CN105590467A - Road condition information acquisition method and device - Google Patents
Road condition information acquisition method and device Download PDFInfo
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- CN105590467A CN105590467A CN201510721347.XA CN201510721347A CN105590467A CN 105590467 A CN105590467 A CN 105590467A CN 201510721347 A CN201510721347 A CN 201510721347A CN 105590467 A CN105590467 A CN 105590467A
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Abstract
The present invention provides a road condition information acquisition method and device. The road condition information acquisition method and device are applied on a vehicle terminal, and the vehicle terminal works in a point-to-point communication mode. The method comprises: receiving vehicle information, wherein the vehicle information includes the MAC address containing the vehicle terminal; determining whether the MAC address included in the received vehicle information is the same as the MAC address itself or not; when the MAC address included in the received vehicle information is not the same as the MAC address itself, forwarding and recording the received vehicle information; generating a vehicle connection topology structure according to the recorded vehicle information; and calculating the current road condition according to the vehicle connection topology structure. The road condition information acquisition method and device solve the road condition update problem of a non-wide area wireless network coverage area and provide an effective and safe driving environment for drivers.
Description
Technical field
The application relates to network communications technology field, relates in particular to a kind of traffic information acquisition methods and device.
Background technology
For numerous car owners, obtain in time traffic information particularly important, car owner can be according to the road obtainingCondition information is avoided the section that blocks up in advance, and select preferably road driving of road conditions, thereby save time cost,Improve the service efficiency of road and vehicle.
Existing traffic information obtain manner generally adopt GPS (GlobalPositioningSystem, completeBall navigation system) mode of+wide-area, wireless network realizes. Be that vehicle goes out this car by GPS location CalculationAfter the information such as position, speed, direction, by wide-area, wireless network, above-mentioned information is sent to electronic chart numberAccording to center; The information that electronic map data center is responsible for reporting according to all vehicles is calculated the finger that blocks up of roadNumber, then the index that blocks up in each section is sent to each vehicle by wide-area, wireless network, thus complete eachThe traffic information of vehicle obtains.
But this technical scheme depends on the coverage of wide-area, wireless network, when Vehicle Driving Cycle is to wide-area wirelessNet signal do not cover local time, cannot carry out information interaction with electronic map data center, therefore,Also just cannot get traffic information.
Summary of the invention
In view of this, the application provides a kind of traffic information acquisition methods and device.
Particularly, the application is achieved by the following technical solution:
The application provides a kind of traffic information acquisition methods, is applied on car-mounted terminal, and the method comprises:
Receive information of vehicles, the MAC Address that described information of vehicles comprises car-mounted terminal;
Judge the described MAC Address that comprises of information of vehicles that receives whether with self MAC Address phaseWith;
When the described MAC Address that the information of vehicles of described reception comprises different from the MAC Address of selfTime, forward and record the information of vehicles receiving;
Generate vehicle according to the information of vehicles of record and connect topological structure;
Connect topological structure according to described vehicle and calculate current road conditions.
The application also provides a kind of traffic information acquisition device, is applied on car-mounted terminal, and this device comprises:
Receiving element, for receiving information of vehicles, the MAC ground that described information of vehicles comprises car-mounted terminalLocation;
Judging unit, for judge described MAC Address that the information of vehicles of reception comprises whether with selfMAC Address identical;
Record cell, for the described MAC Address that comprises when the information of vehicles of described reception and selfWhen MAC Address is different, forward and record the information of vehicles receiving;
Generation unit, connects topological structure for generating vehicle according to the information of vehicles of record;
Computing unit, calculates current road conditions for connecting topological structure according to described vehicle.
Can be found out by above description, the application forwards by the information between vehicle and vehicle, makes eachIndividual vehicle can get the information of vehicles of other vehicle, thereby completes voluntarily the calculating of traffic information.Solve the road condition updating problem without wide-area, wireless network overlay area, for human pilot provides efficiently, pacifiedFull driving environment.
Brief description of the drawings
Fig. 1 is a kind of traffic information acquisition methods flow chart shown in the application's one exemplary embodiment;
Fig. 2 is a kind of traffic information acquisition device place equipment shown in the application's one exemplary embodimentUnderlying hardware structural representation;
Fig. 3 is the structural representation of a kind of traffic information acquisition device shown in the application's one exemplary embodimentFigure.
