CN107733459A - The vehicle-mounted T Box to be communicated based on DSRC and low-altitude satellite and its application - Google Patents
The vehicle-mounted T Box to be communicated based on DSRC and low-altitude satellite and its application Download PDFInfo
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- H—ELECTRICITY
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- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3822—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving specially adapted for use in vehicles
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- H—ELECTRICITY
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- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18517—Transmission equipment in earth stations
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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
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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Abstract
The invention provides a kind of vehicle-mounted T Box to be communicated based on DSRC and low-altitude satellite, data acquisition unit and wireless communication unit including interconnection, data acquisition unit is included from processor, and the data storage being connected with from processor, CAN, wireless communication unit includes primary processor, and DSRC communication modules, 4G communication modules, low-altitude satellite communication module, WiFi/BT modules, GPS/ Big Dipper locating modules, RTC real-time clock modules, battery management unit, memory module, voice module, codec module, human-computer interaction module and safety chip.The present invention using the DSRC communication technologys by realizing car and car, Che Yuren, multidate information real-time, interactive between car and roadside base station and shared.It is this that the control of vehicle safety active hedging and intelligent coordinated management to road can be realized based on full-time empty traffic dynamic information collection and integration technology, advantageously promote the development of wisdom traffic.
Description
Technical field
The invention belongs to car networking technology field, more particularly, to a kind of vehicle-mounted T- to be communicated based on DSRC and low-altitude satellite
Box。
Background technology
With data communication and the development of multimedia service demand, high-speed mobile data transmission, mobile computing and shifting are adapted to
Technology of New Generation Mobile Communications-low-altitude satellite communication technology that dynamic multimedia running needs starts to rise, and conventional satellite is from the ground
It is far, there are 36000 kms, network delay is big, and connection is slow, is unsuitable to apply in high speed network transmission, and low-altitude satellite is only disposed
In the place of 1200 kms from the ground, ground base station iron tower can be replaced, in terms of the visual field in high-altitude, traditional ground base station hair
The signal penetrated almost is propagated in horizontal direction, can be stopped by countless trees, building etc., final signal decay, and low-altitude satellite
The transmission of signal is from top to bottom, to be directly connected to user.Therefore have reason to expect that this mobile communication technology is brought more
Add fine future.
Traditional vehicle-mounted T-Box realizes the communication of vehicle using gprs system or the 4G communication technologys, and data transfer is communicated
The limitation of signal, it can not be communicated in the region of no signal or dtr signal, therefore single 4G mobile communications can not expire
The following car networking of foot develops the requirement to vehicle-mounted T-Box data transfers real-time and reliability.The low-altitude satellite communication technology goes out
The further development of car networking technology is now promoted, theoretical value 100Mbps transmission speed definitely disclosure satisfy that car networking pair
The requirement of message transmission rate.In addition, in general car networking terminal all uses plaintext transmission, face when carrying out data transmission
Face data be trapped, packet capturing, the risk of eavesdropping, cause enterprise-level secret leakage, or even cause user's life and property loss.So
The safety and reliability of data transfer seems most important.
DSRC is that Dedicated Short Range Communications (DSRC technology) are a kind of high
The wireless communication technology of effect, it can realize in specific region (being usually tens of rice) to the mobile target under high-speed motion
Identification and two-way communication, such as " Che-road " of vehicle, " Che-car " two-way communication, real-time Transmission image, voice-and-data information,
By vehicle and road organic linking.Application of the DSRC technology in intelligent transportation system, can significantly improve and improve people
Traffic trip efficiency.
In summary, the defects of development for existing car networking technology exists with equipment, is badly in need of a transmission speed more
It hurry up, reliability and safety is higher, and the more powerful car networking terminal of function meets the rapid development of intelligent transportation.
The content of the invention
In view of this, the present invention is directed to propose a kind of vehicle-mounted T-Box to be communicated based on DSRC and low-altitude satellite, passes through application
The DSRC communication technologys realize car and car, Che Yuren, multidate information real-time, interactive between car and roadside base station and shared.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of vehicle-mounted T-Box to be communicated based on DSRC and low-altitude satellite, include the data acquisition unit and nothing of interconnection
Line communication unit, the data acquisition unit include from processor, and with the data storage being connected from processor, CAN
Communication module, the wireless communication unit include primary processor, and the DSRC communication modules being connected with the primary processor, 4G
Communication module, low-altitude satellite communication module, WiFi/BT modules, GPS/ Big Dipper locating modules, RTC real-time clock modules, cell tube
Manage unit, memory module, voice module, codec module, human-computer interaction module and safety chip, the primary processor and institute
State between processor and connection is realized by SPI interface.
Further, instrument board information of the data acquisition unit by both sides CAN collection vehicle, each ECU shapes
State information and fault message, and the information collected is sent to by cloud platform by the 4G communication modules in wireless communication unit and entered
Row processing, and mobile terminal is sent the result to by WiFi/BT modules.
