CN110072213A - A kind of high-performance server is applied to the method in vehicular ad hoc network - Google Patents
A kind of high-performance server is applied to the method in vehicular ad hoc network Download PDFInfo
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- CN110072213A CN110072213A CN201910326796.2A CN201910326796A CN110072213A CN 110072213 A CN110072213 A CN 110072213A CN 201910326796 A CN201910326796 A CN 201910326796A CN 110072213 A CN110072213 A CN 110072213A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/06—Testing, supervising or monitoring using simulated traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/44—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
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Abstract
The invention discloses a kind of high-performance servers to be applied to the method in vehicular ad hoc network, belong to server application and car networking field, the technical problem to be solved in the present invention is how to use server as RSU infrastructure, improve the flexibility of RSU node in VANET, it reduces costs, to arrange more RSU to guarantee the connectivity of data and the selectivity of Optimal calculation, the technical solution of use are as follows: this method is by high-performance server as roadside unit, using the macroscopical path selection mechanism assisted based on roadside unit, the distribution situation of vehicle on road is obtained with the roadside unit information exchange and multi-class V2R message statistics that are deployed in roadside by vehicle node, to calculate roading density, to guarantee that connectivity and short path are preferably principle, thought using global design Want to select the optimal transmission paths by source node to destination node.
Description
Technical field
The present invention relates to server application and car networking field, specifically a kind of high-performance server is applied to vehicle
Carry the method in self-organizing network.
Background technique
In recent years, car networking, unmanned or even military vehicle carried driving auxiliary are quickly grown.In some mobile environment and spy
In different scene, traditional centerized fusion, the cellular network for laying base station in advance mainly go to carry out at data using base station
Reason, algorithm design-calculated mode have been unable to meet the scene application of the Ad Hoc network from creation, self-organizing.In order to mitigate pair
The dependence of base station and data center pressure, mobile small-sized data processing node start to be used.In order to mitigate to base station according to
Rely and data center pressure, mobile small-sized data processing node start to be used.Ad Hoc network is a dynamic network,
Node in network can be any movement.Ad hoc network (Ad Hoc) is a kind of wireless distributed structure, emphasizes multi-hop, from group
It knits, acentric concept.Car self-organization network (Vehicular Ad Hoc Network；VANET) as a kind of novel movement
Self-organization network is the important component of intelligent transportation system application, in traffic accident early warning, Traffic flux detection and to drive
It sails personnel and provides information service and value-added service etc. all with huge potentiality.VANET is the special shape of MANET, it
Have the characteristics that the various of mobile ad-hoc network, for example autonomy and the dynamic without fixed structure, multihop routing, network topology become
Change, network capacity is limited, good scalability etc..But in VANET network, special application environment, such as narrow road, height
Density Node distribution, node high-speed mobile etc., directly affect its message transmission capability, so that packet loss increases, delay increases.
The basic framework of VANET network is broadly divided into vehicle and communicates with vehicle (V2V), and vehicle communicates two kinds of knots with infrastructure (V2I)
Structure.V2V communicates the relevant information that can make other vehicles on monitoring vehicles in real time to its neighbouring road, is traffic safety and intelligence
Driving etc. provides a kind of high-tech solution.V2I communication can then make vehicle learn all kinds of facilities in its periphery at any time
Relevant information provides all kinds of information on services and data network access, and communication system is generally by board unit (OBU), trackside list
First (RSU) and 3 part of special short distance wireless communication protocol composition.
In VANET, travels each vehicle on road and be used as the node for participating in communication in the network, pass through outfit
Signal receiving and transmitting apparatus, navigation equipment and computer control module on vehicle etc. provide wireless communication, and mobile count
It is defined as on board unit (On Board Unit, OBU) according to transmission and the vehicle obtained, ambient condition information can be acquired, into
The calculation processing of row data and the stationary infrastructure fed back are defined as roadside unit (Road Side Unit, RSU).Road
Side unit is deployed in transportation network, provides the two-way communication of vehicle and RSU in communication context.All RSU pass through
Internet is linked into the control centre of intelligent transportation system, carries out United Dispatching by central site network, meanwhile, it can also will be in control
The relevant information of the heart returns to vehicle.RSU must have signal processing, the basic model of networking is built, algorithm data arranges simultaneously
Complete the functions such as feedback.Entire VANET network can mainly be divided into vehicle and vehicle (Vehicular To Vehicular,
V2V), vehicle and roadside unit (Vehicular To Road Side Unit, V2R) two parts form.