Detailed description of the invention
Here will at length describe exemplary embodiment, its sample table shows in the accompanying drawings. BelowWhen description relates to accompanying drawing, unless separately there is expression, the same numbers in different accompanying drawings represents same or analogousKey element. Embodiment described in following exemplary embodiment does not represent the institute consistent with the applicationThere is embodiment. On the contrary, they be only with as in appended claims, described in detail, the application oneThe example of the consistent apparatus and method in a little aspects.
Be only for describing the object of specific embodiment at term used in this application, but not be intended to restrictionThe application. " one ", " institute of the singulative using in the application and appended claimsState " and " being somebody's turn to do " be also intended to comprise most forms, unless context clearly represents other implications. Also shouldWork as understanding, term "and/or" used herein refer to and comprise one or more be associated list itemAny or all may combine object.
Although should be appreciated that may to adopt term first, second, third, etc. to describe in the application variousInformation, but these information should not be limited to these terms. These terms be only used for by the information of same type thatThis distinguishes. For example, in the situation that not departing from the application's scope, the first information also can be called asTwo information, similarly, the second information also can be called as the first information. Depend on linguistic context, as in this instituteUse word " if " can be construed as into " ... time " or " when ... time " or " responseIn determining ".
For numerous car owners, obtain in time traffic information particularly important, car owner can be according to the road obtainingCondition information is avoided the section that blocks up in advance, and select preferably road driving of road conditions, thereby save time cost,Improve the service efficiency of road and vehicle.
At present, various electronic charts all provide traffic information function, and its universal principle is: vehicle receives GPSSatellite-signal, calculates when information such as the position of vehicle in front, speed, directions according to gps satellite signal, thenFor example, by wide-area, wireless network (, 2G, 3G, 4G radio data network) above-mentioned information is uploaded to electricitySub-map datum center; The information meters such as position that data center reports according to all vehicles, speed, directionCalculate the index that blocks up in each section, and by wide-area, wireless network, the index that blocks up calculating is sent to each vehicle;The electronic chart of each vehicle shows congestion in road feelings after applying the index that blocks up that receives each section on mapCondition.
But the coverage of wide-area, wireless network signal is depended in the realization of this technical scheme, when vehicle capableWhile sailing the place that do not cover at wide-area, wireless network signal (as, mountain area etc.), cannot with electronic chart numberCarry out information interaction according to center, therefore, cannot obtain traffic information.
For the problems referred to above, the embodiment of the present application proposes a kind of traffic information acquisition methods, and the method no longerNeed to rely on wide-area, wireless network, but directly forward by the information between vehicle and vehicle, make eachVehicle can get the information of other vehicle, thereby calculates voluntarily required traffic information.
Referring to Fig. 1, be an embodiment flow chart of the application's traffic information acquisition methods, this embodimentProcess to road conditions acquisition of information is described.
Step 101, receives information of vehicles, the MAC Address that described information of vehicles comprises car-mounted terminal.
In the embodiment of the present application, car-mounted terminal can be the terminal device being fixedly installed on vehicle, also canThe mobile device that driver uses, for example, mobile phone etc. As previously mentioned, vehicle can pass through GPS meritCan receive the gps signal of satellite launch, and according to this gps signal calculate this vehicle position, speed,The information of vehicles such as travel direction.
Car-mounted terminal obtains the above-mentioned information of vehicles calculating, and records and forward this information of vehicles. Wherein,The forwarding of information of vehicles can adopt point-to-point communication pattern to forward. For example, enabling WiFiOn the car-mounted terminal of (Wireless-Fidelity, Wireless Fidelity) function, Ad-Hoc (point-to-point) is setPattern, now, car-mounted terminal does not need to rely on other intermediate equipment, for example, AP (AccessPoint,WAP), base station etc., can be directly and the car-mounted terminal of other vehicle communicate. Vehicle letterBreath changes along with the variation of traveling state of vehicle, and therefore, car-mounted terminal can periodically obtain, record alsoForward vehicle information.
Car-mounted terminal send information of vehicles in also comprise self MAC (MediaAccessControl,Medium access control) address. So, in the time that car-mounted terminal receives the information of vehicles of other vehicle transmission,Can from information of vehicles, get the MAC Address of the car-mounted terminal of other vehicle.
Step 102, judge the described MAC Address that comprises of information of vehicles that receives whether with selfMAC Address is identical.
