CN109672996A - One kind being based on V2X roadside device system and its information dispensing method - Google Patents
One kind being based on V2X roadside device system and its information dispensing method Download PDFInfo
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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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/50—Queue scheduling
- H04L47/62—Queue scheduling characterised by scheduling criteria
- H04L47/625—Queue scheduling characterised by scheduling criteria for service slots or service orders
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- 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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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
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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
- H04L67/50—Network services
- H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
- H04L67/61—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources taking into account QoS or priority requirements
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
- H04W72/566—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient
- H04W72/569—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient of the traffic information
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Abstract
One kind is claimed based on V2X roadside device system and information dispensing method in the present invention, specifically includes that communication network management module, Message Agent module, information security assembly module, log management assembly module, messaging bus interface module etc. form.RSU Message Agent module is responsible for the parsing for the message that application layer is sent through messaging bus interface, priority scheduling, is distributed to messaging bus.RSU communication network management module is responsible for shielding platform and RSU attaching communication device protocol otherness, is supplied to middleware Message Agent Unified Communication calling interface.The present invention is unified to V2X RSU to be managed to from heterogeneous networks multi-source informations such as path sensor, vehicle, cloud platform, Differential positioning base stations, and unified communication calling interface is provided to upper layer application, improves the efficiency and functional expansionary of application and development；Message is scheduled based on priority policy, to guarantee that the higher information of the tight degree of information is preferentially sent.
Description
Technical field
The invention belongs to V2X car networking and field of intelligent transportation technology, particularly belongs to a kind of trackside based on V2X communication and set
Standby software architecture and its information dispensing method.
Background technique
As income level of resident and the level of consumption are continuously improved, China's car ownership is being sharply increased, road traffic
Problem is increasingly prominent.V2X car networking technology passes through the communication technology (communication technologys such as DSRC/C-V2X/5G) of new generation and realizes vehicle
With the weak tendencies traffic participant (V2P) such as vehicle (V2V), vehicle and trackside infrastructure (V2I), vehicle and pedestrian, vehicle with
The comprehensive connection and information exchange of cloud platform (V2N).
V2X technology supports V2X car networking by efficient radio resource allocation, the characteristic of support high speed and Seamless Mobile
The participation element such as " people, vehicle, road, cloud " traffic is organically linked together, vehicle can be supported to obtain more than bicycle perception
Information, solve traffic safety, traffic efficiency the problems such as.
In V2X car networking system, roadside device (Roadside Unit, RSU) is generally located on intersection and important
Special road section controls attached sensor (camera, radar, temperature sensor, humidity sensor etc.) and road by management
Traffic controller, acquisition localized road map (MapData, MAP), vehicle movement information (BasicSafety Message,
BSM), road sign (RoadSide Information, RSI), signal lamp state (SignalPhase andTiming
Message, SPAT), traffic participant information (RoadsideSafety Message, RSM) and high accuracy positioning differential data
It is handled, is communicated with the vehicle equipped with V2X communication equipment, provide real-time condition of road surface, traffic congestion to driver
The information such as situation (V2I).In addition to this, roadside device sends vehicle flow and ring to cloud platform by mobile cellular communication mode
Border data (BackGroundMessage, BGM), while the notification message for receiving cloud platform transmission passes through V2X device broadcasts, and
Receive the reverse dynamic control signal lamp state of Signalized control information.
The message that message and mobile cellular communication that roadside device RSU is sent by V2X equipment are sent all include it is a variety of,
The message that different deployment places needs externally to send has different communicating requirements, such as sends frequency, transmission range and urgent
Property, as at crossroad dispose RSU by V2X transmission fixed frequency message include localized road message, signal lamp message,
Road sign message, cloud background message, and cloud platform sends urgent notices information to RSU, is sent to vehicle near crossing by RSU
, urgency level is very high.But V2X or mobile cellular network communication channel resources are limited, need to by V2X or mobile bee
The information that nest network is sent carries out priority allocation schedule, improves the distribution efficiency of message.
In the existing research to RSU, networking problems between the deployed position, communication security, RSU of RSU are had focused largely on.
Noor-A-Rahim et al. is reduced using the basic security information (BSM message) of the RSU forwarding vehicle overseas broadcast of intersection
Blocking of the building to vehicle DSRC broadcast singal.Fogue et al. is using RSU forwarding control traffic message and is vehicle, driver
And passenger provide linking Internet, overcome the problems, such as signal propagation problem and pre-alert notification time delay, for traffic scene function
It can be very simple.The diversity that RSU under vehicles in complex traffic scene needs to handle the message of distribution is not accounted for, message is not accounted for yet
The issue of priority of different messages when distribution, the car accident that the road emergence message and neighbouring vehicle sent such as cloud platform is sent
Information, RSU need busy channel preferentially to forward.
