CN108966178A - Communication system and method based on vehicular ad hoc network - Google Patents

Communication system and method based on vehicular ad hoc network Download PDF

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Publication number
CN108966178A
CN108966178A CN201810429404.0A CN201810429404A CN108966178A CN 108966178 A CN108966178 A CN 108966178A CN 201810429404 A CN201810429404 A CN 201810429404A CN 108966178 A CN108966178 A CN 108966178A
Authority
CN
China
Prior art keywords
user information
module
signal
demodulating
dipole antenna
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810429404.0A
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Chinese (zh)
Inventor
王彦波
戴波
姚杨
姚一杨
梅峰
邱兰馨
章振海
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Zhejiang Electric Power Co Ltd
Information and Telecommunication Branch of State Grid Zhejiang Electric Power Co Ltd
Original Assignee
State Grid Zhejiang Electric Power Co Ltd
Information and Telecommunication Branch of State Grid Zhejiang Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Zhejiang Electric Power Co Ltd, Information and Telecommunication Branch of State Grid Zhejiang Electric Power Co Ltd filed Critical State Grid Zhejiang Electric Power Co Ltd
Priority to CN201810429404.0A priority Critical patent/CN108966178A/en
Publication of CN108966178A publication Critical patent/CN108966178A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30Services specially adapted for particular environments, situations or purposes
    • H04W4/40Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/44Services 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]
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/20Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W12/00Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/02Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII]

Abstract

The present invention relates to the communications fields, more particularly to a kind of communication system and method based on vehicular ad hoc network, the system includes the signal emission module for being mounted on intelligent vehicle and the signal receiving module for being mounted on roadside unit, the signal emission module includes the first microcontroller, first dipole antenna, code modulation module and encrypting module, the signal receiving module includes the second dipole antenna, demodulating and decoding module, deciphering module and the second microcontroller, first dipole antenna obtains ambient radio-frequency signal and is converted into electric energy, energy is provided for the operation of signal emission module.By using the present invention, following effect may be implemented: obtaining energy from ambient radio-frequency signal and carry out driving equipment, in addition wiring that additional power supply unit power supply does not need power supply unit and signal emission module yet is not needed, failure caused by due to the aging of wiring is avoided;It is encrypted in the transmission process of signal, it is ensured that the safety communicated in vehicular ad hoc network.