In step 101, mention, car-mounted terminal is operated under Ad-Hoc pattern, the car under this patternMounted terminal all has message repeating ability, and the information of vehicles that this car-mounted terminal sends may be vehicle-mounted by otherAfter terminal receives, forward, therefore, car-mounted terminal is receiving after information of vehicles, can judge this vehicleWhether the MAC Address that packets of information contains is identical with the MAC Address of self, carries out difference according to judged resultProcessing.
Step 103, the described MAC Address comprising when the information of vehicles of described reception and the MAC of selfWhen address is different, forward and record the information of vehicles receiving.
In the time that the MAC Address that comprises of information of vehicles receiving is identical with self MAC Address, explanationCurrent reception be that other car-mounted terminal forwards the information of vehicles that this car-mounted terminal of returning sends, therefore,Can not make subsequent treatment, directly abandon this information of vehicles.
In the time that the MAC Address that comprises of information of vehicles receiving is different from self MAC Address, explanationCurrent reception be the information of vehicles of other vehicle, now, need to forward this information of vehicles,The multi-hop characteristic of utilizing Ad-Hoc pattern constantly to external diffusion, makes both to make distance by information of vehiclesVehicle far away also can get this information of vehicles.
Car-mounted terminal is in forwarding information of vehicles, at the information of vehicles of local record reception.Be specially, in the information of vehicles that judgement has been recorded, whether have the first information of vehicles, this first information of vehiclesThe MAC Address comprising is identical with the MAC Address that the information of vehicles of reception comprises. Divide according to judged resultTwo kinds of situations are processed below:
In the time there is not the first information of vehicles in the information of vehicles having recorded, the vehicle letter of current reception is described(MAC Address of the car-mounted terminal of each car is unique for the information of vehicles that breath is the new car that receives firstIdentify corresponding vehicle), now, record the information of vehicles of this reception.
In the time there is the first information of vehicles in the information of vehicles having recorded, the information of vehicles of current reception is describedFor the information of vehicles of registration of vehicle, now, utilize the information of vehicles receiving to replace the first information of vehicles,To record the last state of this vehicle.
Step 104, generates vehicle according to the information of vehicles of record and connects topological structure.
In this step, car-mounted terminal obtains the vehicle position information of vehicle from the information of vehicles having recorded,And generate and reflect that the vehicle of vehicle relative position relation connects topological structure according to vehicle position information.
Step 105, connects topological structure according to described vehicle and calculates current road conditions.
Be specially, obtain between the road conditions Statistical Area of dividing in advance, connect topological structure according to vehicle and obtain positionThe information of vehicles of the vehicle in this road conditions Statistical Area, the speed that this information of vehicles comprises vehicle. CalculateThe average speed of vehicle in this road conditions Statistical Area.
After the average speed calculating in current road conditions Statistical Area, obtain the speed of default various road conditionsDegree threshold value is the road conditions-speed table of comparisons shown in an exemplary embodiment referring to table 1.
| Road conditions classification | Threshold speed |
| Unimpeded | 60km/h |
| Moderate is blocked up | 40km/h |
| Seriously block up | 20km/h |
Table 1
Average speed between the road conditions Statistical Area calculating and default threshold speed are compared, according toComparative result is determined the road conditions between this road conditions Statistical Area. For example, suppose average between current road conditions Statistical AreaSpeed is 15km/h, compares known this average speed 15km/h with the each threshold speed in table 1Be less than threshold speed 20km/h, therefore, the road conditions between current road conditions Statistical Area are for seriously blocking up.
By above-mentioned computational methods, car-mounted terminal can obtain the road conditions between each road conditions Statistical Area, and thenAt the demonstration screen display road congestion conditions of car-mounted terminal.
Can be found out by foregoing description, the application is not subject to the impact of wide-area, wireless network coverage, is not havingIn the situation of wide-area, wireless network, still can realize the renewal of traffic information.
Corresponding with the embodiment of aforementioned traffic information acquisition methods, the application also provides traffic information to obtainGet the embodiment of device.
The embodiment of the application's traffic information acquisition device can be applied on car-mounted terminal. Device embodimentCan realize by software, also can realize by the mode of hardware or software and hardware combining. Real with softwareBeing now example, as the device on a logical meaning, is the processor operation storage by its place equipmentIn device, corresponding computer program instructions forms. Saying from hardware view, as shown in Figure 2, is this ShenA kind of hardware structure diagram that please traffic information acquisition device place equipment, except the processor shown in Fig. 2,Outside network interface and memory, in embodiment, install the equipment at place conventionally according to the reality of this equipmentBorder function, can also comprise other hardware, and this is repeated no more.