The invention proposes a kind of roadside device software architectures based on V2X communication and its information dispensing method, trackside to set
After treatment by the traffic data of acquisition, encapsulation is encoded into car networking standard information to standby RSU, and fills message attributes information and arrive
Application layer messages frame, is sent to local message broker program, and message broker program stores the message received, dynamic priority
Grade distribution is sent to the intelligence equipped with V2X communication module by V2X communication module according to the message that priority extracts message queue
Net connection automobile or cloud platform, improve the extraction rate and forward efficiency of information.
Summary of the invention
Present invention seek to address that the above problem of the prior art.Propose a kind of extraction rate for improving information and forwarding
Efficiency based on V2X roadside device system and its information dispensing method.Technical scheme is as follows:
One kind being based on V2X roadside device system comprising: communication network management module, Message Agent module, information security
Assembly module, logging component module and messaging bus interface module；Wherein,
Communication network management module: it is converted including message-network mapping module, channel interface selecting module and data protocol
Module, the message-network mapping module provide unified communication calling interface for the application software communicated using heterogeneous networks；
The channel interface selecting module issues corresponding communication channel interface for providing theme message；The data protocol modulus of conversion
The initial data that RSU communication module component acquires is converted to the message packet of specified format by block, is sent to messaging bus interface
Module；
Messaging bus interface module；It is responsible for providing interface to application layer program and communication network management module, receives application
The message that the communication component that the theme message and communication network management module of layer application publication are sent is sent, is sent to Message Agent
Module；
Message Agent module: it is responsible for reading the message packet of messaging bus interface module, according to publisher/Subscriber Information
The message attributes of table and reading dynamically adjust the priority of message to be sent, are sent to the application layer for having subscribed this theme message
Using or communication component；
Information security assembly module: being responsible for data encryption and authentication ensures communication security, flat to RSU and car networking cloud
The long-range connection communication of platform carries out security verification, and the upgrading of RSU internal applications updates and remote control commands are according to storage
Local key can just be sent to application layer applications after carrying out safety and completeness check, verify exception information if it exists and then send
It is recorded to log management assembly module；
Logging component module: it is responsible for the unexpected message operation and day occurs that record information security assembly module receives
Phase, application layer software periodically send log management file and analyze to cloud platform.
Further, the Message Agent module uses message based theme subscription-Issuance model, including message sink
Module, message memory management module, scheduling message distribution module, publish/subscribe module, message reception module are responsible for completing application
Layer software and bottom communication component are sent to the reception of the message frame of middleware, and message memory management module stores each theme and disappears
It ceases and to needing the information externally sent by bottom communication interface to carry out dynamic priority allocation, scheduling message distribution module is excellent
The message for first extracting high-priority queue is sent, and guarantees that the preferential busy channel of the high information of emergency is sent；To logical from bottom
Believe the theme message that component is sent, then by query subscription person's information table, is sent to the application layer software for subscribing to the theme message；
The publish/subscribe module of the Message Agent module is responsible for receiving the message subject of the connection of application layer software and communication component
Registration, de-registration request, realize theme registration table theme dynamic addition, delete and Subscriber Information's table in subscriber addition,
It deletes, record subscriber receives the channel of theme message.
Further, the communication network management module sets up a message-channel map, records in table various logical
Believe the corresponding relationship in channel and type of message, the message distribution module of Message Agent module finds corresponding communication by mapping table
Channel carries out data distribution.
Further, the message memory management module of the Message Agent module is i according to the message subject type received
The message M for being j with sendaisleij, wherein i=1,2 ..., N, j=1,2 ..., K, N establish independent for every a kind of type of message
Message storage queue sum, K are the communication channel sum that message is sent, and judge whether there is reception type of message and are i and send logical
Road is the message queue Q of jij, if so, message is then stored in message queue Qij；If no, creating message queue Qij, formation disappears
Cease queue collection:
Q={ { Q11,Q21,…QN1},{Q12,Q22,…QN2},…{Q1K,Q2K,…QNK}}。
Further, the message memory management module calculates the current excellent of message according to the attribute of message in message queue
First grade,S indicates that highest priority weight, T indicate that message effectively has time, τ
Indicate that the urgent property coefficient of information, f indicate information transmission frequency.When information has the property grabbed IqWhen=1, priority is set as highest
Priority, q are affecting parameters of the emergency to information urgency, and a is impact factor of the message valid time to priority, and b is
Urgency is to the impact factor of priority, a < b and a+b=1.
