CN101286267A - Wireless ad hoc network traffic navigation system and method based on multi-source data - Google Patents
Wireless ad hoc network traffic navigation system and method based on multi-source data Download PDFInfo
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Abstract
The invention discloses a traffic navigation method of a wireless ad hoc network based on multi-source data, including a sudden traffic accident prewarning process. The prewarning process includes the steps: 1, the information collected from an information collecting module is obtained; 2, the emergency degree of the accident and the region and direction where the accident information is required to be issued are all arranged according to the information acquired from the step 1; 3, a vehicle knot which collects the sudden traffic accident information adjusts the priority and issuing region of the information according to the type and emergency degree of the traffic accident and transfers the accident information according to the issuing direction of the information; 4, the vehicles knot which receives the sudden traffic accident information inform drivers and passengers of the prewarning information ahead. The invention additionally adopts the prewarning function for sudden traffic accidents to better avoid the chain collision when the accident happens.
Description
Technical field
The invention belongs to the intelligent information processing technology field, relate to a kind of traffic guide method, relate in particular to a kind of wireless ad hoc network traffic navigation system and method, be used for the traffic-information service of vehicle in city operation environment based on multi-source data.
Background technology
Traffic problems are serious problems in the megalopolis, development along with wireless moving vehicle technology, traffic guide method based on wireless moving vehicle MANET technology has been proposed at present, can alleviate the urban traffic blocking situation to a certain extent for the user provides distributed communication navigation service.
The for example German Fleetnet that carries out (FleetNet.http: //www.et2.tu-harburg.de/fleetnet/index.html.2003-5) project improves driver and passenger's safety and comfortableness by inter-vehicular communication mode (Inter-vehicle Communication), VGrid project (Anda, J., LeBrun, J., Ghosal, D., et al.:VGrid:Vehicular AdHoc Networking andComputing Grid for Intelligent Traffic Control.Proceedings of IEEE 61st Vehicular TechnologyConference (VTC2005-Spring), Vol.61, No.5. (2005) 2905-2909) solve and work in coordination with the control problem of traffic flow by IVC, AutoNet and TrafficView (Nadeem, T., Dashtinezhad, S., Liao, C.Y., Iffode, L.:TrafficView:A Scalable Traffic Monitoring System.Proceedings of 2004 IEEE InternationalConference on Mobile Data Management. (2004) 13-26) a kind of distributed traffic navigation system based on the IVC technology in the wireless moving vehicle network has been proposed.
As above these are based on the traffic navigation system of wireless moving vehicle network, its method of service and process are as follows: each vehicle mobile node is formed radio mobile self-organizing network, each car is to the longitude and latitude and the velocity information of this net distribution self, after other vehicles receive these information, latitude and longitude information to other vehicles of receiving positions, determine vehicle on which highway section, thereby obtain the traffic related information in this highway section.This navigate mode has himself advantage, as distributed treatment information, obtains traffic information in real time, and system delay is little etc.; But all also have very big gap with the application demand of reality on service quality and content, the data and the type service that provide are more single, as lacking the warning function to the traffic accident, can't provide the service etc. of customization for the user.
Summary of the invention
Technical matters to be solved by this invention is: a kind of wireless ad hoc network traffic navigation system based on multi-source data is provided.
In addition, the present invention also provides the traffic guide method that utilizes said system.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of traffic navigation system of the wireless self-networking based on multi-source data comprises that being arranged at road takes up information acquisition module, information sending module, information receiving module on the vehicle; This system also comprises burst traffic events early warning module, and this early warning module comprises and is arranged on the vehicle or burst traffic events prewarning unit that road is other; When described burst traffic events prewarning unit detects or receive the burst traffic events, apart from this burst traffic events distance priority is set according to other burst traffic events prewarning unit, the burst traffic event information is sent to other burst traffic events prewarning unit.
As a preferred embodiment of the present invention, described burst traffic events prewarning unit sends to other burst traffic events prewarning unit in 500 meters of the distance burst traffic events to the burst traffic event information.