Please refer to Fig. 3, is the structural representation of the traffic information acquisition device in embodiment of the application.This traffic information acquisition device comprises receiving element 301, judging unit 302, record cell 303, generatesUnit 304 and computing unit 305, wherein:
Receiving element 301, for receiving information of vehicles, the MAC that described information of vehicles comprises car-mounted terminalAddress;
Judging unit 302, for judge described MAC Address that the information of vehicles of reception comprises whether with fromThe MAC Address of body is identical;
Record cell 303, for the described MAC Address that comprises when the information of vehicles of described reception and selfMAC Address when different, forwards and records the information of vehicles of reception;
Generation unit 304, connects topological structure for generating vehicle according to the information of vehicles of record;
Computing unit 305, calculates current road conditions for connecting topological structure according to described vehicle.
Further, described device also comprises:
Processing unit, for periodically obtaining the information of vehicles of self; The car of self described in recording and forwardingInformation.
Further,
Whether described record cell 303, there is first car in the information of vehicles having recorded specifically for judgementInformation, the MAC Address that described the first information of vehicles comprises and the information of vehicles of described reception compriseMAC Address is identical; In the time there is not described the first information of vehicles in the described information of vehicles having recorded, noteRecord the information of vehicles of described reception; When there being described the first information of vehicles in the described information of vehicles having recordedTime, utilize the information of vehicles of described reception to replace described the first information of vehicles.
Further,
Described generation unit 304, specifically for obtaining vehicle position information from the information of vehicles having recorded;Generate described vehicle according to described vehicle position information and connect topological structure.
Further,
Described computing unit 305, specifically for obtaining between the road conditions Statistical Area of dividing in advance; According to describedVehicle connects topological structure and obtains the information of vehicles that is positioned at the vehicle between described road conditions Statistical Area, described carPackets of information is containing the speed of vehicle; Calculate the average speed of the vehicle in described road conditions Statistical Area; ObtainThe threshold speed of default various road conditions; By the average speed between described road conditions Statistical Area and described various roadThe threshold speed of condition compares; Determine the road conditions between described road conditions Statistical Area according to comparative result.
In said apparatus, the implementation procedure of the function and efficacy of unit specifically refers in said method correspondingThe implementation procedure of step, does not repeat them here.
For device embodiment, because it corresponds essentially to embodiment of the method, so relevant part ginsengSee the part explanation of embodiment of the method. Device embodiment described above is only schematically,The wherein said unit as separating component explanation can or can not be also physically to separate, and doesThe parts that show for unit can be or can not be also physical locations, can be positioned at a place,Or also can be distributed on multiple NEs. Can select according to the actual needs part wherein orThe whole modules of person realize the object of the application's scheme. Those of ordinary skill in the art are not paying creativenessIn the situation of work, be appreciated that and implement.
The foregoing is only the application's preferred embodiment, not in order to limit the application, all at thisWithin the spirit and principle of application, any amendment of making, be equal to replacement, improvement etc., all should be included inWithin the scope of the application's protection.
Claims (10)
1. a traffic information acquisition methods, is applied on car-mounted terminal, it is characterized in that, described vehicle-mountedTerminal works is under point-to-point communication pattern, and the method comprises:
Receive information of vehicles, the MAC Address that described information of vehicles comprises car-mounted terminal;
Judge that whether the described MAC Address that comprises of information of vehicles receiving is identical with the MAC Address of self;
When the described MAC Address comprising when the information of vehicles of described reception is different from self MAC Address,Forward and record the information of vehicles receiving;
Generate vehicle according to the information of vehicles of record and connect topological structure;
Connect topological structure according to described vehicle and calculate current road conditions.
2. the method for claim 1, is characterized in that, described method also comprises:
Periodically obtain the information of vehicles of self;
The information of vehicles of self described in recording and forwarding.