Description

Communication system and method based on vehicular ad hoc network
Technical field
The present invention relates to the communications field more particularly to a kind of communication systems and method based on vehicular ad hoc network.
Background technique
Vehicular ad hoc network (VANET) is a mobile communication facility network, with vehicle on the move and roadside unit For node, using wireless communication technique such as bluetooth, WiFi, WiMax etc., to form mobile network.
In the communication process of existing intelligent vehicle and roadside unit, the signal emission module in vehicle passes through vehicle Power supply unit in is powered.It is powered by power supply unit, needs to increase the connection of route, route can be due to service life Etc. reasons there are the failures such as short circuit, signal can not be sent so as to cause signal emission module.Further, since in communication process not To signal encryption, cause to communicate dangerous, and is easy interference by ambient radio-frequency signal.
Summary of the invention
To solve the above problems, the present invention propose it is a kind of without additional power supply unit power supply and communication security based on vehicle-mounted The communication system and method for self-organizing network.
A kind of communication system based on vehicular ad hoc network, including be mounted on intelligent vehicle signal emission module and It is mounted on the signal receiving module of roadside unit, the signal emission module includes the first microcontroller, the first dipole antenna, compiles Code modulation module and encrypting module, the signal receiving module include the second dipole antenna, demodulating and decoding module, deciphering module And second microcontroller;Wherein, first microcontroller is used to export user information according to input signal;The coding is adjusted Molding block is used to user information carrying out coded modulation;The encrypting module is for adding the user information after coded modulation It is close;First dipole antenna is used to obtain the ambient radio-frequency signal in vehicular ad hoc network and be converted into electric energy, and For sending encrypted user information;Second dipole antenna is for receiving encrypted user information;The solution is reconciled Code module carries out demodulating and decoding to encrypted user information;The deciphering module be used for the user information after demodulating and decoding into Row decryption;Second microcontroller is used to obtain the user information after decryption, and according to user information control roadside unit Work.
Preferably, the signal emission module includes reflected radio switch, reflected radio switch first dipole of connection Antenna is used to modulate the impedance of the first dipole antenna, to change the energy of the first dipole antenna reflection signal.
Preferably, the signal emission module further includes touch sensor, and first microcontroller includes counter, place Device is managed, the touch sensor, counter and processor are sequentially connected, and counter calculates the touch sensor within the unit time By touch number, processor will be compared by touch number with the threshold value of setting, if by touch number be greater than setting threshold Value, then open reflected radio and switch and export user information;Conversely, then closing reflected radio switch and not exporting user information.
Preferably, the demodulating and decoding module includes sequentially connected peak detector, average circuit, comparator and solution Code module, the peak detector be used for detect encryption after user information level signal maximum and minimum, it is described put down Equal circuit is used to calculate the average value of maximum and minimum, and set maximum is 1, and minimum 0, the comparator is for general The level signal of user information then takes 1 compared with the average value of maximum and minimum if more than average value, if being less than after encryption Average value then takes 0, all binary codes of the level signal of user information after encrypting finally is obtained, finally according to binary code It is decoded.
Preferably, the signal receiving module further includes RC circuit, and the input terminal of the RC circuit connects the second dipole antenna Line, output end connects demodulating and decoding module, for eliminating the interference of other high-frequency signals.
The content of present invention further relates to a kind of communication means based on vehicular ad hoc network, which is applied to intelligence The communication of vehicle and roadside unit, comprising the following steps: the first dipole antenna obtains the ambient radio-frequency in vehicular ad hoc network Signal is simultaneously converted into electric energy, provides energy for the operation of signal emission module;First microcontroller is defeated according to input signal User information out;Ambient radio-frequency signal of the user information of low frequency to high frequency is carried out coded modulation by code modulation module;Encryption Module encrypts the user information after coded modulation;After user information coded modulation and encryption, pass through the first dipole Antenna is sent;After the user information that the second dipole antenna receives coded modulation and encryption, demodulating and decoding module to its into The user information after demodulating and decoding is decrypted in row demodulating and decoding, deciphering module;Second microcontroller obtains the use after decryption Family information, and according to the work of user information control roadside unit.
