WO2011147101A1 - Vehicle position estimation method in traffic road network - Google Patents
Vehicle position estimation method in traffic road network Download PDFInfo
- Publication number
- WO2011147101A1 WO2011147101A1 PCT/CN2010/073363 CN2010073363W WO2011147101A1 WO 2011147101 A1 WO2011147101 A1 WO 2011147101A1 CN 2010073363 W CN2010073363 W CN 2010073363W WO 2011147101 A1 WO2011147101 A1 WO 2011147101A1
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- WO
- WIPO (PCT)
- Prior art keywords
- road network
- traffic road
- vehicle
- data collection
- collection module
- Prior art date
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
Definitions
- the present invention relates to a vehicle position estimation method, and more particularly to a vehicle position estimation method in a traffic road network.
- a technology of acquiring traffic information by using a mobile phone is newly developed, so as to perform real-time traffic monitoring.
- positions of the mobile phone in a traffic road network are tracked continually through various mobile positioning technologies, and the continual positions of the mobile phone can be treated as samples for estimating traffic flow information.
- the positions of the mobile phone (i.e., the samples) acquired through the current positioning technologies are inaccurate, especially in the case that radio propagation paths are uncertain and complex due to shadow, reflection, diffraction, and multipath effects, and the sample positions for estimating traffic flow information are even more inaccurate. That is to say, the sample positions vary in a certain range.
- Such inaccuracy and unreliability of the samples greatly influence the accuracy of estimation of traffic flow information.
- a traffic flow is estimated mainly by using history data, for example, the influence caused by inaccurate and unreliable real-time samples is reduced by using data such as history traffic speed situation and history sample position information.
- the method of estimating position information of traffic vehicles and then estimating the traffic flow by using history data has not been proved to be more effective and accurate. Therefore, using a more accurate vehicle position estimation method for estimating vehicles in the traffic road network has become an urgent task.
- the present invention is mainly directed to a vehicle position estimation method in a traffic road network, which is capable of more accurately estimating vehicle positions in the traffic road network.
- the present invention provides a vehicle position estimation method in a traffic road network.
- the traffic road network includes a backbone network, more than one base station, and more than one vehicle.
- Each of the vehicles is provided with at least one mobile station.
- the base stations are connected to the backbone network.
- the method includes the following steps.
- At least one data collection module receives a signal from the base station, and sends the signal to a data processing server, and a position relation between the data collection module and the preset switching position is determined.
- the preset switching position is a mean position in an overlapping area of two adjacent cells.
- the signal received by the data collection module from the base station is a received signal strength indicator (RSSI) sent by the base station.
- RSSI received signal strength indicator
- the data processing server according to the received signal and the position relation, first estimates a condition of a radio propagation environment and then estimates the actual switching position of the vehicle through a correction module.
- the data collection module is disposed close to a road near the traffic road network.
- the data collection module is disposed at a position in an overlapping area of two adjacent cells.
- the present invention further provides a vehicle position estimation device in a traffic road network.
- the traffic road network includes a backbone network, more than one base station, and more than one vehicle. Each of the vehicles is provided with at least one mobile station.
- the base stations are connected to the backbone network.
- the device includes a data collection module, a presetting module, and a data processing server.
- the data collection module is used for receiving a signal from the base station.
- the presetting module is used for determining a preset switching position between adjacent base stations, and determining a position relation between the data collection module and the preset switching position.
- the data processing server is used for estimating an actual switching position of the vehicle according to the received signal and the position relation.
- the presetting module is disposed in the backbone network.
- the data processing server is disposed in the backbone network.
- FIG. 1 is a flow chart of a vehicle position estimation method in a traffic road network according to the present invention.
- the traffic road network includes a backbone network, multiple base stations, and several vehicles. Each of the vehicles is provided with a mobile station. The base stations are connected to the backbone network.
- FIG. 1 is a flow chart of the vehicle position estimation method in the traffic road network in the present invention. The specific implementation steps thereof are as follows.
- the preset switching position is usually an ideal switching position, for example, a central position in an overlapping area of two adjacent cells, which is also referred to as an average switching position.
