causes the road traffic to be interrupted, the traffic flow information of the road is deleted.

7. A device for processing traffic flow information, comprising: a traffic flow information acquiring unit, configured to acquire traffic flow information;

8. The traffic flow information processing apparatus according to claim 7, wherein: the traffic event information includes a traffic event occurring within a traffic flow information collection range and a road corresponding to the occurrence of the traffic event; wherein the traffic An event is an event that causes congestion and/or disruption of road traffic.

A traffic flow information processing apparatus according to claim 7, wherein: ???said traffic flow information includes data including road travel time and road condition description obtained by processing the floating car data.

The device for processing traffic flow information according to claim 7, wherein the verification and correction unit comprises:

And an information corresponding module, configured to read the traffic event information, obtain a road set in which the traffic event occurs, and search, in the traffic flow information, traffic flow information corresponding to each road in the road set;

And a verification and correction execution module, configured to perform a correction operation on the traffic flow information corresponding to each road in the road set according to the description of the traffic state according to the traffic event information.

1 . The device for processing traffic flow information according to claim 10, wherein the verification and correction execution module comprises:

And a correction submodule, configured to modify a road state of the road in the traffic flow information when the traffic event information of the road describes the traffic state as an event that causes the road traffic to be congested.

The apparatus for processing traffic flow information according to claim 10, wherein the verification and correction execution module comprises:

And deleting the sub-module, wherein when the traffic event information of the road describes the traffic state as an event that causes the road traffic to be interrupted, the traffic flow information of the road is deleted.