A kind of traffic guide method of the wireless self-networking based on multi-source data is used for traffic navigation system, and described traffic navigation system comprises that being arranged at road takes up information acquisition module, information sending module, information receiving module on the vehicle; Comprise burst traffic events early warning process, this early warning process comprises the steps:
As a preferred embodiment of the present invention, the vehicle node of collecting burst traffic events message among the described step 1C is to cause or the vehicle of the traffic events of finding to happen suddenly, this vehicle is broadcasted out warning message, has comprised traffic events type, vehicle sign, highway section sign in the information.
As a preferred embodiment of the present invention, described recipient can further transmit this message and give front vehicle.
As a preferred embodiment of the present invention, for immediately following the vehicle at burst traffic events rear, system can use sound and picture warning driver, and also can access the warning of different stage for the vehicle at rear more.
As a preferred embodiment of the present invention, among the described step 1A, described information acquisition module comprises vehicle sensors or/and the collector that the roadside is provided with, the information of collecting from information acquisition module comprise vehicle cast anchor information, the traffic hazard event information takes place.
As a preferred embodiment of the present invention, among the described step 1B, the corresponding transmission priority of the urgency of incident.
As a preferred embodiment of the present invention, among the described step 1D, the mode of early warning information notice comprise that prompting is slowed down or/and voice broadcast or/and show traffic information.
As a preferred embodiment of the present invention, described traffic guide method comprises the communication navigation process of real-time road, comprises the steps:
Form wireless moving vehicle network between step 2A, the vehicle, can exchange information;
The vehicle in step 2E, target highway section receives request response, and the road conditions in self highway section, place are mail to the requesting party.
As a preferred embodiment of the present invention, described traffic guide method comprises traffic events video information distribution procedure, and traffic navigation system comprises at least one server, plurality of client end, and client is installed on the vehicle; Described traffic events video information distribution procedure comprises the steps:
As a preferred embodiment of the present invention, described vehicle is furnished with car-mounted terminal, and this car-mounted terminal comprises supports 802.11 agreement wireless LAN cards, GPS receiver, can receive gps data in real time.
Beneficial effect of the present invention is: the present invention increases the warning function to the traffic accident, when unexpected incidents such as traffic hazard take place, collision vehicle and the initial vehicle of finding traffic hazard can be in time rearward vehicle send information, after receiving prompting, can prepare if having time at the vehicle at burst traffic events rear; Prevent preferably when accident takes place, a chain of collision occurs.
Description of drawings
Fig. 1 is the process flow diagram of traffic guide method burst traffic events early warning process of the present invention.
Fig. 2 is the process flow diagram of the communication navigation process of traffic guide method real-time road of the present invention.
Fig. 3 is the process flow diagram of traffic guide method traffic events video information distribution procedure of the present invention.
Fig. 3-1 is the process flow diagram at client one top-cross interpreter part video information distribution procedure.
Fig. 3-2 is the process flow diagram at server one top-cross interpreter part video information distribution procedure.
Fig. 4 is the wireless ad hoc network traffic navigation system synoptic diagram based on multivariate data.
Embodiment
Describe the preferred embodiments of the present invention in detail below in conjunction with accompanying drawing.
Embodiment one
The present invention has disclosed a kind of traffic navigation system, comprises that being arranged at road takes up information acquisition module, information sending module, information receiving module on the vehicle; This system also comprises burst traffic events early warning module, and this early warning module comprises and is arranged on the vehicle or burst traffic events prewarning unit that road is other; When described burst traffic events prewarning unit detects or receive the burst traffic events, apart from this burst traffic events distance priority is set according to other burst traffic events prewarning unit, the burst traffic event information is sent to other burst traffic events prewarning unit.Preferably, described burst traffic events prewarning unit sends to other burst traffic events prewarning unit in 500 meters of the distance burst traffic events to the burst traffic event information.
Simultaneously, the present invention has also disclosed a kind of traffic guide method, is used for traffic navigation system, and described traffic navigation system comprises that being arranged at road takes up information acquisition module, information sending module, information receiving module on the vehicle; The present invention includes burst traffic events early warning process.
Vehicular ad hoc network can provide the application service relevant with traffic safety for the driver, as, collision is avoided, driver assistance, magnitude of traffic flow optimization etc.Usually, some relate to tens of, and the great traffic hazard of hundreds of cars generally all is that minor accident by the place ahead causes, and the vehicle rear end collision at rear is extruded into a pile; And traffic events early warning system can reduce the occurrence probability of this type of accident well.