With the continuous development of server, the server of modern high performance either computing capability, data-handling capacity, letter
Number transmittability has all reached a high level.Therefore how to use server as RSU infrastructure, it improves in VANET
The flexibility of RSU node, reduces costs, to arrange more RSU to guarantee the connectivity of data and the choosing of Optimal calculation
Selecting property is technical problem urgently to be solved in currently available technology.
The patent document of Patent No. CN106713326A discloses a kind of vehicle-mounted network information authentication protocol, vehicular ad hoc network
Including authentic authentication center, on board unit and roadside unit, the message authentication protocols usage threshold are acted on behalf of weight signature algorithm and are protected
Vehicle privacy information is protected, signature of the vehicle-carrying communication unit to message is converted into authentication center to the signature of same message, thus
The risk according to signature tracking on board unit is reduced, realizes the anonymity of communication information.It will weight signature key by thresholding mode
It is dispersed to multiple roadside communication units to be managed, reduces the decoding success rate of weight signature key and prevents roadside communication unit indiscriminate
It is weighed with allograph.Authentication center solves the problems, such as recalling for violation vehicle by the real vehicles of retrospect publication spoofing.But
It is that the technical solution uses server as RSU infrastructure, improves the flexibility of RSU node in VANET, reduce costs,
To arrange more RSU to guarantee the connectivity of data and the selectivity of Optimal calculation.
The patent document of Patent No. CN103167019B discloses the hybrid belief system in a kind of vehicular ad hoc network
And method, comprising: vehicular component and infrastructure component, in which: on vehicle, it includes: boundary for vehicular component installation and operation
Face mould block, decision-making module, entity reputation computing module, event reputation computing module, event propagation module, communication module, event
Processing module, sensing module；On roadside unit (RSU), these RSU pass through broadband cabled for infrastructure component installation and operation
Or wireless network is connected, infrastructure component includes: reputation memory module, reputation synchronization module.But the technical solution makes
It uses server as RSU infrastructure, improves the flexibility of RSU node in VANET, reduce costs, so that arrangement is more
RSU guarantees the connectivity of data and the selectivity of Optimal calculation.
Patent No. CN103051726A patent document discloses the VANET security information convergence transmission method based on RSU
It is communication group leader to be served as using RSU, and information fusion is carried out to the message timing of legal vehicle in having jurisdiction over using aggregate signature algorithm
Processing, and it is further forwarded to monitoring center, monitoring center is disposably verifying signing messages just by reverse polymerization signature algorithm
True property, while when finding spoofing can be accurately positioned by starting tracing process to disappearing under the assistance of authentication center
The true sender of breath.But the technical solution uses server as RSU infrastructure, improves the spirit of RSU node in VANET
Activity reduces costs, to arrange more RSU to guarantee the connectivity of data and the selectivity of Optimal calculation.
Summary of the invention
Technical assignment of the invention is to provide a kind of method that high-performance server is applied in vehicular ad hoc network, comes
Solve how to use server as RSU infrastructure, improves the flexibility of RSU node in VANET, reduce costs, thus
More RSU are arranged to guarantee the problem of the connectivity of data and the selectivity of Optimal calculation.
Technical assignment of the invention realizes in the following manner, and a kind of high-performance server is applied to vehicular ad hoc net
Method in network, this method is by high-performance server as roadside unit, using based on the macro of roadside unit (RSU) auxiliary
See path selection mechanism, by vehicle node be deployed in roadside roadside unit (RSU) information exchange and multi-class V2R
Message statistics obtain the distribution situation of vehicle on road, so that roading density is calculated, to guarantee that connectivity is excellent with short path
First it is principle, the optimal transmission paths by source node to destination node is selected using global design philosophy.
Preferably, specific step is as follows for this method:
S1, using high-performance server as roadside unit (RSU), so that roadside unit (RSU) is become moveable network section
Point increases node processing power；
S2, every road segment segment is divided into one or more connection graph regions；
S3, the high-performance server for carrying out data model calculating transmission is configured in each connection graph region as roadside
Unit or removable roadside unit；
S4, in transportation network, vehicle node knows that oneself affiliated connected graph zone number and each roadside are single at any time
The coordinate position of first (RSU), while knowing the number of oneself current time affiliated roadside unit (RSU)；
S5, each vehicle node give affiliated roadside unit (RSU) active reporting message, and each roadside unit (RSU) obtains
After the vehicle distribution situation of road segment segment, the estimated value of formation zone density simultaneously blazes abroad；
S6, the Routing Protocol based on topology information, the Routing Protocol based on geographical location and the road based on electronic map
Case study, model buildings, scene setting, operation emulation and interpretation of result are carried out by agreement, select one by source node
To the optimal transmission paths of destination node.