Further, the GPS/ Big Dippeves locating module in the wireless communication unit by 4G communication modules by the position of vehicle
Confidence breath is real-time transmitted to cloud platform or car transfer center.
Further, the wireless communication unit receives the data from cloud platform or user mobile phone, and converts it to
The message data that CAN can identify, realize the remote operation to vehicle.
Relative to prior art, a kind of vehicle-mounted T-Box to be communicated based on DSRC and low-altitude satellite of the present invention is had
Following advantage：The present invention effectively can access the vehicle in traveling the introducing of network, particularly low-altitude satellite communication, can be with
Realize that the vehicle of ground run is mutually direct-connected with aerial satellite, blocking to logical because of building or landform can be effectively prevented from
Believe influences caused by signal quality, it is ensured that the reliability and stability of signal transmission, realizes in-car net and mobile communications network
" high-speed bidirectional dialogue ", and then realize the remote real-time monitoring of cloud platform or mobile client to automobile, intelligent operation and rationally
Scheduling, by realizing car and car, Che Yuren, the multidate information real-time, interactive between car and roadside base station using the DSRC communication technologys
It is and shared.It is this to realize that vehicle safety active hedging controls with integration technology based on full-time empty traffic dynamic information collection
And the intelligent coordinated management to road, advantageously promote the development of wisdom traffic.
Another object of the present invention is to propose a kind of system for entering roadway collaboration using above-mentioned vehicle-mounted T-Box, with reality
Existing car and car, Che Yuren, multidate information real-time, interactive between car and roadside base station and shared.
In order to achieve the above object, the technical proposal of the invention is realized in this way：
It is a kind of to enter the system of roadway collaboration using above-mentioned vehicle-mounted T-Box, including vehicle-mounted T-Box vehicle is mounted with, with
And roadside unit, vehicle T-Box pass through communication vehicle for equipping vehicle-mounted T-Box same with other and roadside base station structure
Build mobile ad-hoc network and realize that data communicate.
A kind of beneficial effect and above-mentioned one of system for entering roadway collaboration using above-mentioned vehicle-mounted T-Box of the present invention
The beneficial effect for the vehicle-mounted T-Box that kind is communicated based on DSRC and low-altitude satellite is identical, will not be repeated here.
Another object of the present invention is to propose a kind of to enter the method for roadway collaboration using above-mentioned vehicle-mounted T-Box to realize
Car and car, Che Yuren, multidate information real-time, interactive between car and roadside base station and shared.
In order to achieve the above object, the technical proposal of the invention is realized in this way：
A kind of method for entering roadway collaboration using above-mentioned vehicle-mounted T-Box, the vehicle-mounted T-Box as sender pass through DSRC
Data or safe category information of peripherad vehicle or the roadside unit transmission frequency in the form of broadcast of module for 5.8GHz, warp
Service registration request, certification are crossed, after channel access distribution, establishes two-way data transfer, the vehicle-mounted T-Box roots as recipient
The message received according to Data Transport Protocol verification sender, by source codec after confirming the validity, sends a message to cloud platform
Handled, the message after processing is back to vehicle-mounted T-Box by cloud platform, and is shown by human-computer interaction module, and vehicle performs
Mechanism performs corresponding actions according to the output of recipient.
Further, the vehicle-mounted T-Box is sent a message to when cloud platform carries out data exchange with cloud platform by setting
Standby authentication center verifies, with the certified transmission key A K between the vehicle-mounted T-Box of root key encryption and cloud platform, device authentication center
Produce random number seed and random inquiry is sent to T-BOX safety chip；Safety chip passes through AES according to RS and AK
VA11 calculates session key, calculates response and export key by AES VA12 further according to RAND1, T-BOX will be counted
The RES1 calculated is sent to device authentication center；It is close that device authentication center according to RS and AK calculates session by algorithm VA11
Key, intended response and export key are calculated by algorithm VA12 further according to RAND1, RES1 that cloud platform sends T-BOX with
The XRES1 calculated is compared, if value is equal, it is true to set operation result R1, and is sent to T-BOX, device authentication
Success.
A kind of beneficial effect and above-mentioned one of system for entering roadway collaboration using above-mentioned vehicle-mounted T-Box of the present invention
The beneficial effect for the vehicle-mounted T-Box that kind is communicated based on DSRC and low-altitude satellite is identical, will not be repeated here.