In burst traffic events early warning service, if a vehicle causes or find traffic hazard, it has comprised the traffic events type with broadcasting out a warning message in information, vehicle id and highway section id etc.The recipient can further transmit the vehicle that this message is given the rear.For immediately following the vehicle at burst traffic events rear, system can use sound and picture warning driver, and also can access the warning of different stage for the vehicle at rear more.In wagon flow, this warning message transmission based on the vehicular ad hoc network network, its efficient will be far above " chain reaction " of brake lamp in traditional wagon flow.
See also Fig. 1, this early warning process comprises the steps:
The data packet format such as the table 1 that send among the step 1C:
Table 1 traffic events early warning service data packet form
| Type | Time | Road | Event | TTL |
| Type Time Road Event TTL | The scope jumping figure of this event transmission of type id of type of data packet data packet transmission highway section, place id burst constantly traffic events |
Wherein the type definition of traffic events is:
0: traffic hazard
1: repair in the highway section
2: the highway section is checked
3: traffic control
The present invention also comprises the communication navigation process of real-time road, each car all is equipped with gps receiver, can obtain longitude and latitude, speed, and the azimuth information of location self, these information adopt the IVC mode to distribute in wireless moving vehicle network, after other vehicle receives these information, can be in the hope of the vehicle average velocity on the highway section, place, thus judge the traffic in highway section, place; Simultaneously, in conjunction with the pre-electronic chart of installing of mobile unit, can obtain the highway section traffic information of user's appointment by the car self-organization network network.
As shown in Figure 2, the communication navigation process of described real-time road comprises the steps:
Form wireless moving vehicle network between step 2A, the vehicle, can exchange information;
The vehicle in step 2E, target highway section receives request response, and the road conditions in self highway section, place are mail to the requesting party.
Among the step 2C, the data packet format such as the table 2 of the transport information of collection:
Table 2 traffic neighborhood road conditions service data packet form
| Type | Time | Road | Position | Speed |
| Type Time Road Position Speed | The type of data packet data packet transmission is id vehicle longitude and latitude position, highway section, place car speed constantly |
Under the traffic hazard scene of special traffic scene or burst, driver passenger need understand the traffic environment situation in a certain location, and will be the manifestation mode of the best with picture or visual form display message.Described traffic guide method comprises traffic events video information distribution procedure, and traffic navigation system comprises at least one server, plurality of client end, and client is installed on the vehicle.
As shown in Figure 3, described traffic events video information distribution procedure comprises the steps:
Whether step 3B, affirmation distribute, if confirm, change step 3C; Otherwise continue to wait for request;
Fig. 3-1, Fig. 3-2 introduced client one side and the treatment scheme of service end one side in traffic events video information distribution procedure respectively.
Embodiment two
In order to understand technical scheme of the present invention better, be further described below in conjunction with drawings and Examples two.The wireless ad hoc network traffic air navigation aid that the present invention is based on multivariate data as shown in Figure 4.
Form wireless moving vehicle network between the vehicle in the road.The longitude and latitude and the velocity information of distributing each vehicle on the one hand in the wireless moving vehicle network, the picture video information of distributing various burst traffic event informations on the other hand and staging by demand.Thereby each vehicle node is calculated the neighborhood real-time road, make the safe handling of different stage at difference burst traffic events, obtain dynamic implementation traffic information and corresponding video pictures information by car self-organization network, for the terminal user provides multiple communication navigation service.
Hardware aspect, radio network interface adopt wireless protocols 802.11 to realize that car-mounted terminal adopts the PDA of Hewlett-Packard, all have on each PDA and support 802.11 agreement wireless LAN cards.Other is connected to HOLUX bluetooth GPS receiver, can receive gps data in real time.The software aspect, in the present embodiment, car-mounted terminal adopts Pocket PC 2003 operating systems, and the wireless self-networking Routing Protocol adopts ripe AODV agreement, the wireless network of forming self-organization, application program adopt Windows Embedded visual c++ 4.0 development environments.
Above embodiment is the unrestricted technical scheme of the present invention in order to explanation only.Any modification or partial replacement that does not break away from spirit and scope of the invention all should be encompassed in the middle of the claim scope of the present invention.