Preferably, the method that first microcontroller exports user information according to input signal are as follows: counter calculates In unit time touch sensor by touch number, processor will be compared by touch number with the threshold value of setting, if by The threshold value that number is greater than setting is touched, then opens reflected radio and switchs and export user information;It is opened conversely, then closing reflected radio It closes and does not export user information.
Preferably, the demodulating and decoding method of the demodulating and decoding module are as follows: user information after peak detector detection encryption Level signal maximum and minimum, average circuit calculates the average value of maximum and minimum, set maximum as 1, Minimum is 0, comparator by the level signal of user information after encryption compared with the average value of maximum and minimum, if more than Average value then takes 1, if being less than average value, takes 0, finally obtains all binary systems of the level signal of user information after encrypting Code, is finally decoded according to binary code.
By using the present invention, following effect may be implemented:
1. obtaining energy from ambient radio-frequency signal carrys out driving equipment, additional power supply unit power supply is not needed, is reduced The consumption of the energy and the pollution of environment, therefore the wiring of power supply unit and signal emission module is not needed yet, it avoids because of wiring Aging and caused by failure.
2. being encrypted in the transmission process of signal, it is ensured that the safety communicated in vehicular ad hoc network.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is module connection diagram of the invention;
Fig. 2 is the connection schematic diagram of demodulating and decoding module in the present invention;
Fig. 3 is flow diagram of the invention.
Specific embodiment
Below in conjunction with attached drawing, technical scheme of the present invention will be further described, but the present invention is not limited to these realities Apply example.
The basic idea of the invention is that using the switch technology of electromagnetic wave, electric energy, it, can using the radio frequency signal of surrounding Wireless energy is converted to electric energy, energy is obtained from ambient radio-frequency signal, is powered without additional power supply unit. Due to not needing additional power supply unit power supply, to reduce the consumption of the energy and the pollution of environment, while confession is also omited The wiring of electric equipment and signal emission module avoids failure caused by due to the aging of wiring.In addition, using Encryption Algorithm, It is encrypted in the transmission process of signal, it is ensured that the safety communicated in vehicular ad hoc network.
Fig. 1 is module connection diagram of the invention.In conjunction with attached drawing 1, a kind of communication system based on vehicular ad hoc network System, including being mounted on the signal emission module at intelligent vehicle end and being mounted on the signal receiving module at roadside unit end, signal Transmitting module is powered by the electric energy power supply after conversion, roadside unit by external power supply.Signal emission module includes first micro- Controller, touch sensor, the first dipole antenna, code modulation module and encrypting module;Signal receiving module includes second Dipole antenna, demodulating and decoding module, deciphering module and the second microcontroller.
Wherein, the first microcontroller includes counter, processor, for exporting user information, input according to input signal Signal is that touch sensor input is touched by user, and touch sensor, counter and processor are sequentially connected.Counter counts Calculate within the unit time touch sensor by touch number, processor will be compared by touch number with the threshold value of setting, If being greater than the threshold value of setting by touch number, opens reflected radio and switch and export user information;It is penetrated conversely, then closing reflection Frequency switchs and does not export user information.In the present embodiment, the unit time is set as 3s, and threshold value is traditionally arranged to be 2 times, i.e., user exists The number that touch sensor is touched in 3s is not less than 2 times, then the first microcontroller exports user information.User information can be vehicle License board information, the personal information of car owner etc..
Code modulation module is used to ambient radio-frequency signal of the user information of low frequency to high frequency carrying out coded modulation, so that User information can be transmitted in existing ambient radio-frequency signal.In the present embodiment, it is encoded using FM0 and carries out coded modulation, FM0 encodes full name spacing between two-phase and encodes, and working principle is to indicate logic using level change in a position window.If Level is overturn from the section start of position window, then it represents that 1 " of logic ".If level is in addition to the section start overturning of window in place, window also in place Intermediate flipped then indicates 0 " of logic ".