Further, the breath dispatching delivery module establishes K business according to the quantity K of information sendaisle and sends line
Journey, each transmission thread establish a transmit queue, and poll stores the priority of the message queue of theme message, query communication net
It is logical from corresponding communication to extract theme message since high-priority queue for message-channel map that network management module is established
Road is sent, until the message of high-priority queue is sent, the message for starting to extract next priority query is sent, and is successively mentioned
The data of Qu Ge priority query, until the data of all queues are sent.
A kind of information dispensing method based on the system comprising following steps:
S501: message-network mapping module establishes communication network-message subject mapping table, storage management bottom communication mould
Message subject relationship corresponding to the communication component sendaisle and receiving channel of block；Channel interface selecting module is for providing master
Inscribe the corresponding communication channel interface of news release；The initial data that the data protocol conversion module acquires RSU communication component
The message packet for being converted to specified format is sent to messaging bus interface module；
S502: the communication component that the theme message and communication network management module for receiving application layer applications publication are sent is sent
Message, be sent to Message Agent module；
S503: the message reception module of Message Agent module carries out the message frame message that message bus interface module acquires
The theme message content of message, is sent to the message memory management module of Message Agent module by classification and parsing, will be in message
Message attributes deposit local message attribute list in；
S504: the message memory management module of Message Agent module is established individual reception queue for each subject information and is deposited
Message content is stored up, the information attribute in message attributes table is parsed, according to Priority Queuing algorithm and informed source, dynamic point
Message priority weight with different themes message queue；
S505: the scheduling message distribution module poll of Message Agent module stores the preferential of the message queue of theme message
Grade, query communication network management module establish message-channel map, since high-priority queue extract theme message from
Corresponding communication channel is sent, until the message of high-priority queue is sent, starts to extract disappearing for next priority query
Breath is sent, and successively extracts the data of each priority query；
S506: to the message of communication component publication, by query subscription person's information table, message distribution module extracts information hair
The application layer software for subscribing to the theme message is given, if message comes from car networking cloud platform, information security assembly module is to RSU
Safety and completeness check are carried out with the long-range connection communication of car networking cloud platform, unexpected message operation and date of occurrence are sent out
Give the storage of log management assembly module.
Further, the message frame message of the step S503 includes message content and the attribute for being under the jurisdiction of message, message
Attribute include initial priority, effectively there is time, sending cycle, the property grabbed, emergency in dynamic priority.
Further, the Priority Queuing algorithm of the step S504 is subordinate to disappearing for theme message by dissection process
Attribute is ceased, the different priorities weight of theme message is assigned, the emergency message or path sensor sent from cloud platform is examined
The road hazard information of survey assigns highest priority weight, ensures that emergency message is preferentially sent.
Further, the RSU directly takes message transparent transmission to the difference telegraph text data from high accuracy positioning base station
Data are passed through V2X communication broadcast by mode.
It advantages of the present invention and has the beneficial effect that:
1, vehicles in complex traffic scene is adapted to, tradition is very simple about the traffic scene function of the research of roadside device RSU, main
Position, communication security, networking problems between RSU are studied and deployed, the Message Processing of RSU itself is not made further research.
The present invention is directed to RSU under vehicles in complex traffic scene and the diversity for the message for handling distribution and the isomerism of communication network is needed to grind
Study carefully, RSU is adapted to the information processing of complicated traffic environment.
2, information distribution efficiency is high, and the present invention considers the issue of priority of different types of messages, RSU when RSU message distribution
The message received is stored, priority dynamic allocation, advantage distillation high-priority message is sent, and improves the extraction of information
Speed and utilization efficiency.
3, versatility is good, and all message received and dispatched by V2X equipment all use car networking standard to define, and passes through cellular network
The information of equipment transmitting-receiving also uses standard agreement, ensure that the data interconnection intercommunication with other unit equipment.
4, equipment communications security is high, when RSU is communicated by cellular network with cloud platform, is verified and is reflected by safety certificate
Power guarantees the reliability and safety of RSU communication data, while the exception information during logging component record RSU operation
Operation, timing return cloud platform analysis, guarantee the information security of RSU.