3. the method for claim 1, is characterized in that, the information of vehicles that described record receives,Comprise:
In the information of vehicles that judgement has been recorded, whether there is the first information of vehicles, described the first information of vehicles bagThe MAC Address containing is identical with the MAC Address that the information of vehicles of described reception comprises;
In the time there is not described the first information of vehicles in the described information of vehicles having recorded, record described receptionInformation of vehicles;
When there is described the first information of vehicles in the described information of vehicles having recorded, utilize described receptionInformation of vehicles replaces described the first information of vehicles.
4. the method for claim 1, is characterized in that, described raw according to the information of vehicles of recordBecome vehicle to connect topological structure, comprising:
From the information of vehicles having recorded, obtain vehicle position information;
Generate described vehicle according to described vehicle position information and connect topological structure.
5. the method for claim 1, is characterized in that, described according to described vehicle connection topologyThe current road conditions of Structure Calculation, comprising:
Obtain between the road conditions Statistical Area of dividing in advance;
Connect topological structure according to described vehicle and obtain the vehicle that is positioned at the vehicle between described road conditions Statistical AreaInformation, the speed that described information of vehicles comprises vehicle;
Calculate the average speed of the vehicle in described road conditions Statistical Area;
Obtain the threshold speed of default various road conditions;
Average speed between described road conditions Statistical Area and the threshold speed of described various road conditions are compared;
Determine the road conditions between described road conditions Statistical Area according to comparative result.
6. a traffic information acquisition device, is applied on car-mounted terminal, it is characterized in that, described vehicle-mountedTerminal works is under point-to-point communication pattern, and this device comprises:
Receiving element, for receiving information of vehicles, the MAC ground that described information of vehicles comprises car-mounted terminalLocation;
Judging unit, for judge described MAC Address that the information of vehicles of reception comprises whether with selfMAC Address identical;
Record cell, for the described MAC Address that comprises when the information of vehicles of described reception and selfWhen MAC Address is different, forward and record the information of vehicles receiving;
Generation unit, connects topological structure for generating vehicle according to the information of vehicles of record;
Computing unit, calculates current road conditions for connecting topological structure according to described vehicle.
7. device as claimed in claim 6, is characterized in that, described device also comprises:
Processing unit, for periodically obtaining the information of vehicles of self; The car of self described in recording and forwardingInformation.
8. device as claimed in claim 6, is characterized in that:
Whether described record cell, there is the first vehicle letter specifically for judgement in the information of vehicles having recordedBreath, the MAC that the MAC Address that described the first information of vehicles comprises and the information of vehicles of described reception compriseAddress is identical; In the time there is not described the first information of vehicles in the described information of vehicles having recorded, record instituteState the information of vehicles of reception; In the time there is described the first information of vehicles in the described information of vehicles having recorded,Utilize the information of vehicles of described reception to replace described the first information of vehicles.
9. device as claimed in claim 6, is characterized in that:
Described generation unit, specifically for obtaining vehicle position information from the information of vehicles having recorded; RootGenerate described vehicle according to described vehicle position information and connect topological structure.
10. device as claimed in claim 6, is characterized in that:
Described computing unit, specifically for obtaining between the road conditions Statistical Area of dividing in advance; According to described vehicleConnect topological structure and obtain the information of vehicles that is positioned at the vehicle between described road conditions Statistical Area, described vehicle letterThe speed that breath comprises vehicle; Calculate the average speed of the vehicle in described road conditions Statistical Area; Obtain defaultThe threshold speed of various road conditions; By the average speed between described road conditions Statistical Area and described various road conditionsThreshold speed compares; Determine the road conditions between described road conditions Statistical Area according to comparative result.
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| CN201510721347.XA CN105590467A (en) | 2015-10-30 | 2015-10-30 | Road condition information acquisition method and device |
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| CN104881999A (en) * | 2015-06-16 | 2015-09-02 | 山东大学 | Distributed system and method for automatically collecting and inquiring traffic information |
| CN104900082A (en) * | 2015-05-15 | 2015-09-09 | 四川大学 | Data transmission method and device for traffic situation sensing |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030225511A1 (en) * | 2001-10-31 | 2003-12-04 | Kazumitsu Kushida | Vehicle recognition support system |
| CN102624896A (en) * | 2012-03-12 | 2012-08-01 | 东南大学 | Vehicle density sensing system and vehicle density sensing method based on inter-vehicle communication |
| CN103269478A (en) * | 2013-05-17 | 2013-08-28 | 南京邮电大学 | Rapid broadcasting method based on position information in vehicular network |
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