Preferably, the size and division mode that are connected to graph region in the step S2 are by reference to link length, vehicle
And roadside unit (RSU) transmission range determine.
Preferably, the vehicle node in the step S4 is carried out with the vehicle node other than the vehicle node transmission range
It when communication, is forwarded by intermediate car node, is carried out at data using the roadside unit (RSU) that server is core building
Reason calculates, and plans as a whole to calculate and plays the role of arranging whole system transmission, mitigates data center's mass data and pour in the bandwidth faced
The pressure of bottleneck.
More preferably, vehicle node passes through GPS in the step S4 or electronic map equipment knows connection belonging to oneself at any time
The coordinate position of graph region number and each roadside unit (RSU).
Preferably, vehicle node to roadside unit (RSU) active reporting message is primarily present in two in the step S5
At the critical switching of class: the first kind is present in the intersection of two adjacent roadside unit (RSU) ranges, and the second class is present in roadside unit
(RSU) and connected graph apex and the intersection on two connected graph vertex.
Preferably, Routing Protocol in the step S6 based on topology information, based on the Routing Protocol in geographical location with
And the Routing Protocol based on electronic map carries out case study, model buildings, scene setting, operation emulation and interpretation of result,
Selecting the optimal transmission paths by source node to destination node, specific step is as follows:
S601, it is verified in small server, builds model on the server using network simulator NS-3 and carry out
Emulation；
S602, generated using the higher VANET Simulated movable model emulation software Bonnmotion of applying frequency needed for
The simulating scenes file wanted；
S603, required Manhattan mobility model is emulated using Bonnmotion Software Create；
S604, the Manhattan mobility model of generation is converted to moving tracing file (Movement file) and is imported into
In network simulator NS-3；
S605, one is selected using network simulator NS-3 by the optimal transmission paths of source node to destination node and right
As a result it is analyzed.
More preferably, the speed of vehicle node is 0-20m/s during motion simulation in the step S6.
The method that high-performance server of the invention is applied in vehicular ad hoc network has the advantage that
(1), the present invention uses server as RSU infrastructure, not only improves the flexibility of RSU node in VANET,
And it reduces costs and guarantees the connectivity of data and the selectivity of Optimal calculation so as to arrange more RSU；
(2), the ability that high-performance server mostly uses multicore multichannel CPU to carry out data calculation processing, in traditional VANET
It is complicated in face of road scene, processing data are various, signal transmission real-time it is strictly necessary by base station facility as RSU node into
Row networking, after nodes more as far as possible is using server substitution, in VANET network when needing to send data packet there are node,
The communication link of connection source node and destination node runs far deeper than one.Most routings different from the past are using based on historical data
Prediction or vehicle independently find that the evaluation mechanism of density, the present invention propose one kind based on RSU (Road Side Unit) auxiliary
Macroscopical path selection mechanism, by vehicle node be deployed in roadside RSU information exchange and multi-class V2R message statistics
The distribution situation of vehicle on road is obtained, so that roading density is calculated, to guarantee that connectivity and short path are preferably principle
Select a connection source node to the optimal path of destination node；
(3), server is added in roadside unit by the present invention, the process flattening that can preferably make data-signal handle,
In terms of the connectivity of truck traffic, due to the mobile high dynamic for leading to topological structure of vehicle high-speed, the sparsity of equipment arrangement
And building blocks etc., can all cause the non-interconnected property of truck traffic；High-performance server is mobile flexible and convenient, can set
In on move vehicle platform, data center has a large amount of vehicle simultaneous transmission information that can encounter bandwidth bottleneck when solving actual application
Problem；
(4), certain in topological structure in high-speed mobile is solved as RSU using the node that server is main device build
A little nodes always the communication capacity between irremovable network of problem high speed mobile node (vehicle) dependent on being loaded in node
On wireless communication transmissions module, therefore, communication capacity and transmission range are often limited, and data processing computing capability is even more thin
It is weak, when node will be communicated with the node other than its transmission range, it is necessary to it is forwarded by means of other intermediate nodes, this
Sample just plays data processing as the RSU that core constructs using server and calculates, and plans as a whole the effect that algorithm arranges whole system transmission,
Mitigate the pressure that data center's mass data pours in the bandwidth bottleneck faced.
Detailed description of the invention
The following further describes the present invention with reference to the drawings.