5, RSU sends the high-precision difference data of itself acquisition and the road local map letter of storage in remote deployment area
Breath, high accuracy positioning of the auxiliary vehicle when differential signal blind area is run.
Detailed description of the invention
Fig. 1 is the roadside device architecture diagram that the present invention provides that preferred embodiment is communicated based on V2X；
Fig. 2 is the message frame definition that application layer and communications layer components program are sent to middleware；
Fig. 3 is the inside structure of communication network management module；
Fig. 4 is messaging bus interface module work flow diagram；
Fig. 5 is the flow chart that message is sent；
Fig. 6 is message priority allocation strategy figure；
Fig. 7 is that RSU passes through communication module reception external message flow chart；
Fig. 8 is message distribution module distribution flow figure.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, detailed
Carefully describe.Described embodiment is only a part of the embodiments of the present invention.
The technical solution that the present invention solves above-mentioned technical problem is:
Fig. 1 is a kind of frame diagram of V2X roadside device software architecture, including 5 modules: communication network management module disappears
Cease proxy module, information security assembly module, log management assembly module, messaging bus interface module.
RSU car networking application program obtains highway traffic data by sensor and communication module, according to the agreement of formulation
Data after processing are filled into the message body content of message frame shown in Fig. 2, in the data received and dispatched by V2X module
Hold and filled with reference to J2735 or T/CSAE-2017 car networking application layer communication standard, to the data received and dispatched by other communication modules
According to producer's definition or custom protocol filling, type of message is distinguished by the message subject of message frame.
Communication network management module includes message-network mapping module, channel interface selecting module, data protocol modulus of conversion
Block.As shown in figure 3, message-network mapping module sets up the mapping table of a type of message and communication network type, remember in table
The corresponding relationship of various communication networks Yu theme message type is recorded, the application software to use heterogeneous networks to communicate provides unification
Communication calling interface.Channel interface selecting module sends corresponding communication channel interface for providing theme message.Communication network
Network management module is that each communication module sets up independent communication intercept thread, to handle obtaining by the message of the communication module
Take and parse work.The initial data that RSU communication module component acquires is converted to specified format by data protocol conversion module
Message packet is sent to messaging bus interface module.
Messaging bus interface module is responsible for establishing the message channel of application program and communication component communication, to application layer program
Communication interface is provided with communication network management module, receives the theme message and communication network management module of application layer program publication
The message that the communication component of transmission is sent, is sent to Message Agent module.As shown in Fig. 4, communicated for the first time in application program
When, application program and communication component send the request for establishing message channel to messaging bus interface module.Messaging bus is received
To after request, check Message Map check whether exist message channel corresponding with message, if there is then directly return disappear
Channel number is ceased, establishes message channel if not, the communication channel of application program and messaging bus can pass through TCP or UDP
Agreement is established.After application layer program and communication component establish message channel, needs to subscribe to message subject and theme issues type
It is stored into message issuer/Subscriber Information's table of RSU local data base.
Message Agent module is responsible for reading the message packet of messaging bus interface module, according to the hair of RSU local data base
Cloth person/Subscriber Information's table and reading message attributes, dynamically adjust the priority of message to be sent, are sent to and have subscribed this master
Inscribe the application layer applications or communication component of message.
Information security assembly module is responsible for data encryption and authentication ensures communication security, flat to RSU and car networking cloud
The long-range connection communication of platform carries out security verification, and the upgrading of RSU internal applications updates and remote control commands are according to storage
Local key can just be sent to application layer applications after carrying out safety and completeness check, verify exception information if it exists and then send
It is recorded to log management assembly module；
Log management assembly module is responsible for recording the unexpected message operation and day occurs that information security assembly module receives
Phase, application layer software periodically send log management file and analyze to cloud platform.
For above-mentioned Message Agent layer message distribution process, the present invention provides a kind of based on dynamic priority allocation
Message distributing method.
The message reception module of Message Agent module classifies to the message frame message that message bus interface module acquires
And parsing, the theme message content of message is sent to the message memory management module of Message Agent module, by disappearing in message
It ceases in attribute separation deposit local message attribute list.