Brief description of the drawings
The accompanying drawing for forming the part of the present invention is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the system block diagram of the vehicle-mounted T-BOX described in the embodiment of the present invention；
Fig. 2 is the vehicle-mounted T-BOX data acquisition units structured flowchart described in the embodiment of the present invention；
Fig. 3 is the vehicle-mounted T-BOX wireless communication units structured flowchart described in the embodiment of the present invention；
Fig. 4 is the functional block diagram of the vehicle-mounted T-BOX described in the embodiment of the present invention
Fig. 5 is the functional structure chart of the vehicle-mounted T-BOX described in the embodiment of the present invention；
Fig. 6 is the bus or train route cooperative system schematic diagram based on vehicle-mounted T-BOX described in the embodiment of the present invention；
Fig. 7 is to collision detection algorithm flow chart before vehicle described in the embodiment of the present invention；
Fig. 8 is the switch safety certification process schematic diagram of the vehicle-mounted T-BOX described in the embodiment of the present invention；
Fig. 9 is the vehicle-mounted T-BOX remote controls short-message verification schematic diagram described in the embodiment of the present invention.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " on ", " under ",
The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than instruction or dark
Show that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, thus it is it is not intended that right
The limitation of the present invention.In addition, term " first ", " second " etc. are only used for describing purpose, and it is not intended that instruction or hint phase
To importance or the implicit quantity for indicating indicated technical characteristic.Thus, the feature for defining " first ", " second " etc. can
To express or implicitly include one or more this feature.In the description of the invention, unless otherwise indicated, " multiple "
It is meant that two or more.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in the present invention.
Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Fig. 1 is the vehicle-mounted T-BOX of present invention hardware composition frame chart, as shown in figure 1, vehicle-mounted T-Box of the present invention is hard
Part uses dual processor architecture design, and the Freescal i.MX6 single-chip microcomputers based on Cortex A9 kernels are as primary processor CPU
Chip, running frequency 1.2GHz, Freescal MPC5604B are used as from processor MCU chip, running frequency 64MHz.
Realized and interconnected by SPI interface between CPU and MCU.It is mainly by data acquisition unit and wireless communication unit two large divisions's group
Into.
The data acquisition unit is included from processor (MPC5604), data storage (FRAM) and CAN.
The wireless communication module includes primary processor (Freescal i.MX6), DSRC communication modules, 4G communication modules,
Low-altitude satellite communication module, WiFi/BT modules, GPS/ Big Dipper locating modules, RTC real-time clock modules, battery management unit
(PMU), memory module (EMMC and LPDDR), voice module, codec module, human-computer interaction module, safety chip.
The data acquisition unit passes through the instrument board information of the real-time collection vehicle of two-way CAN, each ECU status informations
With fault message etc., and the information collected is sent at cloud platform by the 4G communication modules in wireless communication unit
Reason analysis, and mobile terminal is sent the result to, such as the mobile device such as notebook, mobile phone, Pad, different mobile devices are fitted
Close different librarian uses.The information that wherein data storage (FRAM) will collect when wireless communication unit can not receive data
Store, until wireless communication unit can normal work when complete data transmission.
By adding low-altitude satellite communication module in the wireless communication unit, the vehicle and sky of ground run can be realized
In satellite it is mutually direct-connected, establish data transfer reliably, blocking to logical because of building or landform can be effectively prevented from
Believe influences caused by signal quality, and low-altitude satellite relies on smaller liftoff interval, using the teaching of the invention it is possible to provide more faster than conventional satellite communication
Transmission speed, average transmission speed can reach 50-100Mbps, be fully able to meet car networking for data transfer real-time
Requirement.In addition, by sending more low-altitude satellites, it is possible to achieve all standing of the low latitude to ground signal of communication, further really
Protect the stability and reliability of low latitude signal of communication.In view of the quantity of low-altitude satellite can not realize signal all standing at present, thus it is logical
Letter unit realized by the way of 4G communication modules are combined with low-altitude satellite communication module, be embodied in 4G communication patterns with it is low
Empty satellite communication mode can switch according to the strong and weak automatic seamless of current each signal, it is ensured that network connects vehicle when driving
The reliability connect.The wireless communication unit by communication module to high in the clouds transmit data while, also can be directly logical by data
Cross WiFi/BT modules to be sent directly in user mobile phone, in addition, WiFi/BT modules can also be in-car by 4G modules
Wi-Fi hotspot is provided.GPS/ Big Dippeves locating module in the wireless communication unit is by communication module by the positional information of vehicle
It is real-time transmitted to cloud platform or car transfer center.
The wireless communication unit can also receive the data from cloud platform or user mobile phone, and convert it to CAN
The message data that bus can identify, realize the remote operation to BCM and vehicle, such as electronic grille fence, remote vehicle tracking, hypervelocity
Remind, remote switch door lock, open air-conditioning, turn on light.
DSRC modules are used to establish between Che-car in the wireless communication unit, the wireless telecommunications connection between Che Yulu,
Data of the vehicle-mounted T-Box by peripherad vehicle or the roadside unit transmission frequency in the form of broadcast of this module for 5.8GHz
Or safe category information, by a series of service registration requests, certification.After channel access distribution, both sides can establish two-way
Data transfer, after the completion of data interaction, terminate to link by service deregistration.By such a link, neighbouring vehicle can
To share the status information of itself, positional information etc., so as to support widely to interconnect automobile, cooperating type intelligent transportation and drive automatically
Automobile application is sailed, as collision avoids early warning, blind area detection, emergency vehicle information announcement, collaborative intelligent traffic lamp, fleet
Vehicle collaboration, intelligent transportation facility etc..