- the preset switching position is notified to a data processing server through the base station.
- the data processing server is usually located in the backbone network.
- one or more data collection modules are disposed in the traffic road network.
- the data collection modules are disposed close to a road near the traffic road network.
- the data collection module receives signals from all the base stations in the road network and sends the signals to the data processing server. Meanwhile, a position relation between the data collection module and each of the preset switching positions is determined.
- a data collection module is disposed between every two adjacent cells in the road network, preferably, at a position in an overlapping area of the two adjacent cells, the data collection module receives signals from the base stations in the two cells and sends the signals to the data processing server. Meanwhile, a position relation between each of the data collection modules and the preset switching position between the two adjacent cells is determined.
- the signal received by the data collection module from the base station is an RSSI sent out by the base station.
- the data processing server estimates actual switching positions of the vehicles according to the received signals and the position relations.
- the data processing server first estimates a condition of a radio propagation environment, and then adjusts the actual switching positions of the vehicles through a correction module.
- the present invention further provides a vehicle position estimation device in a traffic road network.
- the traffic road network includes a backbone network, more than one base station, and more than one vehicle. Each of the vehicles is provided with at least one mobile station.
- the base stations are connected to the backbone network.
- the device includes a data collection module, a presetting module, and a data processing server.
- the presetting module and the data processing server are disposed in the backbone network.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Traffic Control Systems (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
A vehicle position estimation method in a traffic road network is provided. The traffic road network includes a backbone network, more than one base station, and more than one vehicle. Each of the vehicles is provided with at least one mobile station. The base stations are connected to the backbone network. The method includes: (1) determining a preset switching position between adjacent base stations; (2) receiving a signal by at least one data collection module from the base station and sending the signal to a data processing server, and meanwhile determining a position relation between the data collection module and the preset switching position; and (3) estimating an actual switching position of the vehicle by the data processing server according to the received signal and the position relation.
Description
VEHICLE POSITION ESTIMATION METHOD IN TRAFFIC ROAD
NETWORK
BACKGROUND OF THE INVENTION
Field of Invention The present invention relates to a vehicle position estimation method, and more particularly to a vehicle position estimation method in a traffic road network.
Related Art
In a mobile communication system, a technology of acquiring traffic information by using a mobile phone is newly developed, so as to perform real-time traffic monitoring. In the technology, positions of the mobile phone in a traffic road network are tracked continually through various mobile positioning technologies, and the continual positions of the mobile phone can be treated as samples for estimating traffic flow information.
However, the positions of the mobile phone (i.e., the samples) acquired through the current positioning technologies are inaccurate, especially in the case that radio propagation paths are uncertain and complex due to shadow, reflection, diffraction, and multipath effects, and the sample positions for estimating traffic flow information are even more inaccurate. That is to say, the sample positions vary in a certain range. Such inaccuracy and unreliability of the samples greatly influence the accuracy of estimation of traffic flow information. In the prior art, a traffic flow is estimated mainly by using history data, for example, the influence caused by inaccurate and unreliable real-time samples is reduced by using data such as history traffic speed situation and history sample position information. However, the method of estimating position information of traffic vehicles and then estimating the traffic flow by using history data has not been proved to be more effective and accurate.
Therefore, using a more accurate vehicle position estimation method for estimating vehicles in the traffic road network has become an urgent task.
SUMMARY OF THE INVENTION
The present invention is mainly directed to a vehicle position estimation method in a traffic road network, which is capable of more accurately estimating vehicle positions in the traffic road network.
In order to achieve the above objective, the present invention provides a vehicle position estimation method in a traffic road network. The traffic road network includes a backbone network, more than one base station, and more than one vehicle. Each of the vehicles is provided with at least one mobile station. The base stations are connected to the backbone network. The method includes the following steps.
(1) A preset switching position between adjacent base stations is determined.
(2) At least one data collection module receives a signal from the base station, and sends the signal to a data processing server, and a position relation between the data collection module and the preset switching position is determined.
(3) The data processing server estimates an actual switching position of the vehicle according to the received signal and the position relation.