Encrypting module is for encrypting the user information after coded modulation, to guarantee in user information transmission process Safety, and the not interference by ambient radio-frequency signal.In the present embodiment, it is encrypted and is decrypted using RSA Algorithm: RSA is the Encryption Algorithm of a kind of encryption and decryption message.It is an asymmetric key algorithm, and asymmetry means that there are two not Same key.Public key therein is for encryption data.Private key only known to appointed recipient, is used for ciphertext data.
First dipole antenna using wireless charging technology obtain vehicular ad hoc network in ambient radio-frequency signal and by its Electric energy is converted to, and encrypted user information is sent.For specific technical principle and solution, wireless charging at present Power technology mainly has four kinds of induction, magnetic resonance type, radio waves type, field coupling formula basic modes.In the present embodiment In, environmental electromagnetic wave is converted to by electric current using radio waves type, the distance of signal transmission is more than ten meters.In addition, the second dipole Antenna is for receiving encrypted user information.
As the preferred of the present embodiment, signal emission module further includes reflected radio switch, reflected radio switch connection the One dipole antenna is used to modulate the impedance of the first dipole antenna, to change the energy of the first dipole antenna reflection signal.In difference Ambient radio-frequency signal in, the electric energy being converted to is different.In the present embodiment, it is arranged in the first dipole antenna Adjustable impedance passes through and adjusts impedance and change energy needed for first dipole antenna sends signal.
In conjunction with attached drawing 2, demodulating and decoding module is used to carry out demodulating and decoding to encrypted user information.Specifically, demodulation Decoder module includes sequentially connected peak detector, average circuit, comparator and decoder module, and peak detector is for examining The maximum and minimum of the level signal of user information after encryption are surveyed, average circuit is used to calculate the flat of maximum and minimum Mean value, sets maximum as 1, minimum 0, the level signal of user information and maximum and pole after comparator is used to encrypt The average value of small value compares, and then takes 1 if more than average value, if being less than average value, takes 0, finally obtains user information after encryption Level signal all binary codes, be finally decoded according to binary code.
For deciphering module for the user information after demodulating and decoding to be decrypted, the decipherment algorithm that deciphering module uses is same For RSA Algorithm.
Second microcontroller is used to obtain the user information after decryption, and according to the work of user information control roadside unit Make.User information can be license board information, the personal information of car owner etc. of vehicle.In one embodiment, the second microcontroller The license board information of vehicle is obtained, and whether is searched in the license board information of storage with the presence of identical license board information, if being stored with, It then controls roadside unit and opens door, vehicle is allowed to enter or be driven out to.The work of roadside unit is not limited to open the door, and can also carry out The operation such as charge, is not defined the working method of roadside unit here.
As the preferred of the present embodiment, signal receiving module further includes RC circuit, the input terminal of RC circuit connection the Two dipole antennas, output end connects demodulating and decoding module, for eliminating the interference of other high-frequency signals.
Based on the above-mentioned technical proposal, in the present embodiment, a kind of communication means based on vehicular ad hoc network is further related to, The communication means is applied to the communication of intelligent vehicle and roadside unit.As shown in figure 3, method includes the following steps:
S1. the first dipole antenna obtains the ambient radio-frequency signal in vehicular ad hoc network and is converted into electric energy, is The operation of signal emission module provides energy;
S2. the first microcontroller exports user information according to input signal;
S3. ambient radio-frequency signal of the user information of low frequency to high frequency is carried out coded modulation by code modulation module;Encryption Module encrypts the user information after coded modulation;
S4. it after user information coded modulation and encryption, is sent by the first dipole antenna;
S5. after the second dipole antenna receives the user information of encryption, demodulating and decoding module carries out demodulating and decoding to it, The user information after demodulating and decoding is decrypted in deciphering module;
S6. the second microcontroller obtains the user information after decryption, and according to the work of user information control roadside unit.
Wherein, the first microcontroller exports the method and demodulating and decoding module of user information according to input signal in S2 Demodulating and decoding method has been described in detail in the above-described embodiments, and explanation is not repeated herein.
Those skilled in the art can make various modifications to described specific embodiment Or supplement or be substituted in a similar manner, however, it does not deviate from the spirit of the invention or surmounts the appended claims determines The range of justice.