Fig. 2 is the vehicle-mounted T-BOX data acquisition units structured flowchart of the present invention, including from processor (MPC5604), data are deposited
Store up (FRAM) and CAN.These modules and function are described in detail below.
CAN：CAN uses the high-speed CAN transceiver of automotive grade, complies fully with ISO11898 standards
It low-power consumption mode, can be waken up by bus, reserve two-way CAN interface, Configuration of baud rate optional 250K and 500K.For adopting in real time
Collect the meter panel of motor vehicle information in CAN, travel condition of vehicle information, fault message etc..Data be vehicle remote monitoring with
The basis of control.
Data storage (FRAM)：The information collected is stored when wireless communication unit can not receive data, directly
To wireless communication unit can normal work when complete data transmission, storage data having time sign.As automobile has just started
When, from processor (MPC5604) by CAN data acquisition, and grasped built in the primary processor of wireless communication unit
Make system, startup is slower, and the data that can not be collected cause loss of data, easily cause potential safety hazard.Now data are deposited
Storage (FRAM) can store the information collected, treat that wireless communication unit starts completely, then data are uploaded, so that it is guaranteed that
The Integrity And Reliability of data.
Fig. 3 is the vehicle-mounted T-BOX wireless communication units structured flowchart of the present invention, including primary processor (Freescal
I.MX6), 4G communication modules, low-altitude satellite communication module, DSRC communication modules, WiFi/BT modules, GPS/ Big Dipper locating modules,
RTC real-time clock modules, battery management unit (PMU), memory module (EMMC and LPDDR), voice module, codec module,
Human-computer interaction module, safety chip.These modules and function are described in detail below.
4G communication modules:Using Huawei's ME909s-821LTE communication modules, it can support the interface of high speed USB 2.0, convenient
Other modules carry out data exchange with terminal.Based on 4G communication modules vehicle can be made to establish wireless connection with 4G communication base stations, entered
And realize the data transfer of vehicle and high in the clouds, OTA remotely write with a brush dipped in Chinese ink, vehicle remote manipulation, the function such as remote diagnosis, really realizing will
Vehicle access network in environment.
Low-altitude satellite communication module：The vehicle of ground run is realized using the low-altitude satellite communication module of latest domestic development
It is mutually direct-connected with aerial satellite, data transfer reliably is established, blocking because of building or landform can be effectively prevented from
Smaller liftoff interval is relied on influence, low-altitude satellite caused by communication signal quality, using the teaching of the invention it is possible to provide than conventional satellite communication more
Fast transmission speed, average transmission speed can reach 50-100Mbps, be fully able to meet that car networking is real for data transfer
The requirement of when property.In addition, by sending more low-altitude satellites, it is possible to achieve all standing of the low latitude to ground signal of communication, enter one
Step ensures the stability and reliability of low latitude signal of communication.In view of the quantity of low-altitude satellite can not realize signal all standing at present,
Therefore communication unit is realized by the way of 4G communication modules are combined with low-altitude satellite communication module, is embodied in 4G communication patterns
It can be switched with low-altitude satellite communication pattern according to the strong and weak automatic seamless of current each signal, it is ensured that vehicle net when driving
The reliability of network connection.
WiFi/BT modules:Using the LBEE6U4ZQC flush bonding modules for meeting network standard based on USB,
Built-in ICP/IP protocol stack, the data conversion between 2 user's serial ports, wireless network (Wi-Fi) interfaces can be realized；Meet
The wireless standards such as IEEE802.1 1a/b/g/n/ac；Wi-Fi hotspot can be in the car provided, improve riding experience；Also can pass through
The car status information collected is sent directly to user mobile phone by WiFi or bluetooth.
GPS/ Big Dipper locating modules:Using Switzerland Co., Ltd u-blox release the navigation of NEO-M8L automobile inertials (ADR,
Automotive Dead Reckoning) module, this is module integrated motion, direction and height sensor, it possesses module peace
The characteristics such as dress is not limited by directionality, mileage table function and self-contained data record, urban district that Neng stands in great numbers in building, tunnel,
There is provided in the stringent environmentals such as basement parking lot reliably with unbroken positioning function.In addition, the module can follow the trail of all
Visual GNSS satellite, including GPS, GLONASS, the Big Dipper and all SBAS systems, and can be to be up to the speed of 20 times per second
Degree output location information, remote monitoring and navigation for vehicle provide positional information.
DSRC communication modules:Using the DSRC modules of Cohda and NXP joint developments as core, peripheral interface circuit group is extended
Into DSRC communication modules, IEEE 802.11p agreements can be supported, can in larger distance range at a high speed, reliably exchange letter
Breath, shorten ' response time ', traditional application is significantly faster than that especially with respect to the information transmission of potential danger and vital situation.
In addition, preventing assault and data theft for protection interconnection automobile, the module is also integrated with NXP for the whole of V2X securities
Solution is closed, including hardware security module (HSM) and checking accelerate.
RTC real-time clock modules:Clock is provided in real time for vehicle-mounted T-BOX, and timestamp is provided for the data of transmission.And provide
Time synchronized function.