Attached drawing 1 is the brief model schematic for the method that high-performance server is applied in vehicular ad hoc network；
Attached drawing 2 is the structural block diagram for the method that high-performance server is applied in vehicular ad hoc network；
Attached drawing 3 is the division of path connected graph region, the affiliated connected graph zone number of vehicle node oneself and each RSU
The schematic diagram of coordinate position；
Attached drawing 4 is Manhattan model RSU distribution map.
Specific embodiment
Vehicular ad hoc is applied to a kind of high-performance server of the invention referring to Figure of description and specific embodiment
Method in network is described in detail below.
Embodiment 1:
As shown in Fig. 1, high-performance server of the invention is applied to the method in vehicular ad hoc network, and this method is
By high-performance server as roadside unit, using the macroscopical path selection mechanism assisted based on RSU, by vehicle node with
The information exchange and multi-class V2R message statistics for being deployed in roadside RSU obtain the distribution situation of vehicle on road, thus
Calculate roading density, to guarantee connectivity and short path is preferably principle, using global design philosophy select one by
Optimal transmission paths of the source node to destination node.
Embodiment 2:
As shown in Fig. 2, high-performance server of the invention is applied to the method in vehicular ad hoc network, this method
Specific step is as follows:
S1, using high-performance server as RSU, so that RSU is become moveable network node, increase node processing power；
S2, every road segment segment is divided into one or more connection graph regions；Wherein, be connected to graph region size and
Division mode is determined by reference to the transmission range of link length, vehicle and RSU.
S3, the high-performance server for carrying out data model calculating transmission is configured in each connection graph region as roadside
Unit or removable roadside unit；
S4, in transportation network, vehicle node knows oneself affiliated connected graph area by GPS or electronic map equipment at any time
The coordinate position of Field Number and each RSU, while knowing the number of oneself current time affiliated RSU, as shown in Fig. 3；Vehicle
When node is communicated with the vehicle node other than the vehicle node transmission range, it is forwarded by intermediate car node,
Data processing calculating is carried out using the RSU that server is core building, plans as a whole to calculate and plays the role of arranging whole system transmission,
Mitigate the pressure that data center's mass data pours in the bandwidth bottleneck faced.
S5, each vehicle node give affiliated RSU active reporting message, and each RSU obtains the vehicle distribution situation of road segment segment
Afterwards, it the estimated value of formation zone density and blazes abroad；It is critical that vehicle node to RSU active reporting message is primarily present in two classes
At switching: the first kind is present in the intersection of two adjacent RSU ranges, and the second class is present in RSU and connected graph apex and two
The intersection on connected graph vertex.
S6, the Routing Protocol based on topology information, the Routing Protocol based on geographical location and the road based on electronic map
Case study, model buildings, scene setting, operation emulation and interpretation of result, vehicle during motion simulation are carried out by agreement
The speed of node is 0-20m/s, selects the optimal transmission paths by source node to destination node, the specific steps are as follows:
S601, it is verified in small server, builds model on the server using network simulator NS-3 and carry out
Emulation；
S602, generated using the higher VANET Simulated movable model emulation software Bonnmotion of applying frequency needed for
The simulating scenes file wanted；
S603, required Manhattan mobility model is emulated using Bonnmotion Software Create；
S604, the Manhattan mobility model of generation is converted to moving tracing file (Movement file) and is imported into
In network simulator NS-3；
S605, one is selected using network simulator NS-3 by the optimal transmission paths of source node to destination node and right
As a result it is analyzed.