Preferably, in Step (1), the preset switching position is a mean position in an overlapping area of two adjacent cells. Preferably, in Step (2), the signal received by the data collection module from the base station is a received signal strength indicator (RSSI) sent by the base station.
Preferably, in Step (3), the data processing server, according to the received signal and the position relation, first estimates a condition of a radio propagation environment and then estimates the actual switching position of the vehicle through a correction module.
Preferably, the data collection module is disposed close to a road near the traffic road network.
Preferably, the data collection module is disposed at a position in an overlapping area of two adjacent cells. Correspondingly, the present invention further provides a vehicle position estimation device in a traffic road network. The traffic road network includes a backbone network, more than one base station, and more than one vehicle. Each of the vehicles is provided with at least one mobile station. The base stations are connected to the backbone network. The device includes a data collection module, a presetting module, and a data processing server.
The data collection module is used for receiving a signal from the base station.
The presetting module is used for determining a preset switching position between adjacent base stations, and determining a position relation between the data collection module and the preset switching position. The data processing server is used for estimating an actual switching position of the vehicle according to the received signal and the position relation.
Preferably, the data collection module is disposed close to a road near the traffic road network.
Preferably, the presetting module is disposed in the backbone network. Preferably, the data processing server is disposed in the backbone network.
The present invention provides a simple vehicle position estimation method in a traffic road network, which enables more accurate determination of accurate positions of a vehicle during switching in the traffic road network, so as to judge a traffic flow of the traffic road network according to the accurate positions of the vehicle.
BRIEF DESCRIPTION OF THE DRAWINGS
The specific implementations of the present invention are described in detail further below with reference to the accompanying drawing, wherein:
FIG. 1 is a flow chart of a vehicle position estimation method in a traffic road network according to the present invention.
DETAILED DESCRIPTION OF THE INVENTION
In the following embodiments, a vehicle position estimation method in a traffic road network in the present invention is illustrated in detail.
The traffic road network includes a backbone network, multiple base stations, and several vehicles. Each of the vehicles is provided with a mobile station. The base stations are connected to the backbone network. FIG. 1 is a flow chart of the vehicle position estimation method in the traffic road network in the present invention. The specific implementation steps thereof are as follows.
First, a preset switching position between adjacent base stations needs to be determined. The preset switching position is usually an ideal switching position, for example, a central position in an overlapping area of two adjacent cells, which is also referred to as an average switching position. After being determined, the preset switching position is notified to a data processing server through the base station. The data processing server is usually located in the backbone network. Next, one or more data collection modules are disposed in the traffic road network.
The data collection modules are disposed close to a road near the traffic road network.
In the case that one data collection module is disposed, the data collection module receives signals from all the base stations in the road network and sends the signals to the data processing server. Meanwhile, a position relation between the data collection module
and each of the preset switching positions is determined.
In the case that multiple data collection modules are disposed, for example, a data collection module is disposed between every two adjacent cells in the road network, preferably, at a position in an overlapping area of the two adjacent cells, the data collection module receives signals from the base stations in the two cells and sends the signals to the data processing server. Meanwhile, a position relation between each of the data collection modules and the preset switching position between the two adjacent cells is determined.
Usually, the signal received by the data collection module from the base station is an RSSI sent out by the base station. Then, the data processing server estimates actual switching positions of the vehicles according to the received signals and the position relations. In fact, according to the received signals and the position relations, the data processing server first estimates a condition of a radio propagation environment, and then adjusts the actual switching positions of the vehicles through a correction module. The present invention further provides a vehicle position estimation device in a traffic road network. The traffic road network includes a backbone network, more than one base station, and more than one vehicle. Each of the vehicles is provided with at least one mobile station. The base stations are connected to the backbone network. The device includes a data collection module, a presetting module, and a data processing server. The data collection module is used for receiving a signal from the base station. The presetting module is used for determining a preset switching position between adjacent base stations, and determining a position relation between the data collection module and the preset switching position. The data processing server is used for estimating an actual switching position of the vehicle according to the received signal and the position relation. The data collection module is disposed close to a road near the traffic road network.
The presetting module and the data processing server are disposed in the backbone network.