Battery management unit (PMU)：PMU is a kind of highly integrated, for portable use power supply pipe
Reason scheme, if Ganlei's Power Management Devices of traditional discrete are incorporated within single encapsulation, so it can be achieved higher
Power supply conversion efficiency and more low-power consumption, and less package count with adapt to reduce plate level space.Meet that 9-36V is inputted, be T-
Power supply needed for BOX offers.
Memory module (EMMC):Using model MTFC8GLVEA EMMC chips its have small volume, occupy little space,
The characteristics such as high-speed transfer.NAND Flash, the high performance controller of high power capacity are not only carried, and it is powerful.And use
The EMMC interfaces of JEDEC standard.Memory module based on EMMC can realize following functions:
1. data backup：Data backup function can will upload to the data backup of cloud platform, to download when needed
Check.
2. parameter setting：T-BOX some arrange parameters are stored, are such as used for the beacon information for identifying car-mounted terminal.
3. write with a brush dipped in Chinese ink program storage：When entering line program to T-BOX and remotely writing with a brush dipped in Chinese ink, the program write with a brush dipped in Chinese ink can first be stored EMMC
In, the program for subsequently completing system or each CAN nodes is write with a brush dipped in Chinese ink.
Voice module and codec module:Voice service is provided for passenger or passes through the demand for services of passenger
Encoding speech information uploads to high in the clouds, can also receive the data from high in the clouds, and decode it and be supplied to user for voice messaging.
And the long-range rescue services of e-call can be provided.
Fig. 4 is the vehicle-mounted T-BOX of present invention functional block diagram, and it is active to describe the institute that the vehicle-mounted T-BOX of the present invention can be realized
Energy.Fig. 5 is the vehicle-mounted T-BOX of present invention functional structure chart, as shown in figure 5, vehicle passes through the real-time collection vehicles of vehicle-mounted T-BOX
The information such as the demand for services of status information, positional information and passenger, and upload to high in the clouds by communication module data and put down
Platform.Vehicle-mounted T-BOX can also receive the data from cloud platform, and vehicle control data is converted into what CAN can recognize that
Message data, so as to realize the remote control of vehicle.Cloud platform analyzes and processes to receiving data, can be concerned about user
Information be sent directly to user mobile phone, provide the user more facilities, intelligence, the service of diversification；Vehicle manufacture company
Monitoring client can obtain data from cloud platform, the vehicle-state and fault message of vehicle be understood, to provide the user more increasings
Value service；Car transfer center also can obtain vehicle data from cloud platform, so as to the reasonable arrangement magnitude of traffic flow, effectively alleviate traffic
Pressure, more convenient traffic path is provided for car owner.
Fig. 6 is the bus or train route cooperative system schematic diagram based on vehicle-mounted T-BOX in the present invention, as shown in fig. 6, the system is by equipping
Vehicle-mounted T-Box vehicle and roadside unit (being referred to as roadside base station (RSU)) composition.Vehicle-mounted T-Box is by being exclusively used in cooperative intelligence
(short distance) wireless communication module and other potential optional communication modes of energy traffic and road safety are realized same with other
Sample equips vehicle-mounted T-Box vehicle and roadside base station structure mobile ad-hoc network (MANET).Built by vehicle-mounted T-Box
Mobile ad-hoc network allows to communicate in a manner of fully distributed between node, coordinates example without concentrating.If section
Wireless connection between point is present, and board units are by Direct Communication.If without directly connecting, special Routing Protocol allows
Multihop network communicates, and such data are forwarded to other vehicle-mounted T-Box from a vehicle-mounted T-Box, until reaching its destination.
The main task of roadside base station improves road safety and by being sent out in self-organizing network field by performing specific application program
Send, receive or forward data to extend the coverage of self-organizing network.
Based on special short distance home control network communication protocol, one is provided by the bus or train route cooperative system that core is built of vehicle-mounted T-Box
The individual packet switching network in conventional wireless environment between mobile node and providing of being similar to is similar to unicast in legacy network, more
Broadcast, the communication type of Anycast and broadcast.But traditional wireless communication is all typically to be propagated centered on sender, bus or train route collaboration
System is then that data dissemination is carried out centered on recipient, in the propagation centered on recipient, local that source node passes through it
Sensor detection risk and the neighbors distribution information to it.Neighbors merges these information and its local information state,
And the information of merging is distributed to their neighbors.The space of information and the opportunity of distribution are by the reception section as conveyer
Point control, after information is received, receiving node determines information for the correlation of neighbors and decides whether to distribute this
Information.In addition, by the addressing side based on geographical position that vehicle-mounted T-Box is the bus or train route cooperative system application novelty that core is built
Case.Substantially, two kinds of geographical addressing is defined：First, different node address (i.e. V2X communication network address) is with saving
The physical location of point is relevant.Forwarding algorithm uses this position to destination node transmission packet.Second, use geographical position base
Geographic area (such as circular, rectangle) is defined in geometry.Geographic area can be connected with node, be addressed in region all
Any node in node or addressed areas.