As shown in figure 5, the message memory management module of Message Agent module is i and hair according to the message subject type received
Sending channel is the message M of jij, wherein i=1,2 ..., N, j=1,2 ..., K, N are that every a kind of type of message establishes independent message
Storage queue sum, K are the communication channel sum that message is sent, and judging whether there is and receiving type of message is i and sendaisle is j
Message queue Qij, if so, message is then stored in message queue Qij；If no, creating message queue Qij, form message team
Column collection:
Q={ { Q11,Q21,…QN1},{Q12,Q22,…QN2},…{Q1K,Q2K,…QNK}}
As shown in fig. 6, attribute of the message memory management module of local message broker program according to message in message queue
The current priority of message is calculated,When information has the property grabbed IqWhen=1, preferentially
Grade is set as highest priority, and q is affecting parameters of the emergency to information urgency, and a is message valid time to priority
Impact factor, b are impact factor of the urgency to priority, a < b and a+b=1.
As shown in fig. 7, the scheduling message distribution module of message broker program establishes K according to the quantity K of information sendaisle
A business sends thread, and each transmission thread establishes a transmit queue, and poll stores the preferential of the message queue of theme message
Grade, query communication network management module establish message-channel map, since high-priority queue extract theme message from
Corresponding communication channel is sent, until the message of high-priority queue is sent, starts to extract disappearing for next priority query
Breath is sent, and successively extracts the data of each priority query, until the data of all queues are sent.
As shown in figure 8, scheduling message distribution module does not make priority distribution, by looking into the message of communication component publication
Subscriber Information's table is ask, message distribution module extracts information and is sent to the application layer software for subscribing to the theme message, if message
From car networking cloud platform, information security assembly module carries out safety to the long-range connection communication of RSU and car networking cloud platform
And completeness check, unexpected message operation and date of occurrence are sent to the storage of log management assembly module.
The above embodiment is interpreted as being merely to illustrate the present invention rather than limit the scope of the invention.?
After the content for having read record of the invention, technical staff can be made various changes or modifications the present invention, these equivalent changes
Change and modification equally falls into the scope of the claims in the present invention.
Claims (10)
1. one kind be based on V2X roadside device system characterized by comprising communication network management module, Message Agent module,
Information security assembly module, logging component module and messaging bus interface module；Wherein,
Communication network management module: including message-network mapping module, channel interface selecting module and data protocol modulus of conversion
Block, the message-network mapping module provide unified communication calling interface for the application software communicated using heterogeneous networks；Institute
It states channel interface selecting module and issues corresponding communication channel interface for providing theme message；The data protocol conversion module
The message packet that the initial data that RSU communication module component acquires is converted to specified format, is sent to messaging bus interface mould
Block；
Messaging bus interface module；It is responsible for providing interface to application layer program and communication network management module, receives application layer and answer
The message sent with the communication component that the theme message and communication network management module of publication are sent, is sent to Message Agent mould
Block；
Message Agent module: being responsible for reading the message packet of messaging bus interface module, according to publisher/Subscriber Information's table and
The message attributes of reading dynamically adjust the priority of message to be sent, are sent to the application layer applications for having subscribed this theme message
Or communication component；
Information security assembly module: being responsible for data encryption and authentication ensures communication security, to RSU and car networking cloud platform
Long-range connection communication carries out security verification, and the upgrading of RSU internal applications updates the local with remote control commands according to storage
Key can just be sent to application layer applications after carrying out safety and completeness check, verify exception information if it exists and be then sent to day
Will management assembly module record；
Logging component module: being responsible for the unexpected message operation and date of occurrence that record information security assembly module receives,
Application layer software periodically sends log management file and analyzes to cloud platform.
2. according to claim 1 a kind of based on V2X roadside device system, which is characterized in that the Message Agent module
Use message based theme subscription-Issuance model, including message reception module, message memory management module, scheduling message point
Module, publish/subscribe module are sent out, message reception module is responsible for completing application layer software and bottom communication component is sent to middleware
Message frame reception, message memory management module stores each theme message and to needing through bottom communication interface to outgoing
The information sent carries out dynamic priority allocation, and the message of scheduling message distribution module advantage distillation high-priority queue sends, protects
The preferential busy channel of the high information of emergency is demonstrate,proved to send；To the theme message sent from bottom communication component, then pass through inquiry
Subscriber Information's table is sent to the application layer software for subscribing to the theme message；The publish/subscribe module of the Message Agent module
It is responsible for receiving registration, the de-registration request of the message subject of the connection of application layer software and communication component, realizes theme registration table master
The dynamic addition of topic, delete and Subscriber Information's table in subscriber addition, delete, record subscriber receives the logical of theme message
Road.
3. according to claim 1 a kind of based on V2X roadside device system, which is characterized in that the communication network management
Module sets up a message-channel map, and the corresponding relationship of various communication channels and type of message, message generation are recorded in table
The message distribution module for managing module finds corresponding communication channel by mapping table and carries out data distribution.