Claims (8)

1. a kind of communication system based on vehicular ad hoc network, signal emission module and peace including being mounted on intelligent vehicle Mounted in the signal receiving module of roadside unit, which is characterized in that the signal emission module includes the first microcontroller, the first idol Pole antenna, code modulation module and encrypting module, the signal receiving module include the second dipole antenna, demodulating and decoding mould Block, deciphering module and the second microcontroller;Wherein, first microcontroller is used to export user's letter according to input signal Breath;
The code modulation module is used to user information carrying out coded modulation;
The encrypting module is for encrypting the user information after coded modulation;
First dipole antenna is used to obtain the ambient radio-frequency signal in vehicular ad hoc network and be converted into electric energy, and For sending encrypted user information;
Second dipole antenna is for receiving encrypted user information;
The demodulating and decoding module carries out demodulating and decoding to encrypted user information;
The deciphering module is for being decrypted the user information after demodulating and decoding;
Second microcontroller is used to obtain the user information after decryption, and according to the work of user information control roadside unit Make.
2. the communication system according to claim 1 based on vehicular ad hoc network, which is characterized in that the signal transmitting Module includes reflected radio switch, and reflected radio switch first dipole antenna of connection is used to modulate the resistance of the first dipole antenna It is anti-, to change the energy of the first dipole antenna reflection signal.
3. the communication system according to claim 2 based on vehicular ad hoc network, which is characterized in that the signal transmitting Module further includes touch sensor, and first microcontroller includes counter, processor, the touch sensor, counter And processor is sequentially connected, counter calculate within the unit time touch sensor by touch number, processor will be touched Number is touched to be compared with the threshold value of setting, if by touch number be greater than setting threshold value, open reflected radio switch and it is defeated User information out;Conversely, then closing reflected radio switch and not exporting user information.
4. the communication system according to claim 1 based on vehicular ad hoc network, which is characterized in that the demodulating and decoding Module includes sequentially connected peak detector, average circuit, comparator and decoder module, and the peak detector is for examining The maximum and minimum of the level signal of user information after encrypting are surveyed, the average circuit is for calculating maximum and minimum Average value, set maximum as 1, minimum 0, the level signal of user information and pole after the comparator is used to encrypt The average value of big value and minimum compares, and then takes 1 if more than average value, if being less than average value, takes 0, after finally obtaining encryption All binary codes of the level signal of user information, are finally decoded according to binary code.
5. the communication system according to claim 1 based on vehicular ad hoc network, which is characterized in that the signal receives Module further includes RC circuit, and the input terminal of the RC circuit connects the second dipole antenna, and output end connects demodulating and decoding module, is used In the interference for eliminating other high-frequency signals.
6. a kind of communication means of system according to claim 1-5, which is applied to intelligent vehicle With the communication of roadside unit, which comprises the following steps:
First dipole antenna obtains the ambient radio-frequency signal in vehicular ad hoc network and is converted into electric energy, emits for signal The operation of module provides energy;
First microcontroller exports user information according to input signal;
User information is carried out coded modulation by code modulation module;
Encrypting module encrypts the user information after coded modulation;
After user information coded modulation and encryption, sent by the first dipole antenna;
After the second dipole antenna receives the user information of encryption, demodulating and decoding module carries out demodulating and decoding to it, decrypts mould The user information after demodulating and decoding is decrypted in block;
Second microcontroller obtains the user information after decryption, and according to the work of user information control roadside unit.
7. the communication system according to claim 6 based on vehicular ad hoc network, which is characterized in that first micro-control The method that device processed exports user information according to input signal are as follows: counter calculates the touch sensor within the unit time and touched Number, processor will be compared by touch number with the threshold value of setting, if being greater than the threshold value of setting by touch number, be opened Reflected radio switchs and exports user information;Conversely, then closing reflected radio switch and not exporting user information.
8. the communication system according to claim 6 based on vehicular ad hoc network, which is characterized in that the demodulating and decoding The demodulating and decoding method of module are as follows: the maximum and minimum of the level signal of user information after peak detector detection encryption, Average circuit calculate maximum and minimum average value, set maximum be 1, minimum 0, comparator by encryption after user The level signal of information then takes 1 compared with the average value of maximum and minimum, if more than average value, if being less than average value, 0 is taken, all binary codes of the level signal of user information after encrypting finally is obtained, is finally decoded according to binary code.
CN201810429404.0A 2018-05-08 2018-05-08 Communication system and method based on vehicular ad hoc network Pending CN108966178A (en)

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Application Number Priority Date Filing Date Title
CN201810429404.0A CN108966178A (en) 2018-05-08 2018-05-08 Communication system and method based on vehicular ad hoc network

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Application Number Priority Date Filing Date Title
CN201810429404.0A CN108966178A (en) 2018-05-08 2018-05-08 Communication system and method based on vehicular ad hoc network

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CN108966178A true CN108966178A (en) 2018-12-07

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Publication number Priority date Publication date Assignee Title
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CN201975807U (en) * 2010-12-29 2011-09-14 北京握奇数据系统有限公司 Semi-passive vehicle-mounted terminal
CN102624917A (en) * 2012-03-29 2012-08-01 杨涛 Privacy protection system based on broadcast and attribute encryption technology
CN104639197A (en) * 2013-11-15 2015-05-20 广州杰赛科技股份有限公司 Communication device based on environmental signal reflection

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100083389A (en) * 2009-01-13 2010-07-22 (주)코스페이스 Vehicle terminal for saving power and method for controlling vehicle terminal for saving power
CN201975807U (en) * 2010-12-29 2011-09-14 北京握奇数据系统有限公司 Semi-passive vehicle-mounted terminal
CN102624917A (en) * 2012-03-29 2012-08-01 杨涛 Privacy protection system based on broadcast and attribute encryption technology
CN104639197A (en) * 2013-11-15 2015-05-20 广州杰赛科技股份有限公司 Communication device based on environmental signal reflection

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