Claims (12)
1, a kind of traffic navigation system of the wireless self-networking based on multi-source data comprises that being arranged at road takes up information acquisition module, information sending module, information receiving module on the vehicle; It is characterized in that:
This system also comprises burst traffic events early warning module, and this early warning module comprises and is arranged on the vehicle or burst traffic events prewarning unit that road is other;
When described burst traffic events prewarning unit detects or receive the burst traffic events, apart from this burst traffic events distance priority is set according to other burst traffic events prewarning unit, the burst traffic event information is sent to other burst traffic events prewarning unit.
2, traffic navigation system according to claim 1 is characterized in that: described burst traffic events prewarning unit sends to other burst traffic events prewarning unit in 500 meters of the distance burst traffic events to the burst traffic event information.
3, a kind of traffic guide method of the wireless self-networking based on multi-source data is used for the described traffic navigation system of claim 1; It is characterized in that comprise burst traffic events early warning process, this early warning process comprises the steps:
Step 1A, obtain the information of collecting from information acquisition module;
Step 1B, the message level that obtains according to step 1A are provided with the urgency of this incident and the regional extent and the direction of the required distribution of this event message;
Step 1C, collect the vehicle node of burst traffic events message,, adjust priority and regional extent that this message need be distributed according to the type and the urgency of this traffic events, and according to the distributor of message to transmitting this event message;
Step 1D, receive the vehicle node of burst traffic events message, in advance early warning information is notified to driver and passenger.
4, traffic guide method according to claim 3, it is characterized in that: the vehicle node of collecting burst traffic events message among the described step 1C is to cause or the vehicle of the traffic events of finding to happen suddenly, this vehicle is broadcasted out warning message, has comprised traffic events type, vehicle sign, highway section sign in the information.
5, traffic guide method according to claim 4 is characterized in that: described recipient can further transmit this message and give front vehicle.
6, traffic guide method according to claim 4 is characterized in that: for immediately following the vehicle at burst traffic events rear, system can use sound and picture warning driver, and also can access the warning of different stage for the vehicle at rear more.
7, according to claim 3 or 4 or 5 or 6 described traffic guide methods, it is characterized in that: among the described step 1A, described information acquisition module comprises vehicle sensors or/and the collector that the roadside is provided with, the information of collecting from information acquisition module comprise vehicle cast anchor information, the traffic hazard event information takes place.
8, according to claim 3 or 4 or 5 or 6 described traffic guide methods, it is characterized in that: among the described step 1B, the corresponding transmission priority of the urgency of incident.
9, traffic guide method according to claim 3 is characterized in that: among the described step 1D, the mode of early warning information notice comprise that prompting is slowed down or/and voice broadcast or/and show traffic information.
10, according to claim 3 or 4 or 5 or 6 described traffic guide methods, it is characterized in that: described traffic guide method comprises the communication navigation process of real-time road, comprises the steps:
Form wireless moving vehicle network between step 2A, the vehicle, can exchange information;
Step 2B, each car are distributed longitude and latitude, speed, highway section, the place beacon information of self to certain area coverage;
Step 2C, each car are collected the transport information that other vehicle branches send on the highway section, place, try to achieve the average velocity of vehicle on the highway section, place, thereby obtain the traffic related information in highway section, place;
Step 2D, user specify the highway section that need obtain traffic information on mobile unit, this vehicle sends solicited message to the target highway section;
The vehicle in step 2E, target highway section receives request response, and the road conditions in self highway section, place are mail to the requesting party.
11, according to claim 3 or 4 or 5 or 6 described traffic guide methods, it is characterized in that: described traffic guide method comprises traffic events video information distribution procedure, traffic navigation system comprises at least one server, plurality of client end, and client is installed on the vehicle; Described traffic events video information distribution procedure comprises the steps:
Step 3A, client-requested have the server in video information source or/and client sends the traffic events video information;
Step 3B, described server with video information source be or/and the request among the client receiving step 3A, and confirm whether distribute, if confirm, changes step 3C; Otherwise continue to wait for request;
Step 3C, describedly has the server in video information source or/and client sends the traffic events video information to corresponding client.
12, according to claim 3 or 4 or 5 or 6 described traffic guide methods, it is characterized in that: described vehicle is furnished with car-mounted terminal, and this car-mounted terminal comprises supports 802.11 agreement wireless LAN cards, GPS receiver, can receive gps data in real time.
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