According to the basic communication of above-mentioned bus or train route cooperative system rule and addressing method, data between vehicle-mounted T-Box have been formulated
The forwarding algorithm of bag, including geographical unicast, the interior broadcast (TSB) of topological field, geographical broadcast and geographical Anycast.Geographical unicast is to be used for
Propagated from a single node (source) to the Single-wire data of a single node (purpose), pass through the address specified based on DSRC communications
(including node identifier, geographical position, temporal information) direct communication passes through Multiple hop and completes forwarding.Broadcasted in topological field
It is to be used for the data transfer from a single node (source) to all nodes in vehicle self-organizing coverage.Geographical broadcast is
For from a single node to the data dissemination of all nodes in target area.It is with broadcast in topological field on the contrary, geographical wide
It is by geographical region definition to broadcast target area scope.Wherein geographic area is defined successively by geometry, such as circular
And rectangle.Geographical Anycast is the data dissemination from a single node to arbitrary node in geographic area.Compared with geographical broadcast,
In geographical Anycast after packet reaches the node in region, packet will not be forwarded.
With reference to the addressing system and data packet forwarding of above-mentioned bus or train route cooperative system, it is indicated that the car described in accompanying drawing
Road cooperates with use-case specific implementation and operation principle, the class exchanged based on requirement of these use-cases for security and information
Type, they are assigned to 4 " application programs ".Therefore, these application programs provide general mechanism for any amount of use
Example uses.Requirement and the general mechanism of each application program are described below.
(1) Che-car cooperation, this application support vehicle among each other without sharing information under lasting communication link
It is required that vehicle or the vehicle in region that vehicle is sent data near all by broadcast or region radio hookup respectively, are realized
Information of vehicles is shared.This application program includes 3 application examples：Sender, recipient and vehicle executing agency.Wherein send out
The person of sending and recipient are played the part of by the vehicle-mounted T-Box of interactive vehicle respectively, and wherein sender needs to obtain the sheet of phase application examples requirement
Ground vehicle data, including speed and acceleration-deceleration information, the vehicle heading and deviation angle, vehicle-state and fault message, car
High accuracy positioning and traveling lane information etc., these information are obtained by onboard sensor and other smart machines, by vehicle-mounted
Industry ethernet or conventional CAN are transferred to vehicle-mounted T-Box；The vehicle-mounted T-Box as sender is by local vehicle number afterwards
Message is packaged into according to according to J2735 special short distance Data Transport Protocols, using broadcast or the mechanism that multicasts of region by message
It is sent to neighbouring vehicle.Vehicle-mounted T-Box as recipient is verified from what sender received according to Data Transport Protocol to disappear
Breath, by source codec be remote vehicle data after confirming the validity, then according to the content of the requirement of concrete use case assessment message, car
Executing agency takes appropriate action according to the output of recipient.To illustrate the application program to conflict alert use-case before cooperation
Specific implementation, the mechanism that the vehicle of road traveling is multicasted using broadcast or region as requested send vehicle letter
Breath, neighbouring vehicle to collision detection algorithm assess threat of other vehicles to oneself vehicle before being performed after information is received.
Forward direction collision detection algorithm as shown in fig. 7, the data and local collection vehicle data that the algorithm is sent using sender as input, it is right
Than the current lane information of neighbouring vehicle, speed and plus/minus velocity information and high accuracy positioning information simultaneously calculate the critical of vehicle
Safe distance, shown in conventional critical safe distance calculation formula such as formula (1).
(1)
D in formulawTo be preceding to collision warning distance；Vf、af、Vl、alThe respectively speed and deceleration of front truck and rear (oneself) car.
If algorithm detects that the two cars in same track can produce potential forward direction with current acceleration or deceleration and collide, vehicle-mounted T-
This result can be sent to Human-machine interface by Box by USB interface, give driver one warning.In addition, it is based on the application
The use-case that program is realized also includes cooperation adaptive learning algorithms, warning etc. of overtaking other vehicles.
(2) Che-car decentralized environment notice, this application program are provided on event and the information of roadway characteristic, these
Information be driver specific region and in the time it is interested.This application program includes 3 application examples：Monitor,
Sender, recipient.Monitor mainly includes infrastructure, such as traffic surveillance and control system on existing road, it is seen that property sensor, bridge
On wind sensor, road information warning etc., monitor is connected by internet after related data is collected and sends out message
It is sent to neighbouring roadside unit (RSU), message includes distributed constant (such as priority, validity), authentication data (such as is signed
Name), position and using standardization risk classifications scheme describe event and road information.Then roadside unit (RSU) is played the part of
The role of sender, the mechanism to be multicasted using broadcast or region send a message to the vehicle of surrounding or in a geographic area
Vehicle.The message while the validity of confirmation message that the vehicle-mounted T-Box of vehicle receives as recipient's decoding, are preserved effective
Message simultaneously abandons invalid message.Then similar events or road information are described according to the risk classifications scheme cluster of standardization
Message, the information of aggregated pattern is paid the utmost attention to, and Human-machine interface is delivered to limit priority.In the application program,
Message contains the information on event and road conditions.Pay attention to road conditions can be it is static or dynamic, (such as sleet-static state,
Traffic jam-dynamic).Each message package is containing the information on a single incident or road conditions, in order to which independent releases news.