The above descriptions are merely preferred embodiments of the present invention. It should be noted that persons of ordinary skill in the art can make modifications and improvements without departing from the principle of the present invention, which also fall within the protection scope of the present invention.
Claims
1. A vehicle position estimation method in a traffic road network, wherein the traffic road network comprises a backbone network, more than one base station, and more than one vehicle, each of the vehicles is provided with at least one mobile station, and the base stations are connected to the backbone network, characterized in that the method comprising:
(1) determining a preset switching position between adjacent base stations;
(2) receiving a signal by at least one data collection module from the base station and sending the signal to a data processing server, and determining a position relation between the data collection module and the preset switching position; and
(3) estimating an actual switching position of the vehicle by the data processing server according to the received signal and the position relation.
2. The vehicle position estimation method in a traffic road network according to claim 1, wherein in Step (1), the preset switching position is an average position in an overlapping area of two adjacent cells.
3. The vehicle position estimation method in a traffic road network according to claim 1, wherein in Step (2), the signal received by the data collection module from the base station is a received signal strength indicator (RSSI) sent by the base station.
4. The vehicle position estimation method in a traffic road network according to claim 1, wherein in Step (3), the data processing server, according to the received signal and the position relation, first estimates a condition of a radio propagation environment and then estimates the actual switching position of the vehicle through a correction module.
5. The vehicle position estimation method in a traffic road network according to claim 1, wherein the data collection module is disposed close to a road near the traffic road network.
6. The vehicle position estimation method in a traffic road network according to claim 5, wherein the data collection module is disposed at a position in an overlapping area of two adjacent cells.
7. A vehicle position estimation device in a traffic road network, wherein the traffic road network comprises a backbone network, more than one base station, and more than one vehicle, each of the vehicles is provided with at least one mobile station, and the base stations are connected to the backbone network, characterized in that the device comprising: a data collection module, for receiving a signal from the base station; a presetting module, for determining a preset switching position between adjacent base stations, and determining a position relation between the data collection module and the preset switching position; and a data processing server, for estimating an actual switching position of the vehicle according to the received signal and the position relation.
8. The vehicle position estimation device in a traffic road network according to claim 7, wherein the data collection module is disposed close to a road near the traffic road network.
9. The vehicle position estimation device in a traffic road network according to claim 7, wherein the presetting module is disposed in the backbone network.
10. The vehicle position estimation device in a traffic road network according to claim 7, wherein the data processing server is disposed in the backbone network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2010/073363 WO2011147101A1 (en) | 2010-05-28 | 2010-05-28 | Vehicle position estimation method in traffic road network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2010/073363 WO2011147101A1 (en) | 2010-05-28 | 2010-05-28 | Vehicle position estimation method in traffic road network |
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| WO2011147101A1 true WO2011147101A1 (en) | 2011-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2010/073363 WO2011147101A1 (en) | 2010-05-28 | 2010-05-28 | Vehicle position estimation method in traffic road network |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117218580A (en) * | 2023-09-13 | 2023-12-12 | 杭州像素元科技有限公司 | Expressway cross-camera multi-vehicle tracking method and system combining multiple models |
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| CN101000717A (en) * | 2006-01-13 | 2007-07-18 | 朗迅科技公司 | Integral access of traffic control information based on road with geographic location data |
| JP2008244590A (en) * | 2007-03-26 | 2008-10-09 | Nec Corp | Portable terminal device with automatic silent mode, method thereof and program thereof |
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2010
- 2010-05-28 WO PCT/CN2010/073363 patent/WO2011147101A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20060258367A1 (en) * | 2005-05-16 | 2006-11-16 | Chiang Tung C | Using cell phones and wireless cellular systems with location capability for toll paying and collection |
| CN101000717A (en) * | 2006-01-13 | 2007-07-18 | 朗迅科技公司 | Integral access of traffic control information based on road with geographic location data |
| JP2008244590A (en) * | 2007-03-26 | 2008-10-09 | Nec Corp | Portable terminal device with automatic silent mode, method thereof and program thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117218580A (en) * | 2023-09-13 | 2023-12-12 | 杭州像素元科技有限公司 | Expressway cross-camera multi-vehicle tracking method and system combining multiple models |
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