4. according to claim 2 a kind of based on V2X roadside device system, which is characterized in that the Message Agent module
Message memory management module be i according to the message subject type received and message M that sendaisle is jij, wherein i=1,
2 ..., N, j=1,2 ..., K, N are that every a kind of type of message establishes independent message storage queue sum, and K is what message was sent
Communication channel sum, judges whether there is the message queue Q for receiving that type of message is i and sendaisle is jij, if so, then by message
It is stored in message queue Qij；If no, creating message queue Qij, form message queue collection:
Q={ { Q11,Q21,…QN1},{Q12,Q22,…QN2},…{Q1K,Q2K,…QNK}}。
5. according to claim 2 a kind of based on V2X roadside device system, which is characterized in that the message storage management
Module calculates the current priority of message according to the attribute of message in message queue,S indicates that highest priority weight, T indicate that message effectively has the time, and τ is indicated
The urgent property coefficient of information, f indicate information transmission frequency, when information has the property grabbed IqWhen=1, it is preferential that priority is set as highest
Grade, q is affecting parameters of the emergency to information urgency, and a is impact factor of the message valid time to priority, and b is urgent
Spend the impact factor to priority, a < b and a+b=1.
6. according to claim 2 a kind of based on V2X roadside device system, which is characterized in that the breath scheduling distribution mould
Root tuber sends thread it is believed that the quantity K of breath sendaisle establishes K business, and each transmission thread establishes a transmit queue, takes turns
The priority of the message queue of inquiry storage theme message, message-channel map that query communication network management module is established, from
High-priority queue starts extraction theme message and sends from corresponding communication channel, until the message of high-priority queue has been sent
Finishing, the message for starting to extract next priority query is sent, the data of each priority query are successively extracted, until all queues
Data are sent.
7. a kind of information dispensing method based on system described in one of claim 1-6, which comprises the following steps:
S501: message-network mapping module establishes communication network-message subject mapping table, storage management bottom communication module
Message subject relationship corresponding to communication component sendaisle and receiving channel；Channel interface selecting module disappears for providing theme
Breath issues corresponding communication channel interface；The initial data that the data protocol conversion module acquires RSU communication component is converted
For the message packet of specified format, it is sent to messaging bus interface module；
S502: the report that the communication component that the theme message and communication network management module for receiving application layer applications publication are sent is sent
Text is sent to Message Agent module；
S503: the message reception module of Message Agent module classifies to the message frame message that message bus interface module acquires
And parsing, the theme message content of message is sent to the message memory management module of Message Agent module, by disappearing in message
It ceases in attribute deposit local message attribute list；
S504: the message memory management module of Message Agent module establishes individual reception queue storage for each subject information and disappears
Content is ceased, the information attribute in message attributes table is parsed, according to Priority Queuing algorithm and informed source, is dynamically distributed not
With the message priority weight of theme message queue；
S505: the priority of the message queue of the scheduling message distribution module poll storage theme message of Message Agent module is looked into
Message-channel map that communication network management module is established is ask, theme message is extracted since high-priority queue from correspondence
Communication channel send, until the message of high-priority queue is sent, start the message hair for extracting next priority query
It send, successively extracts the data of each priority query；
S506: to the message of communication component publication, by query subscription person's information table, message distribution module is extracted information and is sent to
The application layer software of the theme message is subscribed to, if message comes from car networking cloud platform, information security assembly module is to RSU and vehicle
The long-range connection communication for cloud platform of networking carries out safety and completeness check, and unexpected message operation and date of occurrence are sent to
The storage of log management assembly module.
8. information dispensing method according to claim 7, which is characterized in that the message frame message of the step S503 includes
Message content and the attribute for being under the jurisdiction of message, the attribute of message include initial priority, dynamic priority, effectively exist the time,
Sending cycle, the property grabbed, emergency.
9. a kind of information dispensing method based on V2X roadside device according to claim 7, which is characterized in that the step
The Priority Queuing algorithm of rapid S504 is subordinate to the message attributes of theme message by dissection process, assigns theme message not
Same priority weight assigns highest to the road hazard information of emergency message or the path sensor detection sent from cloud platform
Weights ensure that emergency message is preferentially sent.
10. a kind of information dispensing method based on V2X roadside device according to claim 7, which is characterized in that described
RSU directly takes the mode of message transparent transmission to communicate data by V2X the difference telegraph text data from high accuracy positioning base station
Broadcast.
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