Each message is made up of following 3 part：
Parameter for message management：This information is used for the independent process for meeting message.It is included：One it is random and
Unique message id.Due to the generation message id of vehicle independence, it is impossible to ensure complete uniqueness unless it includes position
And temporal information, this will cause the ID that grows very much.Therefore system must avoid ID from repeating.The timestamp of message, priority, promoter
The reliability of the message of setting, the limitation of target area, expiration time.
Positional information：This information is necessary, for cluster information and helps driver to identify related news.Therefore,
The positional information of different messages must be matched and the driving path of oneself must and match messages.In order to realize matching, not only
Event location is added in message and to increase location tracking descriptor.This tracked information must be with special numeral
Map coordinates.
Event and traffic information：Event and traffic information use standardization, expansible scheme code.
Illustrate the specific implementation of the application program with danger early warning use-case below, monitor monitoring as traffic accident or
Event as dangerous situation.In order to avoid information is lost, hazard event message can be sent to accident in time and sent by detector
Roadside unit in region, roadside unit is in incident area and broadcast traffic accident hazard early warning information in the specific time.Area
Vehicle in domain receives the message and the decoding of completion message and the cluster of similar events of broadcast by vehicle-mounted T-Box, then will
Danger early warning event is delivered to Human-machine interface by USB and is submitted to driver's (for example, the sense of hearing, vision and tactile).In addition,
Based on the application program realize use-case also given warning in advance including traffic congestion, hazardous location Che-car notice, security service point, blind area
Warning etc..
(3) (unidirectional) communication of infrastructure-car, this application program support that nothing is held between vehicle and roadside base station (RSU)
From roadside base station (RSU) to the communication of vehicle during continuous communication link.The application program can neither establish two-way communication link
It can not receive and forward warning against danger.These will be realized by Che-car distributed environment notice.Application includes 2 should
Use example:Roadside unit (RSU) and vehicle-mounted T-Box.Wherein roadside unit (RSU) is assisted as sender according to DSRC data transfers
The data for needing to broadcast are packaged into short message by view, then send a message to surrounding vehicles using broadcast mechanism.Vehicle-mounted T-Box
As recipient's message for receiving of checking and by source codec into long-range RSU data, then required to assess message according to use-case
Content.And assessment result is delivered to Human-machine interface.The realization broadcasted use-case and illustrate the application program is limited with speed
Mode, dynamic restricted speed sign show different limitations, the RSU in the region according to special circumstances such as the time on the same day or traffic jams
By message of the periodically broadcast packet containing rate limitation.In addition, message by comprising the extra information on rate limitation for example
Its geography or orientation limitation.Vehicle in region receives the decoding of completion message after broadcast message by vehicle-mounted T-Box, will disappear
The local data of some geographical or orientation limitations and vehicle in breath is compared to determine whether application speed limits local vehicle
System.If the car speed of T-Box collections exceedes current limitation speed, hypervelocity information can be sent to vehicle by T-Box by USB
Man-machine interface sends a warning to driver.In addition, green light optimum speed is also included based on the use-case that the application program is realized
Consulting, hazardous location I2V notices etc..
(4) Che-car unicast is exchanged, and this application program can enable the communication chain for being used between two cars exchange information
Road.This application is made up of 4 different stages：It was found that, connection, safeguard and close.Discovery phase refers to that a vehicle determines
Connect the stage of other vehicles.A request, which is initiated, in subsequent access phase vehicle is sent to other vehicles so as to open one
Connection.Other vehicles are necessary to decide whether to allow this connection.Maintenance phase is while two vehicles are exchanging data
Connection is kept to open.Dwell period is when one in two vehicles determines to stop exchanging data and closes connection.Promoter will
Send a connection request to target vehicle, once connection be established, promoter have to carry out realize needed for use-case duplex or
Two-way communication protocol.This includes information of vehicles being packaged into message and sends message in the suitable time, and promoter may be with
When close connection.Respondent should respond all connection requests, receive or refuse.When the connection with some promoter is built
Vertical, respondent should perform the duplexing or two-way communication protocol realized needed for use-case.This includes information of vehicles being packaged into disappearing
Cease and send message in the suitable time.Respondent from Vehicular system solicited message and should send information to depending on the situation of use-case
Vehicular system, respondent may close connection at any time.The application is generally used for the timely communication established between vehicle.