Embodiment 3:
It is verified in small server, builds model on the server using network simulator NS-3 and emulated,
The text of simulating scenes required for being generated using the higher VANET Simulated movable model emulation software Bonnmotion of applying frequency
Part.Bonnmotion software is researched and developed by the Communication Studies group of Univ Bonn Germany, is a scene based on written in Java
Creation and scene analysis software, have a wide range of applications in Ad Hoc network and VANET network simulation, use
Manhattan mobility model required for Bonnmotion Software Create emulates, as shown in Fig. 4；The mobility model of generation is turned again
It is changed to moving tracing file (Movement file) and imported into NS-3；The parameter setting such as following table institute of implementation process emulation
Show:
| Simulation parameter | Parameter setting |
| Emulation platform and tool | Ubuntu12.04+NS-3.23+Bonnmotion |
| Mac-layer protocol | IEEE 802.11p |
| Application layer traffic-the | CBR |
| Mode | Two-Ray-Ground(LOS&NLOS) |
| Simulating scenes | 3000mx3000m |
| Simulation time | 600s |
| Vehicle node transmits radius | 250m |
| RSU transmits radius | 300m |
| Data packet packet size | 512bytes |
| Data packet transmission rate | 2.5KBps(5packets/s) |
| Beacon period size | Fixed cycle 2s (dynamic changes) |
| The RSU density estimation period | 3s |
| Routing retries the waiting time | 5s |
| Vehicle node number | 200,300,400 |
| Vehicle node speed | 0~20m/s (interval 5m/s) |
| Single protocol emulation number under special scenes | 10 times |
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (8)
1. a kind of high-performance server is applied to the method in vehicular ad hoc network, which is characterized in that this method is to pass through height
Performance server is as roadside unit, using the macroscopical path selection mechanism assisted based on roadside unit, by vehicle node with
The roadside unit information exchange and multi-class V2R message statistics for being deployed in roadside obtain the distribution feelings of vehicle on road
Condition, to guarantee that connectivity and short path are preferably principle, is selected to calculate roading density using global design philosophy
One optimal transmission paths by source node to destination node.
2. high-performance server according to claim 1 is applied to the method in vehicular ad hoc network, which is characterized in that
Specific step is as follows for this method:
S1, using high-performance server as roadside unit, so that roadside unit is become moveable network node, increase node processing
Ability；
S2, every road segment segment is divided into one or more connection graph regions；
S3, the high-performance server for carrying out data model calculating transmission is configured in each connection graph region as roadside unit
Or removable roadside unit；
S4, in transportation network, vehicle node knows oneself affiliated connected graph zone number and each roadside unit at any time
Coordinate position, while knowing the number of oneself current time affiliated roadside unit；
S5, each vehicle node give affiliated roadside unit active reporting message, and each roadside unit obtains the vehicle point of road segment segment
After cloth situation, the estimated value of formation zone density simultaneously blazes abroad；
S6, the Routing Protocol based on topology information, the Routing Protocol based on geographical location and the association of the routing based on electronic map
View carries out case study, model buildings, scene setting, operation emulation and interpretation of result, selects one by source node to mesh
Mark the optimal transmission paths of node.
3. high-performance server according to claim 1 is applied to the method in vehicular ad hoc network, which is characterized in that
In the step S2 be connected to graph region size and division mode by reference to link length, vehicle and roadside unit biography
Defeated range determines.
4. high-performance server according to claim 1 is applied to the method in vehicular ad hoc network, which is characterized in that
When vehicle node in the step S4 is communicated with the vehicle node other than the vehicle node transmission range, by intermediate vehicle
Node is forwarded, and utilizing server is that the roadside unit of core building carries out data processing calculating.
5. high-performance server according to claim 1 or 4 is applied to the method in vehicular ad hoc network, feature exists
In, in the step S4 vehicle node by GPS or electronic map equipment know at any time oneself affiliated connected graph zone number with
And the coordinate position of each roadside unit.
6. high-performance server according to claim 1 is applied to the method in vehicular ad hoc network, which is characterized in that
Vehicle node is primarily present at the critical switching of two classes to roadside unit active reporting message in the step S5: the first kind exists
In the intersection of two adjacent roadside unit ranges, the second class is present in roadside unit and connected graph apex and two connected graph tops
The intersection of point.
7. high-performance server according to claim 1 is applied to the method in vehicular ad hoc network, which is characterized in that
Routing Protocol based on topology information, the Routing Protocol based on geographical location and the road based on electronic map in the step S6
Case study, model buildings, scene setting, operation emulation and interpretation of result are carried out by agreement, select one by source node
To the optimal transmission paths of destination node, specific step is as follows:
S601, it is verified in small server, builds model on the server using network simulator NS-3 and emulated；
S602, required simulating scenes file is generated using VANET Simulated movable model emulation software Bonnmotion；
S603, required Manhattan mobility model is emulated using Bonnmotion Software Create；
S604, the Manhattan mobility model of generation is converted into moving tracing file and is imported into network simulator NS-3；
S605, one is selected by the optimal transmission paths of source node to destination node and to result using network simulator NS-3
It is analyzed.
8. high-performance server according to claim 1 or claim 7 is applied to the method in vehicular ad hoc network, feature exists
In the speed of vehicle node is 0-20m/s during motion simulation in the step S6.
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| CN111222494A (en) * | 2020-01-21 | 2020-06-02 | 腾讯科技（深圳）有限公司 | Target vehicle tracking method and device |
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