Fig. 8 is the vehicle-mounted T-BOX of present invention switch verification process schematic diagram, and vehicle-mounted T-BOX enters with cloud platform
Device authentication central authentication must be passed through during row data exchange, recognized with the vehicle-mounted T-BOX of root key encryption and the transmission between platform
Demonstrate,prove key A K.Device authentication center produces random number seed (RS) and random inquiry (RAND1) is sent to T-BOX safe core
Piece；Safety chip calculates session key (KS) according to RS and AK by AES VA11, is calculated further according to RAND1 by encrypting
Method VA12 calculates response (RES1) and export key (DCK1), and the RES1 calculated is sent to device authentication center by T-BOX；
Device authentication center calculates session key (KS) according to RS and AK by algorithm VA11, passes through algorithm VA12 further according to RAND1
Calculate intended response (XRES1) and export key (DCK1).Platform enters the RES1 that T-BOX is sent with the XRES1 calculated
Row compares, if value is equal, it is true to set operation result R1, and is sent to T-BOX, device authentication success.
Fig. 9 is the vehicle-mounted T-BOX remote controls short-message verification schematic diagram of the present invention, is performed far by vehicle-mounted T-Box in user
The two-factor authentication of people and service centre need to be completed during the high-risk application such as Cheng Kaisuo or control.User passes through cell phone application medium-long range
Control service sends service request to cloud platform service centre, and service centre is random raw by inquiring about the reserved cell-phone number transmission of user
Into short message verification code, the identifying code that receives of user's input completes checking.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (7)
- A kind of 1. vehicle-mounted T-Box to be communicated based on DSRC and low-altitude satellite, it is characterised in that：Data acquisition including interconnection Unit and wireless communication unit, the data acquisition unit include from processor, and with the data being connected from processor Storage, CAN, the wireless communication unit includes primary processor, and leads to the DSRC that the primary processor is connected Believe module, 4G communication modules, low-altitude satellite communication module, WiFi/BT modules, GPS/ Big Dipper locating modules, RTC real-time clock moulds Block, battery management unit, memory module, voice module, codec module, human-computer interaction module and safety chip, the master Processor and it is described between processor pass through SPI interface realize connect.
- A kind of 2. vehicle-mounted T-Box to be communicated based on DSRC and low-altitude satellite according to claim 1, it is characterised in that：Institute Instrument board information, each ECU status information and fault message of the data acquisition unit by both sides CAN collection vehicle are stated, and The information collected is sent into cloud platform by the 4G communication modules in wireless communication unit to be handled, and passes through WiFi/ BT modules send the result to mobile terminal.
- A kind of 3. vehicle-mounted T-Box to be communicated based on DSRC and low-altitude satellite according to claim 1, it is characterised in that：Institute The positional information of vehicle is real-time transmitted to cloud by the GPS/ Big Dippeves locating module stated in wireless communication unit by 4G communication modules Platform or car transfer center.
- A kind of 4. vehicle-mounted T-Box to be communicated based on DSRC and low-altitude satellite according to claim 1, it is characterised in that：Institute State wireless communication unit and receive the data from cloud platform or user mobile phone, and convert it to the report that CAN can identify Literary data, realize the remote operation to vehicle.
- A kind of 5. system for entering roadway collaboration using above-mentioned vehicle-mounted T-Box, it is characterised in that：Including being mounted with vehicle-mounted T-Box Vehicle, and roadside unit, vehicle T-Box by communication vehicle for equipping vehicle-mounted T-Box same with other and Roadside base station structure mobile ad-hoc network realizes that data communicate.
- A kind of 6. method for entering roadway collaboration using above-mentioned vehicle-mounted T-Box, it is characterised in that：Vehicle-mounted T- as sender Data or peace of the Box by peripherad vehicle or the roadside unit transmission frequency in the form of broadcast of DSRC modules for 5.8GHz Universal class information, by service registration request, certification, after channel access distribution, two-way data transfer is established, as recipient's The message that vehicle-mounted T-Box receives according to Data Transport Protocol verification sender, by source codec after confirming the validity, message is sent out Deliver to cloud platform to be handled, the message after processing is back to vehicle-mounted T-Box by cloud platform, and by human-computer interaction module is shown Show, vehicle executing agency performs corresponding actions according to the output of recipient.
- A kind of 7. method for entering roadway collaboration using above-mentioned vehicle-mounted T-Box according to claim 6, it is characterised in that： The vehicle-mounted T-Box, which is sent a message to when cloud platform carries out data exchange with cloud platform, passes through device authentication central authentication, uses Certified transmission key A K between the vehicle-mounted T-Box of root key encryption and cloud platform, device authentication center produce random number seed and Random inquiry is sent to T-BOX safety chip；It is close that safety chip according to RS and AK calculates session by AES VA11 Key, response and export key are calculated by AES VA12 further according to RAND1, the RES1 calculated is sent to by T-BOX Device authentication center；Device authentication center calculates session key according to RS and AK by algorithm VA11, passes through further according to RAND1 Algorithm VA12 calculates intended response and export key, and cloud platform compares the RES1 that T-BOX is sent with the XRES1 calculated Compared with if value is equal, it is true to set operation result R1, and is sent to T-BOX, device authentication success.
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